Liming effect on changes of soil propert
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---------------------------------------------------------------------------------------------------Research Article
ISSN 2320-2912
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------LIMING EFFECT ON CHANGES OF SOIL PROPERTIES OF WHEAT FIELD: A CASE OF
BARIND AREA IN BANGLADESH
MD. KAMARUZZAMAN1, MD.NURUL ISLAM2, *MD. NOOR-E-ALAM SIDDIQUE, BIKASH
CHANDRA SARKER3, MD. JAHIDUL ISLAM4 and SIKDAR MOHAMMAD MARNES RASEL5
1Principal
Scientific Officer, Soil Resource Development Institute, Regional Office, Rajshahi.
Scientific Officer, Soil Resource Development Institute, Regional Office, Rajshahi.
*Md. Noor-E-Alam Siddique, Senior Scientific Officer, Soil Resources Development Institute
(SRDI), Ministry of Agriculture, District Office, Pabna-6600, Bangladesh.
3,4Professor, Department of Agricultural Chemistry, Hajee Mohhammad Danesh Science and
Technology University, Dinajpur.
5Sikdar Mohammad Marnes Rasel, Senior Scientific Officer, Soil Resources Development
Institute, Dhaka, Bangladesh.
2Senior
ABSTRACT
The initial soil was silty loam having pH 4.90, Organic matter 1.92%, total N 0.12%,
available P 4.00 µg g-1, K 0.040 meq 100 g-1, available Ca 1.50 meq 100 g-1, Mg 0.98 meq
100 g-1 and S 12.00 µg g-1. There were six lime treatments viz.T1: Control, T2 : 0.5 t lime
ha-1 , T3 : 1.0 t lime ha-1, T4 : 1.5 t lime ha-1, T5 : 2.0 t lime ha-1, and T6 : 2.5 t lime ha-1.
Dolochun was used as the liming material.
The design of the experiment was
Randomized Complete Block Design (RCBD )with three replications. Every plot received
140.0 kg N, 25.0 kg P, 106.0 kg K, 3.06 kg S, 3.6 kg Zn and 0.6 kg B ha -1 from urea, TSP,
MoP, gypsum, zinc sulphate (monohydrate) and boric acid, respectively. The post
harvest soils were analyzed for pH, OM, available P, Ca, Mg and K. The application of
different rates of lime to soil progressively increased pH, OM and availability of P and
gradually decreased K, Ca and Mg in soils at 30 DAL. Liming significantly increased at
30 DAL pH, OM but K, P, Ca, Mg decreased from 60 DAL up to 120 DAL. Available K, P,
Key Words: Soil, Barind Tract, Wheat, Lime, Plant Nutrients Availability, Grain Yield
*Corresponding Author: [email protected]
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Page
associated with increased wheat yields.
11
Ca and Mg were significantly increased due to application of lime which was mainly
INTRODUCTION
Nutrient
production is not sufficient enough to feed
availability
in
soil
her population. Wheat can be a good
depends on the pH value of soils. On the
supplement of rice and it can play a vital
basis of pH, soil are classified as alkaline,
role to feed her population. From the
neutral and acidic having pH range 6.6 to
nutritional
7.4. (Hausenbuiller, 1972). Most of the
preferable to rice for its higher protein
plant nutrients are highly available in
content. In Bangladesh about 3.58 lac
neutral soil having pH 6.6 to 7.4. But soil
hectare of land is covered by wheat
acidity is a major growth -limiting factor
producing 9.95 lac metric ton with an
for plants in many parts of the world
average yield of 2.78 t ha-1 during the year
(Adams, 1980).
2011-2012 (BBS, 2012). The cultivation of
wheat
The
soils
of
North-West
part
point
needs
of
only
view,
one
wheat
or
is
two
of
supplementary irrigation while a boro rice
Bangladesh are light textured, low in OM
crop needs about 15-20 irrigation during
and strongly acidic to moderately acidic in
the growth period. It is a future challenge
nature, pH ranges from 4.5 to 5.5 (FRG,
for Bangladesh to better exploit the
2005). The status of available P, Ca and Mg
potential of the production of wheat crop
of these soils are low. The sandy soil has
to
low cation exchange capacity. These soils
requirement without endangering
have high content of aluminum, iron and
environment.
meet
the
country’s
grain
food
the
manganese and deficiencies of nitrogen,
calcium,
potassium,
The wheat yield in this country is low.
common.
There are several reasons that can explain
Aluminum toxicity is responsible for the
the yield variation, which cover both biotic
poor yield of crops in acid soils.
and abiotic factors. Among the biotic
phosphors
magnesium,
and
boron
are
Among the cereal crops, wheat is next to
varieties, incidence of diseases and pests
12
rice in Bangladesh. Although, rice is the
(Hossain et al., 1995) and abiotic factors
Page
factors, unavailability of high yielding
staple food of Bangladesh but its total
such as high temperature, moisture stress
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and nutrient deficiency (Jahiruddin et al.,
phosphorus and boron are common.
1992; Islam et al., 1999) are responsible for
Aluminum toxicity is responsible for poor
lower productivity of wheat in the tropics
yields in acid soils. There are some
and sub-tropics. Among these factors, the
reclamation processes for acid soils, for
most dominating factor that is a vital
instance
barrier for crop productivity is problem
availability of P, Ca, Mg and Mo and
soil like acidic soil, saline soil etc. There
renders iron, and manganese insoluble
are different types of problem soils in
and
Bangladesh. These soils restrict the growth
effectiveness and decreases plant diseases
of plants and make crop production
(Sahai, 1990). Thus, the crop plants may
difficult and sometimes impossible.
have a better nutrition and the crop may
liming
harmless,
that
increases
increases
the
fertilizer
produce a good yield. Farmers in the
Special management practices need to be
Northern part of Bangladesh are applying
applied in such soils for economic crop
a large amount of fertilizers for wheat
production. Acid soil in Bangladesh is one
production but they do not get good
of the problematic soils. The potential of
yields. Unless the soil pH is raised to
acid soil for crop production is limited due
around neutrality, the availability of
to less availability of phosphorus and
nutrient elements will limit the growth of
toxicity of aluminum. For example, the
plants.
light textured, low in organic matter and
Liming also promotes the decomposition
strongly acidic to moderately acidic (pH
of organic matter by making condition
ranges from 4.5 to 5.5) in nature (BARC,
more
2005). The status of available P, Ca and Mg
microorganisms. The bacteria that fixed
of these soils are low. The sandy soil has
nitrogen
low cation exchange capacity. These soils
symbiotically and in the nodules of
have high content of aluminum, iron, and
legumes are specially stimulated by the
13
manganese, and deficiencies of nitrogen,
application of lime. The successful growth
Page
soils of Northwest part of Bangladesh are
calcium,
of most soil microorganisms depends
magnesium,
potassium,
favorable
from
for
the
the
air
growth
both
of
non-
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upon lime that satisfactory biological
Barind tract and The Madhupur Tract. The
activities cannot be expected if calcium
Barind tract has mainly level, poorly
and magnesium levels are low. Infertility
drained highland though it has a small
of acid soil is a major limitation to crop
area of dissected hilly lands at the western
production on highly weathered and
fringe and a small well drained highland
leached soil throughout the world and
area
research
soil
experimental field belongs to the AEZ No.
management practices to sustain high
26, Barind Tract Soil. Amnura (Soil series
yield through fertilization and liming to
of Bangladesh) soils are developed in
improve soil quality at a high level to
deeply weathered Madhupur clay. The
meet plant requirements. The specific
soils are mixed yellowish brown and grey
objective is to investigate the changes of
to light grey silt loams to silty clay loams
chemical properties of soil under different
grading into grey, mottled yellowish
levels of lime in wheat field.
brown, weathered Madhupur clay below
project
deal
with
at
the
eastern
fringe.
The
about 2 feet, a member of hyperthermic
MATERIALS AND METHODS
Aeric
Study area
Inceptisol having only few horizons,
The experimental field is located at
25o
09' 58.0" N latitude and
88o
28' 32.6" E
longitude at a height of 28.0 m above the
mean sea level. The experiment was
conducted
at
Mouza
Tiloni,
Village
Boikanthapur under Sapahar Upazila in
Naogaon District during the period from
October 2011 to April 2012.
Haplaquept
under
the
order
developed under aquic moisture regime
and variable temperature conditions, Agro
ecological
Appraisal
of
Bangladesh,
(UNDP and FAO, 1988). According to
BARC ‘Fertilizer Recommendation Guide
(2005) general characteristics of the soil
and chemical characteristics of initial
composite soil sample (0-15 cm depth)
initial status and tested, are presented in
Within total land surfaces of Bangladesh,
Table 1 and Table 2.
terrace constitutes about 8% namely The
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Soil
14
which were collected on October 2011 for
Table 1: Morphological and physical
characteristics of the soil
AEZ
High Barind Tract
(AEZ 26)
General Soil Type Deep Grey Terrace
soils
and
Grey
Valley soil
Parent material
Madhupur clay
Drainage
Imperfectly drained
Topography
High land
Flood level
Above flood level
Table 2: Physical characteristics of soil
Sand (%)
42
Silt (%)
32
Clay (%)
26
Textural class
Silt loam to Silty
clay loam
The liming material had 20% Ca and
10% Mg. The liming material was applied
to the soil on 07 November 2011.
Land preparation
Repeated ploughing with power tiller and
country plough was done on 07 November
2011 and the layout of the experiment was
done as per statistical design. Liming was
done
and
the
liming
material
was
incorporated to soil by spading. Final land
was prepared on 27 November 2011.
Ploughing was followed by laddering in
Crop
order to break clods as well as level the
The test crop was wheat. Certified seeds
land. All weeds, stubbles and crop
were collected from the Regional Wheat
residues
Research
experimental field.
Centre,
BARI,
Shampur,
were
removed
from
the
Rajshahi. The variety used was Prodip.
Experimental design
Treatments
The
experiment
was laid out
in a
There were six different rates of lime
Randomized Complete Block Design. All
application in wheat as follows,
the treatments were replicated three times.
There were altogether 18 (6x3) unit plots,
T2 : 0.5 t lime ha-1
each plot measuring 2. 5m x 4 m. Inter-
T3 : 1.0 t lime ha-1
block and Inter-plot spacing were 0 .7/m
T4 : 1.5 t lime ha-1
and 0.5/m respectively.
15
T1 : Control
Page
T5 : 2.0 t lime ha-1
T6 : 2.5 t lime ha-1
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Figure 1. Layout of the experimental plot.
Block-1
Block-2
T4
0.5m
Block-3
T1
T5
0.7m
T1
0.7m
T6
T4
T6
T3
T1
T2
T2
T3
T1
T4
T2
T5
T5
T6
Treatment
incorporated to soil by spading one day
T1 : Control, T2 : 0.5 t lime ha-1 ,
T3 : 1.0 t lime
ha-1,
T4 : 1.5 t lime
before sowing.
ha-1,
Sowing of seeds
T5 : 2.0 t lime ha-1, T6 : 2.5 t lime ha-1
Seeds were sown in 28 November
2011, the seed rate being 125 kg/ha.
Fertilizer application
Sowing was done continuously in 20 cm
gypsum,
(monohydrate)
zinc
and
boric
sulphate
acid
were
applied on the basis of Soil Test value
during final land preparation. Nitrogen
was applied @ 140 kg
kg ha-
1
ha-1
from urea, P @ 5
from TSP, K @ 106 kg ha
-1
from
MOP, S @ 3.06 kg ha -1 from gypsum, Zn @
3.6
kg
ha-1
from
zinc
sulphate
(monohydrate) and B @ 0.6 kg ha-1 from
boric acid . Urea was applied in two splits,
2/3
was
applied
during
final
land
apart lines covered by soil manually.
Intercultural operations
Intercultural operations were done
to ensure normal growth of the crop. The
following intercultural operations were
followed:
Irrigation
Three irrigations were applied, the
first irrigation after 18 days of sowing ,
second irrigation after 29 days of sowing
at crown root initiation stage and the third
after 62 days of sowing at heading stage.
preparation and rest 1/3 was applied 20
days after sowing. The fertilizers were
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16
MOP,
Page
The total amount of urea, TSP,
Number of tillers plant-1
Weeding
Weeding was done twice during
Ten plants were selected from each
the whole growing period, the one after 19
plot randomly. The number of effective
days of sowing and the other after 38
and
days.
counted and averaged.
Insect and pest control
Spike length
During maturation, four plots were
non-effective
tillers
recorded and averaged.
was
Grains spike-1
control
by
measures
using
and
Ten spikes were selected and the filled and
application of zinc phosfide.
unfilled grains spike-1 were recorded and
Harvesting
averaged.
The crop was harvested at maturity
Thousand grain weight
after about four months of sowing (March
Thousand grains were randomly
25, 2012). For data collection, ten plants
selected from each plot and the weight of
from each plot were sampled randomly.
grains was recorded after sun drying by
The crop was cut at the ground level.
an electrical balance.
Threshing, cleaning and drying of grain
Grain yield
were done separately for every plot. Then
Grains from each unit plot were
plot- wise weights of grain and straw were
dried and then weighed carefully. The
recorded.
results were expressed as kg ha-1 on 14%
Data collection
moisture basis.
Data were collected on the following yield
Shoot and Root weight
Like grain yield, biomass and dry
and yield components.
weight of shoot and root for individual
The plant height was measured
from the ground level to top of the spike.
plot were recorded and expressed as kg
ha-1.
From each plot, height of 10 plants were
measured and averaged.
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17
Plant height
Page
mechanical
instantly
was
Length of spike of ten plants per plot was
slightly infested by field rat and the pest
controlled
plant-1
Harvest Index
Analysis of soil samples:
I. About 15 percent moisture in grain.
Mechanical analysis: Mechanical analysis
II. Grains in hard dough stage.
was
III. Yellowing of spikelets.
(Buoyoucos, 1927). The textural class was
done
by
determined
SOIL ANALYSIS
hydrometer
following
method
Marshall’s
triangular coordinate using USDA system.
The initial soil sample was analyzed for
both physical and chemical properties
Soil pH: Soil pH was measured with the
such as soil texture, pH, organic matter,
help of a glass electrode pH meter, the
total N and available P, K, S, B, Zn, Ca, Mg
soil-water ratio being 1:2.5 as described by
contents. The post harvest soils were
(Jackson, 1962).
analyzed for soil pH, available P, Ca and
Organic matter content: Organic carbon
Mg.
content of soil was determined following
Collection
and
preparation
of
soil
wet oxidation method (Page et al., 1982).
samples
The
Before land preparation, soil samples were
calculated by multiplying the percent
collected randomly from 9 different spots
organic carbon with the van Bemmelen
of the field from a depth of 0-15 cm. A
factor, 1.73 (Piper, 1950).
was
prepared
was
by
mixing the sub-samples and the weeds,
Total nitrogen: Total N content in soil was
stubbles, stones, etc. were removed from
determined by micro- Kjeldahl method.
the soil. After harvest of wheat crop, the
The soil was digested with 30% H2O2,
soil samples were collected plot wise.
conc. H2SO4 and catalyst mixture (K2O4:
Then the soil samples were air-dried,
CuSO4. 5H2O: Se = 10:1:0.1). Nitrogen in
ground and sieved through a 2-mm (10-
the digest was determined by distillation
mesh) sieve. The sieved soil was stored in
with 40% NaOH followed by titration of
18
sample
of organic matter
a clean plastic container for subsequent
the distillate trapped in H3BO3 with 0.01
Page
composite
amount
mechanical and chemical analysis
N H2SO4.
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Available
Available
phosphorus:
P
NH4OAc, pH 7.0 solution followed by
content was extracted from soil with 0.03
measurement
by atomic absorption
M NH4F – 0.025 M HCl (Bray and Kurtz
spectrometer (AAS).
method). The P in the extract was then
determined by developing blue colour
Statistical analysis
with
SnCl2
phosphomolybdate
measuring
the
reduction
of
The data were analyzed statistically by F-
complex
and
test to examine whether the treatment
colour
by
effects
were
significant.
of
the
The
treatments
mean
spectrophotometer at 660 nm wavelength
comparisons
were
(Page et al, 1982).
evaluated by DMRT (Ducan's Multiple
Range Test). The analysis of variance
Available sulphur: Available S of soil
(ANOVA) for different parameters was
content was determined by extracting soil
done by a computer package programme
sample with CaCl2 (0.15%) solution as
"MSTATC”.
described by (Page et al, 1982). The S
content in the extract was determined
Results and Discussion
turbidimetrically and the turbid was
Soil pH
measured by spectrophotometer at 420 nm
A significant change was found on the
pH values of soil that were collected after
wavelength.
liming at different treatments and it was
Exchangeable potassium: Exchangeable K
increased steadily with the increased rates
content
by
of lime application (Figure 02). The pH
extraction with 1M NH4OAc, pH 7.0
value of before liming were 5.3, 5.2, 5.3,
solution followed by measurement of
5.3, 5.4 and 5.3, which changed to 5.6, 5.5,
extractable
5.6, 5.5, 5.6 and 5.9 in treatment T1, T2, T3,
of
soil
K
was
by
determined
flame
photometer
T4, T5 and T6, respectively, after 30 DAL.
Exchangeable calcium and magnesium:
19
Exchangeable Ca and Mg content of soil
Page
(Jackson, 1962).
was determined by extraction with 1M
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Chemical properties of post harvest soil
Table 1: Effects of liming on changes in soil properties of post harvest soils of
wheat field
These finding was also in agreement with the observation of (Rao et al., 1982). A
significant increase in pH was obtained with lime application and the better pH ranges
were observed with treatment T4 and T5. Similar observations were also reported by
(Basak, 2010; Halim, 2012) that pH of soil steeply increased during the first 30 days after
liming, then slightly increased and finally slightly decreased with time until the end of
120 days of experimentation.
Page
20
Figure 2: Soil pH status before liming and at different days after liming
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Soil Organic Matter
The average soil organic matter content in initial soil and before liming was slightly
lower than soils collected after adding organic matter in the experimental field as per as
necessary on the basis of crop requirement (Table 1 and figure 2). After adding organic
matter to experiment field the status of OM was found to change significantly and
increased up to 60 days, but at 90th, day it was decreased due to application of liming.
The status of OM was increased with the advancement of the time, where the highest
value of OM 2.25 and 1.89 at 30 DAL in respectively T4 and T1 treatments, but at 120
DAL the status was found identical. This was possibly due to the liming affect which
increased pH of the initial acidic soil, as a result the microbial activities of the soil
increased. Possibly due to increased microbial activities soil organic matter was
decreased. But the effect of liming may vary with time and environment condition such
as soil temperature and moisture as reported by Kreutzer (1995). Similar observations
were also reported by (Basak, 2010; Halim, 2012).
Page
21
Figure 3: Soil OM status before liming and at different days after liming
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Available Phosphorus
The application of different rates of lime
They found that phosphours is not mobile
increased the P availability of soils days
in the soil and can result in high
after liming up to harvest of wheat (Figure
concentrations over time. Samia (2007)
4).
available
observed that the status of available P on
phosphorus in the soil was 4.0 μg g-1 soil
soils was positively correlated with the
and days after lime up to the post harvest
rates of lime application. This result
soils had the values of 120th DAL 32.97,
agreed with (Basak, 2010) to find out the
37.40, 51.20, 44.33 and 43.97μg g-1 soils in
pH of initial soil and soil before liming
T1, T2, T3, T4, T5 and T6 respectively. A
was below 6.0. But the pH of soils after
significant effect was found to the change
liming were higher than 6.01, Where Bray
of available P. The status of available P on
and Kurtz’ method was used for P
soils was positively correlated with the
determination, with ammonium fluoride
rates of lime application. Lime application
(NH4F) as extracting solution.
The
initial
value
of
increased the soil pH which helped the
release of fixed P from the oxides and
The pH of soils that were collected after
hydroxides of Fe and Al thus increased the
liming was greater than 6.0 where Olsen’s
P availability in soil.
method were used for P determination
with sodium hydrogen carbonate solution
In general soil pH should be maintained
as
6.0 to 7.5 to maximize plant available
fluoride extract more P even bound and
phosphorus.
higher
fixed phosphorus form soil compared with
concentration of P was due to the
sodium hydrogen carbonate solution. So,
application of phosphate fertilizer in acidic
in lower pH the availability of P was
soil over time because P is not mobile. This
slightly high than higher pH in the study
result agreed with the report of (Samia,
area.
the
solution.
Ammonium
22
Possibly
extracting
Page
2007).
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Figure 4: Soil P status before liming and at different days after liming.
Available Calcium
soil after liming. The status of available Ca
Available calcium in the sample that was
on soils was positively correlated with the
collected days after liming increased
rate
steadily with increase rates of lime
application of lime increased the soil pH,
application, but it decreased in treatment
which increased available Ca in soil. The
T5 and T6. The available Ca of the soil
co-efficient of variation was 6.37% and
before liming was 2.22, 2.72, 2.6, 2.34 and
that of LSD was 0.019 at 1% level of
2.47 meq 100g soil-1 respectively. After
significant. Which means a significant
30th DAL that became 1.78, 2.05, 2.26, 2.46,
increased of Ca (2.46 meq 100g soil-1) was
2.21 and 2.05 with T1, T2, T3, T4, T5 and
obtained with lime application and the
T6 treatments respectively. The result was
better concentration of Ca was observed
found that the decreasing trend after 30th
2.46 in respect of treatment T4. This result
DAL was found upto 120DAL (Table 1
agreed to report of (Garica, 1975) that the
and Figure 6). The liming material used as
pH of acid soils increases due to liming,
Dolochun [Dolomite, CaMg(CO3)2], which
and adsorption is higher with higher rate
on dissolution released a large amount of
of
Ca and thus the available Ca increased in
deficiencies are ameliorated.
lime
application,
application
and
because
calcium
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23
lime
Page
of
Figure 5: Soil Ca status before liming and at different days after liming
Available Magnesium
7). The liming material used as Dolochun
Magnesium availability in soil samples
[Dolomite,
collected during experiment was increased
dissolution released a large amount of Mg
just after liming at 30th DAL, but it was
that increased the pH of soils. The co-
gradually decreased with different rate of
efficient of variation was 9.16 and LSD
lime application up to 120th DAL. The
was 0.327.
content of available Mg in soil of sample
increase of Mg was obtained with lime
collected before liming was
0.52, 0.56,
application and the highest lime rate was
0.55, 0.69, 0.59 and 0.56 meq 100g soil-1
more effective than lower rate. The highest
which changed after 30th DAL to 0.09,
value was found 1.61 in respect of
1.24, 1.54, 1.56, 1.61 and 1.55 meq 100g
treatment T5. This finding was also in
soil-1 in T1, T2, T3, T4, T5 and T6
consonance with the finding of Garcia
treatment respectively (Table 1 and Figure
(1975). Similar observations were also
CaMg(CO3)2],
which
on
Page
reported by (Miller, 2000).
24
Which means a significant
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Figure 6: Soil Mg status before liming and at different days after liming
Available Potassium
observations
The application of different rate of lime
(Jackson, 1962) and (Basak, 2010) that the
increased the K availability of soils at after
supply of exchangeable potassium in the
30th days after liming, but it decreased
soil is often low in acid soils, due to the
gradually up to the 120th days after
formation of soluble K salt by soil acids
liming. The result showed that numerical
and their loss by leaching from the soil.
different but level of lettering were
The availability of K begins to fall below a
identical. The CV was 15.35 and that of
pH of 6.0. This finding was also in
LSD was 0.0818 which was not significant
consonance with the finding of (Basak,
(Table 1 and Figure
2010)
found
that
concentration of available K was obtained
promotes
with treatment T4 (1.5 t ha-1). Similar
availability to plant.
reported
liming
demotes
acid
by
soils
potassium
Page
and
also
25
8). But better
were
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Figure 7: Soil K status before liming and at different days after liming
Summary and conclusion
The
experiment
was laid out
4.9 which increased to more than 6.0 due
in a
to the application of more than 1.5 t lime
randomized complete block design with
ha-1. The application of different rates of
three replications. The size of the unit plot
lime
was 2.5m x 4m. Soil of the experimental
availability of the soils of different lime
field was sandy loam having initial pH 4.9,
treatments after harvest of wheat.
organic matter 1.92%, total N 0.12%,
available Mg of the initial soil was 0.98
available P 4.0 µg g-1, K 0.04 meq 100 g-1,
meq 100 g-1 soil which increased to 1.61
available Ca 3.5 meq 100 g-1, Mg 0.98 meq
meq 100 g-1 due to application of 2.0 t lime
100 g-1 and S 12.00 µg g-1. Post harvest soil
ha-1 at 30 DAL. Similarly, the available Ca
samples (120th DAL) were analyzed for
of the initial soil was 1.5 meq 100 g-1 soil
pH, OM, available P, K, Ca and Mg.
which rose to 2.46 meq 100 g-1 soil due to
increased
the
P,
Ca
and
Mg
The
application of 1.5 t lime ha-1 at 30 DAL.
The results from this experiment showed
steadily with increase in rates of lime
that
application. The pH of the initial soil was
cultivation in the Amnura soil series of
liming
is
necessary
for
wheat
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Page
different treatments of wheat increased
26
Soil pH of the post harvest soils in
Sapahar Upazila of Naogaon District. The
application of lime to soil increased soil
pH, available P, Ca and Mg in soils which
had positive impact on yield components
resulted in higher
yield of wheat. The
application of 1.5 t lime ha-1 appears to be
optimum for wheat cultivation in the
study area. However, further research
may be carried out on the effects of lime
on yield bearing characteristics of wheat
for a sustainable food production.
Conflict of Interest:
Page
27
There is no Conflict of Interest.
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REFERENCES
Adams, F. 1980. Soil acidity and Liming. Crop response to lime in the western United
States, Madison, Wisconsin USA.
BARC (Bangladesh Agricultural Research Council), 2005. Fertilizer Recommendation
Guide-2005. Soil Pub. No. 45. Farmgate, Dhaka.
Basak,V, 2010. Nutrient Dynamics and Chemical Properties of Acid soil under different
liming conditions in Mungbean field followed by Transplanted aman. MS Thesis Student
No. 0905046, HSTU, Dinajpur.
BBS (Bangladesh Bureau of Statistics), 2012. Statistical Yearbook of Bangladesh.
Bangladesh Bur. Stat.
Ministry of Planning. Govt. of the People's Republic of
Bangladesh. Dhaka.
Buoyoucos, G. J. 1927. Hydrometer method improved for making particle size analysis of
soils. Agron. J. 54: 4661-4665.
FRG (Fertilizer Recommendation Guide, 2005), Bangladesh Agricultural Research
Council, Bangladesh.
Garica, F.V. 1975. Depth of liming on very acid soils. M. Sc. Thesis No. 842 AIT, Bangkok,
Thailand.
Halim, A. 2012. Comparative study of Nutrient Dynamics in Old Himalayan Piedmont
Page
No. 1005055,HSTU, Dinajpur.
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soil under different levels of lime and plant growth regulator-NAA. MS Thesis Student
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Hausenbuiller, R. L. 1972. Soil Science: Principle and Practices. W.M.C. Brown Company,
Pub. USA.
Haynes, R. J. 1984. Lime and phosphorus in the soil plant system. Adv. Agron. 37: 249315.
Hossain, I., Yahia, G. and Jahiruddin, M. 1995. Effects of copper, boron and molybdenum
on leaf spot disease and grain set of wheat. Bangladesh J. Train. Dev. 8: 77-81.
Islam M. R., Islam, M. S., Jahiruddin, M. and Hoque, M. S. 1999. Effects of sulphur, zinc
and boron on yield, yield components and nutrient uptake of wheat. Pakistan J. Sci. Ind.
Res. 42: (8), 137-140.
Jahiruddin, M. Hoque, M. S., Haque, A. K. M. M. and Roy, P. K. 1992. Influence of boron,
copper and molybdenum on grain formation on wheat. Crop Res. 5: 35-42.
Kreutzer, K. 1995. Effects of forest liming on soil processes. Plant and Soil, v.-168-169,
p.447-470.
Jackson, M.L. 1962. Soil Chemical Analysis. Prentice Hall of India Pvt. Ltd. New Delhi.
pp. 10-14.
Miller, P.R. 2000. Effect of varying seeding date on crop development, yield and yield
components in canaryseed. Canadian J. Plant Sci. 80(1): 83-86.
Page
II. 2nd Ed. Ani. Soc. Agron. Inc. Madi., Wis., USA.
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Page, A. L., Miller, R. H. and Keeny, D. R. 1982. Methods of Soil Analysis. Part-I and Part-
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Rao, B. K. Panchaksharjah, S; Patil, B. N., Narayana, A. and. Raiker, D. I. S. 1982.
Chemical composition of irrigation waters, from selected parts of Bijaypur district,
Kamataka. Mysore Journal of agricultural Science 16(4): 426-432.
Sahai, V. N. 1990. Fundamental of Soil Science. Kalyani Publishers, Ludhiana, New
Delhi. P 76-84.
Samia, B.S. 2007. Effect of liming on soil properties and yield of wheat. MS Soil Sci. Thesis
student no. 0605015,HSTU, Dinajpur.
UNDP and FAO. 1988. Land Resources Appraisal of Bangladesh for Agricultural
Development. Report 2, Agroecological Regions of Bangladesh. UN Dev. Prog. Food and
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Agric. Org.: 212-221.
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---------------------------------------------------------------------------------------------------Research Article
ISSN 2320-2912
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------LIMING EFFECT ON CHANGES OF SOIL PROPERTIES OF WHEAT FIELD: A CASE OF
BARIND AREA IN BANGLADESH
MD. KAMARUZZAMAN1, MD.NURUL ISLAM2, *MD. NOOR-E-ALAM SIDDIQUE, BIKASH
CHANDRA SARKER3, MD. JAHIDUL ISLAM4 and SIKDAR MOHAMMAD MARNES RASEL5
1Principal
Scientific Officer, Soil Resource Development Institute, Regional Office, Rajshahi.
Scientific Officer, Soil Resource Development Institute, Regional Office, Rajshahi.
*Md. Noor-E-Alam Siddique, Senior Scientific Officer, Soil Resources Development Institute
(SRDI), Ministry of Agriculture, District Office, Pabna-6600, Bangladesh.
3,4Professor, Department of Agricultural Chemistry, Hajee Mohhammad Danesh Science and
Technology University, Dinajpur.
5Sikdar Mohammad Marnes Rasel, Senior Scientific Officer, Soil Resources Development
Institute, Dhaka, Bangladesh.
2Senior
ABSTRACT
The initial soil was silty loam having pH 4.90, Organic matter 1.92%, total N 0.12%,
available P 4.00 µg g-1, K 0.040 meq 100 g-1, available Ca 1.50 meq 100 g-1, Mg 0.98 meq
100 g-1 and S 12.00 µg g-1. There were six lime treatments viz.T1: Control, T2 : 0.5 t lime
ha-1 , T3 : 1.0 t lime ha-1, T4 : 1.5 t lime ha-1, T5 : 2.0 t lime ha-1, and T6 : 2.5 t lime ha-1.
Dolochun was used as the liming material.
The design of the experiment was
Randomized Complete Block Design (RCBD )with three replications. Every plot received
140.0 kg N, 25.0 kg P, 106.0 kg K, 3.06 kg S, 3.6 kg Zn and 0.6 kg B ha -1 from urea, TSP,
MoP, gypsum, zinc sulphate (monohydrate) and boric acid, respectively. The post
harvest soils were analyzed for pH, OM, available P, Ca, Mg and K. The application of
different rates of lime to soil progressively increased pH, OM and availability of P and
gradually decreased K, Ca and Mg in soils at 30 DAL. Liming significantly increased at
30 DAL pH, OM but K, P, Ca, Mg decreased from 60 DAL up to 120 DAL. Available K, P,
Key Words: Soil, Barind Tract, Wheat, Lime, Plant Nutrients Availability, Grain Yield
*Corresponding Author: [email protected]
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Page
associated with increased wheat yields.
11
Ca and Mg were significantly increased due to application of lime which was mainly
INTRODUCTION
Nutrient
production is not sufficient enough to feed
availability
in
soil
her population. Wheat can be a good
depends on the pH value of soils. On the
supplement of rice and it can play a vital
basis of pH, soil are classified as alkaline,
role to feed her population. From the
neutral and acidic having pH range 6.6 to
nutritional
7.4. (Hausenbuiller, 1972). Most of the
preferable to rice for its higher protein
plant nutrients are highly available in
content. In Bangladesh about 3.58 lac
neutral soil having pH 6.6 to 7.4. But soil
hectare of land is covered by wheat
acidity is a major growth -limiting factor
producing 9.95 lac metric ton with an
for plants in many parts of the world
average yield of 2.78 t ha-1 during the year
(Adams, 1980).
2011-2012 (BBS, 2012). The cultivation of
wheat
The
soils
of
North-West
part
point
needs
of
only
view,
one
wheat
or
is
two
of
supplementary irrigation while a boro rice
Bangladesh are light textured, low in OM
crop needs about 15-20 irrigation during
and strongly acidic to moderately acidic in
the growth period. It is a future challenge
nature, pH ranges from 4.5 to 5.5 (FRG,
for Bangladesh to better exploit the
2005). The status of available P, Ca and Mg
potential of the production of wheat crop
of these soils are low. The sandy soil has
to
low cation exchange capacity. These soils
requirement without endangering
have high content of aluminum, iron and
environment.
meet
the
country’s
grain
food
the
manganese and deficiencies of nitrogen,
calcium,
potassium,
The wheat yield in this country is low.
common.
There are several reasons that can explain
Aluminum toxicity is responsible for the
the yield variation, which cover both biotic
poor yield of crops in acid soils.
and abiotic factors. Among the biotic
phosphors
magnesium,
and
boron
are
Among the cereal crops, wheat is next to
varieties, incidence of diseases and pests
12
rice in Bangladesh. Although, rice is the
(Hossain et al., 1995) and abiotic factors
Page
factors, unavailability of high yielding
staple food of Bangladesh but its total
such as high temperature, moisture stress
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and nutrient deficiency (Jahiruddin et al.,
phosphorus and boron are common.
1992; Islam et al., 1999) are responsible for
Aluminum toxicity is responsible for poor
lower productivity of wheat in the tropics
yields in acid soils. There are some
and sub-tropics. Among these factors, the
reclamation processes for acid soils, for
most dominating factor that is a vital
instance
barrier for crop productivity is problem
availability of P, Ca, Mg and Mo and
soil like acidic soil, saline soil etc. There
renders iron, and manganese insoluble
are different types of problem soils in
and
Bangladesh. These soils restrict the growth
effectiveness and decreases plant diseases
of plants and make crop production
(Sahai, 1990). Thus, the crop plants may
difficult and sometimes impossible.
have a better nutrition and the crop may
liming
harmless,
that
increases
increases
the
fertilizer
produce a good yield. Farmers in the
Special management practices need to be
Northern part of Bangladesh are applying
applied in such soils for economic crop
a large amount of fertilizers for wheat
production. Acid soil in Bangladesh is one
production but they do not get good
of the problematic soils. The potential of
yields. Unless the soil pH is raised to
acid soil for crop production is limited due
around neutrality, the availability of
to less availability of phosphorus and
nutrient elements will limit the growth of
toxicity of aluminum. For example, the
plants.
light textured, low in organic matter and
Liming also promotes the decomposition
strongly acidic to moderately acidic (pH
of organic matter by making condition
ranges from 4.5 to 5.5) in nature (BARC,
more
2005). The status of available P, Ca and Mg
microorganisms. The bacteria that fixed
of these soils are low. The sandy soil has
nitrogen
low cation exchange capacity. These soils
symbiotically and in the nodules of
have high content of aluminum, iron, and
legumes are specially stimulated by the
13
manganese, and deficiencies of nitrogen,
application of lime. The successful growth
Page
soils of Northwest part of Bangladesh are
calcium,
of most soil microorganisms depends
magnesium,
potassium,
favorable
from
for
the
the
air
growth
both
of
non-
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upon lime that satisfactory biological
Barind tract and The Madhupur Tract. The
activities cannot be expected if calcium
Barind tract has mainly level, poorly
and magnesium levels are low. Infertility
drained highland though it has a small
of acid soil is a major limitation to crop
area of dissected hilly lands at the western
production on highly weathered and
fringe and a small well drained highland
leached soil throughout the world and
area
research
soil
experimental field belongs to the AEZ No.
management practices to sustain high
26, Barind Tract Soil. Amnura (Soil series
yield through fertilization and liming to
of Bangladesh) soils are developed in
improve soil quality at a high level to
deeply weathered Madhupur clay. The
meet plant requirements. The specific
soils are mixed yellowish brown and grey
objective is to investigate the changes of
to light grey silt loams to silty clay loams
chemical properties of soil under different
grading into grey, mottled yellowish
levels of lime in wheat field.
brown, weathered Madhupur clay below
project
deal
with
at
the
eastern
fringe.
The
about 2 feet, a member of hyperthermic
MATERIALS AND METHODS
Aeric
Study area
Inceptisol having only few horizons,
The experimental field is located at
25o
09' 58.0" N latitude and
88o
28' 32.6" E
longitude at a height of 28.0 m above the
mean sea level. The experiment was
conducted
at
Mouza
Tiloni,
Village
Boikanthapur under Sapahar Upazila in
Naogaon District during the period from
October 2011 to April 2012.
Haplaquept
under
the
order
developed under aquic moisture regime
and variable temperature conditions, Agro
ecological
Appraisal
of
Bangladesh,
(UNDP and FAO, 1988). According to
BARC ‘Fertilizer Recommendation Guide
(2005) general characteristics of the soil
and chemical characteristics of initial
composite soil sample (0-15 cm depth)
initial status and tested, are presented in
Within total land surfaces of Bangladesh,
Table 1 and Table 2.
terrace constitutes about 8% namely The
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Page
Soil
14
which were collected on October 2011 for
Table 1: Morphological and physical
characteristics of the soil
AEZ
High Barind Tract
(AEZ 26)
General Soil Type Deep Grey Terrace
soils
and
Grey
Valley soil
Parent material
Madhupur clay
Drainage
Imperfectly drained
Topography
High land
Flood level
Above flood level
Table 2: Physical characteristics of soil
Sand (%)
42
Silt (%)
32
Clay (%)
26
Textural class
Silt loam to Silty
clay loam
The liming material had 20% Ca and
10% Mg. The liming material was applied
to the soil on 07 November 2011.
Land preparation
Repeated ploughing with power tiller and
country plough was done on 07 November
2011 and the layout of the experiment was
done as per statistical design. Liming was
done
and
the
liming
material
was
incorporated to soil by spading. Final land
was prepared on 27 November 2011.
Ploughing was followed by laddering in
Crop
order to break clods as well as level the
The test crop was wheat. Certified seeds
land. All weeds, stubbles and crop
were collected from the Regional Wheat
residues
Research
experimental field.
Centre,
BARI,
Shampur,
were
removed
from
the
Rajshahi. The variety used was Prodip.
Experimental design
Treatments
The
experiment
was laid out
in a
There were six different rates of lime
Randomized Complete Block Design. All
application in wheat as follows,
the treatments were replicated three times.
There were altogether 18 (6x3) unit plots,
T2 : 0.5 t lime ha-1
each plot measuring 2. 5m x 4 m. Inter-
T3 : 1.0 t lime ha-1
block and Inter-plot spacing were 0 .7/m
T4 : 1.5 t lime ha-1
and 0.5/m respectively.
15
T1 : Control
Page
T5 : 2.0 t lime ha-1
T6 : 2.5 t lime ha-1
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Figure 1. Layout of the experimental plot.
Block-1
Block-2
T4
0.5m
Block-3
T1
T5
0.7m
T1
0.7m
T6
T4
T6
T3
T1
T2
T2
T3
T1
T4
T2
T5
T5
T6
Treatment
incorporated to soil by spading one day
T1 : Control, T2 : 0.5 t lime ha-1 ,
T3 : 1.0 t lime
ha-1,
T4 : 1.5 t lime
before sowing.
ha-1,
Sowing of seeds
T5 : 2.0 t lime ha-1, T6 : 2.5 t lime ha-1
Seeds were sown in 28 November
2011, the seed rate being 125 kg/ha.
Fertilizer application
Sowing was done continuously in 20 cm
gypsum,
(monohydrate)
zinc
and
boric
sulphate
acid
were
applied on the basis of Soil Test value
during final land preparation. Nitrogen
was applied @ 140 kg
kg ha-
1
ha-1
from urea, P @ 5
from TSP, K @ 106 kg ha
-1
from
MOP, S @ 3.06 kg ha -1 from gypsum, Zn @
3.6
kg
ha-1
from
zinc
sulphate
(monohydrate) and B @ 0.6 kg ha-1 from
boric acid . Urea was applied in two splits,
2/3
was
applied
during
final
land
apart lines covered by soil manually.
Intercultural operations
Intercultural operations were done
to ensure normal growth of the crop. The
following intercultural operations were
followed:
Irrigation
Three irrigations were applied, the
first irrigation after 18 days of sowing ,
second irrigation after 29 days of sowing
at crown root initiation stage and the third
after 62 days of sowing at heading stage.
preparation and rest 1/3 was applied 20
days after sowing. The fertilizers were
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16
MOP,
Page
The total amount of urea, TSP,
Number of tillers plant-1
Weeding
Weeding was done twice during
Ten plants were selected from each
the whole growing period, the one after 19
plot randomly. The number of effective
days of sowing and the other after 38
and
days.
counted and averaged.
Insect and pest control
Spike length
During maturation, four plots were
non-effective
tillers
recorded and averaged.
was
Grains spike-1
control
by
measures
using
and
Ten spikes were selected and the filled and
application of zinc phosfide.
unfilled grains spike-1 were recorded and
Harvesting
averaged.
The crop was harvested at maturity
Thousand grain weight
after about four months of sowing (March
Thousand grains were randomly
25, 2012). For data collection, ten plants
selected from each plot and the weight of
from each plot were sampled randomly.
grains was recorded after sun drying by
The crop was cut at the ground level.
an electrical balance.
Threshing, cleaning and drying of grain
Grain yield
were done separately for every plot. Then
Grains from each unit plot were
plot- wise weights of grain and straw were
dried and then weighed carefully. The
recorded.
results were expressed as kg ha-1 on 14%
Data collection
moisture basis.
Data were collected on the following yield
Shoot and Root weight
Like grain yield, biomass and dry
and yield components.
weight of shoot and root for individual
The plant height was measured
from the ground level to top of the spike.
plot were recorded and expressed as kg
ha-1.
From each plot, height of 10 plants were
measured and averaged.
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17
Plant height
Page
mechanical
instantly
was
Length of spike of ten plants per plot was
slightly infested by field rat and the pest
controlled
plant-1
Harvest Index
Analysis of soil samples:
I. About 15 percent moisture in grain.
Mechanical analysis: Mechanical analysis
II. Grains in hard dough stage.
was
III. Yellowing of spikelets.
(Buoyoucos, 1927). The textural class was
done
by
determined
SOIL ANALYSIS
hydrometer
following
method
Marshall’s
triangular coordinate using USDA system.
The initial soil sample was analyzed for
both physical and chemical properties
Soil pH: Soil pH was measured with the
such as soil texture, pH, organic matter,
help of a glass electrode pH meter, the
total N and available P, K, S, B, Zn, Ca, Mg
soil-water ratio being 1:2.5 as described by
contents. The post harvest soils were
(Jackson, 1962).
analyzed for soil pH, available P, Ca and
Organic matter content: Organic carbon
Mg.
content of soil was determined following
Collection
and
preparation
of
soil
wet oxidation method (Page et al., 1982).
samples
The
Before land preparation, soil samples were
calculated by multiplying the percent
collected randomly from 9 different spots
organic carbon with the van Bemmelen
of the field from a depth of 0-15 cm. A
factor, 1.73 (Piper, 1950).
was
prepared
was
by
mixing the sub-samples and the weeds,
Total nitrogen: Total N content in soil was
stubbles, stones, etc. were removed from
determined by micro- Kjeldahl method.
the soil. After harvest of wheat crop, the
The soil was digested with 30% H2O2,
soil samples were collected plot wise.
conc. H2SO4 and catalyst mixture (K2O4:
Then the soil samples were air-dried,
CuSO4. 5H2O: Se = 10:1:0.1). Nitrogen in
ground and sieved through a 2-mm (10-
the digest was determined by distillation
mesh) sieve. The sieved soil was stored in
with 40% NaOH followed by titration of
18
sample
of organic matter
a clean plastic container for subsequent
the distillate trapped in H3BO3 with 0.01
Page
composite
amount
mechanical and chemical analysis
N H2SO4.
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Available
Available
phosphorus:
P
NH4OAc, pH 7.0 solution followed by
content was extracted from soil with 0.03
measurement
by atomic absorption
M NH4F – 0.025 M HCl (Bray and Kurtz
spectrometer (AAS).
method). The P in the extract was then
determined by developing blue colour
Statistical analysis
with
SnCl2
phosphomolybdate
measuring
the
reduction
of
The data were analyzed statistically by F-
complex
and
test to examine whether the treatment
colour
by
effects
were
significant.
of
the
The
treatments
mean
spectrophotometer at 660 nm wavelength
comparisons
were
(Page et al, 1982).
evaluated by DMRT (Ducan's Multiple
Range Test). The analysis of variance
Available sulphur: Available S of soil
(ANOVA) for different parameters was
content was determined by extracting soil
done by a computer package programme
sample with CaCl2 (0.15%) solution as
"MSTATC”.
described by (Page et al, 1982). The S
content in the extract was determined
Results and Discussion
turbidimetrically and the turbid was
Soil pH
measured by spectrophotometer at 420 nm
A significant change was found on the
pH values of soil that were collected after
wavelength.
liming at different treatments and it was
Exchangeable potassium: Exchangeable K
increased steadily with the increased rates
content
by
of lime application (Figure 02). The pH
extraction with 1M NH4OAc, pH 7.0
value of before liming were 5.3, 5.2, 5.3,
solution followed by measurement of
5.3, 5.4 and 5.3, which changed to 5.6, 5.5,
extractable
5.6, 5.5, 5.6 and 5.9 in treatment T1, T2, T3,
of
soil
K
was
by
determined
flame
photometer
T4, T5 and T6, respectively, after 30 DAL.
Exchangeable calcium and magnesium:
19
Exchangeable Ca and Mg content of soil
Page
(Jackson, 1962).
was determined by extraction with 1M
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Chemical properties of post harvest soil
Table 1: Effects of liming on changes in soil properties of post harvest soils of
wheat field
These finding was also in agreement with the observation of (Rao et al., 1982). A
significant increase in pH was obtained with lime application and the better pH ranges
were observed with treatment T4 and T5. Similar observations were also reported by
(Basak, 2010; Halim, 2012) that pH of soil steeply increased during the first 30 days after
liming, then slightly increased and finally slightly decreased with time until the end of
120 days of experimentation.
Page
20
Figure 2: Soil pH status before liming and at different days after liming
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Soil Organic Matter
The average soil organic matter content in initial soil and before liming was slightly
lower than soils collected after adding organic matter in the experimental field as per as
necessary on the basis of crop requirement (Table 1 and figure 2). After adding organic
matter to experiment field the status of OM was found to change significantly and
increased up to 60 days, but at 90th, day it was decreased due to application of liming.
The status of OM was increased with the advancement of the time, where the highest
value of OM 2.25 and 1.89 at 30 DAL in respectively T4 and T1 treatments, but at 120
DAL the status was found identical. This was possibly due to the liming affect which
increased pH of the initial acidic soil, as a result the microbial activities of the soil
increased. Possibly due to increased microbial activities soil organic matter was
decreased. But the effect of liming may vary with time and environment condition such
as soil temperature and moisture as reported by Kreutzer (1995). Similar observations
were also reported by (Basak, 2010; Halim, 2012).
Page
21
Figure 3: Soil OM status before liming and at different days after liming
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Available Phosphorus
The application of different rates of lime
They found that phosphours is not mobile
increased the P availability of soils days
in the soil and can result in high
after liming up to harvest of wheat (Figure
concentrations over time. Samia (2007)
4).
available
observed that the status of available P on
phosphorus in the soil was 4.0 μg g-1 soil
soils was positively correlated with the
and days after lime up to the post harvest
rates of lime application. This result
soils had the values of 120th DAL 32.97,
agreed with (Basak, 2010) to find out the
37.40, 51.20, 44.33 and 43.97μg g-1 soils in
pH of initial soil and soil before liming
T1, T2, T3, T4, T5 and T6 respectively. A
was below 6.0. But the pH of soils after
significant effect was found to the change
liming were higher than 6.01, Where Bray
of available P. The status of available P on
and Kurtz’ method was used for P
soils was positively correlated with the
determination, with ammonium fluoride
rates of lime application. Lime application
(NH4F) as extracting solution.
The
initial
value
of
increased the soil pH which helped the
release of fixed P from the oxides and
The pH of soils that were collected after
hydroxides of Fe and Al thus increased the
liming was greater than 6.0 where Olsen’s
P availability in soil.
method were used for P determination
with sodium hydrogen carbonate solution
In general soil pH should be maintained
as
6.0 to 7.5 to maximize plant available
fluoride extract more P even bound and
phosphorus.
higher
fixed phosphorus form soil compared with
concentration of P was due to the
sodium hydrogen carbonate solution. So,
application of phosphate fertilizer in acidic
in lower pH the availability of P was
soil over time because P is not mobile. This
slightly high than higher pH in the study
result agreed with the report of (Samia,
area.
the
solution.
Ammonium
22
Possibly
extracting
Page
2007).
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Figure 4: Soil P status before liming and at different days after liming.
Available Calcium
soil after liming. The status of available Ca
Available calcium in the sample that was
on soils was positively correlated with the
collected days after liming increased
rate
steadily with increase rates of lime
application of lime increased the soil pH,
application, but it decreased in treatment
which increased available Ca in soil. The
T5 and T6. The available Ca of the soil
co-efficient of variation was 6.37% and
before liming was 2.22, 2.72, 2.6, 2.34 and
that of LSD was 0.019 at 1% level of
2.47 meq 100g soil-1 respectively. After
significant. Which means a significant
30th DAL that became 1.78, 2.05, 2.26, 2.46,
increased of Ca (2.46 meq 100g soil-1) was
2.21 and 2.05 with T1, T2, T3, T4, T5 and
obtained with lime application and the
T6 treatments respectively. The result was
better concentration of Ca was observed
found that the decreasing trend after 30th
2.46 in respect of treatment T4. This result
DAL was found upto 120DAL (Table 1
agreed to report of (Garica, 1975) that the
and Figure 6). The liming material used as
pH of acid soils increases due to liming,
Dolochun [Dolomite, CaMg(CO3)2], which
and adsorption is higher with higher rate
on dissolution released a large amount of
of
Ca and thus the available Ca increased in
deficiencies are ameliorated.
lime
application,
application
and
because
calcium
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23
lime
Page
of
Figure 5: Soil Ca status before liming and at different days after liming
Available Magnesium
7). The liming material used as Dolochun
Magnesium availability in soil samples
[Dolomite,
collected during experiment was increased
dissolution released a large amount of Mg
just after liming at 30th DAL, but it was
that increased the pH of soils. The co-
gradually decreased with different rate of
efficient of variation was 9.16 and LSD
lime application up to 120th DAL. The
was 0.327.
content of available Mg in soil of sample
increase of Mg was obtained with lime
collected before liming was
0.52, 0.56,
application and the highest lime rate was
0.55, 0.69, 0.59 and 0.56 meq 100g soil-1
more effective than lower rate. The highest
which changed after 30th DAL to 0.09,
value was found 1.61 in respect of
1.24, 1.54, 1.56, 1.61 and 1.55 meq 100g
treatment T5. This finding was also in
soil-1 in T1, T2, T3, T4, T5 and T6
consonance with the finding of Garcia
treatment respectively (Table 1 and Figure
(1975). Similar observations were also
CaMg(CO3)2],
which
on
Page
reported by (Miller, 2000).
24
Which means a significant
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Figure 6: Soil Mg status before liming and at different days after liming
Available Potassium
observations
The application of different rate of lime
(Jackson, 1962) and (Basak, 2010) that the
increased the K availability of soils at after
supply of exchangeable potassium in the
30th days after liming, but it decreased
soil is often low in acid soils, due to the
gradually up to the 120th days after
formation of soluble K salt by soil acids
liming. The result showed that numerical
and their loss by leaching from the soil.
different but level of lettering were
The availability of K begins to fall below a
identical. The CV was 15.35 and that of
pH of 6.0. This finding was also in
LSD was 0.0818 which was not significant
consonance with the finding of (Basak,
(Table 1 and Figure
2010)
found
that
concentration of available K was obtained
promotes
with treatment T4 (1.5 t ha-1). Similar
availability to plant.
reported
liming
demotes
acid
by
soils
potassium
Page
and
also
25
8). But better
were
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Figure 7: Soil K status before liming and at different days after liming
Summary and conclusion
The
experiment
was laid out
4.9 which increased to more than 6.0 due
in a
to the application of more than 1.5 t lime
randomized complete block design with
ha-1. The application of different rates of
three replications. The size of the unit plot
lime
was 2.5m x 4m. Soil of the experimental
availability of the soils of different lime
field was sandy loam having initial pH 4.9,
treatments after harvest of wheat.
organic matter 1.92%, total N 0.12%,
available Mg of the initial soil was 0.98
available P 4.0 µg g-1, K 0.04 meq 100 g-1,
meq 100 g-1 soil which increased to 1.61
available Ca 3.5 meq 100 g-1, Mg 0.98 meq
meq 100 g-1 due to application of 2.0 t lime
100 g-1 and S 12.00 µg g-1. Post harvest soil
ha-1 at 30 DAL. Similarly, the available Ca
samples (120th DAL) were analyzed for
of the initial soil was 1.5 meq 100 g-1 soil
pH, OM, available P, K, Ca and Mg.
which rose to 2.46 meq 100 g-1 soil due to
increased
the
P,
Ca
and
Mg
The
application of 1.5 t lime ha-1 at 30 DAL.
The results from this experiment showed
steadily with increase in rates of lime
that
application. The pH of the initial soil was
cultivation in the Amnura soil series of
liming
is
necessary
for
wheat
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Page
different treatments of wheat increased
26
Soil pH of the post harvest soils in
Sapahar Upazila of Naogaon District. The
application of lime to soil increased soil
pH, available P, Ca and Mg in soils which
had positive impact on yield components
resulted in higher
yield of wheat. The
application of 1.5 t lime ha-1 appears to be
optimum for wheat cultivation in the
study area. However, further research
may be carried out on the effects of lime
on yield bearing characteristics of wheat
for a sustainable food production.
Conflict of Interest:
Page
27
There is no Conflict of Interest.
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