Effects of herbicides and biofertilizer
59. Jahrestagung der
Gesellschaft für Pflanzenbauwissenschaften e. V.
27. bis 29. September 2016
Gießen
Klimawandel und Qualität
Kurzfassungen der Vorträge und Poster
Herausgeber:
H. Kage, K. Sieling
und L. Francke-Weltmann
Gesellschaft für Pflanzenbauwissenschaften e. V.
Verlag Liddy Halm
Göttingen 2016
Mitt. Ges. Pflanzenbauwiss. 28: 220–221 (2016)
Effects of herbicides and biofertilizer (Bradyrhizobium japonicum)
on weed control and soybean yield
Yazdan Vaziritabar, Yavar Vaziritabar, Bernd Honermeier1, Farzad Paknejad2
and Javad Angaji3
1
Justus-Liebig-University Giessen, Institute of Agronomy and Plant Breeding I, BFS (Biomedical
Research Centre Seltersberg), Schubertstr. 81, D-35392 Giessen, Germany.
2
Department of Agronomy, Karaj Branch, Islamic Azad University, Karaj, Iran.
3
Department of Agronomy, Science and Research Branch of Tehran, Islamic Azad University, Tehran,
Iran. E-Mail: yazdan.vaziritabar@agrar.uni-giessen.de
Introduction
Soybean (Glycine max. (L.) Merr.) is cultivated in Iran on around 70.000 ha reaching
grain yields of about 2.4 t/ha. Because of low competition capacity during the juvenile
development stage soybean plant stand can be characterized as sensitive to weed
infestation. Weeds compete for water and nutrient uptake that may inhibit the growth
and development of the soybean crop. That may modify the soybean canopy like
plant height and number of sub branches and finally reduce the grain yields. Two of
the most important weeds on soybean fields in Iran are Xanthium strumarium L. and
Datura stramonium L. which can decrease soybean yield by around 70%. Beside
weed control the N2 fixation is crucial for soybean growth and development as well.
The aim of this research was to investigate the interaction of selected herbicides
used in soybean in Iran and bio-fertilizer (Bradyrhizobium japonicum) on weed
control and grain yield in soybean plant stand.
Material and method
The field experiment was conducted in 2012 as randomized complete block design
(RCBD) arrangement on fields of the research station belonging to the Faculty of
Agriculture of the Islamic Azad University in Karaj, Iran. The station (50°57´E,
35°34´N, altitude 1261 m) is characterized by an annual mean air temperature of
16.2°C and mean precipitation of 260 mm per year for the past 30 years. Two factors
(1) the application of bio-fertilizer (with and without) and (2) application of herbicides
including control (weedy check) were arranged as main treatment. The herbicides as
sub-treatments consisted of trifluralin, ethalfluralin, metribuzine, oxyflorfen, bentazon,
and aciflourfen+bentazon. Weed density and biomass were determined by using
quadrates 0.5 m2 in two points of each plot randomly, which declares total weeds of
the plot.
Results and discussion
The weed species Xanthium strumarium and Datura stramonium have been
identified as the most frequently weeds observed in control plots of the field
experiment (fig 1). All applied herbicides except metribuzine significantly reduced the
biomass of those weeds (Xanthium strumarium and Datura stramonium) compared to
the control. Bentazon (91.1%) and aciflourfen plus bentazon (99.2%) led to strong
and significant reduction of the weed biomass (fig. 1).
Postersektion 4: Leguminosen
Xanthium spinosom
Biomass (g/m2)
221
9
8
7
6
5
4
3
2
1
0
b
ab
a
a
a
a
a
Datura stramonium
Biomass (g/m2)
1)
45
40
35
30
25
20
15
10
5
0
b
a
a
a
a
a
a
Soybean Grain Yield
(kg ha-1)
2)
1200
1000
800
600
400
200
0
Application of Biofertilizer
Non-Application of Biofertilizer
ab ab
ab ab
b
ab
a a
ab ab
b ab
b
b
3)
Fig. 1: Effect of different herbicides and bio-fertilizer on weed control and grain
yield in soybean in a field experiment, Karaj 2012 (Iran)
Caused by effective weed control the herbicides aciflourfen plus bentazon led to
highest grain yield of soybean with significant difference to the control (fig. 1).
Conversely, metribuzine and oxyflorfen had a limited effect caused by weak control
of Xanthium spinosum. The used bio-fertilizer Bradyrhizobium japonicum had no
clear influence on the soybean plant stand and grain yield.
The current data confirm the importance of the use of suitable and selective
herbicides in cultivation of soybean plants to protect them against weed infestation.
In the present study no advantage of bio-fertilizer regarding soybean growth could be
found. It is suggested that the population of naturally occuring soil rhizobia is
sufficient for necessary symbiosis with soybean host crop.
Postersektion 4: Leguminosen
Gesellschaft für Pflanzenbauwissenschaften e. V.
27. bis 29. September 2016
Gießen
Klimawandel und Qualität
Kurzfassungen der Vorträge und Poster
Herausgeber:
H. Kage, K. Sieling
und L. Francke-Weltmann
Gesellschaft für Pflanzenbauwissenschaften e. V.
Verlag Liddy Halm
Göttingen 2016
Mitt. Ges. Pflanzenbauwiss. 28: 220–221 (2016)
Effects of herbicides and biofertilizer (Bradyrhizobium japonicum)
on weed control and soybean yield
Yazdan Vaziritabar, Yavar Vaziritabar, Bernd Honermeier1, Farzad Paknejad2
and Javad Angaji3
1
Justus-Liebig-University Giessen, Institute of Agronomy and Plant Breeding I, BFS (Biomedical
Research Centre Seltersberg), Schubertstr. 81, D-35392 Giessen, Germany.
2
Department of Agronomy, Karaj Branch, Islamic Azad University, Karaj, Iran.
3
Department of Agronomy, Science and Research Branch of Tehran, Islamic Azad University, Tehran,
Iran. E-Mail: yazdan.vaziritabar@agrar.uni-giessen.de
Introduction
Soybean (Glycine max. (L.) Merr.) is cultivated in Iran on around 70.000 ha reaching
grain yields of about 2.4 t/ha. Because of low competition capacity during the juvenile
development stage soybean plant stand can be characterized as sensitive to weed
infestation. Weeds compete for water and nutrient uptake that may inhibit the growth
and development of the soybean crop. That may modify the soybean canopy like
plant height and number of sub branches and finally reduce the grain yields. Two of
the most important weeds on soybean fields in Iran are Xanthium strumarium L. and
Datura stramonium L. which can decrease soybean yield by around 70%. Beside
weed control the N2 fixation is crucial for soybean growth and development as well.
The aim of this research was to investigate the interaction of selected herbicides
used in soybean in Iran and bio-fertilizer (Bradyrhizobium japonicum) on weed
control and grain yield in soybean plant stand.
Material and method
The field experiment was conducted in 2012 as randomized complete block design
(RCBD) arrangement on fields of the research station belonging to the Faculty of
Agriculture of the Islamic Azad University in Karaj, Iran. The station (50°57´E,
35°34´N, altitude 1261 m) is characterized by an annual mean air temperature of
16.2°C and mean precipitation of 260 mm per year for the past 30 years. Two factors
(1) the application of bio-fertilizer (with and without) and (2) application of herbicides
including control (weedy check) were arranged as main treatment. The herbicides as
sub-treatments consisted of trifluralin, ethalfluralin, metribuzine, oxyflorfen, bentazon,
and aciflourfen+bentazon. Weed density and biomass were determined by using
quadrates 0.5 m2 in two points of each plot randomly, which declares total weeds of
the plot.
Results and discussion
The weed species Xanthium strumarium and Datura stramonium have been
identified as the most frequently weeds observed in control plots of the field
experiment (fig 1). All applied herbicides except metribuzine significantly reduced the
biomass of those weeds (Xanthium strumarium and Datura stramonium) compared to
the control. Bentazon (91.1%) and aciflourfen plus bentazon (99.2%) led to strong
and significant reduction of the weed biomass (fig. 1).
Postersektion 4: Leguminosen
Xanthium spinosom
Biomass (g/m2)
221
9
8
7
6
5
4
3
2
1
0
b
ab
a
a
a
a
a
Datura stramonium
Biomass (g/m2)
1)
45
40
35
30
25
20
15
10
5
0
b
a
a
a
a
a
a
Soybean Grain Yield
(kg ha-1)
2)
1200
1000
800
600
400
200
0
Application of Biofertilizer
Non-Application of Biofertilizer
ab ab
ab ab
b
ab
a a
ab ab
b ab
b
b
3)
Fig. 1: Effect of different herbicides and bio-fertilizer on weed control and grain
yield in soybean in a field experiment, Karaj 2012 (Iran)
Caused by effective weed control the herbicides aciflourfen plus bentazon led to
highest grain yield of soybean with significant difference to the control (fig. 1).
Conversely, metribuzine and oxyflorfen had a limited effect caused by weak control
of Xanthium spinosum. The used bio-fertilizer Bradyrhizobium japonicum had no
clear influence on the soybean plant stand and grain yield.
The current data confirm the importance of the use of suitable and selective
herbicides in cultivation of soybean plants to protect them against weed infestation.
In the present study no advantage of bio-fertilizer regarding soybean growth could be
found. It is suggested that the population of naturally occuring soil rhizobia is
sufficient for necessary symbiosis with soybean host crop.
Postersektion 4: Leguminosen