Perubahan Beberapa Sifat Fisik Tanah dan Pertumbuhan Tanaman Kedelai (Glycine Max L. Merril) akibat Pemberian Kapur dan Bahan Bumat dari Air Gambut pada Tanah Latosol

PERUBAHAN BEBERAPA SIFAT FISIK TANAH DAN
PERTUMBUHAN TANAWIAN KEDELAI (Glycine Mclx L. Merril)
AKIBAT PEMBERIAN KAPUR DAN BAHAN HUMAT DARl AIR
GAMBUT PADA TANAH LATOSOL

OIeli :
DIAN YUNIA LESTARI
A.04405045

PROGRAM STUD1 ILNIU TANAH S - 1
JURUSAN TANAH
FAKULTAS PERTANIAN
INSTITUT PERTANIAN BOGOR
2000

A l l a h memberikan nikmat kepada s i a p a yang dikehendakiNya
Dan b a r a n g s i a p a yang d i b e r i hikmah,
sungguh t e l a h d i b e r i k e b a j i k a n yang b a n y a k .
Dan t i d a k a d a yang d a p a t mengambil p e l a j a r a n k e c u a l i
o r a n g o r a n g yang b e r a k a l
( Q . S . A 1 Baqarah : 2 6 9 )

I dedicate t h i s ;
For my p a r e n t s , my l o v e l y s i s t e r s a n d b r o t h e r
( K i k i , D i n i , A r i f a n d ' p u j i ) a l s o t o someone s p e c i a l
(who always i n m y h e a r t ) and a l w a y s s u p p o r t me,
Thanks f o r y o u r l o v e a n d I Love You A l l

SUMMARY
Dian Yunia Lestari. T h e Effect of lime and humic substance appliyhtion on soil
physical properties and growth of soya bean ( Glycitzr mcrx L.Merr) a t Latosol.
(Supervised by Divi 1.' Tejo Baslcoro and M. Dasun EIerudjito).
The purpose of this study is to see the effect of lime and h ~ ~ r n substance
ic
application on: 1) soil aggregate stability, soil water characteristic (water content at
pF1, pF2, pF2.54 and pF4.2),

2) Water movement on ~ ~ n s a t ~ ~ r soil,
a t e d such as

advance of wetting front, soil conductivity and difusivity, ztnd 3) the growth of soya

be2un.
This stutly was conducted on March 1999 ~ ~ n tJanuary
il
2000 at soil physic
laboratory of IPB and Puslittanak for soil physical characteristic measurement ant1
green house of IPB baranang siang for crop growtli experi~nent.Soil sample usecl in
this study is Latosol and Iiumic substance ~ ~ s were
e d obtained from peat soil from the
area of PT.SAC Nusantara Mesuji.
The experiment was designed using co~npletelyRandon~izeclDesign with two
repetition. Four level of huniic substance (O%, 1%, 2% and 3%) and two level of lime
(0% and O.jX.4-dd) application were exanlinecl in this study.
R e s ~ ~of
l t the experiment shows that application of lime and h ~ ~ ms~~bstance
ic
have no significant effect on aggregate stability. The trend of data shows, Inowevcr,
that soil aggregate stability sligthly increase with the increasing of litme ant1 h~111iic
substance level.
Application of lime and humic substance have no significant effect on soil
water content at pF1, pF2, pF2.54 but have significant effect on soil water pF 4.2.

Since soil sample used in low suction (pF 1, pF2, pF2.54) were undistrubed soil
sample whereas in high suction (pF4.2) were used distrubed soil sample. This result
suggest that the increase of soil water retention due to the increase of lime and humic
s~ibstanceis more textural character~sticinfluenced than soil structural characteristic.
Application of lime and humic substance can also significantly inhibit the
advance of wetting front, and significantly decrease of conductivity and difusivity on
unsaturated soil. This result indicate that hulnic substance used are hydrophobic. The
decrease of the advance of wetting fiont is also influenced by the time of
measurement.
Result of this study shows that lime and humic substance applicatior~have
significant effect on crop heigth only on 3 and 4 week after sowing. The effect

011

the

number of leaf significant only on 1 and 2 week after sowing. The effcct of those
application on crop dry weigth, however, is not significant.

RINGKASAN
DIAN YUNiA

LESTARI.

Perubnhan Bebernpn Sifnt Fisilc T a o i i l i

tlali

P e r t u r i l b u l i a l ~Tiiriil~iiii~i
Iwi
i
1'.

Te,jo B ~ S I ~ Odari
~ Of-I.
, D. t l e r l ~ t l j i t o )
Peneltt~andtlakukan dengan tujuan

L I ~ ~ L 1)

I ~

melthat pengaluh kapur (Ian

bahan Iiuinat tet-liadap lttdeks Stabilitas Agregat, kadar air pada tegangan niatrilis
pF1, pF2, pF2.54 daii pF 4.2 , 2) melihat pengaruli kapur dan bahali iiuniat tel-liadap
pel-get-akan air pada raiiali titlak j e ~ i ~ ~yaitu
l i , jal-ak bidang pembasahan, tlifitsivitas (la11
I ~ e l l t a r a ~tiidl-ulik
i
clan 3) melihat penyal-~ili k a p ~ t r clan bahan Ii~tniat tet-hatlap
tanaman, junilali tlaun dan bobot lteririg talialiieti
pel-tu~nbuliantanamall y a i t ~tir~ggi
~
(protluksi tanatiiali).
Pelielitiari m ~ l l a idilakukan pada buian fvlal-et 1990 sampai .lanual-i 2000
I'etlelitian dilakuliati tli labot-atori~ttiiFisika tian Koliservasi Taliah clan A i r 11'13 LII~~III<
nlenganalisis sifat fisik tanali ( lndeks Stabilitas Agregat, l