Abstract:
The study was performed at Shcr-e-Bangla Agricultural University (SAU) Farm
on integrated use of fertilizers and manure in T. Aman rice (Var. BRRI dhan 33) during
July to
Nov. 2007.
A Field experiment was conducted in combination with inorganic
fertilizers and manure. The experiment was laid out in a randomized complete block
design with eight treatments and four replications. The treatments were To (control), TL(
K45S20 (Recommended dose), T
2
(50% NPKS + St ha 'CD), T3(70% NPKS + 3
t ha4 CD ). T
4
(50% NPKS + 4
t hi' PM ), T
5(70% NPKS +
2.4 t hi' PM ), T
6(50%
NPKS + 10 1
hi' DH) and T7(70% NPKS + 6
It ha4 Dl-!). The result demonstrated that
N
1
P
15
the yield contributing characters, grain and straw yields were significantly influenced
by the added fertilizers and manure. Application of 50% of
NPKS fertilizers plus 10
1
ha' dhaincha produced the highest grain yield
(5085 kg hi') which was identical to
that obtained with
70%
of NPKS with 6 t ha4 dhaincha. In case of straw yield, the
treatment 1'7
(70% NPKS +
6
t hi' DH) produced the highest yield
(5470 kg hi') and
the second highest straw yield
(5250
kg hi') was obtained from i'6
(50% NPKS + 10
hi' DH) treatment. The grain yield increases over control and ranges between 15 to
76%.
The treatments T
6 and T
7 resulted in higher nutrient use efficiency along with
higher
N.
P. K and S uptake by the T. Aman rice. The application of inorganic fertilizer
with manure influenced the nutrient concentration in rice grain and straw. The higher
grain N, P, K
and S concentrations were observed in the treatments where poultiy
manure and dhaincha were applied in combination with N P K fertilizers. Grain yield
of T. Aman rice was positively correlated with number of effective tiller, plant height,
panicle length, filled grains panicle' and straw yield. The combined use of fertilizer
and manure resulted in considerable improvement in soil fertility. The combined
application of fertilizer and manure increased the % OC, total N, available P and
available S in post harvest soils. The overall findings of this study indicate that the
integrated use of fertilizer and manure should be encouraged to address the
deteriorating soil fertility and increased crop yield of T. Aman rice.
