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Effect of nitrogen levels and mulching materials on
productivity of rice.
Bhatta, G. D., K. B. Basnet, K. R. Dahal and D. N. Yadav. 2007. IAAS Research
Advances Vol. 2. Institute of Agriculture and Animal Sciences, Rampur,
Chitwan,
Nepal. pp.
21-25.
Keywords: Mulching materials,
Cassia tora, Ipomoea fistulosa,
sterility
A field experiment was initiated during rainy season of 2002 at IAAS, Rampur to study the effect
of nitrogen levels and mulching materials on productivity of rice under
Randomized Complete Block Design with four replications and 10 treatments in
humid subtropical condition of Chitwan valley. The treatment consists of three
levels (0, 50 and 100 kg/ha) of nitrogen without mulch, combination of 50 and
100 kg with two levels (1.5 and 3 t/ha) of wheat straw, combination of two
levels (50 and 100 kg/ha) of nitrogen with 3 mt/ha of
Cassia tora and 50 kg nitrogen with 3
mt/ha of Ipomoea fistulosa. A marked
increment in the yield attributing characters except panicle weight and number
of grains per panicle was observed with application of 100 kg N/ha over control.
The grain yield with this treatment was significantly higher (3.00 mt/ha) than
control (2.38 mt/ha). Significantly higher grain yield (3.61 mt/ha) was obtained
by superimposing 3 mt/ha of wheat straw mulch with 100 kg N/ha. All of the yield
contributing characters were outstripped by the conjoint use of 3 mt/ha of wheat
straw mulch and 100 kg N/ha. Application of mulching materials with 50 kg N/ha
being statistically at par led to the increased yield over 50 kg N/ha alone. The
significant response of wheat straw mulching was conspicuously seen only when
applied @ 3 mt/ha with 100 kg N/ha. |
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