Vol. 1 No. 1
Studies on growth of rice and greengram in intercropping, as influenced by nitrogen levels in rice, during rainy season of West Bengal A. P. Patra
Author(s): A. P. PATRA
Abstract: An intercropping experiment of direct- seeded rice (cv. MW-10) and green gram (cv.B-105) was conducted at the University farm, Nadia, West Bengal, India during kharlf season of 2000 and 2001 in randomized block design (RBD) with replications. Treatments comprised of three lovels of N (0, 30 and 60 kg/ha) in rice and two intercropping arrangements (2R : 2G and 4R : 2G). Canopy of rice, at 50 and 75 DAS, was taller In lntercrropplng than Ir sole cropping at 0 kg N/ha. In intercropping, canopy height of rice increased, and that of greengram decreased with Increasing levels of Nin rice. The leaf and shoot dry matter of intercroppeq rice, at 75 DAS, were 58-61 and 54- 58% in 2 : 2, and 80-87 and 75-82% (of sole crops) in 4: 2 rows, respectively. The leaf and shoot dry matter of greengram at 50 DAS, were 65-79 and 71-?9% m 2 : 2 and 50-57% and 49- 55% (of sole crops} in 4: 2 rows, respectively. In intercropping, the CGR of rice and gramgram were 9.01 and 3.38 g/m2/day in 4: 2 rows at 60 kgN/ha In ri~, and 4.06 and 5.72 g/m /day m 2:2 rows without N in rice, respectively. The CGR of rice Increased, and that of greengram decreased with increasing levels of N in rice. The CGR of rice was higher and that of greengram lower m 4.2 than in 2 : 2 arrangement. Total biomass In intercropping was always higher than sole greengram, but higher than sole rice, only when N was not applied.
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