Effect of integrated nutrient supply and management on yield of rice (Oryza sativa) and nitrogen and phosphorus recovery by it in acid lateritic solis Chakraborty A., Chakraborty P.K.1, Banik P.2, Bagchi D.K.3 Regional Research Substation, Bidhan Chandra Krishi Viswavidyalya, Sekhampur, West Bengal, 731129 1 Present address: Department of Agricultural, Meteorology, BCKV, Mohanpur, Nadia, West Bengal 741252
2 Biological Sciences Division, Agricultural Science Unit, Indian Statistical Institute, B.T. Road, Calcutta, West Bengal
3 Biological Sciences Division, Agricultural Science Unit, Indian Statistical Institute, B.T. Road, Calcutta, West Bengal
Abstract A field experiment was conducted during the rainy (kharif) seasons of 1996 and 1997 on rice (Oryza sativa L.) in acid lateritic soil of Sekhampore, Birbhum district, West Bengal. Highest green and dry matter of Sebania aculeata (SA) was obtained with the application of single superphosphate (SSP) @ 30 kg P/ha as also the N and P content in dry matter. Grain and straw yields, N uptake and P recovery of rice were highest when S. aculeata was grown and incorporated followed by fertilizer application @ 30, 15 and 15 kg N,P, and K/ha as basal dose to rice. Uptake of P in rice and agronomic efficiency of N were maximum when S. aculeata was fertilized with single superphosphate @ 30 kg P/ha and was incorporated prior to rice transplantation. The agronomic efficiency of P was higher with fertilizers applied @ 30, 15 and 15 kg N,P and K/ha to rice after S. aculeata incorporation. Top Keywords Sesbania, Rice, Apparent recovery, Agronomic efficiency. Top |