Effect of integrated nutrient management in rice (Oryza sativa) - wheat (Triticum aestivum) cropping system in Western Maharashtra

Gholve, S.G.; Kamble, S.K.; Shinde, S.N.

Biofertilizers technology: 187-192


Accession: 004420633

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A field experiment was conducted in medium deep black soil at Agricultural Research Station, Vadgaon Maval, Maharashtra, India during 1998-1999 and 1999-2000 to investigate the effect of integrated nutrient management in rice-wheat cropping system. The experiment comprised three combination of integrated nutrient management for rice (cv. Pawana): (i) 100% recommended dose (RD) of N; (ii) 50% RD of N + 10 t gliricidia/ha; (iii) 75% RD of N+20 kg BGA (blue green algae) cultures/ha and three nitrogen levels for wheat (cv. HD 2189) viz., 100, 100 and 125% RD. The recommended dose of fertilizer for both crops was 100, 50 and 50 kg N, P and K/ha, wherein N dose was applied as per treatments and P, K applied uniformly as a basal dose in both crops. Application of 50% RD of N+10 tonnes of gliricidia/ha showed the highest paddy yield (51.19 q/ha) which indicated the possibility of substituting 50% N of paddy crop through gliricidia green manuring at 10 tonnes/ha. Similarly, the yield obtained due to application of 75% RD of N+20 kg BGA/ha was statistically equal to that of 100% RD of N thereby indicating the efficient role of BGA for substitution of nitrogen N up to 25%. While in succeeding wheat crop N level responded upto 100% RD of N. This was also confirmed by the assessment of the system in terms of monetary returns.