Integrated nutrient management for sustainability of rice (Oryza sativa) -wheat (Triticum aestivum) cropping system

Sharma, S.K.; Sharma, S.N.

Indian Journal of Agricultural Sciences 72(10): 573-576


ISSN/ISBN: 0019-5022
Accession: 070560143

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A field study was conducted during 1995-96 and 1996-97 at New Delhi, on a sandy clay loam soil to study the effect of integrated nutrient management on sustainability of rice (Oryza sativa)-wheat (Triticum aestivum L. emend. Fiori & Paol.) cropping system. Although combinations of NP, NK and NPK significantly increased P and K content of soil over N alone by 2.5-5.7 kg/ha and 3-19 kg/ha, respectively, it had no significant effect on the productivity of rice-wheat cropping system. On the other hand combination of NPK + frameyard manure increased grain yield of rice-wheat system by 1.2-1.3 tonnes/ha, stray yield of 0.7-2.3 tonnes/ha, N uptake by 38-45 kg/ha, P uptake by 7-10 kg/ha, K uptake by 25-42 kg/ha, organic C content of soil by 0.09-0.15%, available N by 6-24 kg/ha, available P by 7-8 kg/ha and available K by 7-32 kg/ha over N alone. The increase in above parameters with NPK + FYM was higher in second year of study, indicating for sustainability of rice-wheat cropping system.