Production potential of rice (Oryza sativa) crop as influenced by residual effects of integrated nutrient management treatments under wheat (Triticum aestivum) - rice cropping system

Suman Mehta; Anil Kumar; Thakur, N.P.

Environment and Ecology 22(2): 386-389

2004


ISSN/ISBN: 0970-0420
Accession: 004284323

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Abstract
An experiment was conducted in Jammu and Kashmir, India, during winter 2001-02 and kharif 2003 to study the production potential of rice (O. sativa) crop as influenced by residual effects of integrated nutrient management treatments which were imposed in the preceding wheat (T. aestivum) crop. Treatments comprised: 3 inorganic fertilizer rates (50, 100 and 150% of the recommended NPK rate (100:50:40 kg NPK/ha)) and 5 organic sources (5 t farmyard manure (FYM)/ha, Leucaena biomass (Ls), paddy straw (Ps), 2.5 t FYM/ha + Ls, and 2.5 t FYM/ha + Ps). Application of 100 or 150% of the recommended NPK rate in combination with FYM or Ls, and FYM + Ps, and 100% of the recommended NPK rate with Ps significantly increased the effective tillers, grain and straw yields of the succeeding rice crop. The residual effect of Ls + 100% of the recommended NPK rate recorded the highest gross and net monetary returns.