Effect of soil enrichment in conjunction with organics and chemical fertilizer on rice (Oryza sativa)-chickpea (Cicer arietinum) cropping system
1999
Singh, A.P. | Mittra, B.N. | Tripathi, R.S.(Indira Gandhi Agricultural University, Madhya Pradesh(India). Dept. of Agronomy)
A field experiment was undertaken at Raipur (M.P.) during wet and dry seasons of 1993-94 and 1994-95 to study the direct effect of urea-N with or whithout organic materials (paddy straw, farmyard manure and green manure) on productivity of rice (Oryza sativa L.) and its residual effect on yield of chickpea (Cicer arietinum L.) grown after rice under rainfed low land vertisol. Application of fertilized green manure as Sesbania rostrata proved superior as compared to paddy straw and farmyard manure. Rice yield and N-uptake were significantly higher under combined application of green amnure and urea on an equivalent N basis. Thus, urea-N can be substituted up to 50% by applying Sesbania rostrata in rice. Residual fertility in terms of organic carbon was pronounced under farmyard manure and paddy straw which reflected in terms of higher grain yield of chickpea grown after harvest of wet season rice. Direct application of N up to the recommended level (20 kg N/ha) increased the grain yield of chickpea considerably. However, N-use efficiency decreased with the increasing levels of N from 0 to 20 kg N/ha.
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