Effect of Irrigation Regimes and Nitrogen Management Practices on Uptake of Nutrients and Grain Yield in Hybrid Rice (Oryza sativa L.)

摘要

A field experiment was conducted with hybrid rice variety (ADTRH,) under three irrigation regimes and five nitrogen management practices during the kharif season of 1999 and 2000. On the basis of two years result, the highest DMP, N, P, K uptake and grain yield were associated with irrigation to 5 cm depth on the day of disappearance of ponded water which were comparable to irrigation one day after disappearance of ponded water. Among the N management practices application of recommended dose of nitrogen at the rate of 17, 33, 33 and 17% at 7 days after transplanting (DAT), 21 DAT, panicle initiation and first flowering along with 6.25 t of green manure recorded significantly higher DMP, N, P, K uptake and grain yield.