Effect of time of planting and nitrogen levels on yield and yield components of sail rice

摘要

An experiment was conducted during 1992 and 1993 to study the effects of staggered planting and N levels on yield and yield components of sail (lowland winter) rice, Delayed planting on 15 September of 55 days old seedlings recorded comparable yield (3.11 ha~(-1)) in 1992 and significantly higher yield (4.51 ha~(-1)) in 1993 than normal planting (25 August) of 35 days old seedlings when N was applied at 60 kg ha~(-1). 60 kg ha~(-1) N increased panicle number markedly in 1992, significantly in 1993 and increased grains panicle~(-1) substantially. Significantly lesser grain yield in case of delayed planting (25 September) of 65 days old seedlings was associated with significantly lesser thousand grain weight and considerable decrease of filled grainspanicle~(-1).