Effect of Culm Cutting Height and Nitrogenous Fertilizer on the Yield of Ratoon of Late Boro Rice

摘要

In ratoon, crop cutting height of culm at above 15 cm was found to be favourable for plant attributes especially 1000 grains weight, grain yield and straw yield. On the other hand, 120 kg N ha^-1 noticed for the tallest plant, the highest bearing tillers hill^-1, sterile spikelets panicle^-1, 1000 grains weight, grain yield and straw yield. In treatment combination of 15 cm culm cutting height of culm and 120 kg N ha^-1 was found to produce also the highest grain yield . The highest grain yield (1.56 t ha^-1) resulted from ratoon crop was 25.16% of the primary crop. The yield and most of the other plant attributes were lower and field duration was also shorter in ratoon crop than those of the primary crop.