Papers

YIELDING ABILITY OF AROMATIC RICE UNDER STACKING AND NON-STACKING CONDITIONS WITH DIFFERENT NITROGEN FERTILIZATION (Pages : 1 - 5)

K. M. S. HAQUE, Q. A. KHALIQ, J. AKTAR and A. M. SHAMSUDDULA

A field experiment was conducted to study the effect of nitrogen fertilizer on yielding ability of indigenous aromatic rice cultivars under stacking and non-stacking conditions. Rice cultivars were grown during Aman season, 2002. There were four cultivars, namely, Shakkorkhora, Chinigura, Kalijira and Kataribhog, each with three levels of nitrogen fertilizer (0, 60 and 120 kg N ha-1). At the time of heading the experimental plots were equally divided into two parts. The crop in the half of the plot was left on the fate of the nature and that in the other half of the plot was mechanically supported by stacking to prevent lodging. Under stacking condition with the application of 60 Kg N ha-1 the grain yields increased by 12%, 23%, 29% and 18% in Shakkorkhora, Chinigura, Kalijira and Kataribhog, respectively compared to control. With stacking yield was increased by 0.6% in Shakkorkhora, 25% in Chinigura, 18% in Kalijira and 11% in Kataribhog at 60 kg N ha-1 and by 18% in Shakkorkhora, 27% in Chinigura, 35% in Kalijira and 80% in Kataribhog at 120 kg N ha-1. The grain yield increase under stacking condition was supported by the increase in the number of filled spikelets per panicle, 1000-grain weight and decrease in sterility. Under stacking condition even at high level of nitrogen (120 kg N ha-1) the number of filled grain per panicle and 1000-grain weight increased remarkably. The highest grain yield was observed in plants with 60 kg N ha-1 under non-stacking condition. Stacking increased grain yield remarkably. Kataribhog with 120 kg N ha-1 produced 3.7 t ha-1 grain yield when provided artificial stacking, which was 2 t ha-1 under non-stacking condition. Under stacking condition, the cultivars Shakkorkhora, Kalijira and Kataribhog showed their highest yielding ability at 120 kg N ha-1.Download


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