Papers

EFFECTS OF WATER STRESS ON GROWTH AND YIELD ATTRIBUTES OF AMAN RICE GENOTYPES (Pages : 25 - 30)

M. A. ZUBAER, A. K. M. M. B. CHOWDHURY, M. Z. ISLAM, T. AHMED AND M. A.HASAN

Transplant aman rice suffers from moisture stress as ceases the reproductive stages in Bangladesh, which contributes to lower the yield of this crop. To identify drought tolerant rice variety, a pot experiment with three T. aman rice genotypes (Basmoti, Binadhan4 and RD2585) was carried out at BINA, Mymensingh during July to December, 2006 to evaluate the effect of water stress at different growth stages of different T. aman rice genotypes. The experiment was conducted in CRD with three replications putting three rice genotypes at three water levels (100%, 70% and 40% FC). Plant height, numbers of tillers/hill, no. of filled grains /panicle, total dry matter/hill, 1000 grain weight , grain yield and harvest index were decreased with increasing water stress levels. Responses of the rice genotypes in different water stress varied significantly. There had been different degree of reduction to the yield contributing characters for the stress. Binadhan 4 performed better in producing tillers, leaves, total dry matter, and yield under stress than the other two genotypes. Basmoti showed the highest plant height but medium total dry matter, 1000 grain weight and yield. RD 2585 showed the lowest total dry matter, 1000 grain weight, and yield under water stress. Download


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