Papers

PHOTOSYNTHESIS, YIELD ATTRIBUTES AND YIELD OF BORO RICE GENOTYPES UNDER DIFFERENT SALINITY LEVELS (Pages : 9 - 14)

S.A. MUNNI, M.T. ISLAM, B.S. NAHAR, M.S. RAHMAN AND M.A. HAQUE

A pot experiment was conducted at the Bangladesh Institute of Nuclear Agriculture (BINA), Mymensingh, during December 2015 to May, 2016 to study the salt tolerance in Boro rice genotypes viz. Binadhan-10, Binadhan-8, B-10 and B-11. The plants were grown under four salinity levels viz. control, 6 dS/m, 9 dS/m and 12 dS/m. Plant height, number of total tillers/plant, length of panicle, straw weight/plant, number of panicle/plant, filled grain/plant, 1000-grain weight, yield/plant, photosynthesis, chlorophyll, nitrate reductase activity and soluble protein decreased with the increase in salinity levels as compared to the control. Only unfilled grain/plant increased at 9 dS/m. Binadhan-10 showed the highest plant height, filled grains/plant, 1000-grain weight and yield/plant and the lowest soluble protein. The genotype B-10 showed the highest photosynthesis, total tillers and moderate yield/plant. Binadhan-8 showed the highest number of unfilled grains/plant, soluble protein, 1000-granin weight and grain yield/plant. B-11 showed the highest chlorophyll, nitrate reductase activity, 1000-grain weight, and grain yield/plant. Length of panicle and number of panicles/plant was not significant among the studied genotypes. Binadhan-10 and Binadhan-8 showed more tolerance to salinity stress compared to B-10 and B-11.Download


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