Green Global
Foundation Journal
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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. HAQUEA 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