COMPARATIVE STUDY OF SALINITY TOLERANCE BETWEEN TWO RICE VARIETIES BINA dhan 10 AND BRRI dhan47

Abstract

A pot experiment was conducted at the net- house of the department of Agricultural Chemistry. Sher-e-Bangla Agricultural University. Dhaka-1207 during l3oro rice cropping season (December 2012 to June2013) to observe the effect of salinity on two rice varieties BINA dhan 10 and BRRI dhan47. Five salinity levels viz. 0. 4, 8. 12 and 16 dSm1were imposed on the experiment. The experiment was set in Completely Randomized Desi (CR1)) having two factors with three replications. The results on the effect of morphological characters indicated that plant height, total tillers, effective tiller, number of non effective tiller, root dry weight, shoot dry weight. number of field grain, number of unfilled grain, panicle length and grain yield were influenced by the varieties. The tallest plant was found in cultivar BRRI dhan47. BINA dhan 10 achieved maximum number of total tiller, root dry weight (ROW). effective tillers hill'. panicle length, number of filled grain panicic". Among the two varieties the highest grain yield (3.40 g hill5 was found in cultivar BINA dhanl0 and the lowest yield (2.66 g hill') was recorded in BRRI dhan47. Among different salinity levels highest growth and yield contributing characters found at 0 dSm". The maximum number of total tiller hill', effective tiller hill'. RDW and SDW. panicle length and number of filled grain panicle' were found at 0 dSm'. lie highest grain yield (6.09 g hill') was also recorded at control treatment. Among the combined effects of varieties and salinity levels, highest grain yield (6.86 g hiw') was obtained from BINA dhan 10 at 0 dSm' and at 4. 8. 12 dSm' salinity levels BINA dhan 10 should better result than BRRI dhan47. Among the two varieties. K content was highest in BINA dhan 10 than BRRI dhan47. In both varieties K content decreased significantly with the increasing salinity level. Na content was higher in BRRI dhan47 than BINA dhan 10. In both varieties it increased significantly with the increasing salinity level.