EFFECTS OF SALINITY ON MORPHOLOGY AND MINERAL CONTENTS EN SHOOTS OF SOME LOCAL AND MODERN RICE (Oryza saliva L) CULTIVARS

Abstract

An experiment was conducted at the net house of the department of (ieneties and Plant Breeding. Shcr-e-Bangla Agricultural University. Dhaka-I207 under potculture during the Dora season (December-June) of the year 2010-Il to swdy the effects of salinity on morphology and mineral content in shoots of some rice cultivar. The experiment was completed using live varieties (Jatabalam. Chapsal. Kolarmocha. BINA dhan 8 and BRRI dhan4l) and live salinity levels (0. 3. 6. 9 and 12 dSm1). The experiment was set in Completely Randomized Design (CRD) having two factors with three replications. The plant height, total tiller number. shoot dry weight, root dry weight, effective tiller, grain weight were highest in genotypes BRRI dhan4 1 but Kolar-mocha showed the lowest performance under different salinity levels. The highest concentration of Na. Ca2'and Mg2 was in Kolar-mocha and it was lowest in BRRI dhan4l. The shoot of BRRI dhan4l contained the highest concentration of W. Conversely. Kolar-mocha contained the lowest amount of K. The plant height. total tiller number, shoot dry weight, root dry weight, elThctive tiller. filled grain, grain weight were highest mO dSmd level of salinity. The highest K content in shoot (1.64%) was recorded in 0 dSm4. The highest Na content in shoot (1.584%) was recorded in 12 dSni' level of salinity. The Ca content recorded in shoot was highest (1.07 %) in 6dSnf'. 'the lowest Mg (0.35%) content was in the shoot in 0 dSm'. The highest panicle length and filled grain panicle'' was recorded in BRRI dhan4l at 0 dSm4 level of salinity. The minimum number of unfilled grain panicle" was found in BRRI dhan4l at 0 dSm". The highest grain yield hilr' (5.00 g) was found in BRRI dhan4l at 0 dSm" salinity level. The lowest Na content (0.78%). Ca content (0.75%) and Mg content (0.33%) in shoot was found in the cultivar BRRI dhan4l at the 0 dSm" salinity level. Considering the above results cultivar BRRI dhan4l and BINA dhan S were salt tolerant. Chapsal as moderately tolerant and Kolar-mocha and Jatahalam as susceptible cultivar.