A COMPARATIVE STUDY ON MORPHO-PHYSIOLOGICAL CHARACTERISTICS AND YIELD OF SOME MODERN RICE VARIETIES IN AMAN SEASON

Abstract

The experiment was conducted in the Research Farm of Sher-e-Bangla Agricultural University, Sher-e-Bangla Nagar, Dhaka to observe the morphophysiological

characteristics and yield of six Amanricevarieties named BRRI dhan33, BRRI dhan56, BRRI dhan57, BRRI dhan62, Hira-2 and BRRI hybrid dhan4. The experiment was laid out in Randomized Complete Block Design with three replications. The hybrid rice variety, BRRI hybrid dhan4 showed superiority in respect of growth parameters like plant height, number of tillers hill -1 , number of leaves hill -1 , leaf area hill -1 , LAI,TDM hill -1 over the other varieties. Again, BRRI hybrid dhan4 also showed the highest yield contributing characters like effective tillers hill -1 (15.04), panicle length (15.24 cm), filled grain panicle -1 (141.17), 1000-grain weight (25.16 g) grain yield (6.21 t ha ) followed by Hira-2 (6.03 t ha -1 ), straw yield (7.18 t ha -1 ), biological yield (13.39 t ha -1 ) and harvest index (46.39 %) over the other inbred varieties. The lowest grain yield produced by BRRI dhan33 (3.82 t ha -1 ). In case of grain yield BRRI dhan56 (4.36 t ha -1 ) and BRRI dhan62 (4.29 t ha -1 ) showed statistically similar result. The yield was higher in BRRI hybrid dhan4 including another hybrid Hira-2 might be due to the production of higher number of effective tiller hill , leaf number, TDM, LAI, panicle hill -1 , filled grain panicle -1 and 1000-grain weight.