A COMPARATIVE STUDY ON GROWTH AND YIELD OF DIFFERENT AMAN RICE VARIETIES

Abstract

The experiment was conducted in the experimental field of Sher-e-Bangla Agricultural University, Sher-e-Bangla Nagar, Dhaka during Aman season (July -November) 2016 to study the growth, yield and yield attributes of different Aman rice varieties. The experiment comprised of eight Aman rice varieties viz., BRRI dhan32, BRRI dhan33, BRRI dhan34, BRRI dhan39, BRRI dhan54, BRRI dhan56, BRRI dhan57 and BRRI dhan62. The experiment was laid out in a Randomized Complete Block Design (RCBD) with four replications. Different growth characteristics, yield and yield attributes varied considerably among the studied varieties. At 15, 30, 45, 60 and 75 DAT (days after transplanting) and at harvest, the tallest plant (26.00, 54.10, 77.96, 92.88, 116.00 and 122.68 cm, respectively) were recorded from BRRI dhan32, whereas the shortest plant (21.97, 42.84, 65.32, 75.42, 101.00 and 101.88 cm, respectively) from BRRI dhan62. At 15, 30, 45, 60 and 75 DAT, the highest leaf area index (0.41, 1.75, 3.89, 5.94 and 6.94, respectively) and the highest total dry matter hill-1 (3.24, 7.02, 8.68, 14.92 and 15.37 g, respectively) were recorded from BRRI dhan54, whereas the lowest leaf area index (0.35, 1.48, 2.99, 4.18 and 4.80, respectively) and the lowest total dry matter hill-1 (2.86, 4.51, 7.47, 11.82 and 13.73 g, respectively) from BRRI dhan34. The maximum days to maturity (134.25) were recorded from BRRI dhan34, while the minimum days (100.50) from BRRI dhan33. The maximum number effective tiller hill-1 (16.75) were recorded from BRRI dhan54, whereas the minimum number (12.05) from BRRI dhan34. The longest panicle (25.76 cm) was recorded from BRRI dhan54, while the shortest panicle (21.30 cm) from BRRI dhan34. The maximum number of filled grains panicle-1 (89.90) were recorded from BRRI dhan54, whereas the minimum number (75.80) from BRRI dhan34. The highest weight of 1000-grains (25.71 g) was obtained from BRRI dhan54, while the lowest (19.45 g) from BRRI dhan57. The highest grain yield (5.45 t ha-1) were achieved from BRRI dhan54, whereas the lowest (3.49 t ha-1) from BRRI dhan34. The highest straw yield (7.97 t ha-1) were recorded from BRRI dhan54, whereas the lowest straw yield (6.58 t ha-1) from BRRI dhan34. Among the tested Aman rice varieties, BRRI dhan54 was the best in consideration of yield attributes and yield.