STUDY ON CULTIVATION OF TRANSPLANT AMAN RICE THROUGH SEPARATED TILLERS FROM INBRED AND HYBRID RICE VARIETIES

Abstract

The experiment was conducted at the experimental area of Sher-e-Bangla Agricultural University, Sher-e-Bangla Nagar, Dhaka during the period from June to November, 2014. The trial was conducted with two levels of treatments viz. A. Variety: BRRI dhan33, BRRI dhan62 and chamak 1; and B. Separated tillers age: 20, 25, 30 and 35 days. Variety had significant effect on all the parameters like plant height, number of tillers hill -1 , total dry weight, total grains panicle -1 , filled grains panicle , unfilled grains panicle -1 , 1000-grain weight, grain yield and straw yield except effective tillers hill -1 , panicle length, and harvest index. The experiment was laid out in a split plot design with three replications. The tallest plant at harvest (95.22 cm) was recorded from V (BRRI dhan33) treatment. In comparison, the shortest plant at harvest (81.57 cm) was observed in V 1 (Chamak 1) treatment. The longest panicle (27.25 cm) was recorded from V 3 3 (Chamak 1) treatment. In comparison, the shortest panicle (23.72 cm) was observed in V (BRRI dhan62) treatment. The highest number of grain panicle -1 2 (141.40) was recorded from V (Chamak 1) treatment. In comparison, the lowest number of grain panicle -1 3 (107.40) was observed in V (BRRI dhan62) treatment. The maximum weight of 1000 grain (26.34 g) was recorded from V 2

(BRRI dhan33) treatment. In comparison, the minimum weight of 1000 grain (23.17 g) was observed in V 3 (Chamak 1) treatment. The maximum grain yield (4.74 t ha ) was recorded from V (Chamak 1) treatment. In comparison, the minimum grain yield (3.52 t ha -1 3 ) was observed in V (BRRI dhan62) treatment. Separated tillers of different age showed significant effect on plant height of T. aman rice. The tallest plant at harvest (93.30 cm) was recorded from D 2 (25 days old) treatment. On the other hand, the shortest plant at harvest (84.39 cm) was observed in D 2 (35 days old) treatment. The longest panicle (26.36 cm) was recorded from D (25 days old) treatment. On the other hand, the shortest panicle (24.20 cm) was observed in D (35 days old) treatment. The highest weight of 1000 grain (26.19 g) was recorded from D (25 days old) treatment. On the other hand, the lowest weight of 1000 grain (23.86 g) was observed in D 4 (35 days old) treatment. The highest grain yield (4.68 t ha ) was recorded from D (25 days old) treatment. On the other hand, the lowest grain yield (3.96 t ha -1 2 ) was observed in D 4 2 (35 days old) treatment. It was concluded that separated tillers age should be within 20 to 30 days because aged separated tillers affected the growth and yield of both hybrid and inbred rice. However Chamak 1 showed higher yield over the varieties studied in the experiment. 4 -1 -1 4 -1 1 2