GROWTH AND YIELD PERFORMANCE OF TEN SELECTED RICE VARIETIES IN AMAN SEASON

Abstract

An experiment was conducted at the Experimental Field of Agricultural Botany Department, Sher-e-Bangla Agricultural University, Dhaka-1207, Bangladesh, during June, to November, 2019 to evaluate the growth, yield and yield attributing characteristics of ten Aman rice varieties of Bangladesh namely; BRRI dhan 80, BRRI dhan 79, BRRI dhan 70, BRRI dhan 56, BRRI dhan 54, BRRI dhan 53, BRRI dhan 52, BRRI dhan 51, BRRI dhan 41 and BRRI dhan 40. The experiment was laid out in a Randomized Complete Block Design (RCBD) with three replicates. Parameters on, growth parameter viz. plant height and number of tillers hill -1 (at different days after transplanting); yield contributing characters such as effective tillers hill -1 , panicle length, number of grains panicle , filled grains panicle -1 , thousand grain weight, grain yield, straw yield, biological yield and harvest index were recorded. The plant height and number of tillers hill at different days after transplanting varied significantly among the varieties up to harvest, the tallest plant (123.70 cm) was recorded in BRRI dhan 70 and the shortest (81.13 cm) was found in BRRI dhan 41. The maximum number of tillers hill -1 (45.60) was observed in BRRI dhan 70 and the minimum (20.40) in BRRI dhan 52. All of the parameters of yield and yield contributing characters differed significantly at 1% level except grain yield, biological yield and harvest index. The maximum number of effective tillers hill ii -1 (43.76) was recorded in the variety BRRI dhan 70 while BRRI dhan 40 produced the lowest effective tillers hill

(17.53). The highest (133.81) and the lowest (42.69) number of filled grains panicle -1 was observed in the variety BRRI dhan 70 and BRRI dhan 40 respectively. Thousand grain weights were the highest (26.45 g) in BRRI dhan 70 and the lowest (18.88 g) in BRRI dhan 53. Grain did not differ significantly among the varieties but numerically the highest grain yield (5.01 t ha ) was found in the variety BRRI dhan 54 and the lowest in BRRI dhan 41 (3.78 t ha

-1 -1 -1 -1 -1 ).