GROWTH AND YIELD OF SCENTED RICE AS AFFECTED BY CLIPPING MANAGEMENT

Abstract

The experiment was conducted at Sher-e-Bangla Agricultural University, Dhaka during the period from July to December 2019 to investigate the growth and yield of scented rice as affected by clipping management. The experiment consisted of two factors, Factor A: Seedling top clipping (3) viz: S 0 = Control (no clipping), S 1 =1/3 clipping and S 2 = 1/2 nd clipping and Factor B: Leaf clipping before panicle initiation (5) viz: L = Control (no clipping), L 1 = Lower 1 st & 2 nd leaves, L 2 = Lower 2 nd & 3 = Lower 3 rd & 4 th leaves and L 4 = Flag leaf. The experiment was laid out in split plot design with three replications. The test crop variety was BRRI dhan80. Data were recorded on growth, yield attributes and yield of aromatic rice and significant variation either individually or combined was observed for most of the studied characters. Results revealed that in respect of seedling top clipping the maximum effective tillers hill -1 (12.68), panicle length (25.31 cm), filled grains panicle -1 (176.58), total grains panicle -1 (200.39), 1000 grains weight (23.89 g), grain yield (4.07 t ha ), straw yield (7.76 t ha -1 ), biological yield (11.83 t ha -1 ) and harvest index (34.34 %) were recorded from S 1 (1/3 rd seedling clipping) treatment. In respect of leaf clipping the maximum effective tillers hill -1 (13.43), panicle length (26.12 cm), filled grains panicle (190.95), total grains panicle -1 (208.73), 1000 grains weight (25.21 g), grain yield (4.08 t ha ), straw yield (7.89 t ha -1 ), biological yield (11.97 t ha -1 ) and harvest index (34.04 %) were recorded from L 0 rd rd -1 (No leaf clipping) treatment. In case of combined effect, 1/3

seedling clipping (S 1 ) along with no leaf clipping (L 0 leaves, L 3 -1 ) treatment combination (S ) had maximum effective tillers hill -1 (14.68), panicle length (27.19 cm), filled grains panicle -1 (206.07), total grains panicle -1 (221.42), 1000 grains weight (26.24 g), grain yield (4.52 t ha -1 ), biological yield (12.56 t ha -1 ) and harvest index (36.11 %) from S treatment combination. The corresponding lowest grain yield (3.28 t ha ) was recorded from 1/2 nd seedling clipping (S 2 ) along with flag leaf clipping (L ) treatment combination (S