RESPONSE OF AROMATIC RICE TO LEAF CLIPPING AT SEEDLING AND GROWTH STAGES

Abstract

An experiment was conducted during July to December-2019, at Sher-e-Bangla Agricultural University, Dhaka, Bangladesh to investigate the response of aromatic rice to leaf clipping at different stages. The experiment consisted of two factors, Factor A: Seedling top clipping (3) vi; S₀= Control (no clipping), S₁ =1/3 top clipping and S₂= 1/2 nd top clipping and Factor B: Leaf clipping (During panicle initiation stage) (5) viz; L₀= Control (no clipping), L₁= Lower 1 leaves, L₂= Lower 2 nd and 3 rd leaves, L₃= Lower 3 rd and 4 ii th st and 2 leaves and L₄= Flag leaf clipping. The experiment was laid out in split plot design with three replications. Result revealed that seedling and leaf clipping either individually or combined showed significant variations in most of the characters of aromatic rice. In case of seedling clipping the maximum effective tillers hill -1 (10.86), panicle length (25.98 cm), filled grains panicle -1 (137.72), total grains panicle -1 (166.69), 1000 grains weight (17.64 g), grain yield (4.59 t ha -1 ), straw yield (7.56 t ha -1 nd ), biological yield (12.15 t ha ) and harvest index (37.73 %) were observed in S 1 (1/3 rd seedling top clipping) treatment. In case of leaf clipping the maximum effective tillers hill -1 (11.10), panicle length (27.27 cm), filled grains panicle -1 (146.49), total grains panicle -1 (170.65), 1000 grains weight (18.43 g), grain yield (4.60 t ha -1 ), straw yield (7.69 t ha -1 ), biological yield (12.29 t ha -1 ) and harvest index (37.40 %) were observed in L 0 (No leaf clipping) treatment. In case of combined effect, 1/3 rd seedling top clipping (S 1 ) along with no leaf clipping (L 0 ) treatment combination (S 1 L 0 ) gave the best result to achieving the maximum effective tillers hill -1 (11.80), panicle length (28.39 cm), filled grains panicle (155.00), total grains panicle -1 (177.21), 1000 grains weight (19.61 g), grain yield (5.04 t ha -1 ), biological yield (12.88 t ha -1 ) and harvest index (39.26 %). The corresponding lowest grain yield (3.79 t ha seedling top clipping (S 2 -1 ) of aromatic rice was observed in 1/2 ) along with flag leaf clipping (L 4 ) treatment combination (S 2 L 4 ). Treatment 1/3 rd seedling top clipping along with no leaf clipping is proved to be a best management for extension yield of aromatic rice (BRRI dhan70).