GROWTH AND YIELD OF AROMATIC RICE AS INFLUENCED BY SEEDLING CLIPPING AND PLANTING DENSITY

Abstract

A field experiment was carried out at Sher-e-Bangla Agricultural University, Dhaka, Bangladesh, during the period from July to December, 2022 to investigate the efficacy of seedling clipping and different planting geometry on the performance of an aromatic rice variety BRRI dhan80. The experiment comprised of two factors; Factor A: Seedling clipping (3) viz. C 1 = Control (no clipping); C 2 = 1/3rd top seedling clipping; C 3 =1/2nd top seedling clipping and Factor B: Different planting geometry (4) viz. G 1 = 25 cm x 20 cm, G 2 = 20 cm x 20 cm, G 3 = 20 cm x 15 cm, and G 4 = 15 cm x 15 cm. The experiment was laid out in randomize complete block design with three replications. Results revealed that seedling and different planting geometry either individually or combined showed significant variations in most of the characteristics of aromatic rice. In case of seedling clipping, the effective tillers hill -1 (14.52), panicle length (26.14 cm), filled grains panicle -1 (171.09), total grains panicle -1 (190.07), 1000-grains weight (24.59 g), grain yield (4.14 t ha 1 -1 ), straw yield (7.94 t ha ) and harvest index (34.18 %) were observed in C 2 -1 ), biological yield (12.09 t ha (1/3rd top seedling clipping) treatment. In case of different planting geometry, the maximum effective tillers hill

(15.31), panicle length (26.68 cm), filled grains panicle 1 1 (196.27), 1000-grains weight (25.30 g), grain yield (4.28 t ha ), biological yield (12.33 t ha -1 -1 (179.00), total grains panicle -1 ), straw yield (8.05 t ha ) and harvest index (34.65 %) were observed in G 3 (20 cm x 15 cm) treatment. In case of combined effect, the maximum effective tillers hill

(16.23), panicle length (27.41 cm), filled grains panicle 1 1 (204.48), 1000-grains weight (26.52 g), grain yield (4.62 t ha ), biological yield (12.76 t ha -1 -1 (189.05), total grains panicle -1 ), straw yield (8.14 t ha ) and harvest index (36.02 %) were observed in C 2

treatment combination. Based on the findings it was concluded that treatment combination of 1/3rd top seedling clipping (C 2 ) along with 20 cm x 15 cm (G 3 ) planting geometry has positive influence on BRRI dhan80 to have maximum yield attributes of grain yield.