INFLUENCE OF SEEDLING LEAF CLIPPING AND PLANT SPACING ON GROWTH AND YIELD OF BRRI Dhan80

Abstract

A field experiment was conducted at Sher-e-Bangla Agricultural University, Dhaka during the Aman season of June to November 2021, to the study influence of seedling leaf clipping and plant spacing on growth and yield of BRRI dhan80. The experiment was consisted of two factors, and followed Randomized Complete Block Design with three replications. The factors were as Factor A: Seedling leaf clipping (3) viz; C = No seedling clipping, C 1 = Top 1/3 rd portion clipping, C 2 = Top 1/2 nd portion clipping and Factor B: Different plant spacing (4) viz; S 1 = 25 cm × 25 cm, S 2 = 25 cm × 20 cm, S = 20 cm × 20 cm and S = 20 cm × 15 cm. Experimental results revealed that, growth and yield of aromatic rice significantly influenced due to seedling leaf clipping. The highest panicle length (23.79 cm), filled grains panicle 4 -1 (130.52), 1000-grain weight (24.43 g), grain yield (4.59 t ha -1 ), straw yield (5.99 t ha -1 ), biological yield (10.58 t ha ) and harvest index (43.29 %) were observed from C (No seedling clipping) treatment. In the case of different plant spacings, the highest panicle length (24.01 cm), filled grains panicle -1 0 (134.10) and 1000-grain weight (24.82 g) were observed in S (25 cm × 25 cm) treatment. However, the highest grain yield (4.61 t ha -1 1 ), straw yield (6.04 t ha ), biological yield (10.66 t ha -1 ) and harvest index (43.22 %) were observed in S (20 cm × 15 cm) treatment. In the case of treatment combination, C 0 S (No seedling clipping along with 20 cm × 15 cm plant spacing) gave the highest grain yield (5.11 t ha 4 ), straw yield (6.32 t ha -1 ), biological yield (11.42 t ha -1 ) and harvest index (44.71 %) whereas the lowest of these values were observed from C 2 S 1 combination (Top 1/2 nd portion seedling clipping along with 20 cm × 15 cm plant spacing). Based on the above findings, it would be considered that no seedling leaf clipping treatment along with 20 cm × 15 cm plant spacing (C 0 S ) would be helpful to enhance better grain yield production of BRRI dhan80.