EFFECT OF INTEGRATED WEED MANAGEMENT ON GROWTH AND YIELD OF AROMATIC RICE

Abstract

This study was conducted at the Agronomy field of Hajee Mohammad Danesh Science and Technology University to evaluate the effects of integrated weed management strategies (T1 = control, T2 = Pre-emergence herbicide + one hand weeding, T3 = Post emergence herbicide + one hand weeding 20 DAT and T4 = Pre-emergence herbicide + Post-emergence herbicide 40 DAT) and two aromatic rice varieties (V1 = Kalizira and V2 = Tulsimala) on the growth and yield performance. A two factor RCBD design with three replications was employed for the experiment. Results revealed that, variety Tulshimala V2 showed the longest plant height (159.30 cm at harvest), number of tillers hill-1 (14.49 at 90 DAT), number effective of tillers hill-1 (13.90), panicle length (20.22 cm), number of grains panicle-1 (173.90), number of filled grains panicle-1 (162.64), 1000-grain weight (13.17 g), grain yield (2.19 t ha-1), straw yield (5.78 t ha-1) and harvest index (30.94%). While highest number of non-effective tillers hill-1 (4.19), number of unfilled grains panicle-1 (19.97) and biological yield (7.97 t ha-1) was seen from Kalizira variety (V1). On the other hand, T3 showed the longest plant height (165.93 cm at harvest), number of tillers hill-1 (18.67 at 90 DAT), number effective of tillers hill-1 (16.89), panicle length (22.61 cm), number of grains panicle-1 (178.14), number of filled grains panicle-1 (166.33), 1000-grain weight (13.41 g), yield (2.40 t ha-1), biological yield (8.20 t ha-1) and harvest index (29.31%). The highest number non-effective of tillers hill 1 (7.97), number of unfilled grains panicle-1 (27.36) was found from (T1) and straw yield (5.78 t ha-1) from (T4). Interaction effect of variety and integrated weed management had also significant influenced on growth, yield and yield contributing traits of aromatic rice. Treatment V2T3 showed the best performance across all the growth and yield characters; longest plant (170.20 cm at harvest), number of tillers hill-1 (18.38 at 90 DAT), number of effective tillers hill-1 (18.67), panicle length (24.13 cm), number of grains panicle-1 (178.98), number of filled grains panicle-1 (173.67), 1000-grain weight (14.04 g), grain yield (2.61 t ha-1), straw yield (5.85 t ha-1), biological yield (8.46 t ha-1) and harvest index (30.94%). These findings suggest that Tulshimala variety exhibits a significantly enhanced performance under the integrated weed management practice of post emergence herbicide application with one hand weeding at 90 DAT, recommending its potential as an effective strategy for improving yield outcomes in the study region.