An experiment was conducted to study the yield components and yield of Boro rice (cv. BRRI dhan63) under different nutrient and weed management strategies. The experiment was laid out in a two factor randomized complete block design with three replications consisting of four nutrient management strategies viz. cowdung 10 t ha-1, recommended dose of chemical fertilizer (urea, triple super phosphate, muriate of potash, gypsum and zinc sulphate @ 258, 101, 120, 113 and 11.5 kg ha-1, respectively), 75% recommended dose of chemical fertilizer + cowdung 5 t ha-1 and 50% recommended dose of chemical fertilizer + cowdung 10 t ha-1; and five weed management strategies viz. weedy check, hand weeding twice at 15 and 30 days after transplanting (DAT), pre-emergence herbicide Panida at 3 DAT, post-emergence herbicide Granite at 10 DAT and Panida at 3 DAT + Granite at 10 DAT. Yield components and yield of Boro rice cv. BRRI dhan63 were significantly influenced by nutrient and weed management strategies. Application of 75% recommended dose of chemical fertilizer + cowdung 5 t ha-1 showed the highest values for all yield components and produced the highest grain yield (6.24 t ha-1) while among the weed management strategies, Panida at 3 DAT + Granite at 10 DAT produced the highest grain yield (6.39 t ha-1) and the interaction of this two treatments also produced the highest grain yield (6.97 t ha-1). Among the different nutrient management strategies, cowdung 10 t ha-1 produced the lowest values of most of the yield contributing characters and grain yield (4.92 t ha-1) while in case of weed management strategies weedy check produced the lowest grain yield (4.55 t ha-1) and the interaction of this two treatments also produced the lowest grain yield (4.05 t ha-1). Therefore, it can be concluded that 75% recommended dose of chemical fertilizer + cowdung 5 t ha-1 combined with Panida at 3 DAT + Granite at 10 DAT can be practiced for the cultivation of Boro rice cv. BRRI dhan63 to obtain the highest grain yield.
Key words: Cowdung, Granite, Herbicide, Panida, Post-emergence, Pre-emergence
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