Author(s): S. M. M. ISLAM, S. K. PAUL AND M. A. R. SARKAR

Abstract: A field experiment was conducted at the Agronomy Field Laboratory of Bangladesh Agricultural University (BAU), Bangladesh during Aman season of 2013 to find out the effect of weeding regime and integrated nutrient management on the yield of transplaned Aman rice (cv. BRRI dhan49). The experiment comprised with five weeding regimes viz. control (no weeding), one weeding at 15 DAT, two weedings at 15 and 30 DAT, three weedings at 15, 30 and 45 DAT and application of herbicide (Pyrazosulfuran-ethyl 10 WP) @ 150 g ha-1 and five nutrient management viz. BRRI recommended chemical fertilizers (171-83- 100-100-10 kg ha-1 of Urea-TSP-MoP-Gypsum-Zn, respectively), cowdung at 10 t ha-1, poultry manure at 5 t ha-1, 50% BRRI recommended chemical fertilizers + cowdung at 5 t ha-1 and 50% BRRI recommended chemical fertilizers + poultry manure at 2.5 t ha-1. The highest yield contributing characters and the highest grain yield (5.50 t ha-1) was obtained from the interaction between three weedings at 15, 30 and 45 DAT and 50% BRRI recommended chemical fertilizers+ poultry manure at 2.5 t ha-1 whereas the lowest grain yield (3.10 t ha-1) was found from the interaction between no weeding and cowdung at 10 t ha-1. The highest benefit:cost ratio (2.4) was obtained from the combined effect of three weedings at 15, 30 and 45 DAT with 50% BRRI recommended fertilizers + poultry manure at 2.5 t ha-1.

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