Influence of nitrogen and phosphorus on the growth and yield of BRRI dhan57

The field experiment was carried out during the period from July to November, 2013 at the research farm of Sher-e-Bangla Agricultural University, Dhaka, Bangladesh to investigate the influence of nitrogen and phosphorus on the growth and yield of BRRI dhan57. The two factorial experiments were laid out in a Randomized Complete Block Design (RCBD) with three replications. Four levels of nitrogen N0: 0 kg N ha-1, N1: 90 kg N ha-1, N2: 120 kg N ha-1, N3: 150 kg N ha-1 and three levels of phosphorous P0: 0 kg P2O5 ha-1, P1: 25 kg P2O5 ha-1 and P2: 35 kg P2O5 ha-1 were used in this experiment. Data revealed that at 30 and 60 days after transplanting (DAT) and at the time of harvest the tallest plants were observed in the treatments N2 (120 kg N ha-1), P2 (35 kg P ha-1) and treatment combination N2P2 (120 kg N and 35 kg P ha-1) whereas, the treatments N0, P0 and treatment combination N0P0 (without N and P) showed the smallest plant height in each case, respectively. Side by side, N2,P2 treatments and N2P2 treatment combination gave the maximum effective tillers hill-1, highest length of panicle and the maximum filled grains panicle-1. The highest 1000 grain weight (20.85 g), grain yield (4.95 t ha-1), straw yield (5.39 t ha-1) and biological yield (10.34 t ha-1) were found in the treatment combination N2P2 and also found highest in each individual under N2 and P2 treatments