INFLUENCE OF NITROGEN AND PLANT SPACING ON GROWTH AND YIELD OF BORO RICE

Abstract

An experiment was conducted at Agricultural farm of Sher-e-Bangja Agricultural University (SAU). Ohaka, during December 2007 to May 2008, in Boro season to study the influence of nitrogen and plant spacing on growth and yield of born There were three doses of nitrogen (150. 200 and 250 kg hi') and four plant spacing's (25 cm x 10cm, 25 cm x IS cm and 25 cm N 20cm and 25 cm respectively). The experiment was laid out in a split-plot design with three replications. Nitrogen rates were placed in main plots and spacing in unit plots (sub-plot). The variety used in the experiment was BRRI dhan29. It was observed that higher rate ofnitrogen application and with higher plant spacing contributed highest plant height, number of tillers hill' and dry weight hilr' but closer spacing showed maximum leaf area index. In case of panicle length. 1000 grain weight, total grain yield, biological yield and harvest index were not responsive to higher rate of nitrogen application and maximum plant spacing but with the application of 200 kg N ha'with 25 cm x 15 cm plant spacing gave the highest grain yield (758 t hi'), biological yield, 1000 grain weight and harvest index.