IMPACT COMPETITION IN RICE GROWTH AND PRODUCTIVITY

A field experiment was conducted at Mushkab Rice Research Station for State Broad for Agricultural Researches during 2009 and 2010. The aims of the researches to investigate the impact of plant competition (through of transplanting spacings and number of seedlings per hill) in growth and yield of Furat-1 rice variety. Factorial experiment set out in RCBD with three replicates. Spacing included 10, 15 and 20 cm and 1, 2, 3 and 4 seedlings per hill. Statistical results showed that increasing plant density by narrow spacing caused a significant reduction in number of days from transplanting to 50% anthesis, number of days from transplanting to physiological maturity, plant height, panicle length, number of grain per panicle, grain weight and harvest index, on the other hand increased of number of panicles. m(2), paddy yield, sterility percentage and biological yield. Increasing number of seedling per hill contribute in increasing of number of days from transplanting to 50% anthesis, number of days from transplanting to physiological maturity, plant height, number of panicles.m(2), sterility percentage, paddy yield, biological yield and harvest index, while caused disincrements in panicle length, number of grain per panicle, grain weight. There was a significant interaction between spacings and number of seedling per hill in all characteristics studied, reference that highest paddy yield was attained at 10 cm spacing with 2-3 seedlings per hill, yield around from 6.8-6.98 ton.ha(-1). Can be concluded to improve growth Furat-1 rice variety by narrow spacing (10 cm) with increasing number of seedlings per hill even 3 seedlings to attain optimal population density ensure higher yield.