Effects of planting distance, nitrogen and phosphorus fertilizers on yield and yield component of hybrid rice (Bahar 1)

This research was conducted on determination of better planting distance and better amount of nitrogen and phosphorus for hybrid rice (Bahar 1). Planting distance were used in this experiment, include 30×15, 30×20 and 30×25 cm as main factor. And also nitrogen fertilizer was used, include four levels, 65, 95, 125 and 155 k/ha and phosphorus fertilizer used include tow levels, 50 and 100 k/ha as two factors in split plot as split plot factorial design with three replications. This experiment was performance in experimental field of Guilan University in growing season 2008. Result indicate that, planting distance was affected significantly on yield, seed number in square meter, tiller in shrub and fertile tiller in plant. And also, nitrogen fertilizer was affected significantly on number of tiller in shrub, seed number in square meter, fill seed percentage, 1000-seed weight and fertile tiller number. The highest rate of yield, amount of 8.23 ton/ha was obtained from planting distance 30×15cm. The highest number of seed in square meter was obtained from planting distance 30×25cm. Generally, planting distance 30×15 plus application of 155 kg nitrogen per hectare plus application of 100 kg phosphorus is the best conditions for obtaining of high yield in Bahar 1.