施氮量与栽插苗数对杂交早稻“鄱优364”产量的影响

With the planting density of 16.67 cm × 20 cm the effects of nitrogen fertilizer levels (0, 120, 150, 180and 210 kg/ha 5) and seedling numbers(2, 3, 4 per hole)on the yield were studied with new hybrid early rice of Poyou364.The results showed that the grain yield, effective panicle, grain number per panicle, seed setting rate and 1 000-grain weigh were influenced significantly by nitrogen application.Seed-setting rate and 1 000-grain weight decreased at 210 kg/ha of nitrogen level, but the panicle number and the grain yield did not increased significantly.With the increase of seedling number, the grain yield and effective panicle number increased, the grain number per panicle decreased, and the seed setting rate and 1 000-grain weight showed a decreasing trend.The interaction of nitrogen application amount and seedling number had significant influence on the grain yield, grain number per panicle, seed setting rate and 1 000-grain weigh.With the increase of the amount of nitrogen fertilizer and the number of planted seedlings, yield increased, but the grain number per panicle, seed setting rate and 1 000 grain weight decreased with the increase of the amount of nitrogen fertilizer and the number of planted seedlings had no significant effect on effective panicle.The higher yield of Poyou364 would be obtained with nitrogen application of 180 kg/ha, seedling number of 4 per hole.