氮肥不同基追比例对水稻保墒旱直播产量的影响

Effect of Different Nitrogen Fertilizer Base Dressing and Topdressing Ratio on Yield of Soil Moisture Preservation and Dry Direct Seeding Rice

通过对水稻保墒旱直播氮肥不同基追肥比例试验的结果表明:在施氮量(纯N)240 kg/hm2水平下,水稻保墒旱直播氮肥最佳基追肥比例为基肥43.6%,追肥56.4%,水稻理论单产10 012.2 kg/hm2,氮肥的利用率可达44.5%。

An experiment on the effect of different nitrogen fertilizer base dressing and topdressing ratio on yield of soil moisture preservation and dry direct seeding rice was conducted. The result shows that under the condition of nitrogen fertilizer （pure N） application amount of 240 kg/hm2, the optimal base dressing and topdressing ratio for soil moisture preservation and dry direct seeding rice is 43.6 ： 56.4, the theoretical yield of rice is 10 012.2 kg/hm2 and nitrogen fertilizer utilization rate is 44.5%.