杂交水稻新品种氮肥利用效率研究

Study on Nitrogen Use Efficiency of New Hybrid Rice Varieties

选取目前水稻大田生产主流杂交水稻新品种徽两优166等5个组合进行氮肥试验,通过高、中、低不同氮肥施用量与不施氮肥进行对比,研究当前主栽杂交稻新品种氮肥需要量和利用效率。结果表明,增加施氮量能够增加各品种的产量,随着施氮量的增加,产量均有不同程度的增加,但均以中高氮水平产量最高。各品种氮肥农学利用率均表现为中氮>低氮>高氮。

Five combinations of Huiliangyou 166, a new mainstream hybrid rice variety in rice field production, were selected to carry out nitrogen fertilizer experiment. Nitrogen fertilizer requirement and utilization efficiency of the main hybrid rice varieties were studied by comparing different nitrogen fertilizer application rates and non-nitrogen fertilizer application rates at high, medium and low levels. The results showed that increasing nitrogen application could increase the yield of all varieties. With the increase of nitrogen application, the yield increased in varying degrees, but the yield of middle and high nitrogen level was the highest. The agronomic utilization efficiency of nitrogen fertilizer of all varieties was medium nitrogen > low nitrogen > high nitrogen.