沿淮地区不同氮肥用量对水稻生长和产量的影响

Effects of Different Nitrogen Fertilizer Dosages on Rice Growth and Yield in the Huaihe River Region

摘要: 本试验以南粳9108为研究对象，通过不同施氮量和不同使用时期探讨氮肥对机插水稻生育进程、茎蘖动态以及产量构成因素的影响，结果表明，不同施氮量和施肥模式对生育期影响很小，误差在1天左右。随着用氮量加大，分蘖性、株高呈上升趋势。纯氮用量375 kg/hm²，基肥和分蘖肥均为225 kg/hm²，不施保花肥的处理产量结构合理，理论产量达到10444.65 kg/hm²，实际产量达到9737.10 kg/hm²，均为最高，并且产量三要素较为协调，田间病虫害较轻。

Abstract: This experiment takes Nanjing 9108 as the research object, and explores the effects of nitrogen fertilizer on the growth process, stem and tiller dynamics, and yield components of machine inserted rice through different nitrogen application rates and periods. The results show that different nitrogen application rates and fertilization modes have little impact on the growth period, with an error of about 1 day. With the increase of nitrogen usage, tillering ability and plant height show an upward trend. The pure nitrogen dosage is 375 kg/hm², and the base fertilizer and tillering fertilizer are both 225 kg/hm². The yield structure of the treatment without applying flowering fertilizer is reasonable, with a theoretical yield of 10444.65 kg/hm² and an actual yield of 9737.10 kg/hm², both of which are the highest. The three factors of yield are relatively coordinated, and the field diseases and pests are relatively light.