氮肥是水稻增产的主要因素之一,探索施肥后水稻对肥料氮的利用与土壤对氮素的固定、氮的损失情况,对合理施氮有其重要意义.近年我们与国际肥料发展中心合作,应用~(15)N标记的肥料,研究不同种类、不同造型氮肥以及不同施用量对水稻生长的影响,并初步探讨氮在水稻田中的去向. Nitrogen fertilizer is one of the main factors for rice yield increase. To explore the utilization of fertilizer nitrogen and the fixation of nitrogen and nitrogen loss after fertilization, it is of great significance to nitrogen application rationally.In recent years, in cooperation with International Fertilizer Development Center, The effects of different types and different forms of nitrogen fertilizer and different application rates on the growth of rice were studied using ~ (15) N labeled fertilizers, and the fate of nitrogen in paddy fields was also discussed.