以水稻高产优质为目标，以斯坦福方程为理论基础，配合现有阶段性的、单项的定量测试方法，对水稻精确定量施氮技术理论的3个参数进行测定及验证，初步找到了一些研究思路和方法。提出了按产量等级测定需氮量的新方法，形成把秸秆还田归为土壤氮素供应量的研究新思路，并发现氮素化肥前后分配比例对氮肥的当季利用率有巨大影响。研究解决了施氮总量及施氮量分配两个方面的精确定量技术问题，使精确定量施氮技术的应用成为可能，同时为"3S"技术的应用提供知识支持。

This study is based on the Stanford equation and aims at getting high yield and high quality rice. With the aid of stage and monomial method of quantitative determination, the three parameters of the precise and quantitative N application theory and technology were measured and validated. In the process of study new, methods and route were found preliminarily, such as a new method for determination of the amount of N requirement by grading the yield of a field, a new route to study by demarcating the N supplied by organic fertilizer to the N supply ability of a field and the great effect of the ratio of N applied as basal fertilizer and that as panicle fertilizer on the NUE was proposed. The research has solved the technology of precise and quantitative N application of total amount of N and its splitting application, thus enabling the application of this technology and supporting the application of"3S" technology.