在研究冬小麦吸氮规律和麦田土壤供氮规律的基础上，在春季追施氮肥时，通过土壤和麦株氮素营养诊断确定施肥量。运用这一氮调技术，克服了习惯施肥的盲目性，使冬小麦春季追氮定量化，经济效益和社会效益明显。 Based on the study on the nitrogen uptake of winter wheat and the regulation of soil nitrogen supply in wheat field, the amount of fertilizer application was determined through the nitrogen nutrition diagnosis of soil and wheat plants when topdressing nitrogen fertilizer in spring. The use of nitrogen technology to overcome the blindness of the habit of fertilization, winter wheat nitrogen quantify the amount of nitrogen, economic and social benefits.