在农业生产中,氮肥是决定作物产量的一个重要因素。有关氮肥的施肥方法和增产效果,长期以来已有很多报道,但是,对于有机态氮肥,如绿肥以及有机、无机肥结合施用以后,肥料氮素和土壤氮素在作物—土壤系统中的转化和分配动态研究较少。有机肥和绿肥是我国农业生产中的主要肥源。解放以后,全国开始普遍施用化肥,当前有机、无机 Nitrogen fertilizer is an important factor in crop production in agricultural production. For a long time, there have been many reports about fertilization methods and yield enhancement effects of nitrogen fertilizers. However, after the application of organic nitrogen fertilizers, such as green manure and organic and inorganic fertilizers, the conversion of fertilizer nitrogen and soil nitrogen in crop-soil systems and Distribution of dynamic research less. Organic fertilizer and green manure are the main sources of fertilizer in agricultural production in China. After the liberation, the general application of chemical fertilizers throughout the country is currently organic and inorganic