氮素是水稻的主要构成元素之一,土壤的供氮特性对水稻的高产、稳产有着重要的影响。水稻土的供氮特性在南方研究较多,而在我省研究则少。随着农业科学技术的不断发展和人民生活水平的不断提高,水稻种植面积的迅速扩大,对水稻土肥力特性的研 Nitrogen is one of the main components of rice. The nitrogen-supplying characteristics of soil have an important influence on the high yield and stable yield of rice. The characteristics of nitrogen supply in paddy soil are more studied in the south, but less in our province. With the continuous development of agricultural science and technology and the continuous improvement of people’s living standards, the area under rice cultivation has rapidly expanded, and the research on the fertility characteristics of paddy soil