森林土壤氮转化与循环研究进展

Research Advances on Nitrogen Transformation and Cycling in Forest Soil

N是植物生长必需的矿质元素,土壤中N的迁移转化既影响土壤的供N能力和林地生产力,也与环境污染紧密相关,一直是研究的热点领域。文中综述了土壤N的来源和转化问题,重点介绍了凋落物归还、施肥、大气沉降和生物固N等4个来源以及矿化与固持、反硝化、氨挥发和硝态N淋溶等4个转化,讨论了需进一步加强的研究领域,以期为以后的研究提供思路和参考。

Nitrogen is one of the necessary mineral elements for plant growth, and the transfer and transformation of nitrogen in soil is not only affecting the nitrogen supply ability of soil and the productivity of woodland, but also closely related to the environmental pollution. Therefore, it is always the hot issue for study all over the world. This paper introduced the source and transfer of soil nitrogen, including 4 sources, i. e. , litter return, fertilization, atmosphere deposition and biological nitrogen fixation, and 4 transfers, i. e. , mineralization and immobilization, denitrification, NH3 volatilization, and NO3- leaching. The future research fields that need to be more focused on were discussed. This study is expected to stimulate inspirations for the future exploration.