【摘要】 可溶性有机氮(SON)是指土壤中可以溶于水或盐溶液的有机态氮,在土壤中的行为既不同于矿质氮,也不同于不溶性有机氮。综述了对这一特殊的氮素组分研究进展,包括不同生态系统土壤SON的含量,SON与土壤氮素供应、转化的关系,SON在土壤氮素损失中的作用等,认为SON是土壤氮素中的重要组分之一,今后应开展土壤SON在不同土壤生态系统中氮素循环中作用的研究工作。更多还原

【Abstract】 The soluble organic nitrogen in soil (SON) is defined as the orga ni c nitrogen in soil that could be dissolved in water or salt solution. The behavi or of SON in soil is different from that of mineral nitrogen and insoluble organ ic nitrogen. This paper has summarized the advances in studying the roles of SON in soils in recent years, including the contents and changes of SON in differen t ecosystems, the relationship between SON and nitrogen in the supply and transf ormation of nitrogen in soils, the roles of SON in the loss of soil N. SON is co nsidered as an important pool of soil N, and more attentions are advised to dire ct to this form of soil N.更多还原