土壤微生物生物量氮及其在氮素循环中作用

简述了土壤微生物生物量氮的含量及其影响因素,阐述了其在土壤氮素循环中的重要作用,着重讨论了其与可矿化氮、矿质氮、有机氮和固定态铵之间的关系,指出土壤微生物生物量氮与供氮因子间的关系在氮素循环研究中有非常重要的作用,可为调控土壤氮素的供应状况,减少氮素损失,提高氮肥利用率提供科学依据,并提出了需要深入研究的问题。

Soil microbial biomass nitrogen and its role in nitrogen cycling

The content of soil microbial biomass nitrogen(B_N) and its affecting factors were reviewed,the important roles of soil microbial biomass nitrogen in soil nitrogen cycling were described,and the relationships of soil microbial biomass nitrogen with soil mineralizable nitrogen,mineral nitrogen,organic nitrogen and fixed ammonium were emphatically discussed in this paper.It was indicated that soil microbial biomass nitrogen had a close relationship with the nitrogen-supplying capability of soil,and played an important role in controlling soil nitrogen supply,decreasing soil nitrogen loss,and increasing the efficiency of applied fertilizer nitrogen.The further research items in soil microbial biomass nitrogen were also put forward in this paper.