土壤微生物量氮含量、矿化特性及其供氮作用

论述了土壤中微生物体氮的含量及其影响因素，土壤微生物量氮的矿化特性及其与土壤矿化氮间的关系，土壤微生物量氮含量与土壤供氮指标间的关系等。提出研究不同生态系统中土壤微生物量氮的含量及其变化规律，不同耕作栽培措施对土壤微生物量氮含量的影响。土壤微生物量在土壤氮素保持和释放中的作用，土壤微生物量氮的转化率与其供氮量间的关系；土壤微生物量氮与作物氮素吸收间的关系等，是土壤微生物量氮方面应重点研究的问题。

Contents of soil microbial biomass nitrogen and its mineralized characteristics and relationships with nitrogen supplying ability of soils

As soil microorganisms decompose the organic matter,they also assimilate a portion of the nutri- ent in soils to build their body.The nutrients in soil microbial biomass are mineralized from the dead mi- croorganisms.Therefore,soil microbial biomass is considered as a source and sink for nutrients,and is an active pool of organic matter in soils.Because of its important role in various ecological systems,nitrogen contained in soil microbial biomass(i.e.,SMBN) has got much attention in recent years.This ...