土壤氮素矿化与固定及其影响因素的研究

土壤有机氮占表土总氮的90%以上。有机氮的矿化和分解是提高氮素利用率的关键。掌握土壤中有机氮的矿化与固定问题,对探讨减少土壤氮素损失和提高氮素利用率具有重要的理论指导意义。本文简述了有机氮矿化、矿化氮的固定及矿化与固定的影响因素,展望有机氮矿化研究中存在的问题,以期丰富人们对氮素利用的认识,为合理调控土壤肥力、优化土壤氮施用提供理论依据。

Research of Soil Nitrogen Mineralization-Fixation and Their Influence Factors

Soil organic nitrogen accounts for over 90％ of the total topsoil,the key role of increasing N utilization rate is the nitrogen decomposition and mineralization.To master the minerlization and fixation of soil organic nitrogen has an important theoreticalsignificance on exploring the reduction of nitrogen loss and increasing N utilization.The paper describes the nitrogen decomposition and mineralization and their influence factors,and proposes the remaining problems in soil organic nitrogen,so as to enrich the primary understanding of N utilization and provide the theories basis for reasonably regulatation soil fertility and optimization of N application.