土壤氮素矿化模型研究进展

Study on Models of Mineralization of Soil Nitrogen

土壤氮素矿化研究对从农田生态系统氮素平衡到全球变化和环境问题均具有重要意义。土壤氮素矿化模型的研究方面,目前主要还是以简单功能模型模拟和预测氮素矿化量为主,以双组分一阶动力学模型和一阶—零阶混和动力学模型拟合效果较好;对机理模型的研究还处于探索阶段。从目前的研究看,土壤氮素矿化模型研究应当集中在建立机理模型以阐明主要生态系统的氮素矿化过程。

Mineralization of nitrogen from various sources can contribute significantly to soil nitrogen balance, to total plant nitrogen availability, and to environmental quality and global change. Various approaches are used for modeling nitrogen mineralization, and a two-fraction first-order kinetic model and a mixed first- and zero-order kinetic model are regarded as the appropriate models for nitrogen mineralization estimated in various situations. However, to date mechanic models are not so widely developed. It is crucial to establish mechanic models to elucidate the soil nitrogen mineralization in the context of global changes.