根际微型土壤动物——原生动物和线虫的生态功能

从养分释放、土壤有机碳积累和稳定、根系激素效应、微生物多样性和功能稳定性、地上部多营养级关系及污染土壤生物修复概述了根际微型土壤动物(原生动物和线虫)对根际生态功能的影响,特别针对微型土壤动物与微生物和根系的相互作用探讨了可能的机制。微型土壤动物的选择取食、主动迁移和代谢分泌行为,不仅贡献根际生态功能,而且对土壤整体及地上部群落有强烈的影响。总之,不考虑根际微型土壤动物与微生物和根系的相互作用,就不可能对根际生态功能和调控机制有全面的认识。

Contributions of soil micro-fauna (protozoa and nematodes) to rhizosphere ecological functions

Contributions of micro-fauna(protozoa and nematodes)to rhizosphere ecological functions and possible mode of action were reviewed.Micro-fauna in rhizosphere play an important role in release of plant available nutrient,soil organic carbon accumulation and stabilization,hormonal effects on roots,microbial diversity and functional stability,multitrophic interactions aboveground,and bioremediation of contaminated soils.Selective grazing,active dispersal and excretion by the micro-fauna not only benefit the ecological functions in rhizosphere,but also have an impact on the whole soil and aboveground community.It appeared that mechanistical understanding rhizosphere ecological functions would remain incomplete without considering the interactions of micro-fauna with microorganisms and roots.