不同秸秆还田模式对土壤有机碳周转的影响

Effect of residue return patterns on soil organic carbon turnover——A review

秸秆还田可以有效增加土壤有机质含量,改善土壤肥力,同时影响土壤微生物的活性,促进土壤碳氮循环,有利于农业生产可持续发展。本文主要从秸秆还田后的碳周转特征及研究方法,以及秸秆还田的作物类型、还田秸秆部位、秸秆还田量和还田方式对土壤有机碳的影响进行综述,旨在全面了解还田后秸秆的分解转化以及对土壤碳周转的影响。指出未来研究中应该更加关注如何高效地进行秸秆还田,结合秸秆自身条件以及土壤环境,选择一种适合作物生长、可以最大化提高土壤肥力的还田方式。

Return of crop residue to the soil increases soil organic matter,and significantly improves soil fertility.Crop residue return also influences the soil microbial activities and soil carbon and nitrogen cycles,which supports the development of sustainable agricultural production.This review focused on two aspects:a)the characteristics of soil carbon turnover under residue return and associated research methods;b)the effects of straw return patterns(types of crop residues,different parts of residues,the amount of returned residue and the method of residue return)on soil organic carbon.Considering all of these factors together would help us fully understand the decomposition and transformation of returned residue in soils and its influence on soil carbon turnover.In future studies,more attention would be paid to improve the efficiency of residue returned.Combining the characteristics of residues with the soil environments would be essential in selecting the best way of returning residue for maximum improvement of soil fertility and crop growth.