干湿交替条件下的土壤C、N循环过程研究进展

Research Progress on Cyclic Process of Soil C and N Under Dry-Wet Alternation

在干湿交替的条件下,对土壤中C、N的循环以及土壤团聚体结构、土壤胀缩性、土壤微生物和酶活性等的影响进行了综合评述。研究表明,干湿交替对有机C矿化、腐殖化和N矿化、硝化与反硝化产生影响,且与土壤团聚体结构、土壤胀缩性以及土壤微生物和酶活性密切相关。此外,针对目前研究的不足,提出了今后的研究方向,认为干湿交替下土壤C、N循环过程与土壤中微生物特性有关系,为进一步开展干湿交替条件下C、N循环在土壤中转化,为农业生产提供了科学依据。

Under the alternating wet and dry conditions, the effects of C, N circulation, agglomeration structure, expansion and contraction, microorganism and enzyme activity in soils were comprehensively reviewed. Studies showed that, the dry-wet alternation had an impact on organic C mineralization, humification and nitrogen mineralization, nitrification and denitrification, and which had a close relation with the aggregate structure, expansion and contraction, microorganism and enzyme activities in soils. In addition, according to the deficiencies of current research, the future research direction was proposed, and the relationship between soil C, N cycling processes and the soil microbial characteristics under wet-dry alternation conditions was considered, which provided a scientific basis for further developing the transformation of C,N circulation in soils under wet-dry alternation conditions and agricultural production.