干湿交替条件下土壤有机碳转化及影响机制研究进展  

Research Advances in Soil Organic Carbon Transformation as Related to Drying and Wetting Cycles

作　　者：王健波[1] 张燕卿[1] 严昌荣[1] 刘恩科[1] 

机构地区：[1]中国农业科学院农业环境与可持续发展研究所,农业部旱作节水农业重点开放实验室,北京100081

出　　处：《土壤通报》2013年第4期998-1004,共7页Chinese Journal of Soil Science

基　　金：国家973项目(2012CB955904);国家自然科学基金(31000253,31170490);国家“十二五”科技支撑计划课题(2012BAD09B01)资助

摘　　要：土壤有机碳对陆地生态系统中碳收支起到重要作用,关系到全球碳循环和全球变化。综述了干湿交替条件下土壤有机碳的矿化和有机物质的腐殖化的研究进展,以及土壤团聚体结构、土壤胀缩性和土壤微生物活性等对土壤有机碳转化的影响。国内外研究表明,干湿交替对土壤有机碳转化具有重要影响,土壤团聚体、土壤胀缩性以及土壤微生物活性和群落变化与土壤有机碳的转化关系密切。在此基础上,提出今后干湿交替条件下土壤有机碳转化的研究方向及发展趋势,为有效调控土壤中碳循环与周转提供新的思路与方法。The soil organic carbon played a vital role in carbon budget of the terrestrial ecosystem and was involved in carbon cycle and global change. This paper summarized research advances in mineralization and respiration of the soil organic carbon and humification of organic matters and discussed influences on soil organic carbon transformation from the soil aggregate structure, soil shrinking and swelling characteristics and the microbial activities as related to drying and wetting cycles. Researches both at home and abroad discovered that the drying and wetting cycles were important for soil organic carbon transformation and that soil aggregate, soil shrinking and swelling characteristics, microbial activities and microbial community were closely related to such transformation. Based on the foregoing discussions, this paper put forward research direction and development trend of soil organic carbon transformation as related to drying and wetting cycles, in the hope of providing new thinking and methods for regulation of soil carbon cycle and turnover.

关 键 词：干湿交替 土壤有机碳 矿化和腐殖化 团聚体和胀缩性 微生物特性 

分 类 号：S153.6[农业科学—土壤学]