摘要
土壤有机质(SOM)是极为重要和复杂的天然有机物,从化学本质出发,SOM包括腐殖物质(HS)和非腐殖物质两个主要部分。HS是土壤SOM的主体,在土壤养分循环和碳截获方面具有重要作用。SOM的重要性和复杂性共存,这是激励研究者勇于探索的不竭动力。为了能够更好地了解土壤HS,本文对HS及其组分的形成转化及稳定性(包括形成顺序、相互转化、驱动因素、同位素分异、热力学稳定性等),化学组成和结构特征(包括HS组分的提取、分组、纯化、结构表征等),人为措施响应规律(包括耕作、施肥、土地利用的影响)的研究现状进行了回顾和总结,同时提出今后HS研究中要进一步应用先进技术、重新重视HS化学分组研究、进一步认识HS结构特征,以及探索HS形成转化机制及其与农业措施的关系。
Soil organic matter （SOM） is a kind of natural organic matter, extremely complex in composition and important in soil chemistry. In terms of its chemical nature, SOM consists of two main portions, that is, humic substances （HS） and non-humic substances. HS is the principal body of SOM, and plays a vital role in soil nutrient recycling and carbon sequestration. SOM attracts numerous scientists for it＇s importance and complexity. To better understand soil HS and find new research area, this review sums up status quo of the study on formation-transformation and it＇s stability （including formation sequences of huminc fractions, inter-transformation, driving factors, isotope discrimination and thermodynamic stability, etc. ） , chemical composition and structural characteristics （including extraction, purification and structure characterization, etc. ） of soil HS and its response to human factors （ including the effects of tillage, fertilization and land use, etc. ） and puts forth suggestions that further efforts should be made to apply advanced technology to the study, and resume the study of chemical fractionation and structural characteristics of HS and relationship between HS formationtransformation and agricultural practices.
出处
《土壤学报》
CAS
CSCD
北大核心
2008年第6期1148-1158,共11页
Acta Pedologica Sinica
基金
国家自然科学基金项目(40271069
40471076)
高校博士点基金项目(20040193002)资助
关键词
土壤腐殖物质
形成转化
化学分组
结构特征
耕作施肥
Soil humic substances
Formation-transformation
Chemical fractionation
Structural characteristics
Tillage and fertilization
