森林生态系统土壤可溶性有机质(碳)影响因素研究进展  

Influence Factors of Soil Dissoluble Organic Matter(Carbon) in Forest Ecosystems:A Review

作　　者：庞学勇[1,2] 包维楷[1] 吴宁[1] 

机构地区：[1]中国科学院成都生物研究所生态恢复重点实验室,成都610041 [2]中国科学院研究生院,北京100049

出　　处：《应用与环境生物学报》2009年第3期390-398,共9页Chinese Journal of Applied and Environmental Biology

基　　金：国家自然科学基金项目(No.40701181);国家“十一五”科技支撑计划项目(No.2006BAC01A15);中国科学院西部行动计划项目(No.KZCX2-XB2-02);中国科学院成都生物研究所知识创新工程领域前沿项目(No.CIB-2007-LYQY-02);中国科学院山地生态恢复与生物资源利用重点实验室和生态恢复与生物多样性保育四川省重点实验室共同资助~~

摘　　要：土壤活性有机质在土壤碳、氮、磷等养分元素的生物地球化学循环方面起着十分重要的作用.森林土壤活性有机碳(SAOC)库是极易变动的,其组分动态与周转速率主要受森林植被类型、演替过程以及由此造成的凋落物输入类型、数量、质量和季节与温湿度、pH等变化的控制.尽管在过去几十年中,关于土壤可溶性有机碳(DOC)已开展了大量的研究,但关于其形成、转移与转化速率,以及对环境变化的反应等结论仍然零散,甚至相互矛盾,因此,研究土壤DOC动态及持续管理,必需从探讨其影响因子出发,找出其关键限制因子进行调控.在将来的研究中,主要应集中在:(i)各种可溶性有机质(DOM)源和汇的大小与DOC定量变化关系,如何进行调控?(ii)在高度人为化管理的森林生态系统中,土壤DOC如何改变?(iii)DOC动态及周转速率的现代研究方法探索等.Soil active organic matter/carbon （SAOC） plays an important role in the biogeochemical cycle of carbon nitrogen and phosphorus in soils. The aim of this review is to summarize the recent literature about the influence factors of soil dissoluble organic carbon （DOC） in forest ecosystems. Forest soil DOC is easily variable, and its fraction dynamic and turnover are mainly affected by biotic and abiotic factors. Biotic factors mainly include type, quantity and quality of litter and decomposer communities; and abiotic factors mainly consist of soil pH, soil temperature, soil moisture and land use. These factors are controlled by vegetation and succession process. Despite intensive research in the last decade, our knowledge of the formation and fate of soil DOC and its response to changing environmental conditions is still fragmented and often inconsistent. So, it was necessary to study the influence factors of soil DOC dynamics and put forwards the sustainable management practices. The following preferential topics are suggested for the future study on soil DOM in forest ecosystmes： （1） the relationship between various sources and sinks of DOM, and its dynamics and controlling factors; （2） the way that soil DOM fluxes in altered human-management forest ecosystems; and （3） the new analytical techniques （isotopic, or detailed characterization of DOM constituents）.

关 键 词：土壤活性有机质 土壤活性有机碳 可溶性有机碳 微生物生物量碳 矿化碳 

分 类 号：S714[农业科学—林学]