干旱区生态环境知识资源中心(Arid): 干旱区土地退化与荒漠化对土壤碳循环的影响

Arid

	干旱区土地退化与荒漠化对土壤碳循环的影响
其他题名	Influence of Soil Degradation and Desertification on Soil Carbon Cycling in Arid Zones
	樊恒文; 贾晓红; 张景光; 马凤云; 李新荣
来源期刊	中国沙漠
ISSN	1000-694X
出版年	2002
卷号	22 期号:6 页码:525-533
中文摘要	荒漠化是干旱区的最为严重生态退化问题，它的发生和发展对干旱土壤碳循环有着理要的影响。土壤是作球陆地生态系统最大的碳库，土壤中碳的固存和向大气的释放直接关系到全球气候的变化。干旱土壤全球陆地总面积的40％，因此，它在全球碳循环中占有重要的地位。干旱区土地退化和荒漠化对土壤碳循环的影响包括两个主要方面：①它促进了SOC和无机碳的矿化，使之向大气释放CO_2，增加了温室效应；②由于荒漠化增加了大气尘埃含量，减少了辐射，在一定程度上间接地缓解了土壤碳的损失。文章综述了近年来相关研究的进展，评价了干旱区土壤碳的固存和在缓解温室效应方面的潜在能力。讨论了干旱荒漠化地区对全球碳平衡的贡献和在干旱区促进土壤碳固存的基本策略。
英文摘要	Desertification has aroused very severely ecological degradation issues in arid zone, its cause and development play a significant role in soil carbon cycling of dryland. Soils are major reservoir of carbon and important sink in terrestrial ecosystem. Global climatic changes correlate directly with the sequestration and emission of car-bon by soil. Dryland does most in global carbon cycling because it occupies 40% of the earth’s surface. The main influences on carbon cycling of soil degradation and desertification in drylands include two aspects: (1) the promo-ted mineralization of SOC (soil organic carbon) and SIC (soil inorganic carbon) leads to emission of CO_2 to the at-mosphere, increasing greenhouse effect; (2) the increase of dust content in atmosphere mitigates indirectly the lose of soil carbon to some extend through limiting radiation. In this paper, the recent advances of related researches were reviewed, the potential ability of carbon sequestration by soils and role of dryland in mitigating greenhouse effect were discussed. Finally, strategies of promoting sequestration of soil carbon in dryland were suggested based on the contribution of dryland to global carbon balance.
中文关键词	荒漠化 ; 干旱土壤 ; 土壤碳固存 ; 碳循环 ; 全球变化
英文关键词	desertification soil degradation carbon sequestration by soils carbon cycling global climatic changes
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:1140672
来源机构	中国科学院西北生态环境资源研究院
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/203683
作者单位	中科院寒区旱区环境与工程所, 沙坡头沙漠试验研究站, 兰州, 甘肃 730000, 中国
推荐引用方式 GB/T 7714	樊恒文,贾晓红,张景光,等. 干旱区土地退化与荒漠化对土壤碳循环的影响[J]. 中国科学院西北生态环境资源研究院,2002,22(6):525-533.
APA	樊恒文,贾晓红,张景光,马凤云,&李新荣.(2002).干旱区土地退化与荒漠化对土壤碳循环的影响.中国沙漠,22(6),525-533.
MLA	樊恒文,et al."干旱区土地退化与荒漠化对土壤碳循环的影响".中国沙漠 22.6(2002):525-533.