干旱区生态环境知识资源中心(Arid): 中国西南喀斯特森林土壤有机碳空间变化及影响因素

Arid

	中国西南喀斯特森林土壤有机碳空间变化及影响因素
其他题名	Spatial Variation of Soil Organic Carbon in Karst Forests of the Southwestern China and Its Affecting Facters
	黄一敏 1; 李心清 1; 杨放 1; 黄代宽 2; 邢英 3
来源期刊	地球与环境
ISSN	1672-9250
出版年	2016
卷号	44 期号:1 页码:1-10
中文摘要	喀斯特地区土壤碳储量及其影响因素的认识是评估我国陆地土壤生态系统碳汇能力不可或缺的内容。本文通过对中国西南北起秦岭北坡南至中越边境一条剖面上土壤有机碳的分析,研究了喀斯特森林0~10 cm土壤有机碳空间变化及其控制因素。研究发现西南地区土壤有机碳含量和碳密度平均为32.3 g/kg和33.1 t /hm~2。无论是在整个西南区还是其省市范围内,二者均低于非喀斯特森林土壤。通径分析表明,影响喀斯特表层土壤碳含量和密度的主要因素有土壤容重、地形海拔和有机质C/N;粘粒含量和年平均气温的影响很小,而降水量仅在地处最北部的陕西省构成了土壤碳密度的影响因素。此现象与世界许多地区特别是高纬度地区形成鲜明对比。本研究结果表明,不同区域/气候带土壤碳库的主要影响因素会存在很大差异,这对认识气候变化背景下土壤碳库的反馈作用具有重要意义。
英文摘要	Knowledge of the soil carbon storage and its affecting factors to Karst area is indispensable for understanding the capacity of carbon sequestration by terrestrial ecosystems of China. Based on analysis of soil organic carbon in a continuous transect from the northern slope of the Qinling Mountains, the Central China, to the border of China to Vietnam, we studied spatial variation and its controlling factors of soil organic carbon to the top 10 cm of soil profile in Karst forests of the Southwestern China. We found that soil organic carbon content (SOC) and soil organic carbon density (SOCD) averaged 32.3 g/kg and 33.1 t/hm~2, respectively. These values are both lower than that of the forest soil of non-Karst forests in either the Southwestern China or its provinces. Path analysis indicates that soil bulk density, topographic elevation and C/N of soil organic matter are major factors to the variations of SOC and SOCD while clay content and annual temperature exert little impact, and annual precipitation only affects SOCD of Shaanxi Province in the most northern part of the studying region, where semi-arid climate dominates. The trivial effect of climate to the soil organic carbon inventory contrasts sharply with many parts of the world, especially at high latitudes, suggesting that major factors to soil organic carbon may differ from region to region or climate to climate. The results are important for understanding the feedback of soil organic carbon stock to the current global warming.
中文关键词	土壤碳库 ; 气候变化 ; 碳储量 ; 喀斯特 ; 碳酸盐岩 ; 石漠化
英文关键词	soil carbon pool climate change carbon storage karst carbonate rocky desertification
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:5636487
来源机构	贵州师范大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/234107
作者单位	1.中国科学院地球化学研究所, 环境地球化学国家重点实验室, 贵阳, 贵州 550002, 中国; 2.贵州省环境科学研究院, 贵阳, 贵州 550001, 中国; 3.贵州师范大学, 贵阳, 贵州 550000, 中国
推荐引用方式 GB/T 7714	黄一敏,李心清,杨放,等. 中国西南喀斯特森林土壤有机碳空间变化及影响因素[J]. 贵州师范大学,2016,44(1):1-10.
APA	黄一敏,李心清,杨放,黄代宽,&邢英.(2016).中国西南喀斯特森林土壤有机碳空间变化及影响因素.地球与环境,44(1),1-10.
MLA	黄一敏,et al."中国西南喀斯特森林土壤有机碳空间变化及影响因素".地球与环境 44.1(2016):1-10.