干旱区生态环境知识资源中心(Arid): The soil organic carbon stock and its influencing factors in a mountainous karst basin in P. R. China

Arid

DOI	10.1007/s13146-018-0432-3
	The soil organic carbon stock and its influencing factors in a mountainous karst basin in P. R. China
	Zhang, Zhenming 1,2; Zhou, Yunchao 1,2,3; Wang, Shijie3,4 ; Huang, Xianfei 1,2
通讯作者	Zhou, Yunchao
来源期刊	CARBONATES AND EVAPORITES
ISSN	0891-2556
EISSN	1878-5212
出版年	2019
卷号	34 期号:3 页码:1031-1043
英文摘要	Soil organic carbon represents a major carbon pool in terrestrial ecosystems. Currently, in karst areas, there is considerable uncertainty regarding the estimation of soil organic carbon pools due to limited profile numbers and heterogeneity. Using a grid-based sampling method, 2755 soil profiles consisting of 22,057 soil samples were analyzed to determine the spatial distribution and storage of soil organic carbon (SOC) in the Houzhai River Basin in the Guizhou Province in southwest China. The results suggest that the total SOC storages in the 0-20 and 0-100 cm soil horizons of the Houzhai River Basin are approximately 2.65 x 10(8) and 5.39 x 10(8) kg C, respectively. The differences in the soil bulk density between different soil types were considerable. The average soil bulk density of large mud field loam, which ranged from 1.25 to 1.52 g/cm(3), was significantly higher than that of the other soil types. The differences in soil organic carbon content were obvious as well. As soil depth increased, the organic carbon content gradually decreased. At a depth of 0-50 cm, the soil organic carbon content significantly decreased. In contrast, soil organic carbon content decreased slowly from 50 to 100 cm, indicating that a depth of 50 cm is the turning point for organic carbon content. The different degrees of soil organic carbon storage in different soil types were mainly caused by differences in organic carbon density. In karst regions, the soil parent material limits the spatial distribution of soil organic carbon, and soluble rock is the base development material. Soil thickness, slope gradient, and rock exposure are the primary factors leading to differences in SOC storage in different soil types. In addition, this study also suggests that increased attention should be paid to rock exposure in the assessment of SOC stocks in karst mountainous areas, such as the Houzhai River Basin.
英文关键词	Bare rock rate Estimation method Soil organic carbon storage Small watershed Karst
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000483699800039
WOS关键词	SLOPE GRADIENT ; STORAGE ; SEQUESTRATION ; EROSION ; DESERT ; FOREST ; COVER
WOS类目	Geology
WOS研究方向	Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/214793
作者单位	1.Guizhou Univ, Forest Resource & Environm Res Ctr Guizhou Prov, Guiyang 550025, Guizhou, Peoples R China; 2.Guizhou Univ, Coll Forestry, Guiyang 550025, Guizhou, Peoples R China; 3.Puding Karst Ecosyst Res Stn Guizhou Prov, Puding 562100, Peoples R China; 4.Chinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, Guiyang 550002, Guizhou, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Zhenming,Zhou, Yunchao,Wang, Shijie,et al. The soil organic carbon stock and its influencing factors in a mountainous karst basin in P. R. China[J],2019,34(3):1031-1043.
APA	Zhang, Zhenming,Zhou, Yunchao,Wang, Shijie,&Huang, Xianfei.(2019).The soil organic carbon stock and its influencing factors in a mountainous karst basin in P. R. China.CARBONATES AND EVAPORITES,34(3),1031-1043.
MLA	Zhang, Zhenming,et al."The soil organic carbon stock and its influencing factors in a mountainous karst basin in P. R. China".CARBONATES AND EVAPORITES 34.3(2019):1031-1043.