干旱区生态环境知识资源中心(Arid): Mechanism and Evolution of Soil Organic Carbon Coupling with Rocky Desertification in South China Karst

Arid

DOI	10.3390/f13010028
	Mechanism and Evolution of Soil Organic Carbon Coupling with Rocky Desertification in South China Karst
	Wang, Xingfu; Huang, Xianfei; Xiong, Kangning; Hu, Jiwei; Zhang, Zhenming; Zhang, Jiachun
通讯作者	Xiong, KN (corresponding author)，Guizhou Normal Univ, State Engn Technol, Sch Karst Sci, Inst Karst Desertficat Control, Guiyang 550001, Peoples R China.
来源期刊	FORESTS
EISSN	1999-4907
出版年	2022
卷号	13 期号:1
英文摘要	To study the spatial distribution characteristics of soil organic carbon (SOC) coupled with rocky desertification, 1212 soil samples from 152 soil profiles were sampled from different karst landforms, including karst low hills/virgin forest (KLH) in Libo County, a karst peak-cluster depression (KPCD) in Xingyi County, a karst canyon (KC) in Guanling County, a karst plateau basin (KPB) in Puding County and a karst trough valley (KTV) in Yinjiang County. The spatial distribution characteristics of the responses of SOC, SOC density (SOCD), rocky desertification and soil bulk density (SBD) to different influencing factors were analyzed. The relationships among SOC, SOCD, rocky desertification and SBD were analyzed using Pearson correlation analysis. The SOC storage capacity was characterized by using SOCD, and then the SOC storage capacity in different evolution stages of karst landforms was assessed. The SOC contents of KLH, KPCD, KC, KPB and KTV ranged from 6.16 to 38.20 g center dot kg(-1), 7.42 to 27.08 g center dot kg(-1), 6.28 to 35.17 g center dot kg(-1), 4.62 to 23.79 g center dot kg(-1) and 5.24 to 37.85 g center dot kg(-1), respectively, and their average SOCD values (0-100 cm) were 7.37, 10.79, 7.06, 8.51 and 7.84 kg center dot m(-2), respectively. The karst landforms as ordered by SOC storage capacity were KPCD > KPB > KLH > KTV > KC. The SOC content was negatively correlated with the SBD; light rocky desertification may lead to SOC accumulation. The rocky desertification degree and SBD were closely associated with slope position and gradient. Rocky desertification first increased, then decreased from mountain foot to summit, and increased with increasing slope gradient. However, the SBD decreased from mountain foot to summit and with increasing slope gradient. The SOC contents on the northern aspect of the mountains were generally higher than the other aspects. In summary, rock outcrops controlled the SOC contents in the studied regions. The slope position, gradient and aspect influenced the composition and distribution of vegetation, which influenced the evolution of rocky desertification. Therefore, these factors indirectly affected the SOC content. Additionally, the SOCD decreased with increasing rocky desertification. During the different evolution stages of karst landforms, the SOC storage capacity first decreases, then increases.
英文关键词	soil organic carbon rocky desertification process vegetation spatial heterogeneity response mechanism different karst landforms
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000747802100001
WOS关键词	LAND-USE CHANGE ; STORAGE ; SEQUESTRATION ; PROVINCE ; IMPACT ; STRAW ; BASIN ; STOCK
WOS类目	Forestry
WOS研究方向	Forestry
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/376705
作者单位	[Wang, Xingfu; Huang, Xianfei; Xiong, Kangning; Hu, Jiwei] Guizhou Normal Univ, State Engn Technol, Sch Karst Sci, Inst Karst Desertficat Control, Guiyang 550001, Peoples R China; [Zhang, Zhenming] Guizhou Acad Sci, Inst Biol, Guiyang 550001, Peoples R China; [Zhang, Jiachun] Guizhou Bot Garden, Guiyang 550001, Peoples R China
推荐引用方式 GB/T 7714	Wang, Xingfu,Huang, Xianfei,Xiong, Kangning,et al. Mechanism and Evolution of Soil Organic Carbon Coupling with Rocky Desertification in South China Karst[J],2022,13(1).
APA	Wang, Xingfu,Huang, Xianfei,Xiong, Kangning,Hu, Jiwei,Zhang, Zhenming,&Zhang, Jiachun.(2022).Mechanism and Evolution of Soil Organic Carbon Coupling with Rocky Desertification in South China Karst.FORESTS,13(1).
MLA	Wang, Xingfu,et al."Mechanism and Evolution of Soil Organic Carbon Coupling with Rocky Desertification in South China Karst".FORESTS 13.1(2022).