干旱区生态环境知识资源中心(Arid): Changes in the Soil Labile Organic Carbon Fractions following Bedrock Exposure Rate in a Karst Context

Arid

DOI	10.3390/f13040516
	Changes in the Soil Labile Organic Carbon Fractions following Bedrock Exposure Rate in a Karst Context
	Zheng, Wei; Rao, Chengjiao; Wu, Qian; Wang, Enwen; Jiang, Xingjian; Xu, Yichen; Hu, Lei; Chen, Yazhen; Liang, Xiaocui; Yan, Wende
通讯作者	Yan, WD
来源期刊	FORESTS
EISSN	1999-4907
出版年	2022
卷号	13 期号:4
英文摘要	Soil labile organic carbon fractions (SLOCFs) mainly include microbial biomass carbon (MBC), dissolved organic carbon (DOC), easily oxidized organic carbon (EOC) and light fraction organic carbon (LFOC). The link between bedrock exposure rates with SLOCFs and the carbon pool management index under karst rocky desertification has not been well understood. We selected the bedrock exposure rate and vegetation coverage of 30-50% (light bedrock exposure, LBE), 50-70% (moderate bedrock exposure, MBE) and >70% (intense bedrock exposure, IBE) as the experimental sample plots according to the classification standard of karst rocky desertification, and then selected a sample plot of 0-30% (secondary forest, SF) as the control. This study compared the concentrations and stocks of soil organic carbon (SOC) and SLOCFs and analyzed the relevant carbon pool management index on karst landforms at Anshun, S.W. China. The aims were to determine the relationship between bedrock exposure rates and SLOCFs and to identify the most limiting factors for SLOCFs in karst rocky desertification areas. We found that (1) the concentrations and stocks of SLOCFs declined with increasing soil depth. SOC, DOC and MBC showed IBE > LBE > MBE > SF; LFOC decreased with increasing bedrock exposure rate, and EOC did not show obvious regularity. (2) The carbon pool management index and sensitivity index had significant differences under different bedrock exposure rates. Redundancy analysis and linear regression showed that the increase in bedrock exposure rate had a great impact on MBC, DOC, EOC and SOC. In conclusion, the increase of bedrock exposure rate has no side impact on the DOC, EOC and MBC of the soil, but side effects are exhibited by LFOC. Secondary forest improves the integrity of karst landscapes, and does not change the soil properties as well as the concentrations and stocks of SLOCFs in karst rocky desertification areas.
英文关键词	karst rocky desertification soil labile organic carbon fractions carbon pool management index soil quality
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:000785169200001
WOS关键词	VEGETATION RESTORATION STRATEGIES ; BARE SLOPES ; LAND-USE ; STOCKS ; MATTER ; AREA ; SEQUESTRATION ; ACCUMULATION ; SUCCESSION ; RESPONSES
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/2XILL650/392614
推荐引用方式 GB/T 7714	Zheng, Wei,Rao, Chengjiao,Wu, Qian,et al. Changes in the Soil Labile Organic Carbon Fractions following Bedrock Exposure Rate in a Karst Context[J],2022,13(4).
APA	Zheng, Wei.,Rao, Chengjiao.,Wu, Qian.,Wang, Enwen.,Jiang, Xingjian.,...&Yan, Wende.(2022).Changes in the Soil Labile Organic Carbon Fractions following Bedrock Exposure Rate in a Karst Context.FORESTS,13(4).
MLA	Zheng, Wei,et al."Changes in the Soil Labile Organic Carbon Fractions following Bedrock Exposure Rate in a Karst Context".FORESTS 13.4(2022).