干旱区生态环境知识资源中心(Arid): Changes in soil labile and recalcitrant carbon pools after land-use change in a semi-arid agro-pastoral ecotone in Central Asia

Arid

DOI	10.1016/j.ecolind.2019.105925
	Changes in soil labile and recalcitrant carbon pools after land-use change in a semi-arid agro-pastoral ecotone in Central Asia
	Liu, Xiang 1,2,3; Chen, Ditao 2,3,4; Yang, Tao 2,3,4; Huang, Farong 2,3; Fu, Shuai 5; Li, Lanhai 2,3,4
通讯作者	Li, Lanhai
来源期刊	ECOLOGICAL INDICATORS
ISSN	1470-160X
EISSN	1872-7034
出版年	2020
卷号	110
英文摘要	Soil organic matter is a heterogeneous and complex entity that consists of a diverse range of compounds. However, the responses of soil organic carbon (SOC) fractions with different biochemical stabilities to land-use change are inadequately addressed. In this study, soil samples (0-60 cm) were collected with a 10 cm interval from grassland (GS), cropland (CS), woodland (WS), and orchard (OS) using paired-site approach in a typical semi-arid agro-pastoral ecotone in the Ili River Valley, Central Asia, to: (1) clarify the vertical changes in soil labile (LPI and LPII) and recalcitrant C pools (RP) after GS conversion to CS and CS conversion to WS and OS; and to (2) evaluate the impact of land-use change on SOC stability. The results indicated that LPI stocks in topsoil (0-30 cm) and subsoil (30-60 cm) showed opposite responses to land-use change. In contrast, LPII and RP stocks in both soil layers significantly decreased after conversion of GS to CS, and significantly increased after CS afforestation. These results demonstrated that RP in subsoils could also be altered by land-use change. In general, conversion from GS to CS decreased the recalcitrance index of SOC (RISOC), which increased after conversion from CS to WS. The results implied that cultivation decreased the stability of SOC, causing the depletion of SOC stock, whereas CS conversion to WS enhanced the stability of SOC, promoting SOC sequestration. The negative correlations between RISOC, pH, and electrical conductivity (EC1:5) suggested that soil pH and salinity were potential indicators reflecting the biochemical recalcitrance of SOC. Since both soil pH and EC1:5 showed decreasing trends after conversion from CS to WS and OS, the results suggested that afforestation on CS contributed to mitigate soil salinization while promoting SOC sequestration in this semi-arid agro-pastoral ecotone.
英文关键词	Land-use change Soil organic carbon Labile carbon pool Recalcitrant carbon pool Carbon sequestration Soil salinization
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000507381800075
WOS关键词	ORGANIC-CARBON ; USE CONVERSION ; CLIMATE-CHANGE ; PLANT INPUTS ; STOCKS ; MATTER ; SEQUESTRATION ; NITROGEN ; AFFORESTATION ; MANAGEMENT
WOS类目	Biodiversity Conservation ; Environmental Sciences
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
来源机构	中国科学院新疆生态与地理研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/314347
作者单位	1.Qinghai Univ, State Key Lab Plateau Ecol & Agr, Xining 810016, Peoples R China; 2.Chinese Acad Sci, Xinjiang Inst Ecol & Geog, State Key Lab Desert & Oasis Ecol, Urumqi 830011, Peoples R China; 3.Chinese Acad Sci, Yili Stn Watershed Ecosyst Res, Xinyuan 835800, Peoples R China; 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China; 5.Jiangxi Univ Finance & Econ, Sch Tourism & Urban Management, Nanchang 330013, Jiangxi, Peoples R China
推荐引用方式 GB/T 7714	Liu, Xiang,Chen, Ditao,Yang, Tao,et al. Changes in soil labile and recalcitrant carbon pools after land-use change in a semi-arid agro-pastoral ecotone in Central Asia[J]. 中国科学院新疆生态与地理研究所,2020,110.
APA	Liu, Xiang,Chen, Ditao,Yang, Tao,Huang, Farong,Fu, Shuai,&Li, Lanhai.(2020).Changes in soil labile and recalcitrant carbon pools after land-use change in a semi-arid agro-pastoral ecotone in Central Asia.ECOLOGICAL INDICATORS,110.
MLA	Liu, Xiang,et al."Changes in soil labile and recalcitrant carbon pools after land-use change in a semi-arid agro-pastoral ecotone in Central Asia".ECOLOGICAL INDICATORS 110(2020).