干旱区生态环境知识资源中心(Arid): Soil organic carbon stock in arid and semi-arid steppe rangelands of North Africa

Arid

DOI	10.1016/j.catena.2021.106004
	Soil organic carbon stock in arid and semi-arid steppe rangelands of North Africa
	Chenchouni, Haroun; Neffar, Souad
通讯作者	Neffar, S
来源期刊	CATENA
ISSN	0341-8162
EISSN	1872-6887
出版年	2022
卷号	211
英文摘要	The assessment of soil organic carbon stock (SOCS) in degraded and rehabilitated soils in steppelands and rangelands of North Africa is crucial for the adoption of adequate management strategies that respond to sustainable development. This study aimed to estimate the SOCS in the surface layer of soils rehabilitated by prickly pear plantations (PPP) and analyze the effects of edaphic factors controlling the variation of SOCS in old PPP (OPPP), young PPP (YPPP) and control plots (unplanted plots). Under arid and semi-arid climates, three steppe sites were sampled in which three plots with OPPP (age = 10-20 years), YPPP (age < 5 years) and controls plots were considered. In each plot, five quadrats were delimited and within each quadrat, two pedological profiles were dug to collect soil samples. The determined parameters were soil organic carbon (SOC), bulk density (BD), pH, electrical conductivity (EC) and total calcium carbonate. The averages of SOCS varied between 14.51 +/- 11.03 t/ha (min-max: 0.09-35.88 t/ha) under arid climate and 17.32 +/- 9.05 t/ha (range: 0.26-41.84 t/ha) under semi-arid climate. The variations of SOCS were significant (P = 0.002) between the type of steppe managements but not significant (P > 0.05) among climate zones. Generally, the control plots and OPPP stored more carbon (14-19 t/ha) than steppes with YPPP (11-14 t/ha). SOCS varied significantly with changes in soil depths, it reached 27 t/ha at 15 cm and dropped to 10-18 t/ha at 20 cm. Regardless of the type of climate and rangeland management, SOCS evolved with BD and soil organic matter. This study estimated for the first time the SOCS in soils of degraded steppe rangelands in North Africa. Even if the SOCS remains low degraded steppes rangelands, it is necessary to avoid the loss of SOC in these ecosystems. The adoption of conservation agricultural practices, e.g. organic matter addition and reduced tillage techniques can increase SOC levels in these ecosystems.
英文关键词	Algerian steppes Carbon sequestration Desertification Land reclamation Opuntia ficus-indica Soil properties
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000790436600002
WOS关键词	AGRICULTURAL SOILS ; SPATIAL-DISTRIBUTION ; MATTER DYNAMICS ; RAIN-FOREST ; LAND-USE ; SEQUESTRATION ; VARIABILITY ; VEGETATION ; DECOMPOSITION ; ACCUMULATION
WOS类目	Geosciences, Multidisciplinary ; Soil Science ; Water Resources
WOS研究方向	Geology ; Agriculture ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/392079
推荐引用方式 GB/T 7714	Chenchouni, Haroun,Neffar, Souad. Soil organic carbon stock in arid and semi-arid steppe rangelands of North Africa[J],2022,211.
APA	Chenchouni, Haroun,&Neffar, Souad.(2022).Soil organic carbon stock in arid and semi-arid steppe rangelands of North Africa.CATENA,211.
MLA	Chenchouni, Haroun,et al."Soil organic carbon stock in arid and semi-arid steppe rangelands of North Africa".CATENA 211(2022).