干旱区生态环境知识资源中心(Arid): Soil organic matter fractions under different land uses and soil classes in the Brazilian semi-arid region

Arid

DOI	10.1071/SR23087
	Soil organic matter fractions under different land uses and soil classes in the Brazilian semi-arid region
	dos Santos, Crislany Canuto; Medeiros, Aldair de Souza; Araujo, Victor Matheus Ferreira de; Maia, Stoecio Malta Ferreira
通讯作者	dos Santos, CC
来源期刊	SOIL RESEARCH
ISSN	1838-675X
EISSN	1838-6768
出版年	2023
卷号	61 期号:8 页码:817-830
英文摘要	Context Land use change (LUC) is considered one of the main factors associated with soil carbon (C) loss worldwide.Aim Evaluate changes in labile and non-labile soil organic matter (SOM) fractions in different land use systems - native vegetation (NV), agriculture with conventional cultivation (CC) and pasture (PA) - in five soil classes in the Brazilian semi-arid region.Methods Soil samples were collected to a depth of 100 cm, and soil C and nitrogen (N) content and stocks were determined and also stocks of labile (LC) and non-labile (NlC) C fractions. In addition, the Carbon Management Index (CMI) was used to evaluate soil health changes.Key results SOC stocks significantly decreased after conversion from NV to CC (by 23%; 0-30 cm) and PA (by 22%; 0-100 cm). Losses due to LUC were greater in the LC than the NlC fraction, and this was reflected in the CMI reducing by 37% for PA and 57% for CC in the 0-100 cm layer. Regarding the different soil classes, LUC reduced SOC stocks only in the Luvisol, Planosol and Leptosol classes, while in the LC fraction, changes were observed in Acrisols, Cambisols and Planosols.Conclusions Clearing NV areas for CC systems and PA reduced the SOC stocks and SOM fractions and, consequently, decreased soil quality.Implications These findings underscore the importance of considering the quality of SOM when evaluating LUC impacts on SOC stocks in the different classes of soil in the Brazilian semi-arid region.
英文关键词	carbon management index labile carbon land use effects on soil semiarid soils soil health soil organic carbon soil taxonomy tropical dry forest
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001048407100001
WOS关键词	GLOBAL CLIMATE-CHANGE ; CARBON STOCKS ; NITROGEN STOCKS ; DRY FOREST ; DYNAMICS ; PASTURE ; POOLS ; TILLAGE ; SYSTEMS
WOS类目	Soil Science
WOS研究方向	Agriculture
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/398676
推荐引用方式 GB/T 7714	dos Santos, Crislany Canuto,Medeiros, Aldair de Souza,Araujo, Victor Matheus Ferreira de,et al. Soil organic matter fractions under different land uses and soil classes in the Brazilian semi-arid region[J],2023,61(8):817-830.
APA	dos Santos, Crislany Canuto,Medeiros, Aldair de Souza,Araujo, Victor Matheus Ferreira de,&Maia, Stoecio Malta Ferreira.(2023).Soil organic matter fractions under different land uses and soil classes in the Brazilian semi-arid region.SOIL RESEARCH,61(8),817-830.
MLA	dos Santos, Crislany Canuto,et al."Soil organic matter fractions under different land uses and soil classes in the Brazilian semi-arid region".SOIL RESEARCH 61.8(2023):817-830.