干旱区生态环境知识资源中心(Arid): Changes in soil organic carbon and soil aggregation due to deforestation for smallholder management in the Brazilian semi-arid region

Arid

DOI	10.1016/j.geodrs.2023.e00647
	Changes in soil organic carbon and soil aggregation due to deforestation for smallholder management in the Brazilian semi-arid region
	Medeiros, Aldair de Souza; Gonzaga, Giordano Bruno Medeiros; da Silva, Thamirys Suelle; Barreto, Bruno de Souza; dos Santos, Thiago Candidi; del Melo, Paul Lineker Amaral; Gomes, Tamata Claudia de Araujo; Maia, Stoecio Malta Ferreira
通讯作者	Medeiros, AD
来源期刊	GEODERMA REGIONAL
ISSN	2352-0094
出版年	2023
卷号	33
英文摘要	The Brazilian semi-arid region has currently approximately 33.3 million hectares occupied by agriculture, and the inadequate land use and management practices are still predominant, which have been associated with the soil degradation process. Therefore, the aims of this study were to evaluate the effect of conventional agricultural systems (cropland and pasture) on soil structure using water-stable aggregate and aggregation indexes, and to assess the impacts on soil organic carbon (SOC) stocks in different soil types and textures in the Brazilian semiarid region. The study was carried out in the municipalities of Delmiro Gouveia, Inhapi and Pariconha, in the Brazilian semi-arid region of the state of Alagoas, Brazil. Arenosols, Acrisols and Regosols soil samples were collected at 0-10, 10-20 and 20-30 cm layers. The treatments analyzed were: Cropland with 4, 15 and 30 years and pasture with 10 years. As a reference, native vegetation (Caatinga) was used. Our results show that the maintenance of SOC and structure and soil physical quality in conventional agricultural systems in the Brazilian semi-arid region depend on soil type/texture and climate. In agricultural systems in Acrisols with sandy clay loam texture, a 5.4% non significant increase was observed in SOC stocks after 30 years of use compared to SOC stocks in the native vegetation area; while in soils with sandy texture (Arenosols and Regosols), the SOC stocks were reduced by 16.1% in comparison to areas under native vegetation. The analysis of water-stable aggregate in Acrisols showed great predominance of macroaggregates (>2.0 mm). On the other hand, in sandy soils (Arenosols and Regosols), great predominance of mesoaggregates was observed (<2.00 and > 0.25 mm).
英文关键词	Caatinga CO2 emissions Conventional tillage Multiple soil classes Water-stable aggregate
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001006912500001
WOS关键词	NITROGEN STOCKS ; SYSTEMS ; TILLAGE ; MATTER ; STABILIZATION ; AGROFORESTRY ; PERNAMBUCO ; FRACTIONS ; TEMPERATE ; DYNAMICS
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/2XILL650/396706
推荐引用方式 GB/T 7714	Medeiros, Aldair de Souza,Gonzaga, Giordano Bruno Medeiros,da Silva, Thamirys Suelle,et al. Changes in soil organic carbon and soil aggregation due to deforestation for smallholder management in the Brazilian semi-arid region[J],2023,33.
APA	Medeiros, Aldair de Souza.,Gonzaga, Giordano Bruno Medeiros.,da Silva, Thamirys Suelle.,Barreto, Bruno de Souza.,dos Santos, Thiago Candidi.,...&Maia, Stoecio Malta Ferreira.(2023).Changes in soil organic carbon and soil aggregation due to deforestation for smallholder management in the Brazilian semi-arid region.GEODERMA REGIONAL,33.
MLA	Medeiros, Aldair de Souza,et al."Changes in soil organic carbon and soil aggregation due to deforestation for smallholder management in the Brazilian semi-arid region".GEODERMA REGIONAL 33(2023).