干旱区生态环境知识资源中心(Arid): Organic farming improves soil carbon pools and aggregation of sandy soils in the Brazilian semi-arid region

Arid

DOI	10.1111/sum.13097
	Organic farming improves soil carbon pools and aggregation of sandy soils in the Brazilian semi-arid region
	de Alencar, Guilherme Viana; Gomes, Lucas Carvalho; Barros, Vanessa Maria de Souza; Escobar, Maria Eugenia Ortiz; de Oliveira, Teogenes Senna; Mendonca, Eduardo de Sa
通讯作者	Gomes, LC
来源期刊	SOIL USE AND MANAGEMENT
ISSN	0266-0032
EISSN	1475-2743
出版年	2024
卷号	40 期号:3
英文摘要	Organic agriculture can be a feasible alternative to improve soil organic carbon contents, but its effects on different carbon pools and the benefits for soil quality in sandy soils of warm climates are still poorly understood. This study aimed to assess the influence of organic and conventional farming systems on carbon pools, and its effects on soil chemical, physical, and biological quality in sandy soils of a semi-arid region in northeastern Brazil. The experiment was conducted at three sites with different soil managements and adjacent natural vegetations in the municipality of Guaraciaba do Norte, Cear & aacute;, Brazil. Four soil profiles were opened, and soil samples were collected from 0 to 1 m depth for soil chemical analysis, and undisturbed soil samples from 0 to 40 cm depth for soil physical and micromorphological analysis. Organic management led to an increase in total organic carbon (from 7.34 to 20.47 g kg-1) at the 0-0.10 m depth, especially in the labile fraction. There was also a threefold increase in cation exchange capacity and up to a fourfold increase in P content in the soil surface layers. Additionally, organic systems led to better soil structure, porosity, and stability, as evidenced by an increase in the average diameter of soil aggregates. Within the aggregates, we found 240% more total organic carbon and 170% more total nitrogen in organic compared to conventional soil management. Micromorphological analysis allowed us to observe that soils under forestry and organic management have coarse quartz grains either totally or partially coated with clay by organic assemblage, while under conventional cultivation, there were reduced amounts of organic assemblages in the spaces between sand grains. Thus, organic farming is seen as a suitable practice for soil organic carbon formation in a short space of time (6 years), contributing to improving soil chemical quality and aggregation in sandy soils in semi-arid northeastern Brazil.
英文关键词	cropping systems labile carbon micromorphology organic agriculture
类型	Article
语种	英语
开放获取类型	hybrid
收录类别	SCI-E
WOS记录号	WOS:001278454000001
WOS关键词	MICROBIAL BIOMASS ; BIOCHEMICAL-PROPERTIES ; PHYSICAL-PROPERTIES ; MATTER FRACTIONS ; TEMPORAL-CHANGES ; SYSTEMS ; TILLAGE ; QUALITY ; MANAGEMENT ; PRODUCTIVITY
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/2XILL650/405667
推荐引用方式 GB/T 7714	de Alencar, Guilherme Viana,Gomes, Lucas Carvalho,Barros, Vanessa Maria de Souza,et al. Organic farming improves soil carbon pools and aggregation of sandy soils in the Brazilian semi-arid region[J],2024,40(3).
APA	de Alencar, Guilherme Viana,Gomes, Lucas Carvalho,Barros, Vanessa Maria de Souza,Escobar, Maria Eugenia Ortiz,de Oliveira, Teogenes Senna,&Mendonca, Eduardo de Sa.(2024).Organic farming improves soil carbon pools and aggregation of sandy soils in the Brazilian semi-arid region.SOIL USE AND MANAGEMENT,40(3).
MLA	de Alencar, Guilherme Viana,et al."Organic farming improves soil carbon pools and aggregation of sandy soils in the Brazilian semi-arid region".SOIL USE AND MANAGEMENT 40.3(2024).