干旱区生态环境知识资源中心(Arid): Changes in organic carbon and microbiology community structure due to long-term irrigated agriculture on Luvisols in the Brazilian semi-arid region

Arid

DOI	10.1016/j.catena.2022.106058
	Changes in organic carbon and microbiology community structure due to long-term irrigated agriculture on Luvisols in the Brazilian semi-arid region
	Sousa, Marilya Gabryella; Araujo, Jane Kelly Silva; Fracetto, Giselle Gomes Monteiro; Ferreira, Tiago Osorio; Fracetto, Felipe Jose Cury; Filho, Jose Coelho de Araujo; Otero, Xose Lios; Santos, Jean Cheyson Barros dos; da Silva, Artur Henrique Nascimento; de Souza Junior, Valdomiro Severino
通讯作者	de Souza, JVS
来源期刊	CATENA
ISSN	0341-8162
EISSN	1872-6887
出版年	2022
卷号	212
英文摘要	Changes in the global water cycle affect irrigation requirements and soil processes as well as the structure of soil microbial communities and function and the carbon (C) balance. The microbial structure and C sequestration under land use changing scenarios are rarely studied in the semi-arid region of Brazil. Here, we assessed the effects of land-use changes (irrigation and cultivation) on C storage in the soil and the structure of total bacteria (16S rRNA gene profile) and fungus (18S rRNA gene profile) at soil depth. We evaluated two soil profiles in the semi-arid region in northeastern Brazil. Profile P1 in an area with long-term irrigation (1,500 mm of water per year) and cultivation (small-scale farming systems, mainly with subsistence crops, which is a frequent land use system in the region of irrigated soil) for about 26 years. Profile P2 under natural conditions with 400 mm of water per year of rainfall (rain-fed hyperxerophilic Caatinga). Land-use changes showed a small influence on C storage; however, the changes strongly affected the soil organic matter (SOM) quality as well as the bacterial and fungal community structure, indicated by higher contents of labile-C and microbial biomass along with lower C-CO2 emission. The relatively large amounts of aliphatic groups in the soil surface and subsurface in the cropped system (P1) suggested enrichment of methylene structures and probable increase of microbial-derived compounds. Methoxylic and aromatic groups tend to increase at depth (Bt horizon) indicating that the subsoil C responds to soil management changes. The structures of the bacterial community are distinct at depth in P1 and more similar at depth in P2. On the other hand, the structures of the fungal communities are more similar at depth in P1 than in P2. Furthermore, the irrigated agriculture also presented a carbon management index greater than 140% in most horizons, indicating that the soil management system did not cause soil degradation.
英文关键词	Chromic Luvisol DGGE Land use Microorganism Soil management system
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000790451600002
WOS关键词	WASTE-WATER IRRIGATION ; VERTICAL-DISTRIBUTION ; FUNGAL COMMUNITIES ; SUBSOIL HORIZONS ; CLIMATE-CHANGE ; SOIL ; MATTER ; STOCKS ; SEQUESTRATION ; STABILIZATION
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/2XILL650/392085
推荐引用方式 GB/T 7714	Sousa, Marilya Gabryella,Araujo, Jane Kelly Silva,Fracetto, Giselle Gomes Monteiro,et al. Changes in organic carbon and microbiology community structure due to long-term irrigated agriculture on Luvisols in the Brazilian semi-arid region[J],2022,212.
APA	Sousa, Marilya Gabryella.,Araujo, Jane Kelly Silva.,Fracetto, Giselle Gomes Monteiro.,Ferreira, Tiago Osorio.,Fracetto, Felipe Jose Cury.,...&de Souza Junior, Valdomiro Severino.(2022).Changes in organic carbon and microbiology community structure due to long-term irrigated agriculture on Luvisols in the Brazilian semi-arid region.CATENA,212.
MLA	Sousa, Marilya Gabryella,et al."Changes in organic carbon and microbiology community structure due to long-term irrigated agriculture on Luvisols in the Brazilian semi-arid region".CATENA 212(2022).