干旱区生态环境知识资源中心(Arid): Organic matter pools in a fluvisol after 29 years under different land uses in an irrigation region in northeast Brazil

Arid

DOI	10.1016/j.jaridenv.2022.104861
	Organic matter pools in a fluvisol after 29 years under different land uses in an irrigation region in northeast Brazil
	Lacerda, Nilda Braga de; Lustosa Filho, Jose Ferreira; Blum, Susana Churka; Escobar, Maria Eugenia Ortiz; Oliveira, Teogenes Sennav de
通讯作者	Lustosa, JF
来源期刊	JOURNAL OF ARID ENVIRONMENTS
ISSN	0140-1963
EISSN	1095-922X
出版年	2023
卷号	208
英文摘要	Soil organic matter (SOM) is a critical component of the soil system and a sensitive indicator of soil quality. We aimed to investigate the response of SOM pools to different land uses and management in irrigated croplands of the semi-arid region of northeast Brazil. Four sites irrigated under long-term (29 years) land uses were selected: banana (B1 and B2); elephant grass (EG) -perennial systems; maize and cowpea succession (MCP) -annual system; B1 was cropped for 17 years +2 years of maize and cowpea +17 years banana, while B2 was continu-ously cropped. A native forest (NF) site was selected as reference of steady state. Soil samples were collected at four depths in the rows and inter-rows of each management system. The higher decline in SOM fractions was perceived at 0-0.05 m depth and microbial indices (microbial biomass C and N, and basal respiration and metabolic quotient) were very sensitive indicators of soil quality. Perennial systems (B1 and EG) maintained the C and N stocks at higher levels equivalent to NF at the 0-0.40 m layer, while MCP and B2 had lower total organic carbon (TOC) (15 and 17%, respectively) and total nitrogen stocks (4.27 and 8.67%, respectively). Perennial cultivation with B1 and EG showed also the highest soil C and N microbial biomass and stratification ratio and, the lowest respiratory quotients, all indications of elevated soil C sequestration. In general, land use change from native forest to annual crops reduced plant residue input and increased soil disturbance, favoring higher SOM mineralization, while perennial crops and grasses were the most effective in increasing C and N stocks due to the maintenance of crop residues on the soil surface and the absence of soil tillage.
英文关键词	Soil quality Alluvial soils Smallholding agriculture C fractions Carbon management index Stratification ratio
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000868729400003
WOS关键词	SOIL MICROBIAL BIOMASS ; CARBON STOCKS ; SEMIARID REGION ; NITROGEN ; MANAGEMENT ; FRACTIONS ; SEQUESTRATION ; PASTURES ; QUALITY ; ROOT
WOS类目	Ecology ; Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/397133
推荐引用方式 GB/T 7714	Lacerda, Nilda Braga de,Lustosa Filho, Jose Ferreira,Blum, Susana Churka,et al. Organic matter pools in a fluvisol after 29 years under different land uses in an irrigation region in northeast Brazil[J],2023,208.
APA	Lacerda, Nilda Braga de,Lustosa Filho, Jose Ferreira,Blum, Susana Churka,Escobar, Maria Eugenia Ortiz,&Oliveira, Teogenes Sennav de.(2023).Organic matter pools in a fluvisol after 29 years under different land uses in an irrigation region in northeast Brazil.JOURNAL OF ARID ENVIRONMENTS,208.
MLA	Lacerda, Nilda Braga de,et al."Organic matter pools in a fluvisol after 29 years under different land uses in an irrigation region in northeast Brazil".JOURNAL OF ARID ENVIRONMENTS 208(2023).