干旱区生态环境知识资源中心(Arid): Losses and gains of soil organic carbon in grasslands in the Brazilian semi-arid region

Arid

DOI	10.1590/1678-992X-2019-0076
	Losses and gains of soil organic carbon in grasslands in the Brazilian semi-arid region
	Medeiros, Aldair de Souza; Ferreira Maia, Stoecio Malta; dos Santos, Thiago Candido; de Araujo Gomes, Tamara Claudia
通讯作者	Medeiros, AD
来源期刊	SCIENTIA AGRICOLA
ISSN	1678-992X
出版年	2021
卷号	78 期号:3
英文摘要	Studies show that soil organic carbon (SOC) decreases between 3 % and 9 % in degraded grasslands in tropical regions, mainly due to the absence of techniques to enhance carbon contribution to soils. This study assessed SOC stock change factors for grassland management, specific to the semi-arid region of Brazil. These factors may contribute to a better understanding of SOC dynamics and could be used to improve inventories on GHG emissions. In addition, they could be used for updating default factors used by the Intergovernmental Panel on Climate Change. This study considers both soil sampling and a literature review, and comprises 27 paired comparisons, where the dataset was analyzed using a mixed linear model. For the grassland in the Brazilian semi-arid region, the SOC stock is reduced by between 12 % and 27 % due to inadequate management, overgrazing, and edaphoclimatic conditions of the Brazilian semiarid. However, this depends on aspects, such as land use and soil layer, which represents substantially more severe losses than in other regions of the country. We also found that losses occur during the first five years after conversion of native vegetation. The results also indicated a trend for SOC stocks to recover over time, reaching 4 % after 30 years of use as grassland, probably related to the long period without soil tillage and the role of gramineas root system.
英文关键词	Caatinga soil organic matter management factors degraded grasslands
类型	Article
语种	英语
开放获取类型	DOAJ Gold
收录类别	SCI-E
WOS记录号	WOS:000537093900001
WOS关键词	GRAZING INTENSITY ; NITROGEN STOCKS ; MANAGEMENT ; FOREST ; IMPACTS ; SYSTEMS ; AGROFORESTRY ; VEGETATION ; RONDONIA ; PASTURES
WOS类目	Agriculture, Multidisciplinary
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/2XILL650/327908
作者单位	[Medeiros, Aldair de Souza; dos Santos, Thiago Candido] Univ Fed Alagoas, Ctr Ciencias Agr, Rod BR 104,Km 85,S-N, BR-57100000 Rio Largo, AL, Brazil; [Ferreira Maia, Stoecio Malta] Inst Fed Educ Ciencia & Tecnol Alagoas, R Lourival Alfredo 176, BR-57160000 Marechal Deodoro, AL, Brazil; [de Araujo Gomes, Tamara Claudia] Embrapa Tabuleiros Costeiros, Unidade Execucao Pesquisa & Desenvolvimento, Rod BR 104,Km 85,S-N, BR-57100000 Rio Largo, AL, Brazil
推荐引用方式 GB/T 7714	Medeiros, Aldair de Souza,Ferreira Maia, Stoecio Malta,dos Santos, Thiago Candido,et al. Losses and gains of soil organic carbon in grasslands in the Brazilian semi-arid region[J],2021,78(3).
APA	Medeiros, Aldair de Souza,Ferreira Maia, Stoecio Malta,dos Santos, Thiago Candido,&de Araujo Gomes, Tamara Claudia.(2021).Losses and gains of soil organic carbon in grasslands in the Brazilian semi-arid region.SCIENTIA AGRICOLA,78(3).
MLA	Medeiros, Aldair de Souza,et al."Losses and gains of soil organic carbon in grasslands in the Brazilian semi-arid region".SCIENTIA AGRICOLA 78.3(2021).