干旱区生态环境知识资源中心(Arid): Original Assessment of soil salinity status under different land-use conditions in the semiarid region of Northeastern Brazil

Arid

DOI	10.1016/j.ecolind.2022.109139
	Original Assessment of soil salinity status under different land-use conditions in the semiarid region of Northeastern Brazil
	Pessoa, Luiz G. M.; Freire, Maria B. G. dos S.; Green, Colleen H. M.; Miranda, Marcio F. A.; Filho, Jose C. de A.; Pessoa, Wagner R. L. S.
通讯作者	Pessoa, LGM
来源期刊	ECOLOGICAL INDICATORS
ISSN	1470-160X
EISSN	1872-7034
出版年	2022
卷号	141
英文摘要	Soil salinization and sodification, caused by inadequate land management, is one of the main threats to the semiarid agroecosystems. It is essential to investigate saline levels under different land-use conditions to maintain the sustainability of agricultural production. The main objective of this study was to diagnose the salinity status of the soil in different land-use conditions in the semiarid region of Northeast Brazil. Soil samples were collected in the surface layer (0-5 cm) of three different land-use conditions: areas of low salinity (native vegetation - Caatinga), areas of different saline levels (cultivated areas), and areas of very high salinity (desertified by salinity), and compared regarding the chemical attributes of the soils by descriptive and multi-variate analysis. The results showed that sodium and chloride were the predominant soluble ions in cultivated and desertified areas due to saline waters commonly used in the study region. Increases in electrical conductivity values of 1219 and 23207% were observed for cultivated and desertified areas, respectively, compared to areas of native vegetation. The principal component analysis contributed to identifying parameters responsible for the variation in soil salinity, and the second factor identified that percentage of exchangeable sodium, electrical conductivity, and exchangeable and soluble sodium plays an essential role in soil desertification. However, calcium, magnesium, sodium, and chloride ions correlated positively with variables that degrade soils -EC, ESP, and SAR. We also found that in desertified areas, in addition to chloride, sulfate is also present in expressive levels, and due to the strong associations with calcium, magnesium, and sodium, our study suggests that in addition to the free forms of these ions, the forms of chlorides and sulfates of calcium, magnesium, and sodium also effectively contribute to the degradation of the areas. The combination of multivariate analysis x geochemistry x laboratory techniques was a valuable tool to identify and monitor saline levels in converting uncultivated to cultivated areas and from cultivated areas to desertified areas.
英文关键词	Saline soils Sodic soils Climate change Soil management Soil degradation
类型	Article
语种	英语
开放获取类型	Green Published, gold
收录类别	SCI-E
WOS记录号	WOS:000870309200006
WOS关键词	SALT-AFFECTED SOILS ; SALINIZATION ; IONS ; DYNAMICS ; SODICITY ; GROWTH
WOS类目	Biodiversity Conservation ; Environmental Sciences
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/392330
推荐引用方式 GB/T 7714	Pessoa, Luiz G. M.,Freire, Maria B. G. dos S.,Green, Colleen H. M.,et al. Original Assessment of soil salinity status under different land-use conditions in the semiarid region of Northeastern Brazil[J],2022,141.
APA	Pessoa, Luiz G. M.,Freire, Maria B. G. dos S.,Green, Colleen H. M.,Miranda, Marcio F. A.,Filho, Jose C. de A.,&Pessoa, Wagner R. L. S..(2022).Original Assessment of soil salinity status under different land-use conditions in the semiarid region of Northeastern Brazil.ECOLOGICAL INDICATORS,141.
MLA	Pessoa, Luiz G. M.,et al."Original Assessment of soil salinity status under different land-use conditions in the semiarid region of Northeastern Brazil".ECOLOGICAL INDICATORS 141(2022).