干旱区生态环境知识资源中心(Arid): An alternative method to measure electrical conductivity (EC) and sodium adsorption ratio (SAR) in salt-affected soil extracts

Arid

DOI	10.3389/fenvs.2023.1108272
	An alternative method to measure electrical conductivity (EC) and sodium adsorption ratio (SAR) in salt-affected soil extracts
	Torres, Beverly Alvarez; Ramirez, David R. Sotomayor; Chacon, Jose Pablo Castro; Rodriguez, Gustavo Martinez; Alegria, Luis R. Perez; Desutter, Thomas M.
通讯作者	Ramírez, DRS
来源期刊	FRONTIERS IN ENVIRONMENTAL SCIENCE
EISSN	2296-665X
出版年	2023
卷号	11
英文摘要	Soil degradation due to salts affects over 100 countries, especially in arid and semi-arid regions where salts migrate to the plant root zone via capillary action when evapotranspiration exceeds rainfall. Soil salinity reduces germination, growth, and root development, impacting crop yields, while excess sodium decreases water movement into the soil. Soil properties, namely, electrical conductivity (ECe), sodium adsorption ratio (SARe), and pH (pHe), affected by sparingly and soluble salts, are typically analyzed using soil saturated paste (SP). However, a simpler and cost-effective alternative is assessing soil salinity using soil:water solutions at ratio 1:5 (SW). This study developed empirical models between EC1:5-ECe, SAR(1:5)-SARe, and pH(1:5)-pHe to monitor soil salinity and sodicity in Lajas Valley, Puerto Rico, an agricultural reserve with 1,140 mm of mean annual rainfall and soils classified as saline and/or sodic. The ECe Sampling, Assessment, and Prediction software for Response Surface Sampling Design (ESAP-RSSD) optimized soil sampling with 48 points. Measurements of EC, pH, cations (Ca2+, Mg2+, Na+), and SAR were conducted using SP and 1:5 SW extracts. Simple linear regression models estimated ECe (R-2 > 0.93, p < 0.0001) and SARe (R-2 > 0.98, p < 0.0001) from 1:5 extracts. The pHe models varied with depth, showing a strong correlation (R-2 > 0.62, p < 0.0001) from 0 to 30 cm and weakening (R-2 > 0.27, p < 0.0022) from 90 to 120 cm. The simple linear regression models generally perform well for EC and pH variables, with better performance observed at shallower depths. SW proves to be a practical, cost-effective, and efficient method for assessing salt-affected soils in Lajas Valley. By enabling regular soil salinity analysis, the developed estimation models combined with SW extraction could improve soil management practices and agricultural productivity.
英文关键词	electrical conductivity salinity salt-affected soils saturated paste extract sodicity sodium adsorption ratio soil:water extract
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:001068577700001
WOS关键词	SATURATED PASTE
WOS类目	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/2XILL650/396523
推荐引用方式 GB/T 7714	Torres, Beverly Alvarez,Ramirez, David R. Sotomayor,Chacon, Jose Pablo Castro,et al. An alternative method to measure electrical conductivity (EC) and sodium adsorption ratio (SAR) in salt-affected soil extracts[J],2023,11.
APA	Torres, Beverly Alvarez,Ramirez, David R. Sotomayor,Chacon, Jose Pablo Castro,Rodriguez, Gustavo Martinez,Alegria, Luis R. Perez,&Desutter, Thomas M..(2023).An alternative method to measure electrical conductivity (EC) and sodium adsorption ratio (SAR) in salt-affected soil extracts.FRONTIERS IN ENVIRONMENTAL SCIENCE,11.
MLA	Torres, Beverly Alvarez,et al."An alternative method to measure electrical conductivity (EC) and sodium adsorption ratio (SAR) in salt-affected soil extracts".FRONTIERS IN ENVIRONMENTAL SCIENCE 11(2023).