干旱区生态环境知识资源中心(Arid): Comparative assessment of soil health attributes between topsoil and subsoil influenced by long-term wastewater irrigation

Arid

DOI	10.1016/j.agwat.2024.109012
	Comparative assessment of soil health attributes between topsoil and subsoil influenced by long-term wastewater irrigation
	Rezapour, Salar; Asadzadeh, Farrokh; Heidari, Mohammad
通讯作者	Rezapour, S
来源期刊	AGRICULTURAL WATER MANAGEMENT
ISSN	0378-3774
EISSN	1873-2283
出版年	2024
卷号	302
英文摘要	The reuse of wastewater (WW) for crop irrigation is increasingly recognized as an alternative to freshwater irrigation in arid and semi-arid regions. However, there is a significant gap in knowledge regarding the soil health index (SHI) and factors influencing topsoil and subsoil in cropland under long-term WW irrigation. This study aimed to comparatively assess soil health attributes between topsoil and subsoil in smallholder farmlands that have been irrigated with WW for over 50 years. This assessment utilized a combination of soil physicochemical and fertility attributes, along with heavy metal concentrations. The soil health index (SHI) was developed using linear (SHI - L) and nonlinear (SHI - NL) models, based on the Total Data Set (TDS) and Minimum Data Set (MDS). Statistically significant differences (P <= 0.05) were observed between topsoil and subsoil for the soil stability index (SSI), organic matter (SOM), calcium carbonate equivalent (CCE), electrical conductivity (EC), sodium adsorption ratio (SAR), macro- and micronutrients, and heavy metals (Zn, Cu, Cd, Pb, and Ni). In contrast, soil bulk density (BD), pH, and cation exchange capacity (CEC) did not show significant differences. The mean SHI - L and SHI - NL values ranged from 0.68 to 0.77 and 0.46-0.53 for topsoil, and from 0.66 to 0.74 and 0.45-0.51 for subsoil, respectively. The SHI values were higher in the topsoil, with increases ranging from 2.3 % to 7.1 % for SHI - L and 0.65-11.3 % for SHI - NL compared to the subsoil. The regression coefficients between SHIs and corn yield were higher in the topsoil (0.46-0.49) than in the subsoil (0.20-0.22). Furthermore, the SHI - NL model demonstrated greater precision than the SHI - L model in predicting corn yield in both soil depths. These findings highlight the effectiveness of SHI assessments, particularly the SHI - NL model, in analyzing changes in soil health indices with depth and their relationship with crop performance in long-term WW-irrigated smallholder farmlands. This research provides valuable insights into addressing soil health challenges in similar agricultural systems.
英文关键词	Soil health index Soil health indicator Smallholders' farm Wastewater irrigation Crop productivity
类型	Article
语种	英语
开放获取类型	hybrid
收录类别	SCI-E
WOS记录号	WOS:001297860700001
WOS关键词	MANAGEMENT-PRACTICES ; QUALITY ; FRAMEWORK
WOS类目	Agronomy ; Water Resources
WOS研究方向	Agriculture ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/402689
推荐引用方式 GB/T 7714	Rezapour, Salar,Asadzadeh, Farrokh,Heidari, Mohammad. Comparative assessment of soil health attributes between topsoil and subsoil influenced by long-term wastewater irrigation[J],2024,302.
APA	Rezapour, Salar,Asadzadeh, Farrokh,&Heidari, Mohammad.(2024).Comparative assessment of soil health attributes between topsoil and subsoil influenced by long-term wastewater irrigation.AGRICULTURAL WATER MANAGEMENT,302.
MLA	Rezapour, Salar,et al."Comparative assessment of soil health attributes between topsoil and subsoil influenced by long-term wastewater irrigation".AGRICULTURAL WATER MANAGEMENT 302(2024).