The Optimal Layout Strategy for Subsurface Pipes to Improve Soil Desalination and Increase Crop Yield: A Meta‐Analysis

作者：Yang Yang, Chang Ao, Yi Liu, Yutian Zuo, Wenzhi Zeng, Weimin Xing, Jiesheng Huang · 发表于：Land Degradation and Development · 年份：2024 · DOI：10.1002/ldr.5430 · 被引用次数：6 · 研究领域：Soil and Unsaturated Flow、Plant responses to water stress、Irrigation Practices and Water Management

ABSTRACT Subsurface drainage systems are now used in various fields to control soil salinity, manage the water table, and increase crop yields by discharging groundwater and excess water from the soil. However, few studies have compared the effects of subsurface drainage systems on soil salinity and crop yield of different soil and climatic environments. Therefore, this study synthesized 891 experiments from 57 screened papers spanning 1979 to 2024. The results showed that fields with subsurface drainage system significantly reduced soil salinity by 25.56% and increased crop yield by 20.28% ( p < 0.05) compared to fields without such systems. Other physicochemical properties of the soil showed a significant decrease ( p < 0.05) in the ionic content of CO 3 2− , HCO 3 − , Na + , etc., and a significant increase ( p < 0.05) in soil permeability. This study found that subsurface drainage systems had a significant ( p < 0.05) effect on soil desalination and yield increase in most soils and climates. Comparatively better desalination was achieved in weakly alkaline saline soils with medium sand content and high salt content than in areas without such systems. Subsurface drainage significantly reduced soil salinity and increased yield in both dryland and paddy fields ( p < 0.05), while the effects on soil desalination and yield improvement were more significant in paddy fields. Additionally, this study suggests that in humid climates, the subsurface drainage system l...