Land-use practice shift in the wetland riparian zone can influence groundwater table (GWT) fluctuations and salts dynamics, potentially leading to soil salinization. The risk of soil salinization linked with high water tables could be better managed by using high growing capacity and deep-rooted phreatophytic vegetation via the 'biodrainage' approach. We evaluated the impacts of short rotation willow (SRW; Salix dasyclados Wimm.) plantation on soil and groundwater salinity linked to shallow GWT fluctuations and compared with adjacent annual crop (AC) and pasture (PA) in a field experiment. Groundwater salinity (EC_gw) along with depth to GWT and soil salinity (EC_soil at 0–60 cm depth) were measured along transects within each land-use practice in two Prairie Pothole Region (PPR) wetland sites (A and B). The variations in EC_gw were significant (p < 0.05) across land-uses; however, inconsistent in both sites. The positive correlation with EC_gw, EC_soil, and total dissolved salts (TDS) indicated higher salinity and salt accumulation with increased depth to GWT in both sites. The EC_soil varied significantly (p < 0.05) among land-use practices; however, land-use patterns were not consistent in both sites. Throughout the experimentation, site B consistently exhibited higher EC_soil (two-fold) than site A. We observed a decreasing inclination in EC_soil with increasing SRW biomass at both depths (i.e., 0–30 and 30–60 cm) and vice versa. This study refines our knowledge of SRW plantation-linked potential hydrological alteration and its implication on salinity, which provides a critical context for degraded marginal riparian wetland soil management in the PPR.

中文翻译：

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草原坑洼退化的边缘河岸土地上的短期轮作柳树：管理土壤盐分的潜在土地利用实践

湿地河岸带土地利用实践的转变会影响地下水位 (GWT) 波动和盐分动态，可能导致土壤盐渍化。通过“生物排水”方法使用高生长能力和根深蒂固的水生植物，可以更好地管理与高地下水位相关的土壤盐渍化风险。我们评估了短期轮作柳树（SRW；Salix dasyclados Wimm.）种植园对与浅 GWT 波动相关的土壤和地下水盐度的影响，并在田间试验中与相邻的一年生作物 (AC) 和牧场 (PA) 进行了比较。地下水盐度 (EC _gw ) 以及 GWT 的深度和土壤盐度（EC_土壤）在 0-60 厘米深度）沿两个草原坑洼地区 (PPR) 湿地地点（A 和 B）的每种土地利用实践中的横断面进行测量。 不同土地用途的EC _gw变化显着 ( p < 0.05)；但是，在两个站点中不一致。与 EC _gw、EC_土壤和总溶解盐 (TDS)的正相关表明两个地点的盐度和盐分随着 GWT 深度的增加而升高。EC_土壤 在土地利用实践中存在显着差异 ( p < 0.05)；然而，两个地点的土地利用模式并不一致。在整个实验过程中，站点 B 始终表现出较高的 EC_土壤（两倍）比站点 A。我们观察到 EC_土壤的倾斜度随着两个深度（即 0-30 和 30-60 厘米）的 SRW 生物量的增加而减小，反之亦然。这项研究完善了我们对 SRW 人工林相关潜在水文变化及其对盐度影响的认识，这为 PPR 中退化的边缘河岸湿地土壤管理提供了关键背景。