中国水土保持科学2026，Vol.24Issue(4)：161-171,11.DOI:10.16843/j.sswc.2025212
引黄与地下水灌溉对乌兰布和农田防护林土壤养分与盐分的影响
Effects of Yellow River diversion and groundwater irrigation on soil nutrients and salt content of farmland shelterbelts in Ulan Buh Desert area
摘要
Abstract
[Objective]In arid and semi-arid regions,the ecological functions of farmland shelterbelts are critically dependent on soil quality,which is profoundly shaped by irrigation water sources.In the Ulan Buh Desert area,characterized by high evapotranspiration and scarce precipitation,a trade-off is observed between using mineral-laden Yellow River water and using saline groundwater for irrigation.However,the long-term effects of these two water sources on the coupled dynamics of soil nutrients and salt content in shelterbelt systems remain unclear.This study aims to elucidate the regulatory mechanisms of different irrigation water sources on soil nutrient-salt content interactions,thereby providing guidance for sustainable irrigation management.[Methods]A typical farmland shelterbelt system in Dengkou county,Inner Mongolia,was selected for this study.Two irrigation treatments were compared:long-term Yellow River water irrigation and long-term groundwater irrigation,each with six replicate plots.Soil samples were collected in July(two weeks after the final irrigation)from five soil depth layers(0-100 cm,at 20 cm intervals).Eight soil nutrient indicators(e.g.,organic matter,total nitrogen,ammonium nitrogen,nitrate nitrogen,available phosphorus,and available potassium)and nine salt ions(e.g.,Na+,Cl-,and SO42-)were measured.Data were analyzed using one-way ANOVA and correlation analysis.[Results]Compared with groundwater irrigation,Yellow River water irrigation significantly increased the mean contents of soil organic matter(6.85 vs.3.41 g/kg),total nitrogen(0.45 vs.0.27 g/kg),ammonium nitrogen(10.39 vs.8.78 mg/kg),and available potassium(282.11 vs.234.97 mg/kg)in the 0-100 cm soil layer.Higher spatial stability of these nutrients(coefficient of variation,CV:4.07%-21.64%)was also observed under Yellow River irrigation.However,under Yellow River irrigation,nitrate nitrogen showed significant leaching in the 40-60 cm layer(P<0.05).Conversely,groundwater irrigation led to surface accumulation of nitrate nitrogen(4.27 mg/kg)and available phosphorus(13.24 mg/kg).Critically,the mean total salt content under groundwater irrigation was three times that under Yellow River irrigation.In the 80-100 cm layer,Cl-and Na+concentrations under groundwater irrigation were 23.8 times and 8.23 times higher,respectively,than those under Yellow River irrigation.Correlation analysis revealed that,under Yellow River irrigation,organic matter was negatively correlated with salt ions(e.g.,Na+,Cl-),whereas a synergistic accumulation of nutrients and salts was observed under groundwater irrigation.[Conclusions]Long-term irrigation with Yellow River water is more effective in maintaining surface soil nutrients and preventing salt accumulation,thereby resulting in a lower risk of soil salinization.Although groundwater irrigation provides short-term benefits for certain nutrients,it induces a high risk of severe salt accumulation in deep soil layers,particularly Cl-and Na+.Therefore,groundwater irrigation should be complemented with drainage systems or mixed with Yellow River water to balance nutrient supply and salt hazard control.The objectives of this study are achieved,as the differential mechanisms of the two water sources on soil nutrient and salt dynamics are clearly identified.关键词
农田防护林/灌溉水源/土壤养分/盐分Key words
farmland shelterbelt/irrigation water sources/soil nutrients/salt content分类
农业科技引用本文复制引用
王英姿,黄雅茹,韩春霞,韩固,孙多丽,董雪..引黄与地下水灌溉对乌兰布和农田防护林土壤养分与盐分的影响[J].中国水土保持科学,2026,24(4):161-171,11.基金项目
国家自然科学基金"沙冬青功能性状与其功能多样性对环境因子的响应"(32101595) （32101595）
内蒙古自治区自然科学基金项目"黄河流域乌兰布和沙漠段植物群落构建研究"(2025MS03127) （2025MS03127）
中央引导地方科技发展资金项目"乌兰布和沙漠东缘固沙植被水碳功能性状对降水脉动响应研究"(2024ZY0014) National Natural Science Foundation of China Project"Response of Functional Traits and Functional Diversity of Ammopiptanthus mongolicus to Environmental Factors"(32101595).Natural Science Foundation of Inner Mongolia Autonomous Region Project"Study on Plant Community Construction in Ulan Buh Desert section of the Yellow River"(2025MS03127).Central Government Guided Local Science and Technology Development Fund Project"Response of Water and Carbon Functional Traits of Sand-Fixing Vegetation to Precipitation Pulses on the Eastern Edge of the Ulan Buh Desert"(2024ZY0014) （2024ZY0014）
