[目的] 以草原矿产资源开发形成的排土场为研究对象，研究不同调亏灌溉处理排土场边坡人工栽培牧草生长状况、土壤含水率和坡面侵蚀的变化，为完善草原矿区废弃地植被恢复灌溉技术提供科学依据。 [方法] 设置5种调亏灌溉处理，以充分灌溉为对照(CK)，通过对比试验分析不同调亏灌溉处理对边坡人工牧草群落总盖度、地上生物量、坡面径流及水分利用效率的影响，采用秩和比法确定废弃地边坡人工草地最佳补水方案。 [结果] 草原矿区废弃地边坡人工草地建设过程中，随着亏水程度的加重，植物生长发育受到限制，当土壤含水率在土壤田间持水率的45%以下时，植物地上生物量和群落盖度下降明显(p＜0.05)；植物生长初期，坡面产沙量和径流量随着灌水量的增加显著增加(p＜0.05)，快速生长期和生长旺盛期各处理之间的产沙量、径流量变化不明显；对比各灌溉处理水平，轻度、中度调亏灌溉(土壤水分含量分别达到土壤田间持水率的55%，45%时)水分利用效率较高。 [结论] 人工草地建植效果、蓄水保土能力、灌溉水利用效率综合评价结果表明，轻度调亏灌溉(土壤水分含量达到土壤田间持水率的55%)在人工草地建植效果与水分利用效率方面结合较好，水土流失防控效果明显，可作为草原区矿山废弃地建设人工草地主要节水灌溉模式优先选择。
[Objective] The changes in plant growth, soil moisture content, and slope erosion on the slope of a dump field formed by the development of grassland mineral resources under different regulated deficit irrigation treatments were determined in order to provide a scientific basis for the implementation of restoration irrigation technology. [Methods] Five regulated deficit irrigation treatments were set up, and full irrigation was used as the control. The rank sum ratio method was used to determine the best water replenishment scheme for artificial grassland on abandoned land slopes. [Results] As water deficit increased, the growth and development of plants of an artificial grassland on abandoned slopes of a grassland mining area were restricted. The above-ground biomass and community coverage of plants decreased significantly (p＜0.05). In the early stage of plant growth, the sediment yield and runoff on the slope increased significantly with increasing irrigation amount (p＜0.05). There were no obvious changes in sediment yield and flow rate between treatments. Compared with the regulated deficit irrigation treatments, the water use efficiency of mild and moderate regulated deficit irrigation (when the soil moisture content reached 55% and 45%, respectively, of the soil field water holding capacity) was relatively high. [Conclusion] A comprehensive evaluation of the effects of artificial grassland construction on water storage, soil conservation capacity, and irrigation water use efficiency showed that mild deficit-regulated irrigation (soil moisture content reached 55% of soil field water holding capacity) produced similar effects on water use efficiency and artificial grassland construction benefits. The combination was good, and the effect on soil erosion prevention and control was obvious. This level of regulated deficit irrigation could be used as the preferred choice for constructing artificial grasslands in the mine wasteland of the study area.