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通过连续８ａ对毛白杨幼林的控水灌溉试验，对灌溉的经济效益及节水效益进行了研究，并对沙地毛白杨幼林的节水灌溉技术进行了分析。结果表明：灌溉不仅促进林木在短期内速生，而且具有长期持续的增产效益；春夏干旱期内灌溉具有很高的经济效益，且随时间的增加不断增长；灌溉的土壤水分阈值和灌溉时期是实现节水灌溉的两项重要指标。在生长季节，特别是林木生长的关键时期，使土壤水分维持在田间持水量的５０％～６０％以上，就可获得较高的经济效益及灌溉水的利用效率。
Through the experiment of controlled irrigation of 8 years of Populus tomentosa Young Forests, the economic benefits and water saving benefits of irrigation were studied, and the water saving irrigation techniques of Young Poplar Young Poplar were analyzed. The results showed that irrigation not only promoted the rapid growth of forest trees in a short term, but also had long-term sustainable yield increase. Irrigation in spring and summer drought period had high economic benefits and increased with time. The threshold of irrigation and the irrigation duration Achieve two key indicators of water-saving irrigation. In the growing season, especially in the critical period of tree growth, the soil moisture is maintained at more than 50% to 60% of the field capacity, so as to obtain higher economic efficiency and irrigation water utilization efficiency.