[目的]探讨干扰格局下额济纳天然胡杨林生态用水的机理.[方法]分别在额济纳绿洲七道桥、二道桥和戈壁滩设立试验点,根据不同地形、不同林型、不同林龄等设固定样地,用土钻取不同土层深度的土样,用CMP管状土壤水分仪测量不同深度土壤含水量,研究干扰格局下胡杨林生态用水机理.[结果]随着土壤深度的增加,土壤含水量逐渐增加,且不同深度内不同样地的变化趋势都不同；小径级胡杨林与大径级胡杨林土壤含水量相对较高,而中径级胡杨林的土壤含水量相对较低；苦豆子-胡杨林土壤含水量明显高于沙枣-胡杨林土壤含水量；土壤含水量随时间有逐年下降的趋势,全球气候变化影响下,胡杨的生存环境越来越严峻.[结论]该研究为今后额济纳绿洲胡杨林的恢复与保护以及该区域的可持续发展提供了科学依据.%[Objective] The mechanism of the ecological water - using of natural Populus euphratica under interference pattern in Ejina region was investigated. [Method] The pilot site of the experiment was set up at Qiedaoqiao, Erdaoqiao and Gobi Desert of Ejina Oasis. The soil sample at different soil depth was taken according to the different terrain, the different forest type, different forestry age, etc and the content of moisture in the soil sample was measured with the CMP tubular moisture analyzer at different depths of soil level for the study on its ecological water - using mechanism. [ Result] With the increment of soil depth, the content of water in soil gradually increased and the trend of the content of water in soil was not all different at different depth of soil. The content of moisture in soil planted with Populus euphraticawith large or small diameter of stem was relatively high. The content of moisture in soil planted with Sophora alopecuroides L - Populus euphratica was significantly higher than that of Elaeagnus angustifolia L - Populus euphratica. There was daily declining trend in the content of water with the time under global climate change, thus, it was more and more severe in the living environment of Populus angustifolia. [Conclusion] The scientific basis of the future research on the restoration, protection and sustainable development in the region of was provided.
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