Response is investigated for seedlings of Salix psammophila,a dominant shrub in Ordas plateau,to the global precipitation change by artificially controlling water supply at four levels.

• 选择鄂尔多斯高原优势灌木沙柳为研究对象，人为控制4种供水量水平来探讨沙柳幼苗对模拟降水量变化的响应。