关键词: 干旱区, 植物, 对数正态分布模型, 最适地下水位, 生态地下水位

Abstract: According to the ecological appropriate theory and the random sampling investigation date of several major plants in the Tarim basin, the logarithm normal distribution relation model between the growth of plants and the depth of groundwater was built. Based on the model, the fittest depth and suitable range of groundwater of these plants and their tolerance towards groundwater are gained. Compared with the measure and investigation data in other arid area, i.e. Ejin Banner in the lower Heihe basin, the result and the model built above are rational. Lastly, the conclusion and rational suggestion are proposed, which may be important for ecology construction and resumption and for sustainable development of arid areas.

Key words: arid area, vegetation, the logarithm normal distribution model, fittest depth of groundwater, ecological depth of groundwater