西北地区地下水对植被生存演替的作用

SIGNIFICANCE OF GROUNDWATER FOR EXISTENCE AND SUCCESSION OF VEGETATION IN NORTHWEST CHINA

在介绍西北地区的气候及水资源的基本特征的基础上 ,分析了植被的分带、生存适应性及演替与地下水的关系 ,并阐述了地下水开采对植被的影响。结果表明 ,植被的分布、生存和演替主要受控于水盐条件。人为活动下 ,这种条件的改变势必影响着植被的生存。最后 ,就如何处理合理用水和植被生存的关系 ,提出了一些建议 ,这对于西北大开发的生态建设有一定的借鉴意义。

Based on an introduction to the characteristics of climate and water resource in Northwest China, the authors analyzed the relationships among vegetable distribution, adaptability of existence and succession as well as groundwater, and expounded the effect on vegetation under the condition of exploitation of groundwater. The results show that the distribution, existence and succession of vegetation are controlled by water-salt condition and that under human activities, the change of conditions will influence the existence of vegetation. Finally, the authors set forth some suggestions on the relationship between the reasonable use of water and the existence of vegetation. These will have some directive significance for the eco-construction of Northwestern development.