关键词: 兰州南北两山, 人工灌木林, 土壤水分

Abstract:

By position monitoring and comparative analyzing, we studied the variation and deficit degree of soil water of Caragana Korshinskii and Chinese Tamarisk in southern and northern mountains of Lanzhou city. The results showed that the deficit degree of soil water, the amount and intensity of water consumption, the ability to absorb water and the decrease speed of soil water of deep layer were Caragana Korshinskii>Chinese Tamarisk. So Chinese Tamarisk was more suited to be planted in southern and northtern mountains of Lanzhou. The seasonal variation of soil water was the common result of the rainfall and plant growth, the effect of rainfall and plant growth on soil water change of surface layer was notable, and that on substrate was unconspicuous. The seasonal change of soil water was similar to the seasonal variation of rainfall and plant growth, it could be divided into three periods: consuming period, supplying period and stable period.

Key words: southern and northern mountains of Lanzhou city, planted shrubs, soil water