【摘要】 对黄土高原沟壑区南缘的油松(Pinus tabulaeformis)、刺槐(Robinia psedudoacacia)人工林及荒坡的土壤水分动态的研究分析,认为林地土壤水分的垂直变化可以分为:土壤水分微弱利用层、土壤水分利用层、土壤水分调节层和土壤水分微弱调节层,荒坡土壤水分的垂直变化可分为:速变层、活跃层、次活跃层和相对稳定层。各立地土壤水分的季节变化可以分为:土壤水分积累期、土壤水分消退期、土壤水分恢复期、土壤水分稳定期和土壤水分消耗期。更多还原

【Abstract】 The dynamic of soil water in the artificial Pinus taulaeformis, Robinia pseudoacacia forest and the uncultivated lands in Chunhua county, Shaannxi province, were studied during April 1999 - March 2000. The results indicate that according to the vertical variation, the soil profile in the forest can be divided into four layers, i. e. weak absorbing layer, absorbing layer, regulating layer, and weak regulating layer, and in the uncultivated lands can be speedy changing layer, changeful layer, second-changeful layer and relative stability layer. According to the seasonal variation, the soil water condition in all site can be divided into the following five periods; accumulating period, decreasing period, restoring period, stable period and consuming period.更多还原