秦岭林区锐齿栎林水文效应的研究

采用水量平衡定量研究方法，对秦岭林区不同密度锐齿栎林的水文效应进行了系统研究．结果表明，锐齿栎林林冠截持能力占降水的１１．９％～１５．５％，凋落物截持量为４．２～５．８ｍｍ，林地土壤含蓄量为５８．０～６８．８ｍｍ．壤中流是秦岭林区最主要的产流形式，也是评价锐齿栎林水文效应最直观的指标．林冠截持量、凋落物持水量和林地土壤含蓄量随着林分密度和郁闭度的增加而增加，林地壤中流量随林分密度和郁闭度的增加而呈下降趋势．这说明密度大郁闭度高的林分在水源涵养方面有非常显著和独特的作用．

Hydrological Effect of Quercus aliena var.acuteserrata Stands in Forest Region of the Qinling Mountains

Using the method of hydrologic balance, the hydrological effect of Quercus aliena var. acuteserrata stands with different density at the Qinling Mountains has been studied systematicaly. The results indicate that the crown interception ranged from 11.9% to 15.5% of the total rainfall, the litter absorption was about 4.2 to 5.8 mm, and waterholding capacity of soil layer was from 58.0 to 68.8 mm. The interflow is an important form of the discharge in forest region of the Qinling Mountains and a significant parameter to assessment on the hydrological effect. The crown interception, litter absorption and waterholding capacity of soil layer increased but interflow of soil layer decreased with the increase of stand density and crow density. It is suggested that forest with high stand density has a special and gigantic effect on holding water resources.