安溪崩岗侵蚀区不同植被配置模式与恢复效果研究

Different Plant Allocation Models and Restoration Effects in Collapsing Gully Erosion Area of Anxi County

在对安溪崩岗侵蚀区全面调查的基础上,选择4种不同植被配置模式,分别从植被的种类、数量及生长状况等方面进行调查,同时利用乔木层径级、灌草层物种数、重要值、Simpson指数、Shannon-wiener指数、Pielou指数等方面对恢复效果进行评价。结果表明:马尾松+相思模式的径阶水平分布均匀,且树木长势良好。崩岗区灌草层植被种类单一,芒萁作为一种先锋物种在崩岗植被恢复过程中起着重要的作用。马尾松+相思和马尾松+桉树模式的物种丰富度指数、Simpson、Shannon-wiener、Pielou指数都较高,适合应用于崩岗侵蚀区的植被恢复。

On the basis of comprehensive survey to the collapsing gully erosion at Anxi County, four different plant allocation models in collapsing gully erosion areas were selected for the investigation from the aspects of the vegetation species, amount and growing status, etc. In addition, it is also assessed the vegetation restoration effects of different plant allocation models by using the diameter class of tree layer, the species of shrub layer, importance value, Simpson index, Shannon -wiener index, and Pielou index, etc. The result shows that the diameter class of the model masson pine ＋ acacia was distributed evenly with the well growth. Since the single species of the shrub and grass layers in collapsing erosion area, the Dicranopteris pedata as a pioneer plant plays the important role in the vegetation restoring at collapsing gully erosion area. The indexes of the specie richness, Simpson, Shannon - wiener and Pielou for the models of masson pine ＋ acacia and masson pine ＋ eucalyptus are higher than that of the others that are suitable for the application to the vegetation restoration in collapsing gully erosion areas.