| Chinese wine special water conservation area in the upper reaches of Chishui river is one of the keyareas of water conservation forest project. Based on the survey and the data from 27 plots, characteristics of forestplant diversity in the upper reaches of Chishui River are discussed. Four plant diversity indexes are introduced tocompare the species diversity of tree layer, shrub layer and herb layer. The results show that community heightincrease gradually, the structure tend to be complex, species abundance and diversity of shrub layer is higher thanthose of tree layer and herb layer at every stage with the succession of grass community stage, bushwood communitystage, shrub community stage , high-forest community stage and sub-climax community stage. Sortings ofShannon-Wiener diversity index, Margalef index and Pielou index is consistent with that of species numbers, sorting ofSimpson index are contrary to that of species number. High -forest community has the most complex speciescomposition, it is suitable to the grow of shrub and herbs, and provide the basis for the structure adjustment of forestcommunity. On the whole, plant diversity indexes are not high in this area, so forest management and humandisturbance measures should be adopted to improve the species diversity of plant communities, recover the function ofwater conservation and water and soil conservation. |
