绥阳火秋坝自然保护区种子植物区系研究

Study on Seed Plant Flora in Huoqiuba Nature Reserve of Suiyang County,Guizhou Province

绥阳火秋坝自然保护区种子植物有125科334属489种。其中裸子植物5科6属8种,被子植物120科328属481种。科-种数量和属-种数量关系模式随种数量增大而科数量和属数量减少,单种科和单种属的比例分别为35. 20%和71. 56%。植物科区系为温带-热带分布型,属区系呈热带-温带分布型,中国特有科和特有属的数量较少,这和其所处纬度及海拔较高有关。植物区系属华中植物省,是中国-日本森林植物区系的核心部分,在同纬度的小型自然保护区中具有一定代表性。钙生性植物区系占一定比例,为岩溶槽谷区石漠化综合治理的植被恢复途径提供了树种选择依据。

There were 489 species of seed plants belonging to 334 genera and 125 families,in which 8 species of gymnosperms belonging to 6 genera and 5 families and 481 species of angiosperms belonging to 328 genera and 120 families,in Huoqiuba nature reserve of Suiyang county,Guizhou province.Model of relationship of family-species and genus-species was that the number of families and genera decreased with the number of species increased.The proportions of single-specie families and single-specie genera were 35.20% and 71.56% respectively.Plant family-flora was temperate-tropical distribution model and genus-flora was tropical-temperate distribution model.The numbers of families and genera of Chinese endemic were less,which had to do with its latitude and altitude.The flora belongs to the central China plant province,which was the core part of the Sino-Japan forest plant flora,and was representative of the small and medium-sized nature reserves at the same latitude.A certain proportion of calcareous plant flora provides a basis for tree species selection for the desertification comprehensive management in karst trough valley area.