Analysis of α- Diversity of Plant on Gujiao City

Plant species diversity survey and functional analysis were helpful for protecting plant diversity and human survival and providing scientific basis . In virtue of Releve method, 14 forest sample areas was selected to get its systematic vegetation survey was conducted among Gujiao city’s plant species of Shanxi Province. The forest communities had 5 types , the proportion of each type vegetation coverage area to total area in the research area was: grass aciculiailvae brushwood broad -leaved forest mixed broadleaf -conifer forest. The results indicated that no change occurred in the indices of the plant richness, evenness, and diversity ,and Margalef index fluctuated remarkably. With the weighted factor analysis α - diversity indeies , its level was general, species distribution was uneven, and species diversity index were different among communities, the rare specie accounts for smaller among the species, protection of plant species should be strengthened to ensure more species from becoming extinct.