Research on the Diversity of Green Plant in Meishan City of Sichuan Province

[Objective] The urban ecological construction planning and biodiversity conservation were conducted in order to improve people's living environment and the development of national ecological garden city.[Method] By means of typical kind of investigation method,through the,the green space in park,ancillary green space and protected green space in Meishan City of Sichuan Province were studied and then the composition of species,the origin of plant,the richness of species,the Simpson index,the Shannon-Wiener index and the Pielou evenness index of the tree layer,shrub layer and herb layer in these three types of green space were analyzed.[Results] In 54 samples,there were 66 species,in 53 genus belonging to 36 families,among which,the native species from Sichuan Province reached to 1/3 and most of species were introduced at home and abroad.The order of the richness of species,the Simpson index,the Shannon-Wiener index in three types of green spaces was tree layer shrub layer herb layer and the Pielou evenness index,shrub layer tree layer herb layer.[Conclusion] The number and type of native plant species were less than normal,levels of plant diversity was low and community structure was relatively simple.