Abstract:

In order to investigate the species diversity of 4 different planted forests in the suburbs of Changsha, the author selected the richness, diversity, dominance index to analyze and study the species diversity of the region. The results showed that Margalef abundance index of shrub layer was: Liquidambar formosana>Cinnamomum camphora>Cunninghamia lanceolata>Pinus elliottii. The diversity index in Cunninghamia lanceolata was minimum. The tend of evenness index was Pinus elliottii>Cinnamomum camphora>Liquidambar formosana>Cunninghamia lanceolata. The richness and diversity index of herb layer was Cinnamomum camphora>Cunninghamia lanceolata>Liquidambar formosana>Pinus elliottii. The evenness index in Pinus elliottii was minimum, which was opposite to ecological dominance. Richness and diversity index in shrub layer were higher than the herb layer. The evenness index was herb layer>shrub layer, except Pinus elliottii. Ecological dominance in Cunninghamia lanceolata was shrub layer>herb layer, which was opposite to the other forest.