Selection of the Excellent and Suitable Tree Species in the Hilly Regions of Middle Sichuan

Firstly,analytic hierarchy process (ahp) was used for 20 selected tree species to conduct model choice,and then tree species of higher scores were used in the tree planting comparison test. The results showed that (1) after being selected by AHP model, the suitable tree species for mid-sichuan hilly regions were German oak,Cork oak, Robinia pseudoacacia,Alnus cremastogyne,Camptotheca acuminata,Cedrela sinensis,Masson pine,Cinnamomum camphora and Cupressusfunebris;while the suitable shrub species were Coriaria sinica,Vitex trifolia and Pyracantha fortuneana. (2)Analyzing from survival rate,preserving rate and growth condition, Cinnamomum camphora, Alnus cremastogyne, Camptotheca acuminata, Robinia pseudoacacia and Cedrela sinensis could be replanted in Cupressus funebris forest site conditions. Cedrela sinensis should be replanted in better site conditions, while Robinia pseudoacacia should be replanted in worse site conditions. Cinnamomum camphora and Quercus variabilis should be replanted in Pinus massoniana forest. But replanting Cinnamomum camphora should be done in the stand with thicker soil layer and higher soil water content. Two years old seedlings of all nursery were suitable for replanting.