Preliminary Study On The Species And Stand Feature Of5Phoebe Trees In Zhejiang Province

Because of the traditional commodity wood has been unable to meet the needs of the market, precious timber tree species resources have become important strategic resources. Valuable timber tree of area and volume are very small, Phoebe tree species in Zhejiang Province as the main local valuable timber species, with fragmentary scattered in various types of natural forest in the majority, there are few stretches of distribution of natural and artificial forest.In view of this, this paper, taking Zhejiang province mainly local valuable timber tree species in Phoebe chekiangensis C.B.Shang、Phoebe sheareri (Hemsl.) Gamble, Phoebe bournei (Hemsl.) Yang、Machilus thunbergii Sieb. et Zucc Nan、Phoebe Zhennan S. Lee etF.N.Wei as the research object, Through the analysis of various species and geographic location, geomorphologic features geographical factors, comprehensive evaluation of Phoebe tree species survival environment; Simultaneous analysis of Phoebe chekiangensis C.B.Shang、Phoebe sheareri (Hemsl.) Gamble, Phoebe bournei (Hemsl.) Yang、Machilus thunbergii Sieb. et Zucc Nan、Phoebe Zhennan S. Lee et F.N. Wei, the kind of forest types, species composition and stand structure, as well as niche comparison of Phoebe tree species, community structure. In order for the scientific development of precious timber trees to provide the theory basis, to make Zhejiang province precious timber development modes of play guiding role.This paper uses EXCEL, SPSS software for statistical data analysis and spatial processing. Using Levins and Shannon-Wiener niche width formula for determination of5species of dominant population niche breadth values, and various species in the communities of dominant populations niche overlap to make calculation research. The results showed that:Phoebe tree species in Zhejiang have less pure forest distribution, and in the forest the important value on the low side Phoebe chekiangensis C.B.Shang and Cunninghamialanceolata (Lamb.) Hook、Schima superba Gardn et Champ ecological overlap value is high, compared with similar organisms, often consisting of mixed coniferous and broad-leaved forests and broad-leaved forest; Phoebe sheareri (Hemsl.) Gamble bournei occurs mainly in Diphasiastrum massoniana、Cunninghamialanceolata (Lamb.) Hook、Schima superba Gardn et Champ and other species of coniferous and broad-leaved mixed forest and deciduous forest, among them and Diphasiastrum massoniana massoniana between niche overlap value maximum; Phoebe bournei (Hemsl.) Yang appeared mainly in the Quercus fabri Hance、Cunninghamialanceolata (Lamb.) Hook、Schima superba Gardn et Champ、Diphasiastrum massoniana composed of broadleaf forest and conifer and broadleaf mixed forest, niche breadth value is small, and only with the Quercus fabri Hance niche overlap value is high, with other species between niche overlap value is low, that Phoebe bournei (Hemsl.) Yang and Quercus fabri Hance biological ecological most similar; Machilus thunbergii Sieb. et Zucc Nan occurred mainly in the needle and broad-leaved mixed forest, broad-leaved and coniferous forest, main tree species in community with Cunninghamialanceolata (Lamb.) Hook、 Schima superba Gardn et Champ、Cyclobalanopsis glauca (Thunberg) Oersted、Diphasiastrum massoniana massoniana etc, Machilus thunbergii Sieb. et Zucc Nan niche breadth value is larger, indicated that the environment has a strong ability to adapt, but with other species of Machilus thunbergii between niche overlap value is low; Phoebe Zhennan S. Lee et F.N. Wei occurred mainly in the broad-leaved forest, community of the main tree species are Cyclobalanopsis glauca (Thunberg) Oersted、Cunninghamialanceolata (Lamb.) Hook, Phoebe Zhennan S. Lee et F.N. Wei niche breadth value is not great, and other species niche overlaps between medium, only with the same genus MaChilus leptophylla Hand.-Mazz. has a larger niche overlap, description of hoebe Zhennan S. Lee et F.N. Wei sheareri habitat requirements more stringent.