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Structure patterns of dominant populations in the secondary conifer and broadleaf mixed forest in Changtan Nature Reserve were studied with grid method, the results showed that: (1)There were 6081 trees in the 6600 m2 fileds, which in a total of 135 speices, and the main speices included 12 species, such as Cunninghamia lanceolata, Pinus massoniana, Schima superba, Aleurites montana, Sapium discolor, Phyllostachys heterocycla, Cinnamomum porrectum, Castanopsis fissa,Bambusa textiles, Liquidambar formosana,Diospyros morrisiana, Lithocarpus glabra, etc. (2)The age structures of Schima superba, Liquidambar formosana, Aleurites montana, Cinnamomum porrectum, Castanopsis fissa, Diospyros morrisiana and Lithocarpus glabra were L increasing type, and Cunninghamia lanceolata, Pinus massonianaⅠ、Ⅱ、Ⅲ
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