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Long-term Effects of Thinning on Stand Basal Area Increment of Cunninghamia lanceolata

  • Discussed the thinned cumulative stand basal area dynamics after every thinning happened during the past 26 years. The results indicate that (1) As long as site index with the different plots is the same, the cumulative basal area will finally converge to one; (2) The diameter classes increases with thinning processes and the residual individual trees have larger diameter class in common; (3) The plantation with 16 site index should be planted high density and thinned with high frequency so that the different size logs can be obtained and the cumulative stand basal area growth can be promoted. As for 14 site index, we should plant spare plantation so that the small- and medium-sized logs can be produced through spare stand density; (4) The thinning have little effect on the cumulative stand basal area growth with 14 site index; (5) It is possible to obtain the larger diameter classes log which plants high site quality and low stand initial density.
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  • [1] 中国树木志编委会.中国主要树种造林技术[M].北京: 农业出版社, 1976

    [2] 雷加富.中国森林资源[M].北京: 中国林业出版社, 2005

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    [4] 盛炜彤, 惠刚盈, 张守攻, 等. 杉木人工林优化栽培模式[M].北京: 中国科学技术出版社, 2004

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    Medhurst J L, Beadle C L, Neilsen W A. Early-age and later-age thinning affects growth, dominance, and intraspecific competition in Eucalyptus nitens plantations [J]. Canadian Journal of Forest Research , 2001, 31(2): 187-197
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    Zhang J, Oliver W W, Powers R F. Long-term effects of thinning and fertilization on growth of red fir in northern California [J]. Canadian Journal of Forest Research, 2005, 35: 1285-1293
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    [9] 尹泰龙.林分密度控制图[M].北京: 中国林业出版社, 1984

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    [11] 童书振,张建国,罗红艳,等. 杉木林密度间伐试验[J].林业科学, 2000, 36(专刊): 96-89

    [12] 孙洪刚,张建国,段爱国,等. 5种Logistic模型在模拟杉木人工林胸高断面积分布中的应用[J]. 林业科学研究, 2007, 20(5): 622-629

    [13] 孙洪刚.杉木人工林断面积生长规律及动态模拟 .北京: 中国林业科学研究院, 2008

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    [15] 张建国,段爱国.理论生长方程与直径结构模型的研究[M].北京: 科学出版社, 2004

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Long-term Effects of Thinning on Stand Basal Area Increment of Cunninghamia lanceolata

  • 1. Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Fuyang 311400, Zhejiang, China
  • 2. Research Institute of Forestry, Chinese Academy of Forestry, Beijing 100091, China

Abstract: Discussed the thinned cumulative stand basal area dynamics after every thinning happened during the past 26 years. The results indicate that (1) As long as site index with the different plots is the same, the cumulative basal area will finally converge to one; (2) The diameter classes increases with thinning processes and the residual individual trees have larger diameter class in common; (3) The plantation with 16 site index should be planted high density and thinned with high frequency so that the different size logs can be obtained and the cumulative stand basal area growth can be promoted. As for 14 site index, we should plant spare plantation so that the small- and medium-sized logs can be produced through spare stand density; (4) The thinning have little effect on the cumulative stand basal area growth with 14 site index; (5) It is possible to obtain the larger diameter classes log which plants high site quality and low stand initial density.

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