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PENG Jian-song, CHAI Yong, MENG Guang-tao, FANG Xiang-jing, LI Gui-xiang, HE Li-ping. Gap characteristics in the natural forests of Pinus yunnanensis alone the Jinshajiang Basin in Yunnan Province[J]. Journal of Zhejiang A&F University, 2005, 22(1): 50-55.
Citation: PENG Jian-song, CHAI Yong, MENG Guang-tao, FANG Xiang-jing, LI Gui-xiang, HE Li-ping. Gap characteristics in the natural forests of Pinus yunnanensis alone the Jinshajiang Basin in Yunnan Province[J]. Journal of Zhejiang A&F University, 2005, 22(1): 50-55.

Gap characteristics in the natural forests of Pinus yunnanensis alone the Jinshajiang Basin in Yunnan Province

Funds:

十五 国家科技攻关重点项目(2001BA510B0603); 九五 国家科技攻关重点项目(2000-k01-04-05)

  • Received Date: 2004-04-19
  • Rev Recd Date: 2004-09-21
  • Publish Date: 2005-02-20
通讯作者: 陈斌, bchen63@163.com
  • 1. 

    沈阳化工大学材料科学与工程学院 沈阳 110142

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Gap characteristics in the natural forests of Pinus yunnanensis alone the Jinshajiang Basin in Yunnan Province

Funds:

十五 国家科技攻关重点项目(2001BA510B0603); 九五 国家科技攻关重点项目(2000-k01-04-05)

Abstract: The gap characteristics and natural disturbance regimes of 45 gaps in the natural forests of Pinus yunnanensis were studied , in Baimahe Forest Farm and Xiangshuihe Forest Farm of Yongren County , in Yunnan Province .The results showed that these gaps were elliptic in horizontal form .The average area of expand gap (EG) and canopy gap (CG)were 469.42 m2 and 181.90 m2 respectively , the area percentage of both in the forest landscape were 28.23 % and 10.49 % respectively , and annual natural disturbance frequency of both were 0.672 1 % and 0.247 9 % respectively .So the return interval of the gap was gotten , about 400.48 a .These gaps mostly formed 40 a ago , and made by 1 to 3 gap makers (mainly by one).The diameter of gapmakers was mainly from 30 to 50 cm, and the height of which was mainly from 20 to 30 m .The manners of gap formation in the percentage order from high to low were :uprooting (33.7 %), breakage at trunk base (27.9 %), breakage on trunk (18.6 %), standing die (17.4 %), and breakage on branch (2.4 %).The combination of the different manners can be found often .Finally , based on the theory of gap dynamics , some suggestions on the natural forest of Pinus yunnanensis management were provided .[ Ch , 5 tab .10 ref .]

PENG Jian-song, CHAI Yong, MENG Guang-tao, FANG Xiang-jing, LI Gui-xiang, HE Li-ping. Gap characteristics in the natural forests of Pinus yunnanensis alone the Jinshajiang Basin in Yunnan Province[J]. Journal of Zhejiang A&F University, 2005, 22(1): 50-55.
Citation: PENG Jian-song, CHAI Yong, MENG Guang-tao, FANG Xiang-jing, LI Gui-xiang, HE Li-ping. Gap characteristics in the natural forests of Pinus yunnanensis alone the Jinshajiang Basin in Yunnan Province[J]. Journal of Zhejiang A&F University, 2005, 22(1): 50-55.

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