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Citation:

Study on Logg ing Gaps Regenera tion in SecondaryBroad-leaved Forest in Changba iMounta in

  • Received Date: 2006-01-19
  • The regeneration trait of logging gap s in relation to sizes and ages in secondary broad2leaved forest whichwas p redominated by Tilia am urensis, Acerm ono and Quercus m ongolica in ChangbaiMountain was studied. The research result showed that there were 42. 8% ( canopy gap s area 2) , 23. 8% (20~40 m2 ) , 33. 4% (40~60 m2 )in the p roportion of gap size. 38. 1% of gap s shape were rotundity and 61. 9% were oval. 38. 5% of the oval gap s layin N2S direction, 46. 2% inW-E direction and 15. 3% in N2E to S-W direction. These gap swere usually formed after3~4 trees logged which weremainly composed of Tilia am urensis, Quercusm ongolica andM aackia am urensis. The regeneration layerwas dominated by the shrub in non-gap stands but arbor in the gap s. Moreover, the dominance wouldrise with increasing sizes and ages of gap s. The species diversity and densitywere obviouslymore in gap s than in non-gap stands. The synthesis diversity had a tendency to decline with increasing sizes and ages of gap s. The dominancespecieswere different in gap s of different sizes, but were mainly composed of intolerant species.
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Study on Logg ing Gaps Regenera tion in SecondaryBroad-leaved Forest in Changba iMounta in

  • 1. Research Institute of Forest Ecology, Environment and Protection, CAF, Key Laboratory of Forest Ecology and Environment,State Forestry Administration,Beijing 100091, China
  • 2. Academy of Forest Inventory and Planning,State Forestry Administration,Beijing 100714, China

Abstract: The regeneration trait of logging gap s in relation to sizes and ages in secondary broad2leaved forest whichwas p redominated by Tilia am urensis, Acerm ono and Quercus m ongolica in ChangbaiMountain was studied. The research result showed that there were 42. 8% ( canopy gap s area 2) , 23. 8% (20~40 m2 ) , 33. 4% (40~60 m2 )in the p roportion of gap size. 38. 1% of gap s shape were rotundity and 61. 9% were oval. 38. 5% of the oval gap s layin N2S direction, 46. 2% inW-E direction and 15. 3% in N2E to S-W direction. These gap swere usually formed after3~4 trees logged which weremainly composed of Tilia am urensis, Quercusm ongolica andM aackia am urensis. The regeneration layerwas dominated by the shrub in non-gap stands but arbor in the gap s. Moreover, the dominance wouldrise with increasing sizes and ages of gap s. The species diversity and densitywere obviouslymore in gap s than in non-gap stands. The synthesis diversity had a tendency to decline with increasing sizes and ages of gap s. The dominancespecieswere different in gap s of different sizes, but were mainly composed of intolerant species.

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