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FOREST RESOURCES WANAGEMENT ›› 2021›› Issue (2): 83-91.doi: 10.13466/j.cnki.lyzygl.2021.02.012

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Effects of the Cutting Intensity on Stand Growth and Structure for Querus mongolica Secondary Forests

DONG Lili1(), LIU Hongmin1(), WANG Chengcheng1, YING Fangsheng2, GAO Yingxu1, DING Lei3, LU Aijun1   

  1. 1. Liaoning Academy of Forestry,Shenyang 110032,China
    2. Liaoning Province Public Resources Trading Center,Shenyang 110001,China
    3. Liaoning Provincial Institute of Forest Management,Dandong,Liaoning 118002,China
  • Received:2020-12-03 Revised:2021-03-08 Online:2021-04-28 Published:2021-06-03
  • Contact: LIU Hongmin E-mail:donglili_1982@126.com;hm@163.com

Abstract:

It is of great significance to study the changes of stand growth and stand structure under different cutting intensities for sustainable forest management.In this study,a natural secondary forest of 52 years old Quercus mongolica in mountainous area of eastern Liaoning was studied,and three fixed sample plots of high intensity (40%),medium intensity (29%)and control (0%)were set,respectively.Based on the long-term continuous observation data of 7 years in the after-cutting period,the effects of different cutting intensities on growth and stand structure were compared and analyzed.The results showed as follows:(1)cutting promoted the increase of mean DBH and individual volume.After 7 years of cutting,the average DBH of high intensity and medium intensity stands increased by 6.9cm and 5.2cm,respectively,and the individual volume was 1.8 times and 1.5 times than that of the control,respectively.(2)The cutting reduced the stand volume and increased the stand volume growth rate.The average annual growth rate of the stand volume during the 7-year period was medium intensity >high intensity >control.(3)The cutting reduces average value of mingling degree of stands,which makes the whole stand tend to be pure forest.In the spatial distribution pattern of stands,medium intensity increased the proportion of randomly distributed trees,and the whole stand distribution pattern showed randomly distribution;On the contrary,high intensity reduced the proportion of randomly distributed trees,and the whole stand distribution pattern showed aggregated distribution.Cutting promoted the growth of natural secondary forest of Quercus mongolica,optimized the stand structure,and medium intensity should be adopted.

Key words: stand growth, diameter class structure, spatial structure, cutting intensity

CLC Number: