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FOREST RESOURCES WANAGEMENT ›› 2019›› Issue (4): 59-68.doi: 10.13466/j.cnki.lyzygl.2019.04.009

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Effects of Thinning on the Growth of Pinuse Elliottii Plantation and the Diversity of Its Undergrowth Vegetation

DONG Kaili1(), ZHANG Guoxiang2, WANG Ruihui1(), LIU Kaili1, ZHAO Suya1, GONG Yingyun1   

  1. 1. Central South University of Forestry & Technology,Changsha,Hunan 410004,China
    2. Huarong County Forestry Bureau,Yueyang,Hunan 414200,China
  • Received:2019-06-14 Revised:2019-07-05 Online:2019-08-28 Published:2020-10-20
  • Contact: WANG Ruihui E-mail:1984158114@qq.com;wang626389@163.com

Abstract:

The study was based on 8a pinus elliottii plantation in Jing'an County,Jiangxi Province,sorting it into four thinning intensities,0%(C),15%(L),35%(M),55%(H).Observing the effects of tending and thinning on tree growth and undergrowth vegetation,the results show:with increasing thinning intensity,the distribution of diameter moves right compared with C.The diameter of L and M obey normal distribution but C and H don’t.Clearly,thinning has promoting effects on rise in both diameter and volume with a major difference in annual average growth of diameter between C and H,M,and the average annual growth of volume of C was significantly different from H,but the difference in average annual growth of height is slight.On the whole,thinning makes the number of undergrowth of plantations increase and improve the vegetation layer index of Simpson,Shannon-Wiener and Pielou,the effect which is relatively remarkable in the first two years after experiment,afterwards is weakened.The research results can provide technical support for the management of Pinus elliottii plantation.

Key words: Pinus elliottii, thinning intensities, stand growth, undergrowth vegetation

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