Journal of Forest Research

, Volume 2, Issue 4, pp 221–226 | Cite as

Self-thinning in prince Rupprecht's larch (Larix principis-rupprechtii Mayr) stands

  • Li Xue
  • Akio Hagihara
  • Yoshiya Tadaki
  • Xangkuan Du
Original Articles

Abstract

Prince Rupprecht's larch (Larix principis-rupprechtii Mayr) stands growing at three different densities were investigated to determine characteristics of self-thinning. Tree density decreased with increasing stand age, and the higher density stand had higher mortality than the lower one. Mean stem volume increased with increasing stand age, and the higher density stand had higher relative growth rate of mean stem volume than the lower one. Mean stem volume (ν) increased with decreasing tree density (ρ), resulting in self-thinning line being expressed as ln ν=lnK-α ln ρ, whereK and α are coefficients. The slope of self-thinning line, —α, over the whole study period for all sites was similar with a mean value of —2.13. The ν-ρ trajectories before reaching the self-thinning slope of—3/2 could be described by Tadaki's model. The phase self-thinning line tended to decrease toward a slope of—3/2 with increasing stand age, which trends agreed with those of the published data of aPinus strobus stand andP. densiflora stands.

Key words

density-dependent mortality mean stem volume-tree density trajectory phase self-thinning line Prince Rupprecht's larch self-thinning law 

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Copyright information

© Japanese Forestry Society 1997

Authors and Affiliations

  • Li Xue
    • 1
  • Akio Hagihara
    • 1
  • Yoshiya Tadaki
    • 1
  • Xangkuan Du
    • 2
  1. 1.Forest Ecophysiology Laboratory, Forest Sciences Division, School of Agricultural SciencesNagoya UniversityNagoyaJapan
  2. 2.Forest Research Institute of Shanxi ProvinceTaiyuanP. R. China

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