Estimating loblolly pine size-density trajectories across a range of planting densities

This article is part of a larger document. View the larger document here.

  • Authors: VanderSchaaf, Curtis L.; Burkhart, Harold E.
  • Publication Year: 2013
  • Publication Series: Paper (invited, offered, keynote)
  • Source: In: Guldin, James M., ed. 2013. Proceedings of the 15th biennial southern silvicultural research conference. e-Gen. Tech. Rep. SRS-GTR-175. Asheville, NC: U.S. Department of Agriculture, Forest Service, Southern Research Station. 207-212.

Abstract

Size-density trajectories on the logarithmic (ln) scale are generally thought to consist of two major stages. The first is often referred to as the density-independent mortality stage where the probability of mortality is independent of stand density; in the second, often referred to as the density-dependent mortality or self-thinning stage, the probability of mortality is related to stand density. Within the self-thinning stage, segments of a size-density trajectory consisting of a nonlinear approach to a linear portion, a linear portion (maximum size-density relationship dynamic thinning line), and a divergence from the linear portion are generally assumed. Estimates of the ln of quadratic mean diameter and ln of trees per acre where the two stages of stand development and the three phases of self-thinning begin and end were obtained from segmented regression analyses and used as response variables predicted as a function of planting density. Predicted values allow for size-density trajectories to be estimated for any planting density.

  • Citation: VanderSchaaf, Curtis L.; Burkhart, Harold E. 2013. Estimating loblolly pine size-density trajectories across a range of planting densities. In: Guldin, James M., ed. 2013. Proceedings of the 15th biennial southern silvicultural research conference. e-Gen. Tech. Rep. SRS-GTR-175. Asheville, NC: U.S. Department of Agriculture, Forest Service, Southern Research Station. 207-212.
  • Posted Date: June 4, 2013
  • Modified Date: June 4, 2013
  • Print Publications Are No Longer Available

    In an ongoing effort to be fiscally responsible, the Southern Research Station (SRS) will no longer produce and distribute hard copies of our publications. Many SRS publications are available at cost via the Government Printing Office (GPO). Electronic versions of publications may be downloaded, printed, and distributed.

    Publication Notes

    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
    • Our online publications are scanned and captured using Adobe Acrobat. During the capture process some typographical errors may occur. Please contact the SRS webmaster if you notice any errors which make this publication unusable.
    • To view this article, download the latest version of Adobe Acrobat Reader.