The Influence of Hardwood Interspecific Competition on Stand Structure and Dynamics for Loblolly Pine Plantations

  • Lee, Young-Jin (Department of Forestry, Kyungpook National University) ;
  • Cho, Hyun-Je (Department of Forest Resources & Biotechnology, Daegu Polytechnique Collage) ;
  • Kim, Dong-Geun (Department of Forest Resources, Sangju National University) ;
  • Bae, Kwan-Ho (Department of Forest Resources, Sangju National University) ;
  • Joo, Sung-Hyun (Department of Forestry, Kyungpook National University) ;
  • Hong, Sung-Cheon (Department of Forestry, Kyungpook National University)
  • Published : 2001.08.01

Abstract

The purpose of this study is to investigate the effects of hardwood competitions in stand structure and dynamics by applying prediction models for unthinned loblolly pine (Pinus taeda L.) plantations. A parameter recovery procedure for the Weibull distribution function based on four percentile equations was applied to develop diameter distribution prediction models. Four percentiles of the cumulative diameter distribution prediction equations were predicted as a function of quadratic mean diameter plus competin hardwood trees perhectare varibales. According to the results of this study. it was found that as the amount of competing hardwood trees increased, diameter distributions in terms of stand structure dynamics tended to be more skewed to the right. Therefore, the influence of non-planted hardwood trees interspecific competitoin on planted loblolly pines showed negative effects on the stand structure and dynamics.

Keywords

References

  1. Forest Measurement. 4th ed. Avery, T.E.;H.E. Burkhart
  2. For. Sci. v.19 no.2 Quantifying diameter distributions with the Weibull function Bailey, R.L.;T.R. Dell
  3. South. J. Appl. For. v.16 no.3 Predicting diameter distributions for site-prepared loblolly and slash pine plantations Brooks, J.R.;B.E. Borders;R.L. Bailey
  4. Publication No. FWS-3-84. VPI&SU A model for assessing hardwood competition effects on yields of loblolly pine plantations Burkhart, H.E.;P.T. Sprinz
  5. Timber Management: A Quantitative Approach Clutter, J.L.;J.C. Fortson;L.V. Pienaar;G.H. Brister;R.L. Bailey
  6. Ph.D. Thesis Dynamics of stand structure in fertilized slash pine plantations Da Silva, J.A.A.
  7. South. J. Appl. For. v.20 no.4 Removal of competing vegetation from established loblolly pine plantations increases growth on Piedmont and Upper Coastal plain sites Fortson, J.C.;B.D. Barry;L. Shackelford
  8. Can. J. For. Res. v.23 Loblolly pine and mixed hardwood stand dynamics for 27 years following chemical, mechanical, and manual site preparation Glover, G.R.;B.R. Zutter
  9. South. J. Appl. For. v.14 Eleventh-year results of fertilization, herbaceous, and woody control in a loblolly pine plantation Haywood, J.D.;A.E. Tiarks
  10. For. Ecol. Manage. v.55 Incorporating the effects of interspecific competition in diameter distribution models for young loblolly pine plantations Knowe, S.A.
  11. Jour. Korean For. Soc. v.88 no.3 Estimation of site index curves for loblolly pine and slash pine plantations Lee, Y.J.;S.C. Hong
  12. Ph.D. Thesis Yield prediction models for unthinned loblolly and slash pine plantations in East Texas Lee, Y.J.
  13. Simulating the effect of hardwood encroachments on loblolly pine plantations. In Proceedings of the Fourth Biennial Southern Silvicultural Research Conference Smith, W.D.;W.L. Hafley