Maximum density line and model of self-thinning for plantation
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The method to determine the maximum density line of self-thinning is discussed and a self-thinning model is developed by using long term observed data of spacing study plots. According to traditional method, the slope of the maximum density line was result of average, which was determined by different stand sites and densities Therefore the slope determined by the previous method poorly describes the self-thinning procedure of the maximum density stand. The self-thinning line (N-Dg curve) of plantation is reverse sigmoid, which can be simulated by modified Korf equation. It is concluded that the minimum asymptotic number of trees (N min) of self-thinning in plantation are positively correlated with initial density (N 0), while curve shape is related to site and initial density.
KeywordsStand density Self-thinning Modified Korf equation
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- 5.Aikman, D. P., and A. R. Watkinson. 1980. A model for growth and self-thinning in even-aged monocultures of plants. Ann.Bot. 45:419–247.Google Scholar
- 7.Mcfadden, G., and C. D. Oliver. 1988. Three-dimensional forest growth model relating tree size, tree number, and stand age: Relation to previous growth models and to self-thinning. For. Sci. 34:662–676.Google Scholar
- 11.Sprugel, D.G. 1984. Density, biomass, productivity, and nutrient cycling changes during stand development in wave-regenerated balsam fir. Forest. Ecol. Monogr. 54(1):23–43.Google Scholar
- 12.Sterba, H., and R. A. Monserud. 1993. The maximum density concept applied to uneven-aged mixed-species stands. For. Sci. 39(3):432–452.Google Scholar
- 16.Yoda, K., T. Kira, H. Ogawa, and K. Hozomi. 1963. Self-thinning in overcrowed pure stands under cultivated and natural conditions. J. Biol. Osaka City Univ. 14:107–109.Google Scholar
- 18.Zeide, B. 1987. Analysis of the 3/2 power law of self-thinning. Forest Sci. 33(2): 517–537.Google Scholar
- 19.Zeide, B. 1991. Self-thinning and stand density. Forest Sci. 37(2):517–536. ed and natural conditions. J. Biol. Osaka City Univ. 14:107–109.Google Scholar