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自然稀疏线是林分密度管理图中五组曲线之一。林分密度管理图是根据密度效应规律,用密度和各测树因子之间的数量关系,建立各种数学模型而编制的。自然稀疏线就是描述未经人工抚育间伐的林分的自然稀疏过程的数学模型,是笔者在编制铜鼓县杉木人工林林分密度管理图时推导并应用的,现提出供生产上参考。
Natural sparse lines are one of five sets of curves in stand density management plots. Stand density management map is based on the law of density effects, with the density and the relationship between the number of trees measured by the establishment of a variety of mathematical models and prepared. The natural sparse line is a mathematical model that describes the natural sparse process of stand without thinning. It is derived and applied by the author in the process of compilation of stand density management diagram of Chinese fir plantation in Tonggu County, and is proposed for production reference.