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象限模拟样地和模拟样地实质都是借助林木在林地配置的某种假设格局与林木距离的关系计算每公顷林木株数,并以此估测单位面积蓄积量的。但无论采用哪种假定格局,都离不开对现实自然配置的林木距离量测,而自然配置的个体林木在距离上的分布按一般认为是随机的(见GW考克斯著《普通生态学实验手册》和E.C.皮洛著《数学生态学引论》等)。本文拟从这一普通结论出发,对象限模拟样地,全距、中距和四边形模拟样地的准确度加以讨论,并以西陵实验结果说明之。
Quadratically simulated plots and simulated plot plots are based on the assumption that the forest in the configuration of a hypothetical pattern and the distance between the trees to calculate the number of trees per hectare, and thus to estimate the volume per unit area. However, no matter what kind of hypothetical pattern is adopted, it is inseparable from the measurement of tree distance to the natural configuration of the reality. However, the distribution of the natural trees in the distance from the natural distribution is generally considered to be random (see GW Cox, Common Ecology Experimental Handbook “and EC Pilot,” Introduction to Mathematical Ecology ", etc.). Based on this general conclusion, this paper will discuss the accuracy of object-based simulation of sample plots, full-range, medium-range and quadrangular simulation plots.