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实验形数具有正形数不受树高影响及胸高形数测算容易的特点,并且同一树种在较小区域和较大区域的林木株数,按实验形数级的分布状态基本一致。但从实验形数的变动幅度上讲,在较小区域和较大区域内是有很大差别的。研究结果表明:林分平均直径,平均树高基本相同时,在较小区域内实验形数的变动幅度为0.32~0.47,极值差为0.15,而在较大区域内实验形数的变动幅度为0.23~0.47,极值差为0.24。
The experimental shape has the characteristics that the positive number is not affected by the height of the tree and the height of the chest height is easy to calculate. And the distribution of the number of trees in the smaller area and the larger area of the same species is basically the same. However, in terms of the variation of the experimental shape, there is a big difference between the smaller area and the larger area. The results showed that: when the average diameter and average tree height of stands were basically the same, the variation range of experiment shape number was 0.32-0.47 and the difference of extreme value was 0.15 in the smaller area, while the variation range of experiment shape number 0.23 ~ 0.47, the extreme value difference is 0.24.