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采用4块100m×100m的天然林样地材料,分别利用角尺度和双相关函数分析4块大样地中不同面积的窗口(小样地)对应林木个体的空间分布格局。结果表明,小样地面积不同其对应林木的空间分布格局也不同,随着样地面积逐渐变大,对应林木的空间分布格局趋于稳定,这意味着森林结构分析必须在一定大小的样地上进行。根据本研究资料,样地面积最小应为2500m2。
Four 100 m × 100 m natural forest plots were used to analyze the spatial distribution patterns of individual trees in four large plots of different size (small plots) using the angular scale and the dual correlation function. The results showed that the spatial distribution patterns of the corresponding trees were different with different plots’ area. With the plots becoming larger, the spatial distribution of the corresponding trees tended to be stable, which meant that the forest structure analysis must be carried out on a certain size plots . According to the study data, the sample area should be a minimum of 2500m2.