CAJ | 학술논문

角尺度是一个描述林木空间分布格局的新参数，它通过描述邻近木围绕中心木的均匀性来判定林木分布格局，对空间结构具有很强的解析能力，其应用方兴未艾。为了制定基于 Voronoi 图计算角尺度时的相关标准，通过1000次实验，模拟产生了1000个随机分布面积为1hm2的大样地，确定了基于 Voronoi 图研究角尺度的标准角为360°／（n ＋1），通过拉依达准则确定了随机分布时角尺度均值的取值范围为[0.327，0.357]，并结合角尺度的定义推理出，均匀分布时角尺度均值的取值范围为[0，0.327），团状分布时角尺度均值的取值范围为（0.357，1]。通过聚集指数和角尺度两种方法分别分析了福寿林场杉木生态公益林中6个实际调查样地的林木空间分布格局，结果是一致的。这一标准的提出为进一步完善角尺度理论，扩大其应用范围，起到了重要的推动作用。
각척도시일개묘술림목공간분포격국적신삼수，타통과묘술린근목위요중심목적균균성래판정림목분포격국，대공간결구구유흔강적해석능력，기응용방흥미애。위료제정기우 Voronoi 도계산각척도시적상관표준，통과1000차실험，모의산생료1000개수궤분포면적위1hm2적대양지，학정료기우 Voronoi 도연구각척도적표준각위360°／（n ＋1），통과랍의체준칙학정료수궤분포시각척도균치적취치범위위[0.327，0.357]，병결합각척도적정의추리출，균균분포시각척도균치적취치범위위[0，0.327），단상분포시각척도균치적취치범위위（0.357，1]。통과취집지수화각척도량충방법분별분석료복수림장삼목생태공익림중6개실제조사양지적림목공간분포격국，결과시일치적。저일표준적제출위진일보완선각척도이론，확대기응용범위，기도료중요적추동작용。
The uniform angle index was a new parameter for describing the distribution pattern of tree po-sitions.It described the degree of spatial regularity of the neighboring trees around a given reference tree.This parameter,accepted by more and more researchers,can be used to analyze complicated forest spatial structures.In order to put forward standards for uniform angle index,based on Voronoi diagram,in this paper,1000 randomly distributed plots with 1hm2 (100m ×100m)each one,were simulated and ana-lyzed.And the standard angle of the uniform angle index based on Voronoi diagram was formulated by 360°/(n +1 ).The critical value for the identification of tree random distribution pattern was discussed within the interval μ±3σ.The mean value of the uniform angle index for the random case was defined by the bounds[0.327,0.357].It can be inferred by the definition of the uniform angle index that a Wv value of less than 0.327 was most likely from a regular distribution,values exceeding 0.357 were most likely from a clumped distribution.Finally,the tree spatial distribution pattern of six plots in Cunninghamia lan-ceolata non-commercial forest were analyzed by two different methods,i.e.aggregation index and uniform angle index,and they were same.This new judgment criterion to analyze the type of tree spatial distribu-tion represented an important improvement of the uniform angle index theory.