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利用角尺度、大小比数和混交度3个林分空间结构参数,分析了黄土高原柴松(Pinus tabulaeformisf.shekannesis)群落的空间结构特征。结果表明:1)该林分的树种组成为柴松:辽东栎(Quercus liaotungensis)∶其他树种=7∶2∶1,林分密度为3064株.hm-2,柴松种群优势度明显。2)柴松林林分平均混交度为0.33,处于弱度混交到中度混交过渡时期,种间隔离程度较小。3)柴松林林分平均角尺度为0.57,整个林分呈团状分布。4)林分平均胸径大小比为0.52,平均树高大小比为0.53,林木大小比数的分布较为均匀。胸径大小比和树高大小比在反映林木生长优势方面具有一致性。
Spatial structure parameters of Pinus tabulaeformis.skannesis community in the Loess Plateau were analyzed by using the spatial structure parameters of the angle dimension, size ratio and mixed degree. The results showed as follows: 1) The species composition of the stands was Quercus liaotungensis: other species = 7: 2:1, and the stand density was 3064 plants.hm-2. 2) The average mixing degree of Chaishonglin forest was 0.33, which was in the transitional period from weak mix to moderate mix, and the degree of interspecific segregation was small. 3) The average angular dimension of Chaishonglin forest was 0.57, and the whole forest was in a clumpy distribution. 4) The mean DBH size ratio was 0.52, the average height-to-height ratio was 0.53, and the distribution of wood-size ratio was more uniform. The DBH and tree height ratios are consistent in reflecting the superiority of tree growth.