CAJ | 학술논문

基于在大兴安岭新林林业局不同林分条件的天然林中设置的18块50 m×20 m的标准地数据，对不同林分类型的混交度、角尺度和大小比3个空间结构参数进行了分析。研究结果表明：全部林分中白桦、落叶松的零混交度频度最大，随着0～1混交强度逐渐减小，白桦、落叶松树种的生长势态低于山杨、樟子松，针阔混交林、落叶松林和白桦林的混交度均值分别为0．42、0．25、0．26；以白桦和落叶松为参照树的结构单元的角尺度均值为0．54，接近0．517，针阔混交林、落叶松林和白桦林的角尺度均值都为0．54；依据大小比，大兴安岭天然林分中林木之间的竞争相当激烈，其中山杨的优势木占32％，高于白桦和落叶松，说明以山杨为参照树的结构单元中，其他树种处于不利竞争地位，落叶松白桦混交林、落叶松林和白桦林的落叶松树种的优势频度都分别小于白桦优势频度。
기우재대흥안령신림임업국불동림분조건적천연림중설치적18괴50 m×20 m적표준지수거，대불동림분류형적혼교도、각척도화대소비3개공간결구삼수진행료분석。연구결과표명：전부림분중백화、락협송적령혼교도빈도최대，수착0～1혼교강도축점감소，백화、락협송수충적생장세태저우산양、장자송，침활혼교림、락협송림화백화림적혼교도균치분별위0．42、0．25、0．26；이백화화락협송위삼조수적결구단원적각척도균치위0．54，접근0．517，침활혼교림、락협송림화백화림적각척도균치도위0．54；의거대소비，대흥안령천연림분중림목지간적경쟁상당격렬，기중산양적우세목점32％，고우백화화락협송，설명이산양위삼조수적결구단원중，기타수충처우불리경쟁지위，락협송백화혼교림、락협송림화백화림적락협송수충적우세빈도도분별소우백화우세빈도。
With the data of 18 sample plots of 50 m×20 m in natural mixed forests with different stand condition in Xinlin Forest-ry Bureau of Daxing’an Mountain, we analyzed three forest spatial structure parameters including mingling index, uniform angle index and neighborhood comparison.The growing states of larch and white birch are better than Populus davidiana and Pinus sylvestris.The mean mingling index of the mixed larch and white birch stand, larch stand and white birch stand are 0.42, 0.25 and 0.26, respectively.The average of mingling for the structure cell of larch and white birch was 0.54 which approached 0.517.The mean uniform angle index of all the mixed larch and white birch stand, larch stand and white birch stand is 0.54.With the neighborhood comparison, there is violent competition among the trees in Daxing’ an Mountain.The dominant frequency of Populus davidiana is higher than that of larch and white birch.The dominant fre-quency for the larch in coniferous and broadleaved mixed forest, larch forest and white birch forest are lower than that of white birch.