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本文从种群生态学和干扰生态学的角度出发,通过皆伐样地方法对大兴安岭北部兴安落叶松采伐迹地幼年种群的年龄结构进行了初步研究.根据兴安落叶松幼年种群年龄分布的18个特征,采用数学分类的方法,将其年龄结构分为后程型、前程型和全程型三大类.其中两个大类又可细分为6个亚类:长程型、短程型(后程型);长长型、短长型、长短型和短短型(全程型).卡平方(χ~2)检验表明,影响幼年种群年龄结构的主要因素为伐前林分结构、伐后种源和伐后时间,采伐方式和林型等因子的影响未达到显著水平.采伐迹地内三种不同的地面干扰条件下年龄结构的差异很大,主要表现在年龄极差、年龄标准差、偏度等方面.
Based on the characteristics of population ecology and disturbance ecology, the age structure of Larix principis-rupprechtii deciduous population in north of Daxing’an Mountains was studied by using clear-cut sampling method.According to 18 characteristics of age distribution of Larix gmelinii population, Using the method of mathematical classification, the age structure is divided into three major categories, ie, the following types: the former, the latter, and the latter.Among them, the two major categories are subdivided into 6 sub-categories: long-range, short-range (Χ ~ 2) test showed that the main factors influencing the age structure of juvenile population were the structure of the forest before cutting, the provenance after cutting and The effects of cutting time, harvesting methods and forest types on the soil waterlogging did not reach the significant level.The differences of age structure under three different ground disturbance conditions in the logging sites were quite different, mainly in the areas of very poor age, standard deviation of age, skewness and so on aspect.