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以内蒙古大兴安岭北部兴安落叶松原始林、渐伐更新林、皆伐更新林3种森林类型为研究对象,对其天然更新幼苗的大小级结构及空间分布格局进行了研究。结果表明:原始林与渐伐更新林的更新幼苗大小级结构均属于稳定型种群,有利于种群的连续更新;而皆伐更新林幼苗大小级结构属于下降型种群,不利于种群的连续更新。3种森林类型的幼苗分布格局均呈聚集分布,聚集程度等级由强到弱顺序为:原始林>皆伐更新林>渐伐更新林。并提出了兴安落叶松合理经营管理的建议。
In this paper, three forest types of Larix gmelinii, Horchwiciflorum, Larix gmelinii and Clear Forest were studied in the northern part of the Greater Xing’an Mountains in Inner Mongolia. The size-class structure and spatial distribution pattern of natural regeneration seedlings were studied. The results showed that the size structure of newer seedlings in both virgin and forested forests belonged to the stable population, which was conducive to the continuous population renewal. However, the size-class structure of the younger plantation belonged to the descending population, which was not conducive to continuous population renewal. The distribution patterns of seedlings in three forest types all showed aggregation distribution, and the order of aggregation degree from strong to weak was as follows: virgin forest> clear cutting renewal forest> gradual cutting renewal forest. And put forward the suggestion of reasonable management of Larix gmelinii.