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贺兰山位于内蒙古阿拉善高原和宁夏银川平原之间,油松林是该区重要的植被类型之一。针对贺兰山自然保护区天然油松林种群的分布特点,在封育区、旅游区和矿区分别选择有代表性的样地,以样地调查数据为依据,采用统计学方法对其种群结构和空间分布格局等进行研究。结果表明:不同样地的油松种群均处于稳定状态,且年龄结构基本相同,但是实生苗和幼树生长发育不良,种群呈现一定的衰退趋势,需要实施必要的人为抚育措施。由于生境中资源分配较均匀,不同油松种群在样地尺度上均表现为随机分布。
Helan Mountain is located between Inner Mongolia Alashan Plateau and Yinchuan Plain in Ningxia, the pine forest is one of the important vegetation types in this area. According to the distribution characteristics of natural Pinus tabulaeformis forest in Helan Mountain Nature Reserve, representative plots were selected in the enclosure area, tourist area and mining area respectively. Based on the survey data of the plots, statistical methods were used to analyze their population structure and spatial distribution Pattern and other research. The results showed that the population of Pinus tabulaeformis was in a steady state and the age structures were basically the same. However, the growth of seedlings and saplings was not well developed, and the population showed a declining trend. The necessary artificial breeding measures should be implemented. Due to the more uniform distribution of resources in habitats, different populations of Pinus tabulaeformis appear randomly distributed on the plot scale.