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作 者:陈佳刚 Chen Jiagang(Forest Survey and Design Institute of Jilin Province,Changchun 130022,Jilin)
机构地区:[1]吉林省林业勘察设计研究院,吉林长春130022
出 处:《防护林科技》2022年第6期29-30,66,共3页Protection Forest Science and Technology
摘 要:利用梅河口市国有林总场森林资源调查复位样地数据,分析了天然次生林中紫椴的种群发展动态。结果表明:紫椴的龄级结构近似呈倒J形分布,种群中幼苗和幼树的数量较多;随着径级增大,存活个体的数量逐渐减少;紫椴种群的生命期望随龄级波动较大,呈先降低后增加再降低的趋势;相较于Deevey-Ⅲ,紫椴的种群存活曲线更趋近于Deevey-Ⅱ型曲线,存在3个死亡峰值,分别位于第Ⅰ、第Ⅳ和第Ⅸ龄级,死亡率分别为46.7%、71.1%和28.6%。In this paper,the development dynamics of Tilia amurensis population in natural secondary forest were analyzed based on the data of forest resource survey restoration plot in Meihekou State-owned Forestry Farm.The results showed that the age grade structure of Tilia amurensis population was approximately inverted reverse J-shaped and there were more saplings and young trees in the population.With the increase of diameter class,the number of surviving individuals decreased gradually.The life expectancy of Tilia amurensis population fluctuated greatly with the age class,showing a decreasing trend at first,then increasing and finally decreasing.Compared with Deevey-Ⅲ,the survival curve of Tilia amurensis population was closer to Deevey-Ⅱ.There were three death peaks in the survival curve of Tilia amurensis population,which located in the first,the fourth and the ninth age classes respectively,and the mortality rates were 46.7%,71.1%and 28.6%respectively.
分 类 号:S792.36[农业科学—林木遗传育种] S718.54[农业科学—林学]
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