长白山北坡椴树阔叶红松林群落主要树种的年龄结构研究

AGE STRUCTURE OF MAIN TREE SPECIES IN COMMUNITY OF TILIA BROADLEAF KOREAN PINE FOREST ON NORTHERN SLOPE OF CHANGBAI MOUNTAINS

通过对长白山林区椴树阔叶红松林伐根的大量调查 ,认为红松种群是由不同年龄阶段的群团状斑块组成 ,以多世代群居 ,优势世代之间没有一定的严格间隔期 ,在年龄结构图上往往出现两个或两个以上高峰。阔叶树在天然红松林中的分布呈群团状或散生 ,阔叶树的年龄也为异龄性 ,也为多世代共居。红松与阔叶树之间存在明显的动态消长关系 ,同龄伴生 ,异龄混生 ,形成复层异龄的针阔混交林 ,年龄结构与年生长关系的数学模型表明年生长量与年龄有正相关趋势 ,但林木年龄达到老龄时 。

Based on a lot of field investigation of stumps in Tilia broadleaf Korean pine forest,the results showed that Korean pine forest was composed of grouped patched trees with different ages.The dominated generations had not showed strict difference.The community age structure always appeared two or more peaks.The distribution of broadleaf tree species in Korean pine forest was grouped or scattered.Age distribution of broadleaf trees was uneven\|aged.There existed apparent species number increase and decrease relation between broadleaf species and Korean pine.So,it shaped multi\|storied and mixed forest.The model of age structure and growth showed their positive correlation trend,but growth began to lessen when woods had grown into old age.