摘要
本文旨在探讨不同演替阶段红松阔叶混交林林分空间结构特征,为明确各林分结构与功能、合理保护和经营红松阔叶混交林提供科学依据。采用TOPCON全站仪在吉林省蛟河市林业实验区管理局不同演替阶段红松阔叶混交林内分别设置4块100 m×100 m监测样地,并进行群落调查,在Visual Studio平台上编写应用程序对不同林分的混交度和大小比数进行计算。结果表明:不同演替阶段林分的平均混交度在0.66和0.78之间,树种之间隔离程度较大;4种林分中树种数量最多的前5个树种平均混交度取值范围为0.69～0.82,其中过熟林最大,近熟林最小,按平均混交度数值大小排序为过熟林>中龄林>成熟林>近熟林。中龄林、近熟林、成熟林和过熟林林分平均胸径大小比数分别为0.48、0.53、0.49、0.49,平均树高大小比数分别为0.48、0.50、0.49、0.49,平均冠幅大小比数分别为0.34、0.42、0.38、0.41。可以看出,胸径和树高平均大小比数取值范围相近,反映林木大小分化程度上具有一致性,而与平均冠幅大小比数取值范围具有一定的差异,说明用树高及胸径计算大小比数得出的结果较冠幅更为可靠。不同演替阶段红松阔叶混交林整体上呈现出一个由不同树种组成、处于强度混交向极强度混交过渡的复杂森林群落,且树种之间大小分化程度明显。
In order to determine the structure and functions of forest stands at different successional stages and provide scientific basis for the reasonable protection and management on Korean pine and broad-leaved mixed forest,the stand spatial structure of Korean pine and broad-leaved mixed forests at different successional stages was analyzed.TOPCON total station was used to set up four 100 m×100 m monitoring plots in each of the four Korean pine and broad-leaved mixed forest at different successional stages in Jiaohe forestry administration of experimental area,Jilin province and community survey was conducted.The computation programs were compiled in the platform of Visual studio in order to calculate mingling index and neighborhood comparison.Results showed that the mingling index of different stands ranged between 0.66 and 0.78 and the isolation degree between different tree species was greater.The average mingling index of the top five tree species in the four stands ranged between 0.69 and 0.82,among which the over-mature forest was the largest and the near-mature forest was the smallest.The order of the stands in terms of mingling index was:over-mature forest>middle-aged forest>mature forest>near-mature forest.The neighborhood comparison for the four stands were computed,and that of diameter at breast height(DBH)were 0.48,0.53,0.49,0.49,that of tree height were 0.48,0.50,0.49,0.49,and that of tree crown were 0.34,0.42,0.38,0.41.The domains of neighborhood comparison of DBH and tree height were closer and reflected similar degree of differentiation.However,the domain of tree crown neighborhood comparison was different.The comparison results indicated that the neighborhood comparison of DBH and tree height was reliable than that of tree crown.Generally,the Korean pine and broad-leaved mixed forest at different successional stages presented a mixed forest community with different tree species and strong mingling to very strong mingling and the isolation among different tree species was obvious.
作者
许文秀
吴金卓
林文树
刘艳琪
XU Wenxiu;WU Jinzhuo;LIN Wenshu;LIU Yanqi(College of Engineering and Technology,Northeast Forestry University,Harbin 150040,Heilongjiang,China)
出处
《中南林业科技大学学报》
CAS
CSCD
北大核心
2018年第10期106-111,共6页
Journal of Central South University of Forestry & Technology
基金
国家重点研发计划重点专项(2017YFC050400503)
国家自然科学基金项目(31500587)
中央高校基本科研业务费专项资金资助(2572015CA01)
关键词
阔叶混交林
混交度
大小比数
空间结构
broad-leaved mixed forest
mingling index
neighborhood comparison
spatial structure
作者简介
许文秀,硕士研究生;通信作者:吴金卓,副教授;E-mail:wjz@nefu.edu.cn。
