摘要
林分空间结构在很大程度上反映了林分的生长潜力.以吉林省蛟河市苇塘沟落叶松人工成熟林为样地,林下更新红松幼树为目标树,4株邻近上层木为相邻木;以开敞度和角尺度空间结构为指标分析上层林木对林下更新红松幼树高生长的影响.结果表明:当开敞度大于0.3时,林下幼树高生长随着开敞度的增大而增加;角尺度呈随机分布或聚集分布时,可以减小幼树承受的竞争压力.
The spatial structure of stand reflects the growth potential of stand to a great extent.The article takes mature Larix gmelinii plantation as the study plot located in Weitang Ditch,Jiaohe City,Jilin Province.Saplings of Korean pine were taken as target trees,and four adjacent upper trees were taken as adjacent trees.The influence of upper trees on the height growth of understory Korean pine saplings were analyzed based on the spatial structure indexes of opening degree and uniform angle.The results showed that when the opening degree index was greater than 0.3,the height growth of saplings increased with the increase of opening degree index.When the uniform angle index was randomly distributed or focused distributed,the competitive pressure of saplings could be reduced.
作者
李国伟
刘冠兵
刘盛
罗晓君
王斌
何箭
王承刚
LI Guowei;LIU Guanbing;LIU Sheng;LUO Xiaojun;WANG Bin;HE Jian;WANG Chenggan(Forestry College of Beihua University,Jilin 132013,China;Forest Survey and Design Institute of Jilin Province,Changchun 130022,China;Linjiang Forestry Bureau,Baishan 134600,China;Fengman District State-owned Forest Farm of Jilin City,Jilin 132013,China)
出处
《北华大学学报（自然科学版）》
CAS
2022年第5期570-575,共6页
Journal of Beihua University（Natural Science）
基金
吉林省科技发展计划(重点研发)项目(2020042091NC)
吉林省教育厅科学技术研究项目(JJKH20200053KJ).
关键词
落叶松人工林
林分空间结构
开敞度
角尺度
幼树生长
Larix gmelinii plantations
stand spatial structure
opening degree index
uniform angle index
sap-ling growth
