次生落叶阔叶林林隙的紫椴造林试验  

Tilia amurensis Afforestation Experiment in the Gap of Secondary Deciduous Broad-leaved Forest

作　　者：李佳明 郑金萍[2] 郭忠玲[2] 范春楠[1] 王圣钧 Li Jiaming;Zheng Jinping;Guo Zhongling;Fan Chunnan;Wang Shengjun(Beihua University,Jilin 132013,P.R.China)

机构地区：[1]北华大学林学院,吉林省吉林市132013 [2]北华大学,吉林省吉林市132013

出　　处：《东北林业大学学报》2021年第6期1-5,共5页Journal of Northeast Forestry University

基　　金：“十三五”国家重点研发计划课题(2017YFD0600606);吉林省科技发展计划项目(20190301084NY)。

摘　　要：在吉林省中东部典型次生落叶阔叶林中,随机选取15个面积大小不等的林隙,以紫椴1年生实生苗为材料,在各林隙中开展了紫椴造林试验。通过各栽植点位光照强度的测定和聚类分析,以及对紫椴成活率、高径生长状况、生物量的测定,对比分析林隙环境对紫椴定植、生长的影响。结果表明:所选林隙均为小林隙,其光照强度日均值不足空地的12%。各光照强度分区栽植苗木数量比例随林隙面积的增大未呈规律性变化。中光区、弱光区较利于紫椴苗木存活,个体死亡集中于8月;强光区成活率相对较小,且苗木成活率随时间缓慢降低。紫椴强光区的株高年生长量略高。各光照强度区的8月株高生长量均显著高于7、9月。中光区的地径年生长量显著高于强光区、弱光区。弱光区、强光区的地径月生长量初期增长快,中光区末期积累大。紫椴高径比随生长的推移而逐渐降低,在各分区间的差异不显著。整株、地上、各器官生物量均以中光区略高,但仅有叶生物量与弱光区差异显著。各分区的光照强度差异并未影响紫椴生物量分配比例。The afforestation experiment of Tilia amurensis was carried out in the gaps,the typical secondary deciduous broad-leaved forests in the mid-eastern region of Jilin Province was taken as the study object,and 15 gaps with varying sizes were randomly selected,and 1-year-old seedlings of T.amurensis were used as experimentalmaterials.Through the measurement andcluster analysis of light intensity at each planting site,as well as the determination of the survival rate,high-diameter growth status,and biomass of T.amurensis,the influence of the gap environment on the settlement and growth of T.amurensis was analyzed for the protection and restoration of T.amurensis resources.The gaps are small,and the daily average light intensity is less than 12%of the open space.The proportion of planting points in each light intensity zone did not show obvious changes with the increase of the gap area.The medium and low light areas are more conducive to the survival of T.amurensis seedlings,and individual deaths are concentrated in August.The survival rate in the strong light area is relatively low,and the survival rate of the seedlings does not change significantly.The plant annual height growth of T.amurensis is slightly higher in the strong light area,and T.amurensishas significantly higher annual ground diameter growth in the medium light area.The plant height growth in August is significantly higher than that in July and September,while the ground diameter growth increased rapidly in the low and strong light areas at the initial stage,and accumulated more at the end of the medium light area.The height-diameter ratio of T.amurensis decreased with the growth,and the difference between the sub-regions was not obvious.The biomass of the whole plant,above ground,and various organs isrelatively higherin the medium light area,and the leaf biomass is significantly higher than the weak light area.The light intensity difference of each sub-region has no effects on the biomass distribution.

关 键 词：林隙 紫椴 造林 光照强度 生长状况 生物量 

分 类 号：S725.71[农业科学—林木遗传育种]