天然落叶阔叶林不同年龄紫椴径生长差异及其对气候暖化的响应

摘要：

了解气候暖化对紫椴生长的影响是探究气候变化背景下天然落叶阔叶林生态系统结构和生产力特征的基础.为揭示不同年龄紫椴径向生长对气候因子响应的差异,以及1980年左右气温突增变化前后紫椴的径向生长变化及响应敏感性,运用树木年轮学方法分析了27块样地的121根紫椴年轮样本的数据,结果显示,随着气温增加紫椴胸径连年生长量稳定时间延长,胸径生长率随年龄的减小而逐渐提高,在1980年左右的气候温度突增变化前后,不同年龄阶段紫椴径生长特征呈明显差异.树龄小于60 a的紫椴胸径连年生长量、胸径生长率与胸径增长(30 a内)要明显高于60 a以上紫椴.气候暖化对研究区紫椴径向生长具有促进作用,且以年龄较小的紫椴对气温变化的响应更加敏感.

It is the basis research for revealing the structure and productivity characteristics of natural deciduous broad-leaved forest ecosystems under the climate change to understand the impact of climate warming on the growth of Tilia amurensis.In order to reveal the response differences of diameter at breast height(DBH)growth at different ages to climate factors,and to study the change dynamics and response sensitivity of Tilia amurensis before and after the sudden increase in temperature around 1980,a total of 121 tree ring samples from 27 plots were collected and analyzed in the current study.Results:with the increase of annual mean temperature,the stable time of continuous year-on-year DBH growth of Tilia amurensis increased,and the growth rate of DBH gradually increased with the decrease of age,which showed obvious differences under the impact of the sudden increase in climate temperature around 1980,and the annual growth,radial growth rate and DBH(within 30 years)of Tilia amurensis with the tree age of less than 60 years were higher than the trees with the age of more than 60 years.Conclusion:the climate warming promotes the DBH growth of Tilia amurensis in the study area,and the younger age is more sensitive to temperature changes.

作者：

范春楠 刘强 于舒洋 郭忠玲 郑金萍

Fan Chunnan;Liu Qiang;Yu Shuyang;Guo Zhongling;Zheng Jinping(Forestry College,Beihua University,Jilin 132013,China;Liaoning Bohao Land Technology Development Co.Ltd.,Shenyang 110033,China)

机构地区：

北华大学林学院 辽宁博昊土地科技发展有限公司

出处：

《betway官方app 学报：自然科学版》 CAS 北大核心 2021年第6期32-38,共7页

Journal of Henan Normal University(Natural Science Edition)

基金：

国家重点研发计划项目(2017YFD0600606) 吉林省科技发展计划项目(20190301084NY).

关键词：

紫椴 胸径生长 气候暖化 树龄

Tilia amurensis growth of DBH climate warming tree-age

分类号：

S718.51 [农业科学—林学]

天然落叶阔叶林不同年龄紫椴径生长差异及其对气候暖化的响应.pdf