华家岭防护林带不同树种生长特征分析  

Growth caracteristics of different tree species for shelterbelt in Huajialing

作　　者：赵赫然[1] 王辉[1] 段雅楠[1] 

机构地区：[1]甘肃农业大学林学院,兰州730070

出　　处：《干旱区资源与环境》2015年第1期48-52,共5页Journal of Arid Land Resources and Environment

基　　金：甘肃省高等学校研究生导师科研项目"黄土丘陵区低效公益林改造技术及生态风险评价"(1202-01)资助

摘　　要：以地处陇东黄土丘陵区的华家岭防护林带不同树种为研究对象,采用样地调查法,对不同树种、不同密度、不同林龄防护林的生长特征进行调查研究。结果表明:1)属幼龄林的22a生云杉纯林和20a生油松纯林的平均胸径、平均树高、单株蓄积量现已超过或接近了平均林龄37.5a的成(过)熟杨树纯林;2)华家岭防护林带中各类林分的平均胸径、平均树高均与林分密度呈负相关性。受林分密度的影响,区域内云杉×杨树混交林的生长状况略好于杨树纯林,云杉纯林和油松纯林的生长状况优于云杉×油松、云杉×落叶松混交林;3)华家岭云杉林在10a^15a、25a^30a期间的胸径生长较为显著,20a^25a期间的树高生长较为显著。Different tree species of shelterbelts in Huajialing located in the Loess hilly region were taken as the research object in this paper. The growth index of different stand types and different ages of shelterbelts were researched,and the growth characteristics of Huajialing artificial shelterbelt were analyzed according to the method of site investigation. The results are as follows： 1The indices,including DBH,mean height and stand volume of P. asperata pure forest and P. tabuliformis pure forest which belongs to young forest were better than or close to P. hopeiensis pure forest with the average age achieved 37. 5a. 2The mean DBH and mean height in each forest showed negative correlation with stand density. The growth situation of P. hopeiensis theropencedrymion was better than pure forest,while P. asperata pure forest and P. tabuliformis pure forest were better than the theropencedrymion. 3The DBH growth in P. asperata forest was more significant during 10 a - 15 a and 25 a - 30 a,while the height growth was more significant during 20a - 25a.

关 键 词：防护林 生长特征 林分密度 林龄 华家岭 

分 类 号：S757[农业科学—森林经理学]