摘要
以5年生54个南方型杨树无性系为材料,对其胸径、树高和材积生长量进行对比分析。结果表明:不同杨树无性系胸径、树高均存在极显著性差异,且受遗传控制较强,广义遗传力分别为0.846 5和0.605 0,遗传变异系数分别为13.95%、3.25%。不同杨树无性系胸径、树高连年生长量呈先增长后降低的趋势,造林后第3年平均年生长量最大,5年生时林木材积累积量均处于快速增长阶段。杨树无性系LA09-N56、LA06-N30、LA09-N23、TN01-49具有树皮光滑、干形通直,落叶晚等特征,与目前湖区普遍应用的良种XL-80、XL-90、XL-75生长量相当,均表现优良,且适宜长江及洞庭湖区滩地生长。
This paper took a comparative analysis on the DBH(Diameter at Breast Height),tree height and volume growth of 54 five-year-old Populus deltoides clones.The result indicated that the Populus deltoides clones faced significant differences in DBH and tree height;they were genetically controlled;their broad-sense heritability were 0.8465 and 0.6050,and their genetic variation coefficient were 13.95%and 3.25%respectively.In the third year after afforestation,the mean annual increment is largest and the accumulated volume of the five-year-old tree all stayed in the rapid growth stage.The introduced Populus deltoids LA09-N56,LA06-N30,LA09-N23 and TN01-49 featured smooth bark,straight trunk and late leaf fall period.Compared with the improved variety XL-80,XL-90 and XL-75 that are widely planted in the Dongting Lake District,they are equivalent in increment,excellent in performance and both suitable to grow in the bottomland of Yangtze River and Dongting Lake District.
作者
唐洁
汤玉喜
李永进
杨艳
吴敏
TANG Jie;TANG Yuxi;LI Yongjin;YANG Yan;WU Min(Hunan Academy of Forestry,Changsha 410004,China)
出处
《湖南林业科技》
2018年第1期1-5,共5页
Hunan Forestry Science & Technology
基金
湖南省重点研发计划项目(2016NK2160)
湖南省林业厅种苗专项(2017)
湖南省林业科技计划项目(XLK201506)
关键词
滩地
美洲黑杨
生长量
beach land
Populus deltoides
growth
