南方型杨树新无性系生长对比试验研究  

Comparative study on growth of clones of South Type Poplar

作　　者：唐洁[1] 汤玉喜[1] 李永进[1] 杨艳[1] 吴敏[1] TANG Jie;TANG Yuxi;LI Yongjin;YANG Yan;WU Min(Hunan Academy of Forestry,Changsha 410004,China)

机构地区：[1]湖南省林业科学院,湖南长沙410004

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)

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.

关 键 词：滩地 美洲黑杨 生长量 

分 类 号：S792.11[农业科学—林木遗传育种]