摘要
笔者对7a生的20个杨树品种的生长量、形率、材性和树皮厚度等指标进行了差异性分析。结果表明:欧美46、鲁山杨、圣山杨和欧美14在单株材积和木材基本密度显著优于对照(中嘉8号和中潜3号),材积遗传增益为47.50%、34.55%、34.51%和22.05%;胸高形率、绝对形率和正形率的变化范围分别为0.5678～0.6876、0.5211～0.6557、0.5349～0.6661,半常绿杨在形率指标上显著优于其它品种,而其它品种之间没有显著差异;纤维指标和树皮厚度没有显著差异。
The authors analyze indicators on difference in increment,form-quotient,feature,and bark thinckness over 20 Ppulus varieties of 7-year old Populus L..The results show that Pupulus x Canadensis 46,Populus L..Liaoningensis Z.Wang et H.D.Chen Sp.nov,Populus L..gaixianensis Z.Wang et H.D.Chen Sp.nav and Pupulus x Canadensis 14 in individual volume and basic density is supper than contrast（Zhongjia NO.8 and Zhongqian NO.3）.Genetic gain of timber volume is 47.50%、34.55%、34.51% and 22.05% respectively.The range of breast height form-quotient,absolute form-quotient and normal form-quotient are 0.567 8～0.687 6,0.521 1～0.655 7,0.534 9～0.666 1 respectively.The form quotient index of semi-evergreen Pupulus significantly is better than other varieties,and other varieties are not significantly difference.Fiber index and thickness of the tree bark have no significantly difference.
出处
《湖北林业科技》
2008年第1期12-15,共4页
Hubei Forestry Science and Technology
基金
湖北省"南方型杨树优良品种选育研究"(2001AA201B01)部分内容
关键词
杨树品种
材积
形率
差异性
Populus L.varieties
volume
form-quotient
difference
