日本落叶松优良家系和无性系初步研究
2014-04-29徐慎东孙晓梅陈金良李道新王功芳黄祥丰祁万宜
徐慎东 孙晓梅 陈金良 李道新 王功芳 黄祥丰 祁万宜
摘要:为了探讨日本落叶松不同优良家系和无性系幼龄林的生长表现,本文以4年(苗龄2年生)优良家系和无性系试验林为研究对象,通过生长量调查和统计分析后,结果表明:日本落叶松优良家系和无性系成活率高,保存良好,成活率和保存率均值达到了89%和81%;日本落叶松优良家系2009SBZ11、2009SBZ20和优良无性系2009SBY1、2009SBY25生长最快,且差异显著。2009SBZ11、2009SBZ20家系立木单株平均树高较最低值751 cm(2009SBZ6、2009SBZ34)增长了近190%和189%;2009SBY1和2009SBY25无性系立木单株平均树高较最低值746 cm(2009SBY6)增长了近236%和249%。
关键词:日本落叶松;家系;无性系;生长量
中图分类号:S722.3+3,S791.223文献标识码:A文章编号:1004-3020(2014)03-0012-06
Primary Research on Fine Family and Clone of Larix Kaempferi
Xu Shendong(1)Sun Xiaomei(2)Chen Jinliang(1)Li Daoxin(1)Wang Gongfang(1)Huang Xiangfeng(1) Qi Wanyi(3)
(1.Yichang City Dalaoling National Forest FarmYichang443132;2. Research Institute of Forestry,
CAFBeijing100091;3. Yichang City Forestry InstituteYichang443112)
Abstract: In order to find the growth difference among young forest of superior families and clones of Larix Kaempferi, Investigation and statistical analysis on the growth increment of the fouryearold superior family and clone, the seedling age of which were 2-years-old were conducted. The result showed that Larix Kaempferi superior families and clones had high survival rate and preserving rate, which reached 89% and 81% respectively; In addition, the superior families 2009SBZ11, 2009SBZ20 and superior clones 2009SBY1, 2009SBY25 were the best; they grew most rapidly and the difference reached significant level. The mean single plant height of superior families 2009SBZ11 and 2009SBZ20 were 190% and 189% respectively higher than the minimum 751 cm(2009SBZ6、2009SBZ34); While the superior clones 2009SBY1 and 2009SBY25 were 236% and 249% respectively higher than the minimum 746 cm (2009SBY6).
Key words:Larix Kaempferi;family;clone;growth
日本落叶松Larix Kaempferi属松科Pinaceae落叶乔木,原产日本本州岛中部;我国最早引种于山东费县塔山林场 [1 ]。该树种因速生、优质、抗性强、干形通直、树形高大、适应性广等特点,而迅速成为中国北方和南方亚高山区的主要造林树种之一 [2 ]。为了保护、合理开发利用该树种优良种质资源,不断提升优良遗传品质,以达到工业用材林优质、高效和多抗的目标,同时为高世代育种材料的补充做好资源储备。本研究在上世纪80~90年代对优良日本落叶松56个次生家系 [3 ]、172个次生无性系 [4 ]及113个原生家系 [5 ]进行选择研究的基础上,于2010年再次开展了日本落叶松55个优良家系(25个)和无性系(30个)选择研究,现将结果整理如下。
1材料与方法
1.1试验地概况
试验林设在西陵峡北岸的宜昌市国有大老岭林场王爷庙伐区。大老岭林场地处我国地貌第二级台阶的东缘,属大巴山系荆山余脉,与江南武陵山余脉相对应。……
