作　　者： ; ; ; ; ; (刘斯通）; (梁瑞友）; (宋自力）; (唐强）;

机构地区： 广东省林木种苗管理总站广东广州510173

出　　处： 《中南林业科技大学学报》 2012年第9期20-23,共4页

摘　　要： 以生长量为选择指标对杉木Cunninghamia lanceolata初级种子园20年生子代林作优树选择,共18个优良单株(优树)入选,优树树高、胸径、单株材积现实增益分别达10.2%～55.1%、45.7%～96.3%、120.4%～423.3%。进一步分析发现,各生长性状(树高、胸径、单株材积)、树皮比率、木材基本密度与木材吸水性在优树间仍广泛变异。单株材积变幅为0.240 8～1.050 5 m3,变异系数(Cv)达40.9%;树皮比率CV值最高,达46.0%;优树XK02、XK04、XK07、XK13、XK14、XK17树皮比率皆<5%,出材率较高;共7株优树木材基本密度值高于优树群体均值,其余11株优树木材吸水性表现优良(高于优树群体均值)。性状相关性分析结果表明,优树各生长性状间为极显著正相关,木材基本密度与木材吸水性间则为极显著负相关。 A total of eighteen superior trees were obtained based on the selection of growth traits of the 20-year-old progenies from the first-generation seed orchard of Cunninghamia lanceolata.The realized-gain for growth traits of height,DBH（diameter at breast height） and volume were 10.2%～55.1%、45.7%～96.3%、120.4%～423.3%,respectively.Further analysis reveals that all the tested traits including height,DBH,volume and BR（bark ratio）,DEN（wood basic density） and WH（wood hygroscopicity） varied extremely among superior trees.Typically,the volume ranged from 0.2408 to 1.0505 m3 with a variation coefficient of 40.9%,while the bark ratio had the largest variation coefficient of 46.0%.The bark ratio trait for XK02,XK04,XK07,XK13,XK14,XK17 superior trees were all below 5%,supposed to be used cost-effectively in wood.Strikingly,seven superior trees displayed a higher level of DEN than that of the population mean（PM;the superior tree population）,while the others appeared to have a higher level of WH compared to PM.Herein,it was also found that the height,DBH and volume were positively correlated to each other extremely significantly among superior trees,while the adverse correlation for DEN with WH was observed（significance 0.01）.

关 键 词： 杉木 优树 生长性状 树皮比率 材质 性状相关

领　　域： [农业科学] [农业科学]