尾巨桉2种留萌密度的幼林生长比较  

The Growth Comparison of Eucalyptus urophlla × E. grandis Sprout Forests in Two Sprout Numbers Reserved

作　　者：陶怡[1] 陈厚荣[1,2] 明安刚[1] 温远光[2] 全昭孔 周国福[2,3] 

机构地区：[1]中国林业科学研究院热带林业实验中心,广西凭祥532600 [2]广西大学林学院,南宁530004 [3]广西国有东门林场,扶绥532108

出　　处：《广西林业科学》2013年第4期399-401,共3页Guangxi Forestry Science

基　　金：广西林业科技项目(桂科2009[08]);国家教育部留学回国人员科研启动基金项目(19972832)

摘　　要：为探讨留萌密度对尾巨桉(Eucalyptus urophlla×E.grandis)萌芽林生长量的影响,分4个生长时期(0.3年生,1.4年生,2.3年生和3.3年生)对广西东门林场尾巨桉2种留萌密度(留萌1株和留萌2株)的萌芽林的生长量进行了调查研究。结果表明:2种留萌密度下桉树萌芽林的胸径,树高及林分蓄积量均有不同程度的差异。留萌1株的萌芽林平均树高和平均胸径均显著高于留萌2株的萌芽林,而且这种差异会随林龄的增加而增加;而留萌2株的林分蓄积量表现出高于留萌1株的萌芽林的态势,但差异随着林龄的增加而减小。In order to illustrate the effect of sprout numbers reserved on the growth of Eucalyptus urophlla x E. grandis sprout forests, the growth of sprout forests in two sprout numbers reserved （ 1 sprout reserved and 2 sprouts reserved） in four growth period （0. 3 year, 1.4 year, 2.3 year, 3.3 year） was studied in Guangxi Dongmen state forest farm. The results showed that tree height, DBH and stand volume were dif- ferent in the two sprout numbers reserved. The average tree height and DBH in the 1 sprout reserved were significantly higher than those of the 2 sprouts reserved and the difference increased with the stand age. On the contrary, the stand volume in the 2 sprouts reserved was higher than that of the 1 sprout reserved, and the difference decreased with the stand age.

关 键 词：尾巨桉 留萌密度 生长量 林龄 

分 类 号：S792.39[农业科学—林木遗传育种]