修枝对尾巨桉林分生长及无节材形成的影响  

Effect of Pruning on Growth and Knot Free Timber Production of Eucalyptus grandis × E. urophylla

作　　者：周建清 

机构地区：[1]长泰岩溪国有林场,福建长泰363902

出　　处：《桉树科技》2016年第1期17-21,共5页Eucalypt Science & Technology

基　　金：福建省科技重点项目"杂交桉新品种选育及示范推广"(2005N057)

摘　　要：开展尾巨桉不同修枝时间和修剪强度试验,分析修枝对桉树生长及材性的影响,结果表明:不同修枝时间和强度对林分生长和木材材质影响较大,从不同修枝时间看,适宜的修枝方案为D处理即造林当年7、8、10月份和第二年5、8月份各修枝1次,强度为1/5。该修枝方案与对照相比,林分平均树高、胸径、材积和高径比分别提高了24.3%、11.3%、56.8%和11.7%。从第二年8月6日不同修剪强度对林分生长来看,每次修枝1/5的B处理效果最好,修枝1/5的B处理与修枝3/5的E处理相比林分平均树高、胸径、材积和高径比分别提高了10.2%、6.4%、19.7和%3.4%。综合考虑不同修枝强度和不同修枝处理对尾巨桉林分生长和可获得无节材长度的影响,认为先后进行多次1/5修剪强度的D处理修剪方法最好。Pruning of Eucalyptus grandis × E. urophylla at different ages and intensities was examined in relation to subsequent growth and wood properties. Results showed that pruning at different ages and intensities had significant effects on tree height growth and wood properties of Eucalyptus. Pruning treatment D proved to have the greatest impact with increases of 24.3%, 11.3%, 56.8% and 11.7% over the control treatment for average tree height, DHB, stem volume and height to diameter ratio respectively. Comprehensive comparison of pruning treatments ranked other treatments in the order of BCE, with the method involving pruning 1/5 each time working best. Treatment B with pruning 1/5 each time of B treatment provided significant increases of 10.2%, 6.4%, 19.7% and 3.4% for average tree height, DHB, stem volume and height to diameter ratio over treatment E. Considering the different pruning treatments, the best for production of knot free timber and growth involved treatment D applied several times to prune 1/5 each time.

关 键 词：桉树 修枝 生长性状 材性 

分 类 号：S758.52[农业科学—森林经理学]