4年生尾叶桉间伐效果  

Thinning Effect on Growth of 4-year-old Eucalyptus urophylla Plantation

作　　者：李天会[1] 陈少雄[1] 吴志华[1] 曹加光[1] 张绵耀 

机构地区：[1]国家林业局桉树研究开发中心,广东湛江524022 [2]湖南双牌县林业科技推广站,湖南双牌425200

出　　处：《桉树科技》2010年第1期37-40,共4页Eucalypt Science & Technology

基　　金：国家"十一五"科技支撑课题"桉树和相思速生丰产林培育关键技术研究与示范"(2006BAD24B02);科技部农业科技成果转化课题"桉树大径材培育技术转化"(2007GB24320418);国家林业局推广计划"桉树珍贵用材新品种与高效栽培技术示范"[2007]84号;湛江市科技招标项目"桉树大径材高效生产新技术的研究与示范"

摘　　要：对4年生尾叶桉林分进行不同强度间伐,2a后的调查结果表明:间伐对林分平均胸径影响达显著水平;对树高生长有促进作用,但差异不显著;对单株材积生长的影响差异极显著。间伐强度越大,单株材积增长量越大。3种间伐处理的林分蓄积年增长量差异显著。根据总蓄积量和间伐后林分蓄积年生长量的变化,本试验以间伐强度60%为最佳处理。4-year-old E.urophylla plantations were thinned by different intensity,their growth were investigated after two years.The results showed that thinning had significant effects on mean diameter at breast height（DBH） and individual volume;but thinning effect on tree height was not significant,which could promote tree height growth.The more thinning intensity,the more increment of individual volume .There were significant differences in MAI （Mean Annual Increment） of plantation among 3 thinning intensities.According to total volume and MAI,thinning intensity of 60% was the best treatment in this experiment.

关 键 词：尾叶桉 间伐效果 林分生长 

分 类 号：S753[农业科学—森林经理学]