不同林龄史密斯桉树能源林现存量与能量研究  

Standing Crop and Energy of Eucalyptus smithii Energy Plantation at Different Ages

作　　者：韩斐扬[1] 周群英[1] 陈少雄[1] 肖敏 梁金喜 

机构地区：[1]国家林业局桉树研究开发中心,广东湛江524022 [2]广东省樟木头林场,广东东莞523616

出　　处：《热带作物学报》2010年第2期298-303,共6页Chinese Journal of Tropical Crops

基　　金：中央级公益性科研院所基本科研业务费专项"桉树能源林栽培和主要品种木材热值研究"(No.CAFINT2008C13);国家林业局"948"项目"优良能源树种丛生桉选育技术引进"(No.2007-4-12)资助

摘　　要：对云南省牟定县2～6年生史密斯桉的现存量和能量进行研究。结果表明:史密斯桉林分各器官现存量以及林分现存量都随林龄的增加而增大,林分现存量年增长量在第6年达到最大,为22.52t/(hm2·a)。不同林龄史密斯桉器官现存量排序为干>根或枝>皮>叶,器官平均灰分含量排序为叶>皮>根>枝>干,平均干重热值排序为叶>干>枝>根>皮,平均去灰分热值排序为叶>枝>干>根>皮。史密斯桉树植株体的平均灰分含量和平均去灰分热值随林龄的增加而减小,而平均干重热值却在第4年达到最大。植株体平均灰分含量为1.17%～2.65%,平均干重热值为18.61～18.86kJ/g,平均去灰分热值为18.83～19.29kJ/g。林分总能量随林龄的增大而增大,其年增长量在第6年达到最大,为414.59GJ/(hm2·a)。只从现存量和能量的角度考虑,云南省牟定县的史密斯桉树能源林收获周期应为6a。The standing crop and energy of Eucalyptus smithii plantations aged 2-6 years in Mouding county,Yunnan Province were investigated.The results showed the standing crop of various organs and plantation increased with the stand age.The standing crop of the plantations increased to the highest（22.52 t/ha/year）at age 6.The standing crop of various organs was in the order of stemroot or branch barkleaf;the average ash content（AC）of various organs was leafbarkrootbranchstem;the average gross caloric values（GVC）of various organs were leafstembranchrootbark,and;the average ash free caloric values（AFCV）of various organs were leafbranchstemrootbark.The average AC and AFCV of individual trees decreased as the stand age increased,but the average GCV of individual trees was the highest at age 4.The AC,GVC and AFCV of individual trees averaged 1.17%～2.65%,18.61～18.86 kJ/g and 18.83～19.29 kJ/g,respectively.The total energy of the plantations increased with the stand age to the maximum（414.59 GJ/ha/year）at age 6.It is concluded that it is best to harvest energy plantations of E.smithii at age 6 when their standing crop and energy are considered.

关 键 词：史密斯桉 现存量 能量 能源林 

分 类 号：S792.39[农业科学—林木遗传育种]