摘要
以5个不同树龄、相同密度及管理措施的三倍体毛白杨纸浆林为对象,研究了其生物量、生物量分配及经济生物量与测树因子之间的关系,结果表明:不同树龄的三倍体毛白杨单株生物量之间存在显著差异,生物量与树龄之间以线性方程y=8.929 3x-8.278 4为最优,R2的值达到0.929 7;林木生物量在不同器官间的分配随树龄增大发生变化,干的生物量所占比率从造林的当年占总生物量的44.10%上升到68.44%,枝的生物量所占比率从2.14%上升到10.83%,根的生物量所占比率基本在5%左右,叶的生物量所占比率从8.93%下降到4.76%,而根桩的生物量所占比率从39.20%下降到8.58%;经济生物量与胸径及D2H之间以指数形式的拟合最优,方程分别为y=0.177 1D2.122 4、y=0.130 4(D2H)0.732,相关系数分别为R2=0.995 3、R2=0.994 7。
An experiment was conducted to study the biomass,biomass distribution,and relationship between biomass and measurement factors using five triploid Populus tomentosa plantations of different ages with the same density under the same management measures as testing objects.Results show that the whole plant biomass was significantly different between P.tomentosa trees of different ages,and the relationship between biomass and tree age could be described by a linear equation（R2=0.9297）.The biomass distribution in different organs changed with tree age,that is to say,the ratio of stem biomass to the total biomass increased from 44.1% in the first year after planting to 68.44% in September 2008,the ratio of branch biomass increased from 2.14% to 10.83%,the ratio of root biomass was about 5%,the ratio of leaf biomass decreased from 8.93% to 4.76%,and the ratio of stump biomass decreased from 39.20% to 8.58%.The optimization models between biomass and diameter at breast height（D） or the combination of D and tree height（H） were obtained as y=0.1771D2.1224,y=0.1304（D2H）0.7320,with correlation coefficients of 0.9953,0.9947 respectively.
出处
《东北林业大学学报》
CAS
CSCD
北大核心
2010年第1期1-3,共3页
Journal of Northeast Forestry University
基金
"十一五"科技支撑项目(2006BAD3202B-2)
关键词
杨树
三倍体毛白杨
纸浆林
经济生物量
Poplar
Triploid Populus tomentosa
Pulp plantations
Biomass
