基于非线性混合模型的日本落叶松木材密度与弹性模量模拟  

Modeling Wood Density and Elastic Modulus with Nonliear Mixed Models for Larix kaempferi

作　　者：陈东升[1] 张守攻[1] 张瑞富[2] 孙晓梅[1] CHEN Dong-sheng;ZHANG Shou-gong;ZHANG Rui-fu;SUN Xiao-mei(Research Institute of Forestry,Key Lab for Forest Tree Breeding,Chinese Academy of Forestry,Beijing 100091,China;Design Institute of Forestry Survey and Planning of Daxing’an Mountain of SFA,Jiagedaqi 165000)

机构地区：[1]中国林业科学研究院林业研究所国家林业局林木培育重点实验室,北京100091 [2]国家林业局大兴安岭林业调查规划设计院,加格达奇165000

出　　处：《温带林业研究》2018年第4期19-29,共11页Journal of Temperate Forestry Research

基　　金：国家自然基金重点项目(31430017);"十二五"科技支撑课题(2015BAD09B01)

摘　　要：本文以SilviScan测定的20个日本落叶松无性系60个木芯共4 320个逐年早晚材材性数据为基础,结合30株29年和40年解析木的实测材性数据,应用非线性混合模型分别构建了木材密度、弹性模量与年龄的预测模型,为定量预测日本落叶松的材性特征及准确掌握无性系间或单木间材性特征随年龄的变异提供依据。结果表明:考虑遗传效应的混合模型较好地体现了不同无性系间的材性变异,预测精度显著优于基础模型,R2提高了30.4%～55.8%;通过补充成熟材的材性数据,以单木水平作为随机效应建构了反映单木差异的木材密度和弹性模量混合预测模型,R^2分别较基础模型提高了48.7%和57.5%,可有效预测单木生长过程的材性特征。年轮木材密度和年轮弹性模量主要受晚材影响,早材的影响较小。早材密度随年龄的增加而减小,年轮木材密度与晚材密度变化趋势一致,表现出随年龄先增加后减小的趋势;早材弹性模量随年龄无明显变化,年轮弹性模量与晚材弹性模量变化趋势一致,表现出随年龄的增加而增大,后期增势变缓。Based on 4 320 the wood properties data of 60 cores of 20 Japanese larch clones measuring by SilviScan,combined with wood properties data of 30 sample trees for 29 and 40 years,the mixed model of the wood density and elasticmodulus for distinguishing early wood with late wood were constructed,respectively,to quantitatively predict the wooddensity and elastic modulus,and understand variation of wood properties with age among clones. The results showed that themixed model with genetic effects could well reflect the wood properties variation among different clones,and the predictionaccuracy was significantly better than the basic model,R^2 increased by 30.4%-55.8%. By supplementing the data of maturewood properties,R^2 of the mixed prediction model of wood density and elastic modulus with tree level as random effect was 48.7% and 57.5% higher than the basic model,respectively,they may effectively predict individual tree wood properties. The wood density and elastic modulus are not affected by early wood. but mainly by late wood. The density of early wooddecreased with age,the wood density of ring was the same as that of late wood,showing first increasing and then decreasingwith age. The elastic modulus of early wood did not obviously change with age,the elastic modulus of ring was the same asthat of the late wood,which increased with age and then the increasing trend slowed down gradually.

关 键 词：日本落叶松 无性系 木材密度 弹性模量 混合模型 

分 类 号：S781.23[农业科学—木材科学与技术]