摘要
采用体积法和质量法测定树皮率,排水法测定木材体积,研究了红锥5种家系木材的生材性质。研究结果表明,D家系的树皮体积百分率最高,达到10.02%,B、D、P、R、X家系的树皮体积百分率平均值为8.81%。B家系的树皮质量百分率最高,达到13.70%,X家系的树皮体积百分率和树皮质量百分率明显低于其他家系。B、D、P、R、X家系的树皮质量百分率平均值为10.20%;家系间心材率差异不大,平均值为43.79%;家系间南北向生材密度变化规律基本一致,北向从髓心向外均逐渐减小,南向从髓心向外先减少后增大;南北向基本密度数值差异均不大,北向靠髓心、中间及边材等3个位置基本密度平均值分别为0.525、0.583、0.576 g·cm^(-3),南向靠髓心、中间及边材位置3部分的基本密度平均值分别为0.475、0.500、0.539 g·cm^(-3);除南向B系列和R系列外,家系间生材含水率南北向变化规律一致,从髓心向外均逐渐减小,中间部分和边材部分差异不大,B系列和R系列的南向从髓心向外先减小后增大,靠近髓心部分的生材含水率明显较高。
The green wood properties for five different Castanopsis hystrix wood of the family were studied by means of the volume,and the green wood volume.The result showed that the bark volume percentage of family D was 10.02%,the highest,and the average of all families were 8.81%.The bark quality percentage of family B was 13.70%,the highest,and average of all families were 10.20%.The bark volume percentage and bark quality percentage of family X was lower than the other families.The differences of heartwood percentage between families were not obvious,and the average was 43.79%.The green density change of south and north was similar,a decreasing direction from pith to sapwood on north and a decreasing and then increasing direction from pith to sapwood on south.The differences of basic density among families were not obvious,The basic density in three points from pith to sapwood on north were 0.525 g cm^(-3),0.583 g·cm^(-3)3 and 0.576 g cm^(-3),respectively,and on south were 0.475 g·cm^(-3),0.500 g·cm^(-3),0.539 g·cm^(-3),respectively.Except for family B and R,the moisture content of green wood change of south and north was similar,a decreasing direction from pith to sapwood,and small difference between the middle part and sapwood part.Green wood moisture content had a decreasing and then increasing trend from pith to sapwood on south of family B and R,and significantly higher near the pith part of wood.
作者
刘晓玲
陈松武
谭长强
陈艳
陈桂丹
何林韩
LIU Xiao-ling;CHEN Song-wu;TAN Zhang-qiang;CHEN Yan;CHEN Gui-dan;HE Lin-han(Forestry Research Institute/Guangxi Research Center of Cultivation of Wood Resources and Quality Engineering Technology,Nanning,Guangxi Zhuang Autonomous Region 530002)
出处
《陕西林业科技》
2023年第3期37-40,51,共5页
Shaanxi Forest Science and Technology
基金
广西重点研发计划(桂科AB22035071)
广西林业科技推广示范项目(2023GXLK03)。
关键词
红锥
家系
生材
树皮率
心材率
密度
生材含水率
Castanopsis hystrix
bark percentage
heartwood percentage
density
moisture content
