摘要
对近年来引进的优质用材美国红橡纳塔栎(Quercus nuttallii)、水栎(Quercus nigra)和舒玛栎(Quercus shumardii)3个14年生树种的木材生长特性进行了研究,主要生长指标有单株平均材积、生材含水率、生长轮宽度以及基本密度。结果表明,纳塔栎单株平均材积最大,为0.134 6 m^3,水栎和舒玛栎分别为0.103 5 m^3和0.106 3m^3。纳塔栎、水栎和舒玛栎生材含水率平均值分别为71.76%、69.79%和71.97%;生材含水率径向变化均为:近髓心处高于近树皮处;纵向变化规律为:随着树高增加,含水率降低。生长轮宽度径向变化为:由髓心向外先增加后减小;纳塔栎、水栎、舒玛栎生长轮宽度平均值分别为7.69、7.20和7.40 mm。基本密度的径向变化为:由髓心向外呈增加趋势;纳塔栎、水栎和舒玛栎基本密度的平均值分别为0.60、0.61和0.64 g·cm^(-3)。3种美国红橡树种间基本密度差异显著,生长轮宽度不显著;种内生长轮宽度和基本密度均达到显著差异;树种×生长轮的交互,生长轮宽度达到极显著差异水平,而基本密度差异不显著。纳塔栎、水栎和舒玛栎的生长轮宽度和基本密度都与生长年龄呈回归相关,且回归水平达到极显著。
In this paper, the wood growth characteristics of three species of Quercus nuttallii, Quercus nigraand Quercus shumardii of 14 years introduced in recent years were studied. The main growth indicators include average volume per plant, green wood moisture content, growth ring width, and basic density. The results showed that the average volume of single plant Quercus nuttallii was the largest, which was 0.134 6 m^3, and those of Quercus nigra and Quercus shumardii were 0.103 5 m^3 and 0.106 3 m^3, respectively. The average moisture contents in green wood of Quercus nuttallii, Quercus nigra and Quercus shumardii were 71.76%, 69.79%, and 71.97%, respectively. The radial variation law of the moisture content in green wood was: near the medullary core was higher than that near the bark, and the longitudinal change law of the moisture content in the green wood was: as the height of the tree increased, the moisture content decreased. The average growth ring widths of Quercus nuttallii, Quercus nigra and Quercus shumardii were 7.69 mm, 7.20 mm, and 7.40 mm, respectively. The radial variation of the growth ring width was: firstly increased from the pith to outward and then decreased. The average basic densities of Quercus nuttallii, Quercus nigra and Quercus shumardii were 0.60 g·cm^-3, 0.61 g·cm^-3, and 0.64 g·cm^-3, respectively. The radial variation tendency of the basic density was: increased outward from the pith. The basic densities of Quercus nuttallii, Quercus nigra and Quercus shumardii showed significant differences at the 0.05 level, and the growth ring width was not significant;the differences of growth ring width and basic density were extremely significant between different growth rings;in the interaction effect of tree species × growth rings, the width of the growth ring reached a very significant difference level, but the basic density difference was not significant. The growth ring widths and basic densities of Quercus nuttallii, Quercus nigra and Quercus shumardiiwere all related to the growth age, and the regression level was extremely significant.
作者
王慧
潘彪
黄利斌
WANG Hui;PAN Biao;HUANG Libin(College of Materials Science and Engineering,Nanjing Forestry University,Nanjing 210037;Jiangsu Acad.emy of Forestry,Nanjing 211153)
出处
《安徽农业大学学报》
CAS
CSCD
2018年第6期1044-1048,共5页
Journal of Anhui Agricultural University
基金
江苏省科技计划项目"优质用材及观赏北美栎树良种选育"(BE2015370)资助
关键词
美国红橡
材积
生材含水率
生长轮宽度
基本密度
American red oak
wood volume
green wood moisture content
growth ring width
basic density
