雨淋对不同泡桐品系木材颜色的影响  

Effect of Rain on the Wood Color of Different Paulownia Strains

作　　者：许雅雅 常德龙 胡伟华 黄文豪 张云岭 Xu Yaya;Chang Delong;Hu Weihua;Huang Wenhao;Zhang Yunling(Key Laboratory of Non-timber Forest Germplasm Enhancement&Utilization of State Forest Administraion,China Paulownia Research Center,Zhengzhou 450003,P.R.China)

机构地区：[1]经济林种质创新与利用国家林业和草原局重点实验室(国家林业和草原局泡桐研究开发中心),郑州450003

出　　处：《东北林业大学学报》2021年第9期90-94,共5页Journal of Northeast Forestry University

基　　金：中国林业科学研究院中央级公益性科研院所基本科研业务费专项资金项目(CAFYBB2017ZX003-13);国家林业和草原局林业科学技术推广项目([2019]-38,2020133140)。

摘　　要：以白花泡桐(Paulownia fortunei)、毛泡桐(Paulownia tomentoda)、兰考泡桐(Paulownia elongata)、楸叶泡桐(Paulownia catalpifolia)、毛白33(PaulowniaבTefu(TF)33’)、豫林1号(Paulownia fortunei CL‘YL01’)6品系泡桐木材为研究对象,测量木材雨淋处理前后及自然老化过程中亮度(L^(*))、变红度(a^(*))、变黄度(b^(*))、总色差(ΔE)、白度(W)等色度指标,分析6品系泡桐材色差异、同种泡桐不同立地的材色、泡桐不同部位材色、泡桐材色随时间变化趋势、雨淋对泡桐材色的影响,探索主要泡桐栽培资源的木材颜色特点、雨淋对材色的优化效果、泡桐材色变化规律。结果表明:不同品系泡桐的材色具有显著性差异,其中白花泡桐木材的白度、亮度最高,分别比最低的毛泡桐木材高6.52、6.35;甘肃兰考泡桐木材与河南兰考县兰考泡桐木材的各色度指标均无显著性差异,其各色度指标相差均不超过1;泡桐木材不同部位材色差异很大,轴向的木材白度与亮度由大到小依次为顶部、中部、下部,径向的木材白度与亮度由大到小依次为心部、边部、中间部位;随着时间的变迁,材色有劣化趋势,半年过后材色趋于稳定呈缓慢下降趋势;雨淋后,材色更为均一,色差显著变小,白度和亮度明显升高,其中毛泡桐木材亮度和白度提升最高,分别提升9.00、7.44。This experiment was conducted to evaluate the characteristics of wood color of the main Paulownia cultivation resources,the optimization effect of rain treatment on the color of the Paulownia wood,including P.fortunei,P.tomentoda,P.elongata,P.catalpifolia,and excellent clones of TF 33 and Yulin No.1.The brightness(L^(*)),redness(a^(*)),yellowing degree(b^(*)),total color difference(ΔE),whiteness(W)of wood before and after rain treatment and natural aging process were measured under five aspects:the difference of the color of the six kinds of Paulownia,the color of the same species of Paulownia in different site conditions,the color of different parts of Paulownia,the color change of Paulownia wood with time,and the influence of rain on the color of Paulownia.The results showed that there were significant differences in the color of different kinds of Paulownia,W and L^(*)of P.fortunei were the highest,which were 6.52 and 6.35 higher than the lowest P.tomentoda,respectively.The chromaticity indexes of P.elongata in Gansu and Lankao prefecture in Henan Province were not different significantly,the difference of each chromaticity index did not exceed 1;the color of different parts of Paulownia wood varied greatly,and W and L^(*)of the wood in the axial direction are the top,middle,and bottom in descending order,and W and L^(*)of the wood in the radial direction are the heart,the edges and the middle in descending order.The change of the color with time has a tendency to deteriorate,after half a year,the color tends to be stable and shows a slow downward trend.After the rain,the color of the wood is more uniform,the color difference is significantly smaller,and W and L^(*)are obviously higher after raining treatment,W and L^(*)of P.tomentoda increased mostly,increasing by 9 and 7.44,respectively.

关 键 词：泡桐 木材颜色 木材脱色 雨淋 

分 类 号：S781[农业科学—木材科学与技术]