| 摘要: |
| 【目的】比较5个杨树无性系木材的抗腐朽菌能力，并以腐朽后各阶段木材材色的变化为依据，定量预判木材腐朽程度，为无损检测技术在木材保护中的应用提供依据。【方法】以欧美杨107杨(以下简称107)、中汉22杨(以下简称H22)、皖林1号杨(以下简称Z3)、B3和Z9 5个无性系杨树木材为研究对象，就其接种白腐菌后的质量损失率、不同时段木材基本密度及材色的变化为评判指标，比较各无性系杨树木材抗腐朽菌的能力，并通过材色变化来预判木材腐朽程度。【结果】在白腐菌侵染60 d后，各无性系杨树木材的质量损失率均大于45%，腐朽等级均属于第Ⅳ级，是不耐腐树种，并且杨树木材极易受心腐。腐朽后杨树木材的基本密度均有不同程度的下降，在腐朽40 d时，107杨、H22、Z3、B3和Z9分别较正常材下降4.81%，9.88%，2.24%，14.21%和1.60%。腐朽后，材色变化曲线与木材腐朽过程相对应，可以用来定性判断木材腐朽程度；杨树心材由正常到腐朽，材色变化的临界值是：明度63～66，色调5～15，色饱和度17～29；杨树边材相应的临界值是：明度62～69，色调6～14，色饱和度17～30。【结论】受白腐菌侵染120 d后，5个杨树无性系的质量损失率依次为H22>B3>Z9>107>Z3，说明H22在这5个无性系中最不耐腐，Z3相对而言耐腐性较强。木材腐朽后，可以参考明度、色调和色饱和度3个材色指标预测杨树无性系的腐朽程度。 |
| 关键词: 杨树人工林 生物腐朽 木材密度 材色 |
| DOI： |
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| 基金项目:国家自然科学基金项目(31270598)；安徽农业大学学科骨干培育项目（2014xkpy-16） |
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| Natural decay resistance and rotten prediction for different clones of poplar plantations |
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ZHA Chaosheng,WANG Caiyun,PENG Fan,et al
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| Abstract: |
| 【Objective】The resistance to rot fungi and color of wood from five poplar clones at different decay stages were determined to predict wood decay level and provide basis for application of non destructive detection technique in wood preservation.【Method】The wood weight loss rate after being inoculated with white rot fungi and differences in wood density and color of poplar clones 107 (Populus euramericana ‘Neva’),H22 (P.deltoides cv.‘Zhonghuan 22’),Z3 (P.deltoids cv.‘Wanlin 1’),B3 (P.deltoids cv.‘B3’) and Z9 (P.deltoids cv.‘Z9’) in a forest station in western Tianchang,Anhui were determined.The resistance to rot fungi was compared and the wood decay grade was predicted based on wood color change. 【Result】The wood weight loss rates of all poplar clones were more than 45% at 60 d after white-rot fungi infection. The decay level was the fourth grade.The poplar trees were perishable and the wood was easily infected by heart rot.The densities of rotted 107,H22,Z3,B3,and Z9 wood at 40 d after white-rot fungi infection were decreased by 4.81%, 9.88%, 2.24%, 14.21% and 1.60%,respectively.The change of wood color corresponded with the rotting course,and it can be used to predict decaying degree.The critical values of L*,H,and C* value were 63-66,5-15,and 17-29 for heartwood and 62-69,6-14 and 17-30 for sapwood. 【Conclusion】After 120 d white rot fungi infection,the wood weight loss rates of 5 poplar clones were in the order of H22>B3>Z9>107>Z3.Three basic wood color parameters (L*,H and C*) can be used to predict decaying level. |
| Key words: poplar plantations biological decay wood density wood color |
