南京林业大学学报(自然科学版) ›› 2015, Vol. 39 ›› Issue (03): 125-129.doi: 10.3969/j.issn.1000-2006.2015.03.023

• 研究论文 • 上一篇    下一篇

杂交鹅掌楸应力木解剖特征及光谱分析

石江涛, 王 丰, 骆嘉言   

  1. 南京林业大学材料科学与工程学院,江苏 南京 210037
  • 出版日期:2015-05-30 发布日期:2015-05-30
  • 基金资助:
    收稿日期:2014-07-04 修回日期:2015-01-04
    基金项目:江苏高校优势学科建设工程资助项目(PAPD); 南京林业大学高学历人才基金项目(GXL201313)
    第一作者:石江涛,讲师。E-mail: shijt@njfu.edu.cn。
    引文格式:石江涛, 王丰, 骆嘉言. 杂交鹅掌楸应力木解剖特征及光谱分析[J]. 南京林业大学学报:自然科学版,2015,39(3):125-129.

Anatomical feature and spectroscopy of reaction wood in Liriodendron chinense×L. tulipifera

SHI Jiangtao, WANG Feng, LUO Jiayan   

  1. College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China
  • Online:2015-05-30 Published:2015-05-30

摘要: 通过显微观察及傅里叶红外光谱和X-射线衍射光谱分析,对杂交鹅掌楸弯曲树干和倾斜树干的应力木特征进行了研究。结果表明:在弯曲树干中,应拉区的胶质木纤维含量极少,导管数、导管平均直径及组织比量与对应区和过渡区有明显差异; 应拉区木材红外光谱特征与对应区和过渡区相似; 应拉区中吸收强度比值(I1 505/I1 739)大于对应区和过渡区,说明其木质素含量较高; 应拉区和过渡区纤维素结晶度显著低于对应区。倾斜树干中表现出相反规律,应拉区富含胶质木纤维(26.1%),应拉区导管数、导管平均直径均小于过渡区木材; 应拉区木材在波数1 739 cm-1和1 505 cm-1的吸收峰强度均低于对应区和过渡区木材; 应拉区和过渡区纤维素结晶度明显高于对应区。据此认为杂交鹅掌楸应力木特征产生于倾斜生长的树干。

Abstract: The properties of reaction wood from bending and inclination stem in Liriodendron chinense× L. tulipifera was investigated by microscopic, FTIR and XRD. The results showed that in tension zone the gelatinous fiber ratio was the lowest and the number and mean diameter of vessel and tissue proportion was significant difference comparing with that in opposite and transition zone in bending stem. The IR characteristics in tension zone were similar to the opposite and transition zone. The relatively ratio of I1 505/I1 739 was higher in tension zone than other two zones and indicated that it has higher lignin content. The cellulose crystallinity in tension and transition zone was observably lower than that in opposite. On the contrary, in tension zone the gelatinous fiber ratio was higher(26.1%)and the number and mean diameter of vessel was decreased comparing to that in transition zone of inclination stem. The peaks intensity at 1 739 cm-1 and 1 505 cm-1 were decreased in tension zone than that in other two zones. This indicated that the hemicellulose and lignin content was lower in tension zone. The cellulose crystallinity in tension and transition zone was higher dramatically than that in opposite. All of these suggested that the properties of tension wood were affected by stem growth morphology in Liriodendron chinense×L. tulipifera.

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