| 摘要: |
| 【目的】研究桑枝、杜仲条和柳条木材的化学成分及各主要化学成分含量在树干高度上的变化规律，为木材更合理更有效的利用提供依据。【方法】以桑枝、杜仲条和柳条木材为研究对象，参考我国木材化学成分分析标准中规定的系列测定方法对其纤维素、综纤维素、木质素以及抽提物(热水抽提物、10 g/L NaOH抽提物、苯醇抽提物)、灰分和含水率6个指标进行分析，并与重组木常用木材沙柳、杨木、速生杉木及棉秆进行比较。【结果】在树干不同高度上，对桑枝木材而言，纤维素含量差异达显著性水平，基部显著高于中部和梢部，中部与梢部差异不显著；木质素含量差异达极显著性水平，基部极显著高于中部和梢部，中部与梢部差异不显著；综纤维素含量基部和梢部极显著高于中部，基部与梢部差异不显著；灰分含量和含水率差异不显著。对杜仲条木材而言，苯醇抽提物含量梢部极显著高于基部和中部，基部与中部差异不显著；综纤维素、纤维素含量基部和中部极显著高于梢部，基部与中部差异不显著；灰分含量差异不显著；含水率差异达显著性水平，中部与梢部显著高于基部，中部与梢部差异不显著。对柳条木材，各部位综纤维素和木质素含量差异达极显著水平，基部均极显著高于梢部；灰分含量差异不显著；含水率差异达显著性水平，基部显著高于梢部。【结论】就木材化学成分而言，3种木材的基部和中部木材性能优于梢部，3种木材均可作为生产重组木的优质原料,且杜仲条更优。 |
| 关键词: 桑枝 杜仲条 柳条 化学成分 |
| DOI： |
| 分类号: |
| 基金项目:国家林业公益性行业科研专项（201304511） |
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| Chemical components and their variations along tree stem of young branches of Ramulus mori,Eucommia ulmoides and Tamarix ramosissima |
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LI Yuxiu,LEI Yafang
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| Abstract: |
| 【Objective】Contents of the chemical components from branches of young Ramulus mori,Eucommia ulmoides and Tamarix ramosissima were determined and their variations along tree stem were analyzed to provide basis for their efficient utilization.【Method】According to the Chinese standards for wood chemical component analysis,the chemical components (cellulose,holocellulose,lignin,extracts by hot water,10 g/L NaOH and alcohol benzene,ash,and moisture) of branches of young R.mori,E.umoides and T.ramosissima were measured and analyzed.Finally,the results were compared with scrimbers,such as Psmmophiles,Birch,Grow-up chinese fir,and Cotton stalk.【Result】For young R.mori branches,the cellulose content at the base was significantly higher than that at the middle and the end,and the difference between the middle and the end was not significant.The lignin content at base was very significantly higher than that at the middle and the end,and the difference between the middle and the end was not significant.The holocellulose contents at the base and the end were very significantly higher than that at the middle,and the difference between the base and the end was not significant.The differences in ash and moisture contents along the tree stem were not significant.For E.ulmoides wood,the content of benzene-alcohol extracts at the end was very significantly higher than that at the base and the middle,and the difference between the base and the middle was not significant.The difference in ash along the tree stem was not significant.The moisture contents at the middle and the end were very significantly higher than that at the base,and the difference between the middle and the end was not significant.For T.ramosissima,very significant difference was observed between the contents of holocellulose and lignin.The holocellulose and lignin contents at base were very significantly higher than that at the middle.The difference in ash contents along the tree stem was not significant.The moisture content at the base was very significantly higher than that at the end.【Conclusion】In aspect of chemical components,the wood properties at the bottom and middle blade were better than those at the top blade.All these three woods were good raw materials for scrimber and E.ulmoides was the best. |
| Key words: young Ramulus mori branches Eucommia ulmoides branches Tamarix ramosissi branches chemical component |
