Effects of soil-forming rocks and sprout ages on the bark quality of Pteroceltis tatarinowii
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摘要: 宣纸被誉为千年寿纸,国之瑰宝,但檀皮这一独特的宣纸原料质量参差不齐,影响了宣纸的生产规模和产品质量.该研究分析了生长在不同立地环境和不同条龄的檀皮质量差异.研究结果表明,生长在不同母岩发育土壤上和不同条龄的檀皮在基本密度、纤维长、纤维宽、纤维素含量、木素含量及聚戊糖含量上存在明显差异.其中,檀皮基本密度在0.21~0.36 g/cm3之间;檀皮纤维长度、宽度和平均长宽比值分别在2 181~2 730μm、9.8~12.0μm和184.8~250.5之间;檀皮纤维素含量、木素含量和聚戊糖含量分别在34.0%~41.0%、9.3%~11.5%和8.0%~9.8%之间.总体上以生长在石灰岩发育土壤上的3年生檀皮质量性状最优.Abstract: The Xuan paper(rice paper),which is white,soft,durable and non-absorbent,is made in an 18-step process from the bark of Pteroceltis tatarinowii and rice straw,and it is entitled as "the king of all kinds of papers".However,the variation of bark quality significantly affects the production size and quality of Xuan paper in China.Based on the investigation,the effects of soil-forming rocks and sprout ages on the bark quality of P.tatarinowii were studied in this paper.The results indicated that significant differences in basic density,fiber length,fiber width,ratio of fiber length to width,cellulose content,lignin content and pentosan content were observed in the barks growing on various soil-forming rocks and in the barks with different sprout ages(α=0.05).Among the above,the basic density of bark ranged from 0.21 to 0.36 g/cm3;fiber length,fiber width,and the ratio of fiber length to width for the bark were 2 181-2 730 μm,9.8-12.0 μm and 184.8-250.5,respectively;while the cellulose content,lignin content and pentosan content were 34.0%-41.0%,9.3%-11.5% and 8.0%-9.8%,respectively.Generally,the bark growing on the soil differentiated from limestone and harvested when the sprout age is three years old is optimal for making Xuan paper.
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Keywords:
- Pteroceltis tatarinowii /
- site conditions /
- sprout age /
- basic density /
- fiber shape /
- cellulose /
- lignin /
- pentosan content
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