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| Axial Component Characteristics and KP+AQ Pulping Performance of Four Kinds of Poplar |
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| DOI：10.11981/j.issn.1000-6842.2014.02.1 |
| Key Words:four kinds of poplar； chemical composition； fiber morphology； pulping and papermaking； axial variations |
| Fund Project:国家自然科学基金（基于细胞骨架排列的应力木细胞壁形成机理研究，31100419）；安徽省自然科学基金（杨树应拉木纤维素与丝蛋白共混机理研究，1208085MC37）。 |
| Author Name | Affiliation | | 张利萍1 | 1.安徽农业大学林学与园林学院，安徽合肥，230036 | | 孙夏杰1 | 1.安徽农业大学林学与园林学院，安徽合肥，230036 | | 王书强1 | 1.安徽农业大学林学与园林学院，安徽合肥，230036 | | 高 慧1 | 1.安徽农业大学林学与园林学院，安徽合肥，230036 | | 傅贤敏2 | 2.河南省金太阳林业科技有限公司，河南邓州，474100 | | 常玉飞2 | 2.河南省金太阳林业科技有限公司，河南邓州，474100 |
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| Abstract: |
| Chemical composition， fiber morphology， pulping and papermaking performances of four kinds of poplar sampling at the heights of 1.3 m， 3.3 m， 5.3 m and 7.3 m were measured and compared. Contents of ashes， hot water extracts and 1%NaOH extracts were higher in the samples at 1.3 m and 7.3 m， indicating they were higher at the two ends and lower in the middle parts of the tree. The contents of klason lignin and acid-soluble lignin increased gradually. Holocellulose contents were higher at 1.3 m and 5.3 m. Pentosan contents reduced from 1.3 m to the 7.3 m. Poplar clone 107 had the highest axial average total lignin content 26.98%. Poplar clone 2001 had the lowest 25.56%. Poplar clone 46 had the highest axial average holocellulose content 81.82%. The fiber lengths of the four kinds of poplar were longer at 1.3 m and 5.3 m. The maximum of the ratio of fiber length to the width was at 5.3 m， and the minimum was at 7.3 m. The minimum of the ratio of fiber lumen to the double cell walls was at 5.3 m， and the maximum was at 7.3 m. The poplar clone 107 had the maximum of fiber lengths and the ratio of fiber length to the width and the minimum of the ratio of lumen to the double cell walls. The poplar clone 69 had the minimum fiber length. The poplar clone 2001 had the maximum of ratio of lumen to the double cell walls. The kappa numbers of the pulp were lower at 1.3 m and 5.3 m and the highest at 7.3 m. The pulp yield and viscosity were higher at 1.3 m and 5.3 m. Tensile strength， tear index and bust index of the four kinds of poplar were higher at 1.3 m and 5.3 m. In summary， the paper properties of the samples at 1.3 m and 5.3 m were better， followed by that at 3.3 m and 7.3 m. The order of pulping and papermaking properties from better to worse was poplar clone 107， poplar clone 69， and poplar clone 46 and poplar clone 2001. |
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