| 杨树新无性系木材性质的变异研究 |
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| 引用本文： | 方升佐,杨文忠.杨树新无性系木材性质的变异研究[J].林业研究,2003,14(4):263-268. |
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| 作者姓名： | 方升佐 杨文忠 |
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| 作者单位： | CollegeofForestResourcesandEnvironment,NanjingForestryUniversity,Nanjing210037,P.R.China |
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| 基金项目： | This study was supported by National Natural Science Foundation of China, (No. 30070616). |
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| 摘 要： | The wood basic density, cellulose content and fiber form were investigated for all sample trees at breast height (1.3m) in seven poplar clones, and at 0 (butt), 5.6, 9.6, 13.6, 17.6, 19.6 and 21.6 m for clone Nanlin-95 and Nanlin-895, respectively,for providing information on variation patterns of wood density, fiber characteristics and holocellulose content within trees and among clones. The results showed that significant variations about wood density, cellulose content, fiber diameter and the ratio of fiber length to diameter existed among poplar clones examined. Variance analysis indicated that there were significant differences in wood basic density, fiber length, fiber diameter and cellulose content among the growth rings, which had an increasing tendency along the direction from pith to bark. The significant differences also existed in wood basic density, fiber length and fiber diameter at different tree height. The mean wood basic density had a general increase trend with increasing height of trees and the lowest was found at the base, while fiber length and fiber diameter had a general decline pattern with increasing height of trees and the biggest value was observed at the height of 5.6 m. Regression analysis indicated that the relationship between examined wood properties and growth ring number (cambial age), and the relationship between examined wood properties and tree height can be described by polynomial functions.
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| 关 键 词： | 杨树 无性系 木材特性 密度 纤维特性 纤维素含量 变异 纤维长度 纤维直径 年轮 |
| 收稿时间： | 19 September 2003 |
Interclonal and within-tree variation in wood properties of poplar clones |
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| Fang?Sheng-zuoEmail author,Yang?Wen-zhong.Interclonal and within-tree variation in wood properties of poplar clones[J].Journal of Forestry Research,2003,14(4):263-268. |
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| Authors: | Email author" target="_blank">Fang?Sheng-zuoEmail author Yang?Wen-zhong |
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| Institution: | (1) College of Forest Resources and Environment, Nanjing Forestry University, 210037 Nanjing, P.R. China |
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| Abstract: | The wood basic density, cellulose content and fiber form were investigated for all sample trees at breast height (1.3 m) in seven poplar clones, and at 0 (butt), 5.6, 9.6, 13.6, 17.6, 19.6 and 21.6 m for clone Nanlin-95 and Nanlin-895, respectively, for providing information on variation patterns of wood density, fiber characteristics and holocellulose content within trees and among clones. The results showed that significant variations about wood density, cellulose content, fiber diameter and the ratio of fiber length to diameter existed among poplar clones examined. Variance analysis indicated that there were significant differences in wood basic density, fiber length, fiber diameter and cellulose content among the growth rings, which had an increasing tendency along the direction from pith to bark. The significant differences also existed in wood basic density, fiber length and fiber diameter at different tree height. The mean wood basic density had a general increase trend with increasing height of trees and the lowest was found at the base, while fiber length and fiber diameter had a general decline pattern with increasing height of trees and the biggest value was observed at the height of 5.6 m. Regression analysis indicated that the relationship between examined wood properties and growth ring number (cambial age), and the relationship between examined wood properties and tree height can be described by polynomial functions. |
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| Keywords: | Poplar clone Wood basic density Fiber characteristics Cellulose content Clonal variation Within-tree variation |
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