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根系主要成分含量对根系固土效能的影响
引用本文:朱锦奇,王云琦,王玉杰,张会兰,白雪琪,李云鹏,刘勇.根系主要成分含量对根系固土效能的影响[J].水土保持通报,2014(3):166-170.
作者姓名:朱锦奇  王云琦  王玉杰  张会兰  白雪琪  李云鹏  刘勇
作者单位:北京林业大学水土保持学院, 北京 100083;北京林业大学水土保持学院, 北京 100083;北京林业大学水土保持学院, 北京 100083;北京林业大学水土保持学院, 北京 100083;北京林业大学水土保持学院, 北京 100083;北京林业大学水土保持学院, 北京 100083;北京林业大学水土保持学院, 北京 100083
基金项目:北京市教委科学研究与研究生培养共建项目"北京山区生态风险监测与评估技术研究"
摘    要:选取中国北方两种常见树种油松(Pinus tabulaeformis)和元宝枫(Acer truncatum),对这两种树0.2~6mm直径的根系直径、根系抗拉强度、整根的根土复合体强度、根系3种主要成分含量(纤维素含量、半纤维素含量与木质素含量)进行测定。结果表明,随着根系直径的增加,植物根系半纤维素含量增高,纤维素含量与木质素含量降低,从而植物的抗拉强度降低。植物根系抗拉强度与纤维素含量、木质素含量成正相关关系,与半纤维素含量成负相关关系。因此,在排除根系结构影响的前提下,植物根系纤维素含量与木质素含量是导致不同植物种固土效果差异的直接原因。

关 键 词:植物根系  抗拉强度  纤维素  木质素  固土效果
收稿时间:2013/7/23 0:00:00
修稿时间:2013/7/29 0:00:00

Effect of Root Main Component Content on Its Soil-binding Capacity
ZHU Jin-qi,WANG Yun-qi,WANG Yu-jie,ZHANG Hui-lan,BAI Xue-qi,LI Yun-peng and LIU Yong.Effect of Root Main Component Content on Its Soil-binding Capacity[J].Bulletin of Soil and Water Conservation,2014(3):166-170.
Authors:ZHU Jin-qi  WANG Yun-qi  WANG Yu-jie  ZHANG Hui-lan  BAI Xue-qi  LI Yun-peng and LIU Yong
Institution:School of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China;School of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China;School of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China;School of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China;School of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China;School of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China;School of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China
Abstract:This study selected the two common tree species of Pinus tabulaeformis and Acer truncatum in North China. The objective was to investigate the root system tensile strength, the overall root strength of root-soil composite and three root principal component contents (cellulose content, hemicellulose content and lignin content) of the two tree species for root diameters from 0.2 to 6 mm. The results showed that with the increasing root diameter, plant roots got a higher hemicellulose content and cellulose content and a lower lignin content, followed by decreased root tensile strength. Plant root tensile strength had positive correlations with cellulose content and lignin content and, negative correlation with hemicellulose content. Therefore, beyond the root structure influence, the cellulose content and lignin content of plant roots are the direct causes of differences between the soil-binding capacity.
Keywords:root system  tensile strength  cellulose  lignin  soil-binding capacity
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