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| 护坡植物根系力学特性与其解剖结构关系 | |
| 引用本文： | 朱海丽,胡夏嵩,毛小青,李国荣,张兴玲,陈桂琛.护坡植物根系力学特性与其解剖结构关系[J].农业工程学报,2009,25(5):40-46. |
| 作者姓名： | 朱海丽 胡夏嵩 毛小青 李国荣 张兴玲 陈桂琛 |
| 作者单位： | 1. 青海大学地质工程系,西宁,810016 2. 青海大学地质工程系,西宁,810016;中国科学院西北高原生物研究所,西宁,810007 3. 青海大学水电系,西宁,810016 4. 中国科学院西北高原生物研究所,西宁,810007 |
| 基金项目： | 国家自然科学基金，中国博士后科学基金，教育部新世纪优秀人才支持计划，青海省重点科技攻关项目 |
| 摘 要： | 为研究植物单根力学特性与其解剖结构的关系,以西宁盆地为例,对青藏高原东北部黄土区5种灌木单根抗拉特性、抗剪特性、根系解剖结构进行了一系列试验研究.结果表明:根系解剖结构中韧皮纤维、木纤维的百分含量、周皮的木质化程度及根系的木质化速度等因素影响根系力学强度,根系拉伸延长率与根系韧皮纤维含量成正比,与木纤维含量成反比;5种灌木植物中,柠条锦鸡儿单根横切面上次生韧皮部平均面积比最大,达到45%,表现为单根具有较大延伸率;四翅滨藜单根横切面上次生木质部平均面积比最大,达到50%,表现为单根具有较强的抗拉和抗剪强度.根据5种供试灌木根系力学特性及其解剖结构特征,四翅滨藜和柠条锦鸡儿根系固土护坡作用较大. |
| 关 键 词： | 抗拉强度 抗剪强度 力学特性 韧皮纤维 木纤维 |
| 收稿时间： | 4/3/2008 12:00:00 AM |
| 修稿时间： | 2009/3/18 0:00:00 |
Relationship between mechanical characteristics and anatomical structures of slope protection plant root |
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| Zhu Haili,Hu Xiasong,Mao Xiaoqing,Li Guorong,Zhang Xingling and Chen Guicheng.Relationship between mechanical characteristics and anatomical structures of slope protection plant root[J].Transactions of the Chinese Society of Agricultural Engineering,2009,25(5):40-46. | |
| Authors: | Zhu Haili Hu Xiasong Mao Xiaoqing Li Guorong Zhang Xingling and Chen Guicheng |
| Institution: | 1.Qinghai University of Geological Engineering Department;Qinghai 810016;China;2.Northwest Plateau Institute of Biology;the Chinese Academy of Sciences;Qinghai 810007;3.Qinghai University of Hydraulic and Electric Power Engineering Department;China |
| Abstract: | Taking Xining basin as example,the single root tensile tests,shear tests and roots anatomical tests of five species of shrub were carried out to study the relationship between mechanical characteristics of shrub roots and roots anatomical structures in the loess area of northeast Qinghai-Tibet plateau.The results showed that the main factors affected tensile and shear strength of single root including the percentage of phloem fibers and wood fibers,the degree and speed of periderm lignification.The shrubs s... |
| Keywords: | tensile strength shear strength mechanical characteristics phloem fibers wood fibers |
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