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护岸金丝柳根系分布特征和力学特性分析

郭凯力 高甲荣 马岚 刘国华 王兵 易扬 王舒 张腾飞

郭凯力, 高甲荣, 马岚, 刘国华, 王兵, 易扬, 王舒, 张腾飞. 护岸金丝柳根系分布特征和力学特性分析[J]. 北京林业大学学报, 2015, 37(8): 90-96. doi: 10.13332/j.1000-1522.20150022
引用本文: 郭凯力, 高甲荣, 马岚, 刘国华, 王兵, 易扬, 王舒, 张腾飞. 护岸金丝柳根系分布特征和力学特性分析[J]. 北京林业大学学报, 2015, 37(8): 90-96. doi: 10.13332/j.1000-1522.20150022
GUO Kai-li, GAO Jia-rong, MA Lan, LIU Guo-hua, WANG Bing, YI Yang, WANG Shu, ZHANG Teng-fei. Distribution and tensile mechanical properties of Salix × aureo-pendula root system in soil bioengineering revetment[J]. Journal of Beijing Forestry University, 2015, 37(8): 90-96. doi: 10.13332/j.1000-1522.20150022
Citation: GUO Kai-li, GAO Jia-rong, MA Lan, LIU Guo-hua, WANG Bing, YI Yang, WANG Shu, ZHANG Teng-fei. Distribution and tensile mechanical properties of Salix × aureo-pendula root system in soil bioengineering revetment[J]. Journal of Beijing Forestry University, 2015, 37(8): 90-96. doi: 10.13332/j.1000-1522.20150022

护岸金丝柳根系分布特征和力学特性分析

doi: 10.13332/j.1000-1522.20150022
基金项目: 

北京市科技服务业专项(Z151100001115001)

详细信息
    作者简介:

    郭凯力。主要研究方向:水土保持与流域管理。 Email:gxd214314@163.com 地址:100083 北京市清华东路35号北京林业大学水土保持学院。

    责任作者:

    高甲荣,教授,博士生导师。主要研究方向:流域管理及水环境建设。

Distribution and tensile mechanical properties of Salix × aureo-pendula root system in soil bioengineering revetment

  • 摘要: 了解不同土壤生物工程措施下根系分布特征与抗拉特性对土壤生物工程措施的合理配置意义重大。以竣工5年的北京市怀柔区土壤生物工程试验区4种不同种植方式(埋根、扦插、梢捆、灌丛垫)下的金丝柳根系为研究对象,测量统计不同土层深度、不同径级的根系生物量并进行单根拉伸试验,分析在不同种植方式下金丝柳根系的生物量分布特征和单根抗拉特性,结果表明:灌丛垫和梢捆措施根系主要分布在0~40cm深度的土层中,在0~20cm土层中尤为集中。灌丛垫方式下根径≤1mm的细根含量丰富(占其总量的31.3%),须根系最为发达,梢捆次之,细根含量占其总量的19.2%。不同种植方式下根系抗拉力与直径都呈正相关,且以幂函数的规律变化。在0~20cm的土层中,不同种植方式下根系的抗拉特性存在较大差异,平均抗拉力从大到小依次为埋根、扦插、梢捆、灌丛垫;而平均延伸率从大到小依次为灌丛垫、梢捆、扦插、埋根。所以,灌丛垫和梢捆方式下根系浅层生物量较大,须根发达且具有更好的延伸性能,可有效减轻表土侵蚀,应设置在水位浮动区;埋根和扦插措施下根系能抵抗更大的剪切力,更好地深入土层深处,可设置在岸堤区。

     

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出版历程
  • 收稿日期:  2015-01-21
  • 修回日期:  2015-01-21
  • 刊出日期:  2015-08-31

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