中国农业科学院农业信息研究所 中国农学会
Agricultural Information Institute of CAAS China Association of Agricultural Science Societies
En
Ch
中国农业科学院农业信息研究所 中国农学会 主办

AI检索

订阅

返回顶部
当前位置: 首页 > 文章 > 石漠化区多花木蓝和双荚决明根土复合体抗剪特性研究 西南林业大学学报(自然科学) 2019 (4) 18-23
Position: Home > Articles > 石漠化区多花木蓝和双荚决明根土复合体抗剪特性研究 Journal of Southwest Forestry University(Natural Sciences) 2019 (4) 18-23

石漠化区多花木蓝和双荚决明根土复合体抗剪特性研究

作  者：
张乔艳;唐丽霞;潘露;黄同丽;陈龙
单  位：
贵州大学林学院
关键词：
石漠化区;多花木蓝;双荚决明;根土复合体;抗剪特性
摘  要：
石漠化地区土壤易流失,植被恢复难度大.选取贵州石漠化区有代表性的灌木树种多花木蓝和双荚决明为研究对象,采用四联直剪仪对多花木蓝和双荚决明根-石灰土重塑试样进行直剪试验,主要分析了根径、法向压力和含水率对根土复合体抗剪特性的影响.结果表明:植物根系的存在对土体抗剪强度有积极作用,主要以加筋的形式增强土体的抗剪强度,以根径2~3 mm对石漠化地区固坡护坡效果较好.法向压力对复合体抗剪特性的影响最显著,因其影响复合体的密实性来间接影响抗剪强度,表现为法向压力越大,土体密实性越好,根土复合体抗剪强度越大.根土复合体的抗剪强度随含水率的增加呈先增加后减小的趋势,在含水率14.3%时,根土复合体抗剪强度最大,固土效果最佳.2种植物中,多花木蓝总体上较双荚决明更能增强土体抗剪强度.本研究可为石漠化地区边坡绿化和水土保持树种的筛选及根径大小的控制提供参考.
作  者：
Zhang Qiaoyan;Tang Lixia;Pan Lu;Huang Tongli;Chen Long;College of Forestry,Guizhou University;
单  位：
Zhang Qiaoyan%Tang Lixia%Pan Lu%Huang Tongli%Chen Long%College of Forestry,Guizhou University
关键词：
rocky desertification region;;Indigofera amblyantha;;Cassia bicapsularis;;root-soil composite;;shearing characteristics
摘  要：
Soil is easily lost in rocky desertification areas, and vegetation restoration is difficult. Selecting representative shrub species, Indigofera amblyanthy and Cassia bicapsularis, in the rocky desertification area of Guizhou as research object. Direct shear test on I. amblyanthy and C. bicapsularis root-lime soil remolded specimens using a quadruple direct shear. The effects of root diameter, normal pressure and water content on the shear properties of root-soil composites were analyzed. Results show that the existence of plant roots has a positive effect on the shear strength of the soil. The shear strength of the soil is mainly strengthened in the form of reinforcement. The effect of slope protection is 2-3 mm on the slope protection in rocky desertification areas. The normal pressure has the most significant effect on the shear properties of the composite. It affects the shear strength indirectly due to its influence on the compactness of the composite. The greater the normal pressure, the better the soil compaction and the shear resistance of the root-soil composite. The shear strength of the root-soil composite increases first and then decreases with the increase of water content. At the moisture content of 14.3%, the root-soil composite has the highest shear strength and the best soil-fixing effect. Among the 2 plants, I. amblyanthy is more able to enhance the shear strength of the soil than C. bicapsularis. This study can provide reference for the screening of slope greening and soil and water conservation tree species and the control of root diameter in rocky desertification areas.

相似文章

导出引用
计量
文章访问数: 16
HTML全文浏览量: 0
PDF下载量: 0

所属期刊

推荐期刊

友情链接Friendly link
农业信息研究所Agricultural information institute 农业智能知识服务平台Agricultural intelligent knowledge service platform 农业学术服务平台Agricultural Knowledge Service System 中国知网CNKI 维普网VIP 万方WANFANG DATA
联系我们Contact us

电话Tell：010-82109652-808

邮箱E-mail：agrijournal@caas.cn

服务Service
关于我们About us 意见建议Opinions and suggest
版权说明Copyright
单位：中国农业科学院农业信息研究所 中国农学会 © 2017中国农业科学院农业信息研究所 ICP备案号：京ICP备09089781号-46