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 > 4种不同植被群落类型表土的抗蚀力学特性 水土保持通报 2019 (3) 1-6
Position: Home > Articles > 4种不同植被群落类型表土的抗蚀力学特性 Bulletin of Soil and Water Conservation 2019 (3) 1-6

4种不同植被群落类型表土的抗蚀力学特性

作  者：
格日乐;郝需婷;苏日娜;孙保平;黄静;崔天民
单  位：
内蒙古农业大学沙漠治理学院
关键词：
表土;抗剪强度;黏聚力;内摩擦角;土壤含水率
摘  要：
[目的]研究黄土高原农林业生产表层土壤水土流失,为该区域及其相似地区生态修复中树种选择及配置提供科学依据.[方法]以杨树+柠条乔灌混交林、杨树纯林、油松常绿针叶林和柠条灌木纯林下4种不同植被群落类型下表土为对象,进行抗剪力学特性研究,并分析土壤含水率对其力学特性的影响力.[结果]在测试表土含水率2.5%~12.5%范围内,4种不同植被类型及裸地对照样地土壤结皮抗剪强度和黏聚力均随着土壤含水率的增加呈增大的趋势,表明在一定范围内表土湿润程度的增加对提高土壤表层抗蚀能力起到积极作用;4种不同植被群落类型表土抗剪强度和黏聚力的值均显著大于裸地的值,说明水土保持的林草措施对表层土壤结构的改善起到了促进作用,从而提高了表层土壤的抗侵蚀能力;在测试含水率2.5%~12.5%范围内随着含水率的增加各样地表土内摩擦角无明显的变化规律.[结论] 4种不同植被群落类型中柠条+杨树混交林下表土抗剪强度、黏聚力总体表现最大,这也从另外一方面说明了水土保持的林草措施中营造混交林的优越性.
作  者：
Ge Rile;Hao Xuting;Su Rina;Sun Baoping;Huang Jing;Cui Tianmin;College of Desert Control Science and Engineering, Inner Mongolia Agricultural University;School of Soil and Water Conservation, Beijing Forestry University;
关键词：
topsoil;;shear strength;;cohesion;;internal friction angle;;soil moisture
摘  要：
[Objective] The soil erosion of topsoil in agricultural forestry production in Loess Plateau was researched in order to provide scientific basis for the selection and allocation of tree species in ecological restoration in this area and its similar areas. [Methods] The shear mechanical properties of topsoil under four different vegetation community types including poplar + Caragana korshinskii mixed forest, poplar pure forest, Pinus tabulaeformis evergreen coniferous forest and C. korshinskii shrub pure forest were studied, and the influence of soil moisture content on its mechanical properties was analyzed. [Results] In the range of 2.5%～12.5% of the water content of the test topsoil, the shear strength and adhesion of the surface soil were increased with the increase of soil moisture content in 4 different vegetation types and bare ground, indicating that the increase of soil moisture played a positive role in improving the anti-erodibility of soil surface in a certain range. The shear strength and adhesion values of topsoil under 4 different vegetation community types were significantly larger than those of bare land, which indicated that the soil and water conservation measures had improved surface soil structure, thus improving the anti-erodibility of the surface soil. There was no significant change in friction angle of surface soil with the increase of water content in the range of 2.5%～12.5%. [Conclusion] The shear strength and cohesion of the topsoil under the mixed forest of lime + poplar were the greatest among the four different vegetation community types, which also explained the superiority of mixed forest in forest and grass measures of soil and water conservation.

相似文章

导出引用
计量
文章访问数: 4
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