公路边坡不同植被覆盖土壤机械组成及抗蚀性分析  

Analysis on Soil Mechanical Composition and Anti-erodibility under Different Vegetation Covers in Highway Slope

作　　者：张彬[1] 谢贤健[1] 苟千陶 ZHANG Bin;XIE Xian-jian;GOU Qian-tao(School of Geography and Resources Science,Neijiang Normal University,Neijiang,Sichuan 641000)

机构地区：[1]内江师范学院地理与资源科学学院,四川内江641000

出　　处：《安徽农业科学》2022年第20期45-49,80,共6页Journal of Anhui Agricultural Sciences

基　　金：四川省教育厅科研项目(18ZB0320);内江师范学院科研资助项目(17JC03);国家级大学生创新创业项目(X2017019)。

摘　　要：[目的]分析不同植被覆盖对公路边坡土壤机械组成和抗蚀性的影响。[方法]以乔木、乔草、乔灌草和草地模式土壤为研究对象,依据卡钦斯基制土壤粒径分级标准分析土壤机械组成,在单一指标抗蚀性分析的基础上,构建土壤抗蚀性评价指标体系,并基于熵权法计算土壤抗蚀性综合指数,综合评价其抗蚀性差异。[结果]公路边坡不同植被土壤理化性质差异显著,乔草和乔灌草模式能够有效改良土壤理化性质;乔灌草模式土壤颗粒组成排序为砂粒>粗粉粒>中细粉粒>黏粒,乔木、乔草和草地植被模式的土壤颗粒组成排序为砂粒>中细粉粒>粗粉粒>黏粒;不同植被覆盖土壤水稳性团聚体含量的比重排序为乔灌草>草地>乔草>乔木,分形维数排序为乔木>乔草>草地>乔灌草,平均重量直径排序为草地>乔灌草>乔木>乔草,土壤水稳性指数的排序为乔草>乔灌草>草地>乔木,土壤抗蚀性指数排序为乔灌草>乔草>草地>乔木,乔灌草模式土壤抗蚀性指数最大,表明其为公路边坡土壤的最佳护坡植被模式。[结论]研究结果可为改善公路边坡土壤结构、提高其土壤抗蚀性能力提供参考依据。[Objective]To comprehensively analyze the effects of different vegetation coverage patterns on the soil mechanical composition and anti-erodibility of the highway slope.[Method]The soil of arbor,arbor-grasslands,arbor-shrub-grasslands and grasslands were selected as the study objects,the soil mechanical composition was analyzed according to soil particle size classification standard made by Kaczynski.Furthermore,a comprehensive evaluation index system of soil anti-erodibility was established based on the analysis of single index of soil anti-erodibility,and the comprehensive index of soil anti-erodibility was calculated by entropy weight method,comprehensively evaluating the difference of soil anti-erodibility.[Result]There were significant differences in the soil physical and chemical properties of different vegetation on highway slopes,and the arbor-grass and arbor-shrub-grass models could effectively improve the physical and chemical properties of the soil.The order of soil particles composition in the arbor-shrub-grass pattern was sand particles>coarse powder particles>medium and fine powder particles>clay particles,and the order of soil particle composition for vegetation patterns of arbor,arbor-grassland and grasslands was sand particles>medium and fine powder particles>coarse powder particles>clay particles.The order of the proportion of soil water-stable aggregate content under different vegetation covers was arbor-shrub-grasslands>grasslands>arbor-grasslands>arbor,the order of fractal dimension was arbor>arbor-grasslands>grasslands>arbor-shrub-grasslands,the order of average weight diameter was grasslands>arbor-shrub-grasslands>arbor>arbor-grasslands,the order of soil water stability index was arbor-grasslands>arbor-shrub-grasslands>grasslands>arbor,the order of soil anti-erodibility index was arbor-shrub-grasslands>arbors and grass>grassland>arbors.The soil anti-erodibility index of arbor-shrub-grasslands was the largest,which indicated that it was the best slope protection vegetation pattern for highwa

关 键 词：植被覆盖 土壤机械组成 抗蚀性 熵权法 公路边坡 

分 类 号：S157.9[农业科学—土壤学]