中国水土保持科学2024，Vol.22Issue(3)：56-63,8.DOI:10.16843/j.sswc.2023057
水陆交错带护坡植物固土抗蚀能力比较分析
Comparative analysis of soil reinforcement and anti-erosion capacity of slope protection plants in land-water ecotone
摘要
Abstract
[Background]Ecological revetment is one of the protection technologies widely used in the stability of river banks,lakeshore,reservoir banks and water-level-fluctuating zones.The harsh land-water ecotone environment makes it challenging to choose appropriate plants for the purpose of ecological slope protection.The soil reinforcement capacity of plants is a key factor of ecological revetment technology.Quantitative assessment and comparison of the soil reinforcement capacity of wetland plants can provide a theoretical basis for ecological slope protection in land-water ecotone.[Methods]In this study,Arundo donax,Phragmites australis and Cyperus alternifolius,which are drought and waterlogging resistance and have well-developed root system,were selected as the material in this research.Soil anti-shearing strength and anti-scourability were determined by in-situ shear test and anti-scour tests,enabling us to compare and analyze the soil reinforcement capacity of the plants and the influencing factors.[Results]1)The results showed that A.donax,P.communis,and C.alternifolius significantly improved theanti-shearing strengthandanti-scourability,the anti-shearing strength of the three plants increased by 111.80％,77.43％and 99.17％respectively,and the anti-scourability increased by 299.40％,140.21％and 183.79％respectively.2)The proportion of stem cross-sectional area,root biomass,root density and root number per unit branch number of A.donax were significantly higher than those of P.communis and C.alternifolius.3)The analysis showed that the average diameter,total volume and total number of plant roots were positively correlated with the anti-shearing strength of soil.And the root biomass,root density,number of roots per unit branch and proportion of stem cross-sectional area in the quadrat were positively correlated with the anti-scourability of soil.[Conclusions]This study demonstrates that suitable plants can significantly improve the erosion resistance of soil in land-water ecotone regions.A.donax shows the strongest effects on soil reinforcement and has strong drought and waterlogging resistance,making it an ideal candidate for ecological revetment in land-water ecotone regions.关键词
生态护坡/湿地植物/抗剪强度/抗冲性/固土能力Key words
ecological slope protection/wetland aquatic plants/anti-shearing strength/anti-scourability/soil reinforcement capacity分类
农业科学引用本文复制引用
程虎,李蒙,杨劭,张乃畅,李厚峰..水陆交错带护坡植物固土抗蚀能力比较分析[J].中国水土保持科学,2024,22(3):56-63,8.基金项目
陕西省自然科学基础研究计划项目"引汉济渭二期工程湿地生态保护工程关键技术研究"(2021JLM-56) （2021JLM-56）
国家科技重大专项水体污染控制与治理项目"三峡库区小江汉丰湖流域水环境综合防治与示范"(2013ZX07104-004) （2013ZX07104-004）
