内蒙古东北林草交错生态脆弱区的公路边坡生态袋防护效益研究

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中图分类号：S732 文献标志码：A 文章编号：1008-0864（2025）11-0195-10

Abstract：The excavationof highway projects causes a large area of exposed rocky slopes which is the maincause of soil erosion.In order to explore therole played by eco-bags in ecological protection of highwayslopes，the highway slopes intheecologicalyfragileareaofforestand grass interspersedinNortheastInner Mongoliawereselectedasthe research object，and a combination offield investigationand indoor experiment wasadopted toanalyse the soil， vegetationindexandrootcharacteristicsof theeco-bags.Theresults showed thattheeffectofslopedirectiononsoil physicochemical properties （except for bulk densityand total nitrogen content）were negative>positive>control slopes，in which the total potassium content of the negative slopes varied most significantly，which was 18% and （204号 26% higher than that of the positive slopes and control slopes，respectively；the slope direction was negative> positive>control slopes intermsof the height，coverand biomassof the plant plants，andthe totallengthof theroot system of the negative slope was 30% and 38% higher than that of the positive slope and control slope，respectively. The principal component analysis showed that the composite scores of shady slope，sunny slope and control slope reached 46.16，-13.00 and -33.15 ，respectively. Comparison between the original exposed rocky slope and the slope protected byeco-bagsrevealed that thesoil nutrientsand vegetation growth of slopes protectedbyeco-bags were better，while theecological environmentof theoriginal ecological slopes wasmore fragile，and theecological protection of exposed rockyslopes in the fragile areas should be strengthened.The ecological environment of the original slopes is more fragile.Theresultsprovidedatheoretical basis forfurther investigationoftheimpact of ecological bags on highway slopes.

Keywords：highway slope;slope direction; ecological bag；principal component analysis

公路作为现代交通的重要组成部分，其边坡的稳定性与生态保护至关重要。（剩余15957字）