草业学报2026，Vol.35Issue(3)：52-67,16.DOI:10.11686/cyxb2025187
土壤水力性质对高寒沼泽草甸退化与建植人工草地的响应
Response of soil hydraulic properties to alpine swamp meadow degradation and sown grassland planting
摘要
Abstract
In this research,natural,lightly degraded and heavily degraded marsh meadows,and artificially established sown grassland(established in 2018 by planting Poa crymophila on degraded meadows for ecological restoration)in Maqin County,Qinghai Province,were studied.Several key soil properties were measured,and the changes in soil hydraulic properties within the 0-30 cm soil layer,and factors driving the changes were analyzed.The results demonstrated that:1)Biomass,soil porosity,organic carbon content,and total nitrogen content exhibited a trend of initial decrease and then increase with the degradation of alpine marsh meadows and the establishment of artificial sown grassland(P<0.05).2)In the 0-20 cm soil layer,the ranking of soil water holding capacity,field capacity,wilting coefficient,and saturated water content was as follows:natural marsh meadow>artificially established sown grassland>heavily degraded marsh meadow.Saturated hydraulic conductivity in the 0-10 cm soil layer was significantly higher than that in the 10-30 cm soil horizon and decreased significantly with the degradation of alpine marsh meadows while increasing significantly with the establishment of artificially sown grassland(P<0.05).3)Saturated hydraulic conductivity,saturated water content,and plant-available water content were significantly positively correlated with soil porosity,organic carbon content,and total nitrogen content(P<0.05),and significantly negatively correlated with soil pH(P<0.05).Partial least squares regression analysis revealed that the critical factors influencing soil hydraulic properties were soil porosity and organic carbon content.In conclusion,the degradation of alpine marsh meadows and the establishment of artificially sown grassland significantly altered soil hydraulic properties,with the most pronounced impact observed in the surface horizon(0-10 cm).The data indicate that surface soils are the most sensitive to degradation-induced changes;this is an important insight for managing the ecological restoration of alpine marsh meadows.关键词
高寒沼泽草甸/退化/人工草地/土壤持水能力/饱和导水率Key words
alpine marsh meadow/degradation/artificial grassland/soil water holding capacity/saturated hydraulic conductivity引用本文复制引用
李向,李航,李润杰,张永坤..土壤水力性质对高寒沼泽草甸退化与建植人工草地的响应[J].草业学报,2026,35(3):52-67,16.基金项目
国家自然科学基金(42207375)和青海省科技计划(2024-SF-148)项目资助. （42207375）
