【摘要】 为探究干旱荒漠区人工固沙植被恢复过程对土壤特征的影响，以黑河中游张掖绿洲为研究区，选择流动、固定沙丘和不同栽植年限梭梭（Haloxylon ammodendron）林作为研究对象，分析土壤理化性质和植被因子特征及二者间的相关性。结果表明：（1）流动和固定沙丘转变为人工梭梭林降低了土壤容重和细砂含量，提高了土壤粗砂含量，土壤黏粉粒含量在30年梭梭林大幅增加；（2）流动和固定沙丘转变为人工梭梭林降低了土壤pH，提高了土壤电导率并随着梭梭栽植年限的增加而增大；（3）流动和固定沙丘转变为人工梭梭林提高了土壤有机碳、全氮、全磷含量及电导率，并随着梭梭栽植年限的增加而增大；（4）灌木密度和盖度及草本物种丰富度是驱动人工梭梭林恢复过程中土壤环境变化的主要因子，三者解释了40.1%的土壤环境变异。综上，人工梭梭林建设引起的灌木盖度及密度增加会改善土壤环境并随着恢复年限的变化而变化，但也会导致土壤电导率增加和全氮含量下降，从而威胁人工梭梭林土壤健康与稳定。更多还原

【Abstract】 To investigate the impact of artificial sand-fixing vegetation restoration on soil characteristics in arid desert regions, this study was conducted in the Zhangye Oasis of the middle reaches of the Heihe River. The research focused on mobile sandy dunes, fixed sandy dunes, and Haloxylon ammodendron plantations of different ages, analyzing changes in soil physicochemical properties, vegetation factors, and their interrelationships. The results revealed that:(1) The transformation of mobile and fixed sandy dunes into artificial H. ammodendron plantations reduced soil bulk density and fine sand content, increased coarse sand content, and significantly enhanced clay and silt content in 30-year-old plantations.(2) The conversion of mobile and fixed sandy dunes into H. ammodendron plantations decreased soil pH, increased soil electrical conductivity, and further elevated conductivity with the age of the plantations.(3) The conversion of mobile sandy dunes and fixed sandy dunes into H. ammodendron plantations significantly increased soil organic carbon(SOC), total nitrogen(TN), and total phosphorus(TP) contents, as well as soil electrical conductivity, with these increments generally correlating with the extension of H. ammodendron plantations age.(4) Shrub density, shrub cover, and herbaceous species richness were the main factors driving soil environmental changes during the restoration process of H. ammodendron plantations, accounting for 40.1% of the variation in soil conditions. In conclusion, the increase in shrub cover and density resulting from artificial H. ammodendron plantation establishment improves soil environment over time. However, it also leads to elevated soil electrical conductivity and reduced total nitrogen content, posing potential threats to soil stability and health in H. ammodendron plantations.更多还原