目的 研究荒漠草原区出现灌丛化现象后，灌丛沙堆在退化生态系统中发挥的保育功能和防风固沙作用。 方法 该研究以浑善达克沙地3种典型荒漠草原灌丛长柄扁桃(Amygdalus pedunculata)、小叶锦鸡儿(Caragana microphylla)和狭叶锦鸡儿(Caragana stenophylla)为研究对象，通过测定分析3种灌丛形态参数、沙堆形态参数和灌丛下土壤颗粒分形维数，探讨其沙堆形态发育和土壤颗粒组成特征，以及与植物灌丛形态特性和固沙能力的关系。 结果 表明：3种典型灌丛沙堆均为圆锥状，其沙堆高度随沙堆半径的增加呈对数曲线增加，即在沙堆形态较小时，随着沙堆半径的增大，沙堆高度增加较快，而随着沙堆底面积不断增大，沙堆高度变化就会趋于稳定且增加速度降低，整个沙堆在水平方向的延伸速度大于垂直方向；沙堆形态参数之间以及与灌丛形态参数间表现出显著相关性，随着灌丛地上生物量的增加，沙堆高度、半径、底面积和体积均呈显著增加(P<0.05)，3种灌丛沙堆体积和固沙率差异性显著(P<0.05)，表现为：小叶锦鸡儿>狭叶锦鸡儿>长柄扁桃；灌丛使降尘等细粒物质拦截或聚集在灌丛下，土壤颗粒分形维数与粒径(<0.1 mm)颗粒含量呈显著的线性正相关关系；不同物种灌丛下土壤分形维数差异性显著(P<0.05)，表现为：小叶锦鸡儿(2.346)>狭叶锦鸡儿(2.259)>长柄扁桃(2.149)>裸沙地(2.057)。 结论 灌丛越大，沙堆体积越大，灌丛下沉积细物质越多，土壤分形维数越大，植物固沙能力越强。

The soil environment quality of woodland with different parentmaterials( limestone, dolomite limestone, limestoneshale, dolomite, limestone sand inclusion shale) in Kasta mountain area was assessed with Analytic Hierarchy Process andPrincipal Component Analysis methods. The results indicated that the soil fertility quality of the soil developed from limestone shale was the best, and the soil developed from dolomite limestone was the worst. The soil developed from limestoneshale showed the best heavy metals quality, and the soil developed from dolomite was the worst. The soil developed fromlimestone shale had the best stand condition quality, and the soil developed from limestone sand inclusion shale was theworst. The results also showed that the order of the soil environment quality was: limestone shale > limestone > dolomitelimestone > dolomite > limestone sand inclusion shale.