The mixed soil made from the peat and clay with a certain amount of density according to different proportion was loaded into cent ral knife. Then soil moisture content was measured and analyzed and the water ch aracteristic curve was imitated with Van Gennuchten mathematical model under dif ferent suction using high-speed centrifuges and atmospheric balance mensurate, so as to analyze the difference of water-holding capacity of the mixed soil wit h various ratios of peat and clay. The results show that: ①If the ratio of peat and clay (less than 1 mm) is 3∶1, the water-holding capacity is stronger than other ratio. ②If the ratio of peat and clay (3～5 mm) is 3∶1 and 4∶1, the wat er-holding capacity is better.%泥炭和粘土不同比例配合土按同一容重装填到环刀中,采用高速离心机法和大气平衡法测定配合土的不同吸力下土壤的含水量,并利用Van Ge nnuchten数学模型对水分特征曲线进行拟合,进而来分析泥炭与粘土配合土的持水能力.研究结果表明:①泥炭和粘土(＜1 mm)比例为3∶1时的持水能力较强,优于其它配比 .②泥炭和粘土(3～5 mm)比例为3∶1和4∶1时的持水性较好.
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