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从水动力学角度探讨了苔藓泥炭对高含沙(沙土比7∶3)土壤水分运动的影响。结果表明:随着苔藓泥炭含量增加,土壤饱和含水量、毛管含水量和田间持水量均线性增加;土壤持水曲线逐渐上移,持水性和供水能力明显增加,当吸力增加到0.5×105Pa时,各处理土壤的比水容量均出现10-2数级;原状土饱和导水率随泥炭含量增加呈先增后降的变化趋势,在30 g/kg达到最大值,而压实后的饱和导水率呈逐渐下降趋势。
The effect of moss peat on soil water movement at high sediment content (sandy soil ratio 7: 3) was discussed from the hydrodynamic point of view. The results showed that with the increase of moss peat content, the soil saturated moisture content, capillary water content and field water content increased linearly. The soil water retention curve increased gradually and the water holding capacity and water supply capacity increased significantly. When the suction increased to 0.5 × 105 Pa , The specific water capacity of all treated soils tended to be 10-2. The saturated hydraulic conductivity of undisturbed soil increased first and then decreased with the increase of peat content, reaching the maximum at 30 g / kg, while the saturated Water conductivity showed a gradual downward trend.