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用压力膜法对黄泛平原不同质地潮土的持水特性进行了研究。结果指出,土壤的持水性、孔径分布和水容量都与土壤质地有密切关系。在高吸力情况下,土壤的持水性随土壤质地变粘而增强。土壤孔径分布与土壤质地的关系是:重力水孔隙随土壤质地变粘而减小;迟效水孔隙和无效水孔隙随质地变粘而增加;而易效水孔隙偏粘的土壤有减小的趋势。土壤水容量也受土壤质地的影响,重力水水容量随质地变粘而增加,易效水水容量是壤土高于砂性土和粘性大,而迟效水水容量则是轻粘土高于其它质地的土壤。
The water holding capacity of alluvial soil with different texture in the Yellow River flood plain was studied by pressure membrane method. The results show that soil water retention, pore size distribution and water capacity are closely related to soil texture. Under high suction conditions, the soil’s water holding capacity increases as the soil texture becomes viscous. The correlation between soil pore size distribution and soil texture is as follows: the porosity of gravity water decreases with the change of soil texture; the pore of delayed water and void of ineffective water increase with the change of soil viscosity; trend. Soil water capacity is also affected by the soil texture. Gravity water and water capacity increases with the viscosity of the soil. Ease water capacity is higher than that of sandy soil and sticky, while that of late water is lighter clay than the other Texture of the soil.