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应用能量观点研究非饱和土壤水分运动,测定土壤水分特征曲线不仅是研究土壤物理性质的重要环节,也是间接测定参数容水度C(θ)的重要方法。经5年试验:(一)不同质地土壤水分特征曲线不同,曲线坡度也不一样。粘土大于砂壤土;(二)在低吸力条件下,干容重愈大,曲线愈靠近座标轴右边;(三)土壤干湿过程不同,水分特征曲线也不同,测定水分特征曲线在生产上有实用价值。
Studying the movement of unsaturated soil water from the perspective of energy and determining the soil water characteristic curve are not only the important links to study the physical properties of soil, but also an important method for indirect determination of water content C (θ). After 5 years of testing: (a) different soil moisture characteristics of different curves, the curve is not the same slope. Clay is larger than sandy loam soil; (2) Under low suction conditions, the dry bulk density is larger and the curve is closer to the right of the coordinate axis; (3) The process of soil wetting and drying is different and the water characteristic curve is also different. Practical value.