Influence of Soil Texture on the Thermal Diffusivity

The study of soil thermal property is an important method for analyzing the surface energy balance,and soil thermal diffusivity is a key parameter which characterizes soil thermal property.Thermal diffusivities of soils of different texture were calculated according to different solutions of heat flow equation in non-steady condition.The results indicated that thermal diffusivities of air-dried soils were less than 1.4×10-3 cm2·s-1 and decreased with time.Better soil nutrient and lighter soil texture result in poorer heat transfer.