Temperature Regimes Effected by Different Soil Moisture in Soil Mulched with Transparent Polyethylene

In order to study the effect of soil mulching with transparent polyethylene film upon the soil temperature regimes with variou soil water content a numerical one dimensional model has been developed.Optical properties of the cover was considered and the effect of soil water movement on soil temperature distribution was ignored.The ability of the model to predict the temperature regimes of the mulched soil under different soil water content was tested.The calculated results agree well with the observed data.It was shown that the temperature regimes are significantly influneced by the polyethylene film.The model is used to calculate the soil heating by the transparent polyethylene film mulched in the area which inputs the data of meteorology information.