Effect of Plastic Film Colours and Perforations on Energy Distribution, Soil Temperature, and Evaporation

Plastic film mulching is a commonly used agricultural measure in arid/cold regions to improve crop growth. Despite previous studies on the impact of soil water/heat status and growth, it not clear how plastic colours perforations affect energy distribution, temperature, evaporation. Six sets column experiments were performed with three colours: transparent (T), black (B), silver-grey (G), two perforation ratios: 4.49% 21.44%, monitor evaporation soil/film temperature. Using these main control factors, soil–mulch–atmosphere system (SMAS) model was established simulate distribution. The simulations compared well measurements. available net positively related ratio transmittance film, which further influenced temperature altered Both simulated measured results gave following order for transpiration films: T > B G. SMAS more accurate when mulch weak light covered field. Moreover, by comparing mass loss without considering heat conduction between surface, Csm, we found that feasible exclude Csm. However, Csm indispensable understanding mechanism agroecosystems, particularly at night.