Yucheng is a typical city in the North China plain, which is one of the most important growing districts of grain. Research on it will benefit to the agriculture of the whole region. Furthermore, energy balance is the basis for simulating heat and water transfer in crop canopy. Temperature reflects the condition of plant objectively. Meteorological factors such as air temperature, humidity and wind speed as well as soil temperature are the ambient conditions that affect the activity of plants. Canopy temper...