Study on the Field Moisture Movement Numerical Simulation for Winter Wheat and the Irrigation Model under Sprinkler Irrigation Condition

To investigate water-saving sprinkler model,both numerical simulation and field experiment methods are used to study the field moisture movement of winter wheat under sprinkler irrigation.Compared of the soil moisture between numerical simulation and the field experiment data,the results are satisfactory and indicate that the numerical model is reliable.Based on the model,the transpiration,surface evaporation and deep percolation under different sprinkler irrigation yuota are simulated.The results show that the surface evaporation and deep percolation under 40-60mm sprinkler irrigation yuota is minimal.Thus,the reasonable sprinkler irrigation model for winter wheat is proposed.Relative to the present sprinkler irrigation farmer's usage water use of the suggested model is reduced by 45%.