Study and Application of Negative Pressure Water Supplying,Controlling Pot Device and Irrigation System

How to control soil moisture continued and precisely has been the focus of the research at home and abroad,part of the soil will be reach saturation under current water controlling methods,and the result of the experiment will not be so imprecise.Based on the principle of negative pressure,the negative pressure water supplying,controlling pot device and negative pressure irrigation system de- signed for solve this problem,the experiment result showed that the negative pressure water supplying,controlling pot device can maintain soil moisture of pot equipment in the enactment state,it has the function of sustained,stably controlling soil moisture and reading the val- ue of evapotranspiration,with a balance we can obtain the value of plant fresh weight growth;negative pressure irrigation can leading the soil moist to a Non-saturation status,restrain the surface soil invalid evaporation and nutrient loss caused by underground water leakage, and also will not damage the soil structure,saving a lot of manpower,resources,and improve water use efficiency,increasing the potential of increasing of crop yields,the negative pressure water supplying,controlling pot device and negative pressure irrigation system have a great generally value in the plant facilities cultivation and scientific research.