An automatic topdressing system was designed on the base of the principle of hydrokine tics using energy of static pressure for pipe irrigation and the feature of Venturi Pipe in solar greenhouse.

• 依据流体动力学原理，利用日光温室管网灌溉的静压能和文丘里管的特性，设计出在日光温室正常灌溉情况下的自动施肥系统。