FIELD: agriculture.
SUBSTANCE: invention relates to the field of crop production in an enclosed ground, namely to means of heating, moistening the soil and cooling the air in greenhouses. The duct system contains an air intake located in the upper part of the greenhouse, air distribution units connected to above-ground air ducts communicating with perforated soil air ducts with outlet pipes, and an air pumping device. The air intake is made in the form of an air duct located along the entire length of the greenhouse with perforations, and air distribution units are located on its opposite sides. Each soil duct consists of two separate parts, the inputs of which communicate with the above-ground ducts, and the outlets with outlet pipes are located in the middle part of the greenhouse. The device for pumping air in the greenhouse is made in the form of exhaust fans, which are installed on the outlet pipes and equipped with devices for forming horizontal fan jets.
EFFECT: increase in the efficiency of using solar energy to increase plant yields.
5 cl, 3 dwg
