As the steel structure greenhouse continues to rise, the air conversion and ventilation time should increase during the wind. When the greenhouse is not well controlled, the ventilation holes in front of the greenhouse are opened, and appropriate shading and cooling measures are taken to achieve normal crop growth.
The steel structure greenhouse can choose the following methods according to the actual situation to achieve the purpose of regulating the greenhouse environment, which is conducive to the growth of vegetables:
1. use plastic film to clean the apron film. This method uses the top membrane to cover the rainwater, ventilation and penetration of water in a lower position.
2. the top membrane is still fixed with a plastic membrane and cleaned the insecticide net with the apron membrane cover. This method can reduce the harm of pests to greenhouse vegetables, but the greenhouse has poor ventilation and humidity, and it is prone to high temperature or high humidity. First
3.On the basis of retaining the plastic top film, clean up the skirt and cover the shading mesh. This method is often used in summer vegetable production and seedlings.
