Growing vegetables in greenhouses is to provide vegetables with suitable light, temperature, water and fertilizer conditions. Depending on the types of vegetables grown, the management details are also very different, so the requirements for the level of the main technical personnel are relatively strict. Here is the basis The temperature management measures mentioned in the question will be highlighted.

Different crops and different growth periods have different temperature requirements. There are three main temperature points: minimum temperature, maximum temperature and optimal temperature. Crop growth temperature should be controlled between the minimum temperature and the maximum temperature. time, it is best to keep it around the optimal temperature. The approximate suitable range for vegetables is daytime temperature of 20-35 degrees and night temperature of 15-20 degrees. In winter, the main thing is to control the night temperature. The minimum temperature cannot be lower than 10 degrees, otherwise the crops will stop growing and even suffer from frost damage. In summer, the main thing is to control the temperature from 1 pm to 3 pm. It should not be higher than 35 degrees, otherwise the young leaves at the growing point will be burned or sunburn will occur.

Winter insulation measures can start from the following aspects. First, the solar greenhouse construction structure is reasonable, the lighting angle and ridge height ratio are optimized, the thickness of the back wall and the selection of internal insulation materials are appropriate. Second, clean the shed film regularly to increase the light transmittance. Third, choose good quality insulation quilts outside the shed film. Fourth, heating measures such as floor heating and floor heating are added inside the shed. Fifth, around four or five o'clock when the temperature is the lowest, ignite the emergency heating block to increase the temperature by 1 to 2 degrees.

Summer cooling measures mainly include, first, covering the outside of the shed film with a sunshade net. Second, spray shade paint such as Liliang. Third, remove old leaves in time to increase ventilation. Fourth, increase the opening of the top and bottom air vents. Fifth, use sprinkler irrigation to increase humidity and reduce temperature.

Greenhouse production has high economic benefits. In order to make full use of greenhouse facilities, increase the number of crops and increase output. The greenhouse should be built on a site with loose soil, rich in organic matter, strong heat absorption performance, good water permeability, low groundwater level, and good drainage system. Greenhouse production has high economic benefits. In order to make full use of greenhouse facilities, increase the number of crops and increase output. The greenhouse should be built on a site with loose soil, rich in organic matter, strong heat absorption performance, good water permeability, low groundwater level, and good drainage system.