How to regulate greenhouse temperature

1. High ridge cultivation, mulching. High ridge cultivation in greenhouses and greenhouses can increase the surface area of ​​the soil, which is conducive to absorbing more heat and increasing the temperature of the ground. The cover film can increase the ground temperature by 1°C～3°C, and increase the near-ground illumination. 2. Dig the cold ditch. In order to reduce the exchange of heat between the indoor and outdoor soils, digging the cold ditch at the front edge of the greenhouse is required. The depth of the cold ditch is the thickness of the local permafrost, which is equal to half of the thickness of the permafrost. It is filled with thermal insulation materials such as weeds and horse dung, covered with plastic film and soil. 3. Add organic fertilizer in greenhouses and greenhouses. The biogenic heat released after the decomposition of these organic fertilizers can increase the temperature of the ground. At the same time, the increase of soil organic matter can also increase the ability of the soil to absorb heat and heat. 4. Maintain soil moisture. The soil contains a lot of dark water, which can improve the ability of the soil to absorb heat. The large heat capacity of water also increases the soil's ability to keep warm. 5. Early sheds. In greenhouses and small and medium sized sheds, it is necessary to advance the shed cover film to increase the heat storage of the soil. 6. Underground heating. The use of electric heating lines, heating material hotbeds, underground hot water pipe channels and other equipment for soil heating is the most effective measure to increase the ground temperature, but the cost is higher. 7. Cool down. In the spring when the ground temperature is too high, in addition to lowering the temperature by lowering the ground temperature, it is also possible to use watering methods in the evening to reduce the ground temperature.