How to regulate and control the ground temperature of greenhouse

1. High ridge cultivation, plastic film mulching. High ridge cultivation in greenhouse and greenhouse can increase the surface area of soil, which is beneficial to absorb more heat and increase soil temperature. Plastic film mulching can not only increase the ground temperature by 1 ℃-3 ℃, but also increase the light near the ground.

two。 Dig a cold ditch. In order to reduce the exchange of indoor and outdoor soil heat, cold-proof ditches should be dug at the front of the greenhouse. The depth of the cold-proof ditch is the thickness of the local permafrost, and its width is equal to half of the thickness of the permafrost. It is filled with thermal insulation materials such as weeds and horse dung, and is covered with plastic film and soil.

3. Increase the application of organic fertilizer in greenhouse and greenhouse. The biological heat released by the decomposition of these organic fertilizers can increase the ground temperature. At the same time, the increase of soil organic matter can also improve the endothermic and thermal insulation capacity of soil.

4. Maintain soil moisture. Most of the water in the soil is dark, which can improve the heat absorption capacity of the soil. The large heat capacity of water can also increase the heat preservation capacity of the soil.

5. Buckle the shed early. Greenhouse and small and medium-sized greenhouses should be covered with plastic film in advance to increase the heat storage of the soil.

6. Underground heating. The use of electrothermal heating line, brewing hotbed, underground hot water pipe channel and other equipment to heat the soil is the most effective measure to improve the ground temperature, but the cost is high.

7. Cool down. When the ground temperature is too high in spring, in addition to lowering the air temperature, we can also use the method of watering in the evening to reduce the ground temperature. Xu Yongmei