What are the methods for increasing the temperature of greenhouses?

- Covering with insulation film: Selecting plastic films with good light transmittance and strong insulation performance, such as EVA film, PO film, etc. to cover the greenhouse can effectively reduce heat loss. Multi-layer covering can also be used, such as adding two films and small arch sheds in the greenhouse.

- Covering with insulation curtains: Covering the outside or inside of the greenhouse with straw curtains, insulation blankets, etc., putting them down at night can prevent heat from radiating outward, and rolling them up during the day is conducive to lighting and warming.

- Reasonable selection of shed site and shed type: Choose a place with high terrain and good light to build a shed, and use a shed type with a large lighting area, such as an arch shed, a solar greenhouse, etc., so that the greenhouse can fully receive sunlight in winter.

- Use reflective curtains: Hang reflective curtains on the north wall of the greenhouse to reflect light to the ground and crops in the greenhouse, increasing the light intensity and temperature.

- Stove heating: Placing a stove in the greenhouse to generate heat by burning coal and other fuels is suitable for greenhouses with smaller areas.

- Heating with a heater: Use a heater to convert electrical energy or fuel energy into thermal energy, and blow hot air into the greenhouse through a fan, which heats up quickly and has a more uniform temperature distribution.

- Heating with electric wires: Bury electric wires in the greenhouse soil, and generate heat to increase the ground temperature after power is turned on. It is often used in nursery beds or small planting areas.

- Compost fermentation and heating: Stack fresh horse manure, straw, etc. in the greenhouse to ferment and generate heat, and at the same time increase the concentration of carbon dioxide, which is beneficial to crop growth.

- Ventilation and temperature control: Proper ventilation and air exchange at noon on sunny days to expel moisture and cold air in the greenhouse, introduce warm air from the outside, and increase the temperature in the greenhouse.