How to keep greenhouse vegetables warm in winter*********
Answer: Chang Zongtang, a consultant from the old Yangling Association for Science and Technology and a researcher at Northwest A&F University, said: To grow greenhouse vegetables in winter, it is necessary to adapt measures to local conditions and adopt comprehensive thermal insulation measures. 1. The use of high light-transmitting plastic film can promptly remove dust, snow and other shades on the shed film, which can enhance the light and increase the temperature in the shed.
2. Increase the thickness and compactness of the grass thatch, or cover with high-quality insulation quilt. In the deep winter, a layer of ordinary plastic film or old plastic film can be added to the grass thatch to prevent rain and snow from wetting the grass, but also improve Insulation.
3. Discharge corn stalks on the back wall of the greenhouse to increase heat preservation.
4. Increase the application of organic fertilizers and heat brewing materials. Add horse manure, sheep manure, chicken manure, wheat straw, etc. on the premise of not causing fertilizer damage to improve soil heat storage capacity.
5. High-ridge cultivation, mulching film to increase the ground heat absorption area, mulching film has the function of reflecting light, increasing temperature and protecting moisture.
6. Multi-layer covering and heat preservation. Two layers and three layers of film can be added to cover and keep warm indoors.
7. Cold-proof ditch outside the front eaves. Reduce the lateral heat conduction from the soil to the outdoors.
8. Block up the *** gap. Prevent the intrusion of cold wind and reduce heat dissipation in the gap.
9. A layer of grass curtains stand at the front and an apron film is added.
10. Use warm water for irrigation to increase soil heat storage.
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