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2. Before cultivating the soil in the cultivating soil, combining the cultivator with the cultivator, the soil will be cultured next to the root, which can loosen the soil, protect the root system, and enhance the vitality of the root system. The cultivator depth should be 7-10 cm.
3, timely uncover the grass weeds to early cover the late cover, so that the daytime temperature is maintained at 25-30 °C, kept at 12-15 °C at night. As long as it is not raining and snowing, even if it is cloudy during the day, remove all the grasshoppers and increase the lighting as much as possible.
4, increase the application of organic fertilizer According to the growth stage of vegetables, to increase organic fertilizer, biogas fertilizer is better, but also horse dung, rice bran, straw and so on. The microorganisms in these broilers decompose and warm up and increase the temperature of the ground. Can also spray 0.2-0.3% of potassium dihydrogen phosphate solution 2-3 times before freezing, can enhance the ability of vegetables to resist cold.
5. Add a cold-proof ditch to dig 50-60 cm wide cold-proof ditch around the greenhouse. Fill the ditch with wheat stubble, sawdust, firewood, straw, coal residue, etc., and then cover with plastic film or plastic film, and then cover the soil. The temperature in the shelter was lost.
6, clear rain and snow in the rain or snow, the grass cover and the back slope covered with old film, not only can reduce the rain and snow damage, but also the effect of insulation, while the timely removal of snow, reducing greenhouse pressure.
7, set the reflective screen with aluminum plated polyester film or thick white paper for the light curtain. Can significantly improve lighting, improve the temperature inside the shed. The specific method is: In the greenhouse, pull a wire above the back column, and cut the light curtain into 2-3 meters long pieces. Each two pieces are connected together and can be rolled up when not in use.
8. The irrigation time of reasonable irrigation winter vegetables should be arranged on a sunny morning. The irrigation method should choose micro-irrigation. On the day of irrigation, in order to recover the ground temperature as soon as possible, the sheds are generally closed so that they can rapidly increase the temperature and promote the ground temperature with the temperature.
9, multi-layer film in the greenhouse to increase the film, that is, in the greenhouse under the wire, put on the wire to catch the old film at night will flatten the film covering the ceiling, can play a very good insulation effect.
10. Before the advent of smoke and freezing in the shed, straw, wheat mash and other objects are used to smoke in the shed, which can increase the temperature of the greenhouse and delay the cooling rate, which can effectively prevent the occurrence of frost damage.
Sheltered vegetable antifreeze method
1. Repair the shed film and inspect the shed film regularly, and find that the damaged shed film is immediately repaired with a shed adhesive to prevent air leakage.