Recently, the temperature has dropped again, cold air has hit, the temperature has plummeted, and the anti-freezing of greenhouse vegetables is no longer a problem. Do you have any anti-freeze measures for farmers? Today, Xiaobian teaches you the 12 points of anti-freezing damage in greenhouse vegetables.

1, pay attention to check the weather forecast

Vegetable farmers should pay attention to the weather information in the next few days across the country, the latest weather disaster warning information.

2. Reinforce and seal the facility in advance

According to the freezing rain and snow disasters that have occurred in the past years, the facilities will be strengthened in time, and the areas where the greenhouses are easy to loosen will be carefully inspected and strengthened, the tightness of the laminating lines will be adjusted, and the damaged parts will be repaired in time to avoid air leakage.

3, choose the light film insulation effect better shed film

Use a multi-functional membrane with good light transmission and heat preservation effect produced by regular manufacturers, such as no drip film.

4, multi-layer coverage

In the event of freezing rain and snow disasters, multiple layers of cover are provided in the greenhouse in time, such as erection of medium sheds and small arch sheds, combined with film covering night covering straw curtains, sacks, non-woven fabrics, sunshade nets, etc. The warm vegetables of solanaceous fruits and melons should cover more than 3 layers, sealing vents and inner sheds.

5, increase the geothermal storage in the greenhouse

Cover the mulch film and small arch shed early, add organic fertilizer and bacterial fertilizer, cover the corn stalk, chaff and sawdust on the walkway in the shed, and choose the sunny weather to pour the anti-freezing water before cooling, and reduce the air humidity in the shed to increase the temperature and keep warm.

6. Clear snow in time

The next morning after the snow, try to remove the snow from the shed and the surrounding area, so that the shed can receive light as much as possible, and if necessary, add support columns in the shed. Immediately after the snow, clear the ditch to eliminate snow and water, and prevent the heat from being absorbed by the large amount of heat when the snow and ice melt.

7, supplement heating

When the cold weather is coming, if the temperature condition is still not met by the multi-layer coverage, you can turn on the light at night to fill the light, install the electric heating line or burn the briquettes to supplement the heat.

8, choose a variety of strong resistance

Winter and spring facility vegetable production, variety selection is very important, especially for warm fruits and vegetables, should pay attention to the selection of cold, cold, cold, and moisture resistant varieties.

9. Correctly determine the sowing date and colonization period

According to the different types and varieties of vegetables, the local climatic characteristics and the thermal insulation performance of the facilities, the sowing period and the planting period should be correctly determined. It is not possible to blindly plant and plant seeds early. Planting and planting should choose a windless sunny day at the end of the cold.

10, low temperature exercise during seedling stage

When the germination is carried out, the seeds whose radicle has not been exposed to the seed coat are placed at a low temperature of -2 °C for 2 to 5 hours, and the germination is slowly thawed and then re-germinated to make the buds strong and cold-resistant. The seedlings pay attention to control the temperature in the long-term growth period, adopt the management method of large temperature difference to prevent the lengthening, improve the resistance of the seedlings, strengthen the ventilation and ventilation after the seedlings and the first 2 days of planting.

11, reasonable topdressing

Before the advent of cold wave, pay attention to reduce the amount of nitrogen fertilizer to avoid plant growth. If necessary, foliar spray 0.3% potassium dihydrogen phosphate solution, compound brown sugar 150 times solution, spray 2~3 times or spray cold resistance agent 1~2 times. .

12, reasonable watering

It is best to use drip irrigation and seepage irrigation under the membrane to prevent the ground temperature from falling due to watering.

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