Cold, cold, cold! Hebei News Network reported that the province ushered in the first round of extreme cold wave after the Spring Festival, and the temperature was like a "roller coaster", and the temperature in some areas could drop by more than 20.
At present, most of the fruits and vegetables in the wintering stubble facilities in our province are in the flowering and fruiting stage, and the vegetables in the early spring stubble facilities are planted one after another. In view of the possible adverse effects of this cold wave and windy weather, experts from the Provincial Department of Agriculture and Rural Affairs suggested that vegetable growers take five countermeasures to avoid and reduce losses.
First, check whether the shed film is damaged and repair it in time, strengthen the film pressing line, and compact the shed film. Fix the insulation quilt and other coverings, and use waste shed film or insulation quilts to cover in multiple layers. Check whether the shack skeleton riveting, tie rods, card slots, etc. are strong, and add columns as soon as possible for sheds with poor wind and snow resistance.
Second, the shed can be covered with two layers of film or erected a small arch shed for insulation. Prepare heating equipment such as warming blocks, and increase the temperature of the shed if necessary. Close the vents and entrances and exits in time before the strong wind comes to prevent cold damage and frost damage to vegetables.
Third, remove the snow in time to prevent the snow from collapsing the skeleton of the shed. In continuous snowy weather, when there is no snow during the day, the insulation cover can be rolled up for a short time, allowing crops to use scattered light for photosynthesis. After snowfall, the shed film should be cleaned to ensure light transmittance and increase light.
Fourth, to supplement the nutrients of the growing vegetables, you can spray potassium dihydrogen phosphate and amino acids, humic acid or alginic acid and other plant foliar fertilizers on the foliar surface to improve the cold resistance of plants.
Fifth, observe the temperature and humidity in the shed at any time, ventilate and disperse the humidity for ten minutes every morning according to the weather conditions, and minimize the humidity in the shed and reduce the occurrence of diseases under the premise of ensuring the temperature of the shed.
According to the weather forecast, this cold spell will last until the 23rd. Fellows, you can remember the five steps of facility vegetables to prevent cold and warmth, and "add clothes" to the vegetable greenhouse to prevent "cold".