Winter is coming, the weather is getting colder and colder, foggy and hazy weather, low temperature, low temperature and high humidity will occur frequently, which will have a certain impact on the production of vegetable products. The Vegetable Experts Group of the Ministry of Agriculture and Rural Affairs put forward technical advice on winter vegetable management, and requested to strengthen the classification guidance and take targeted measures to strengthen the production management of winter vegetables.
Continue to grasp the late tube and harvest of autumn vegetables
With the arrival of winter, cabbage, green leafy vegetables and rhizome autumn vegetables should stop watering and fertilizing, pay close attention to weather changes, and harvest in time. Due to the high air humidity, the celery and amaranth groups are closed and susceptible to infectious diseases. It is necessary to strengthen the prevention and control of diseases and to be listed in batches.
Take measures to deal with foggy weather
Reasonably control the temperature. In the cold and cloudy days, night cover should be added to improve the insulation performance of the facility and prevent chilling. At night, it is necessary to pay attention to the full compaction of the grasshoppers, and the foot of the solar greenhouse is firmly pressed. The temperature is higher than the foggy day, the light is weak, it should be properly ventilated, and the temperature should be controlled below 22 °C, in case the temperature is warm.
Improve lighting conditions. Remove dust and grass clippings from the shed film in time to keep the shed film clean and improve light transmittance. Cover the cover at the right time and make full use of the scattered light on the cloudy sky.
Reduce air humidity. In continuous foggy days, the indoor air humidity in the shed is large, watering should be stopped, and ventilation should be carried out in time. When the temperature in the shed is appropriate, proper ventilation should be maintained to keep the air flowing and reduce the humidity.
Strengthen disease prevention and treatment. To control pests and diseases of vegetables in greenhouses in foggy days, it is necessary to pay attention to the use of symptomatic and high-efficiency pesticides, and try to apply the smoke method or dust method. Must be applied by spray method, to minimize the number of prevention and control, reduce the humidity in the shed.
Early arrangement of facility vegetables winter management measures
Pay attention to wind and snow. In the windy weather, the film rope should be pressed tightly, and on the grasshopper and the outer film, the two thin steel cables of the cloth sleeves are pressed laterally according to the east and west, which can effectively prevent the wind from blowing the grasshopper together with the outer film. Windy days should be sealed to prevent strong winds from blowing into the greenhouse.
It is necessary to cover the grasshoppers early in the snowy weather, and the grasshoppers are covered with a film of rain and snow, and the snow is cleaned in time after the snow. It is also possible to prepare a part of the spare column in advance. If the snow is too large, add a column at a distance of 3 meters from the front of the greenhouse to prevent the front snow from crushing the shed.
Control the temperature of the greenhouse. In the winter, it is necessary to adhere to the "late cover". After pulling the grass in the morning, make sure that the indoor temperature does not decrease. When the temperature in the greenhouse drops to 20 °C in the afternoon, cover the grass in time to maintain the room temperature.
Do a good job in water and fertilizer management. In the middle and late November, you should choose sunny watering, and try not to water in the deep winter. When the vegetables are deficient in water, you can choose a good weather in sunny weather. Use drip irrigation under the membrane, micro-sprinkling or watering under the membrane to avoid the ground water temperature. Winter vegetables grow slowly, need less fertilizer, topdressing should be based on decomposed organic fertilizer and biological bacterial fertilizer, it is best to cooperate with drip irrigation, micro-sprinkler irrigation, implement integrated management of water and fertilizer, also choose sunny weather, with spraying anti-disease The agent is used for foliar topdressing.
Even the cloudy response. In the continuous cloudy (snow) days, try to reduce ventilation, and cover the grass in the afternoon, so that more heat is accumulated in the greenhouse. As long as there is no snow in the weather, you can uncover it before noon, make full use of the scattered light, and fill the light at the same time in the light-filling condition, and cover it in the afternoon. If the temperature is low at night, the condition can be properly compensated. After the weather turns fine, it should be gradually revealed. If the leaves of the plants are found to be wilting, they should be covered immediately. After the plants are restored, they will be gradually removed.
Disease prevention and treatment. To reduce the occurrence of vegetable diseases in the solar greenhouse, it is necessary to minimize the humidity of the air in the greenhouse. When using drugs to control vegetable diseases, try to use dust or aerosol.
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