Affected by the strong cold air, the 48-hour minimum temperature in most areas of Yancheng City will drop by 12 14, and the minimum temperature will drop to about -4.
In order to ensure the safe growth of melons and vegetables, prevent frost damage and greenhouse damage, and ensure stability, the following production management technologies are proposed:
1. Management of open-field vegetables. The city's open-field vegetables mainly include cabbage, garlic, spinach, etc., and farmers with conditions can speed up the harvesting and storage, reduce frost damage, and ensure that vegetables. Before the arrival of low temperature rain and snow weather, clean the ditch and manage the moisture, timely cover the rice and wheat straw, film and other ways to keep warm and cold, after the rain, timely drainage, ensure that the rain is dry over the field, and cover the grass curtain, old film, sunshade net, etc. at night to reduce frost damage.
2. Facility melon and vegetable management. The main melons and vegetables in the field facilities are zucchini, green peppers, celery, broccoli, eggplant, etc., which should be kept warm and warmed.
1. It is necessary to increase the shed film. Before the cold snap, a layer of film should be added to the field facilities, and the cultivation of "double greenhouses, three greenhouses + small arch sheds and four films" should be used, and grass curtains, non-woven fabrics and other coverings should be added to the canopy at night to keep warm.
2. It is necessary to increase the windshield film. Add wind shield film or straw curtain at the foot of the front of the solar greenhouse, on both sides of the apron of the greenhouse, in the ear room or at the entrance of the greenhouse to improve the insulation effect.
3. Strengthen the facilities. Pay close attention to weather changes, rain and snow weather, should strengthen the shed in time, repair the broken film of the shed, support in the shed, and clean the snow on the roof of the shed to avoid the snow overwhelming the greenhouse.
4. Heating equipment should be added. Sudden and large cooling, the shed drops below 5, can be heated by stoves, hot blast stoves, heating, etc., timely ventilation, pay attention to safety, and prevent carbon dioxide poisoning.
5. Pay attention to disease prevention and control. Control watering, dredge the field ditch, deepen the greenhouse ditch, so that there is no water in the shed after rain and snow. Every 7 10 days, fumigation with carbendazim, 60% Pythium smoke agent or 45% chlorothalonil fog agent at night to reduce the occurrence of diseases.
3. Seedbed management. Early in spring, eggplant fruits and melon vegetables have entered the seedling period, and heating equipment such as electricity and heaters should be turned on at night, and non-woven fabrics and grass curtain coverage should be increased to cope with low temperature weather. Properly control the moisture, watering when the substrate is white, and increase potassium fertilizer to improve lodging resistance and cold resistance when watering. Timely uprooting of diseased plants, the use of aerosols or medicinal soil to prevent diseases, can choose carbendazim, chlormetyl and other pesticides.
Fourth, strengthen follow-up field management. In case of disaster, it is necessary to clear the ditch and manage the moisture in time, remove the water and snow in the field, prevent staining, remove the non-woven fabric and other coverings in the shed on sunny days, increase ventilation and light transmission, cut off diseased branches, top dressing and spraying, and promote plant growth.