As the temperature rises, should vegetables be "frozen in spring and autumn"?

    Seize the opportunity of spring temperature rise, strengthen the late management of overwintering vegetables in the solar greenhouse, and prolong the harvest time. Strengthen water and fertilizer management, mainly compound fertilizers and organic fertilizers, and use foliar fertilizers and some fertilizers that promote root production to promote root growth, and carbon dioxide fertilization can be carried out if conditions permit.

    1. Temperature management The plant's own cold tolerance and the matching of temperature-increasing and thermal insulation facilities are suitable for the growth of overwintering greenhouse crops. Among the four elements of water, fertilizer, gas and heat, temperature is the most active factor for crop growth. Antifreeze to protect seedlings and heat preservation to promote growth are the top priorities of greenhouse overwintering management. Mainly from the aspects of enhancing the cold tolerance of the plant itself and the matching of warming and thermal insulation facilities.

    2. Spring greenhouse vegetables should be arranged reasonably, and the greenhouse should be closed 15-20 days in advance to increase the ground temperature. Timely soil preparation and fertilization, pay attention to balanced fertilization, and increase the application of organic fertilizers.

    3. The planting should be selected in the morning on a sunny day. In order to achieve early planting, multi-layer covering technology can be adopted, and preparations for temporary warming can be made.

    Strengthen pest control

    1. The occurrence of pests is conditional and regular. Implement timely prevention and control, adhere to symptomatic prevention and control, and choose the right time and appropriate spraying equipment for prevention and control.

    2. Through reasonable fertilization, watering, timely pruning, removing diseased old leaves and other measures, improve plant resistance, improve the growth environment, and prevent the occurrence of pests and diseases.

    Prepare for severe weather

    In spring, extremely disastrous weather such as continuous cloudy days, "cold spring", and strong winds are prone to occur, causing serious harm to vegetable production. It is necessary to pay attention to the weather forecast information in time, and take effective measures before the disaster to prevent the occurrence of chilling and freezing damage of vegetables.

    1. Strengthen insulation. The "cold spring" weather will cause serious harm to the production of vegetables in spring, so it is necessary to do a good job of thermal insulation and cold protection. Seal the holes and cracks in the greenhouse film to prevent the cold wind from blowing directly into the room from the vent to damage the plants. And according to the temperature changes, straw curtains or non-woven fabrics can be covered on the small arch shed and around the greenhouse at night to increase the thermal insulation capacity.

    2, to prevent wind disasters. In spring, windy weather is more likely to occur. Pay attention to weather changes in time, and fix the covering in advance to prevent it from being lifted by the wind and causing damage to the shed.