At the beginning of the new year, vegetable management needs attention.

    The New Year's holiday is over, the work starts, and agricultural management needs to be paid attention to. At this time, the climate in the northern region is still cold, the temperature is low, there is still snowfall, and there are strong winds from time to time, but the temperature begins to rise day by day, and the hours of light are gradually extended. Greenhouse overwintering stubble vegetable management is the busiest time.

    Greenhouse Vegetable Management in Spring

    Greenhouse vegetables in spring refer to melons and vegetables that are harvested from March to early July. Most vegetable varieties enter the vegetative growth period after the beginning of spring, and the vegetative growth of vegetables coincides with flowering and fruiting. Do the following training management tasks:

    ⑴ heat preservation and antifreeze. There are two reasons for the occurrence of chilling and freezing injuries in early spring: First, the vigorous growth of plants, coupled with the increase of water and fertilizer in artificial management, significantly reduced the cold resistance of plants. After the beginning of spring, there is still a large cold current, which causes freezing and chilling damage to vegetables in the greenhouse. To this end, we must continue to do a good job in preventing cold and freezing. Vegetables already have a large amount of growth and must be covered with secondary film in the greenhouse. In addition to the use of secondary film covering, straw bundles can be stacked around the skirt film outside the greenhouse to enhance resistance to air-conditioning intrusion around the greenhouse; vegetable seedlings are still in the seedling stage, and the small arch can be covered at night. Shading nets, straw curtains or no Weaving cloth to enhance thermal insulation ability; in case of strong cold air, be sure to take antifreeze thermal insulation measures.

    ⑵ do a good job of ventilation. As the sunshine time increases, the temperature rises, and the humidity in the shed increases. In order to reduce the occurrence of pests and diseases and meet the environmental conditions for vegetable growth and development, it is necessary to do a good job in the management of temperature and humidity in the shed. Door opening and film removal, ventilation, door closing and cover film insulation management.

    (3) Do a good job in protecting flowers and fruits. Low temperature will affect the fertilization results of many melon and vegetable varieties, and it is prone to flower and fruit drop. In current production, to improve the method of fruiting, one is to apply plant growth regulators to the flowers or apply them to the ovary. The application of plant growth regulators should be used according to the instructions to prevent excessive concentration and phytotoxicity. The second is to use artificially assisted pollination.

     ⑷ Do a good job in pest control. As the temperature rises and the humidity in the greenhouse increases, the vegetables in the greenhouse are prone to gray mold, blight, fusarium wilt and aphids. Pest control should use a combination of agricultural control and chemical control, such as good temperature and humidity management in the shed, reducing the humidity in the shed, spreading grass in the furrows, fertilizing water reasonably, pruning branches in time, removing diseased old leaves, and spraying the appropriate pesticides for prevention, etc. .