Water and fertilizer management

1. Water management. In the deep winter season, on the basis of the early watering, the principle of "five watering and five no watering" is generally mastered, that is, "watering on sunny days, no watering on cloudy days; watering in the morning but no watering in the afternoon; watering small water, not flooding water; Pour warm water, not cold water; water in the dark, not open water". If the crops are short of water, you can choose to use small water under the film or drip irrigation to avoid lowering the ground temperature.

2. Fertilizer management. The growth and development of vegetable crops in late winter are slow and require less fertilizer. If top dressing, use decomposed organic fertilizer and biological bacterial fertilizer as the main fertilizer, and top dressing fertilizer as little as possible. When chemical fertilizer is needed, it is best to cooperate with drip irrigation and implement integrated water and fertilizer management. You can also choose fine weather and spray anti-disease agents for foliar top dressing. After the climate turns warmer in late winter and early spring, increase watering and fertilization times appropriately.

Management of severe weather

1. Management of cold wave and cooling weather. When facility vegetables encounter severe cold, the following emergency measures can be taken: one is to add films, grass curtains, etc., and multi-layer covering and heat preservation; the second is to reduce the ventilation time and maintain the temperature; the third is to use a variety of heating facilities to increase the temperature manually , It is better to use a special heating lamp, and the exhaust pipe heated by the fire should be tightly sealed to prevent the smoke from leaking and causing vegetable damage.

2. Management of windy weather. First, before the onset of strong wind, it is best to use a cloth-covered laminating rope or iron wire to compress between the arches to prevent the laminating rope from wearing the film; the second is to close the vent when the wind is strong during the day, and appropriately increase the laminating line , Tie tightly, and fix the film to prevent wind; third, if there is a strong wind at night, in addition to covering the grass curtain and rain film, press two iron wires or laminating ropes horizontally from east to west to prevent the strong wind from lifting the shed at night.

3. Management of snowy weather. Cover the roof top and the outer slope of the wall behind the greenhouse in advance with rain and snow protection facilities such as plastic film or asbestos tiles to ensure that the wall is not damaged. In the case of heavy snow, add uprights to reinforce the shed to enhance its compressive capacity and prevent accidents of the shed from collapsing. Clear the snow on the shed and the snow on both sides of the shed in time to prevent it from absorbing a large amount of heat when it melts and reducing the temperature in the shed. When clearing snow, try to avoid damaging the shed film. After the snow stops, remove the straw curtain and other coverings to make the seedlings shine. If it suddenly turns clear after continuous snowy weather, you should "reveal the curtain" at intervals and observe the changes of the seedlings. If you find wilting, return the curtains immediately and uncover them after recovery. Repeat this for 2-3 days to transfer to normal management.

Zhengzhou Delong Chemical Co., Ltd. is a plant growth regulator production base in China, established in 2009, specializing in the production of plant protection products. If you have any questions, please feel free to contact us any time.