How to deal with rainy and snowy weather in greenhouses?

Continuous snowfall is extremely detrimental to greenhouse vegetable production. In order to reduce the impact of meteorological disasters on vegetable production and reduce losses, vegetable experts have put forward the following guidance on how to deal with heavy snowfalls.

For sheds with weak skeletons, add appropriate pillars to improve the shed's ability to withstand wind and snow disasters; seal the shed, tighten the shed membrane, and fix the external insulation covering to prevent wind damage; clear the snow on the shed promptly to prevent causing the shed to collapse.

Increase external insulation coverage. Add a layer of plastic film to the outer insulation covering such as thatch and insulation quilt to prevent the outer insulation covering from absorbing water and reducing the insulation effect, and to facilitate the removal of snow on the greenhouse.

Multi-layer coverage enhances internal insulation. Add an insulation curtain in the greenhouse, which can be opened during the day and hung up at night; a thick insulation curtain should be hung on the connecting door between the buffer room and the greenhouse; if conditions permit for a large greenhouse, a simple middle shed and a small arch shed can be added to form three sheds at night Covered with four membranes; if there are idle sunshade nets or non-woven fabrics, the small internal thermal insulation arch shed can be covered with sunshade nets and non-woven fabrics at night; a 1-meter-high thermal insulation skirt film can be added to the front edge of the shed.

Frequently wipe the shed film to increase light transmission and increase the temperature inside the shed. Even on cloudy days, you should insist on uncovering the cover to expose scattered light for 3-6 hours, so that the vegetables in the shed can see light for a short time to maintain the life and activity of the plants.

Indoor fill light Hang reflective film on the back wall, and add plant growth lights in the greenhouse to provide light. Each light is 40W. It is appropriate to install 25 lights per acre, and provide more than 3 hours of light per day.

Emergency warming measures. When the greenhouse temperature of warm-loving vegetables continues to be lower than 5℃, and the greenhouse temperature of cold-loving vegetables continues to be lower than 0℃, temporary heating measures such as electric fans, hot air stoves, and combustion heating blocks should be used.

Strictly control irrigation. Watering is strictly prohibited during low temperature periods to avoid lowering the ground temperature and aggravating cold damage and freezing damage. Normal water management will be resumed after the weather warms up. Watering should be done "three waterings and three no waterings", that is, watering on sunny days and no watering on cloudy days, watering before noon and no watering in the afternoon, watering small amounts and no watering large. The water temperature for irrigation should be above 10℃.