After New Year’s Day holiday, cold air is coming! On the 7th, the temperature in the northern region will once again hit a new low in a large area, and on the 8th, the temperature in the south will start to drop. For example, the temperatures in the eastern part of the southwest, south of the Yangtze River, and south China will gradually refresh to a new low this winter, and the lowest temperature in some areas will reach -20℃.
The cold wave has the characteristics of wide influence range, severe cooling, low temperature and long duration of gale, and the coldest weather since winter will appear in most areas. Sudden low temperature, strong wind and snowfall may cause serious damage to the production of overwintering vegetables and flowers. How should agricultural greenhouses respond to the cold wave?
Measures to deal with cold wave in agricultural greenhouse
（1）pay attention to the weather. To make full use of radio, television, mobile phone text messages, WeChat, etc., pay attention to the weather changes in a timely manner, enhance the awareness of safety and risk prevention, and make preparations for disaster weather response such as low temperature, strong wind and snow as soon as possible.
(2) Prevention of diseases. Before cold wave, rain and snow, choose fine weather to spray vegetables to prevent diseases. Because spraying liquid medicine in rain and snow can easily lead to humidity increase and disease occurrence, dust method and aerosol should be selected. On cloudy days, do not carry out farming operations such as watering, spraying medicine, pruning and forking, so as to avoid the occurrence and prevalence of diseases caused by the increase of humidity in the shed and the wound of vegetables.
(3) heat preservation and cold protection. Scientifically manage fertilizer and water, rationally control the temperature, humidity and light in facilities, and do a good job in keeping warm and resisting cold in greenhouses. Focus on the investigation of agricultural facilities safety risks, find hidden dangers and eliminate them in time, and strive to reduce the impact of disasters.
(4) Strengthen thermal insulation. Do a good job in thermal insulation of greenhouse buildings and prepare agricultural heating facilities. It is recommended to use clean energy equipment for heating. Do not cut off power in the middle, and make good ventilation to reduce heat loss, so as to keep constant temperature when cold wave strikes.
Air source heat pump escorts agricultural temperature control
China is a big agricultural country, and the issues concerning agriculture, rural areas and farmers have always been regarded as the top priority. Green planting, ecological agriculture development and rural revitalization are all related to green sustainable development. Traditional heating facilities such as coal burning are gradually being replaced by clean heating and cooling equipment. As clean heating and cooling equipment, air source heat pump is of great use in the agricultural field with large industrial scale.
The front end (breeding/seedling raising), the middle end (planting greenhouse), the end (drying fruits, vegetables, medicinal materials, etc.), constant temperature and humidity, etc. In terms of agricultural temperature control, air can affect all aspects of agricultural production, and has the advantages of intelligent control, green and low carbon, energy saving and environmental protection. Helping the green upgrade of agriculture, air source heat pump will become the “new protagonist”.