Since October 24, temperatures in some regions of northwestern China and northern China have experienced significant cooling, which has adversely affected facility agriculture. To this end, the reporter interviewed Li Jianming, a professor at the College of Horticulture, Northwest A&F University. “The low temperature of the cooling weather and the weakening of the light affect the photosynthesis of the crops in the shed, and affect the crop yield and quality.” Li Jianming reminded the farmers that the shed should be completed in three aspects: inspection and reinforcement of greenhouses, cold insulation, and light compensation. Protective work to ensure the normal growth of crops.

The inspection and strengthening of greenhouses are often accompanied by high winds. Li Jianming believes that under such circumstances, farmers should timely check the damage to the greenhouse sheds and the firmness of the scaffolds, repair the problems discovered in time, and reinforce the scaffolds and films to prevent cold weather from producing them. Negative Effects. Li Jianming said that the performance of greenhouses is good and the temperature is good. Therefore, farmers should choose scientifically designed greenhouses and they should not make arbitrary changes to greenhouses.

"Cold insulation" "Cooling weather, we must do a good job in the insulation of the greenhouse facilities, to prevent low temperature, cold damage." Li Jianming suggested that farmers can take measures to cover the insulation of greenhouses, improve the temperature inside the greenhouse, the insulation is generally 3 square meters per square meter kg. In addition, it is necessary to reduce the ventilation of the greenhouse and control the ventilation time. Ventilation openings in greenhouses should not be too large. In terms of ventilation time, farmers are advised to ventilate for 10-20 minutes between 9:30-10:00 in the morning.

Filling the light "cooling days, the crop light in the shed weakened, timely fill light is necessary for crops." Li Jianming believes that the most economical and feasible way is to increase the temperature during the day, after the temperature rise, timely uncovering the greenhouse cover for Crops grow for temperature and light. In addition, farmers can take some light-filling measures, such as the installation of LED lights, bio-sodium lamps and other light sources in the shed, timely fill light in the greenhouse, increase the light in the shed.

Here, the Central Meteorological Observatory reminded farmers that, from 28 to 31 October, there will be a medium-strength cold air that will affect the central and eastern regions of the country from the north to the south, bringing about obvious cooling weather, and farmers should pay attention to weather information in a timely manner. We will do a good job of preventing wind and heat insulation for facility agriculture, strengthen monitoring and prevention of crop diseases in greenhouses, and mitigate adverse effects.

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