Adjust the temperature and humidity in the greenhouse

According to statistics, the economic losses caused by diseases in greenhouse production can reach about 30%, and the highest ones can reach more than 50%. Disease prevention and control is one of the main tasks of current greenhouse production, and the control cost accounts for more than 30% of the total production cost. How can we make crops in the greenhouse less sick or even sick? This requires the producer to properly regulate the temperature and humidity of the greenhouse. Most diseases occur and develop under conditions of low temperature and high humidity. The most scientific and economical measure to control the occurrence of diseases is to increase the temperature and reduce the humidity. The two conditions of low temperature and high humidity do not meet or shorten the meeting time. In general, the room temperature rises above 26°C and the humidity drops below 80%. Diseases rarely occur. How can we increase the temperature? In general, first increase the light, increase the temperature of the greenhouse. Followed by checking plugging pores to reduce heat loss. The third is to increase coverage and try to keep warm. The fourth is to dig wells to prevent cold and reduce ground conduction. Fifth, increase organic fertilizers, apply straw reactor technology, increase ground temperature, and store heat energy. How can we reduce the humidity? In principle, it should be reasonable to ventilate and scientifically apply water. Planting period should be filled with bottom water and covered with plastic film to reduce the transpiration of soil moisture. In mid-fertility, the groundwater should be filled with small water to ensure that the soil is dry and wet. When fruit is full, pour plenty of water where appropriate, and let the air out. In the low temperature season and after the curtain is opened in the morning, if there is a large amount of fog in the room, put it in a small breeze for 5 to 10 minutes immediately. Then close the tuyere, wait until the temperature rises to 28 °C ~ 30 °C and then repeatedly put a small breeze. In the afternoon, the room temperature should be kept above 25°C before the curtain is closed. When watering, the air outlet should be sealed and the indoor temperature should be raised to above 32°C to allow the surface water to evaporate into water vapor as soon as possible so as to remove moisture through ventilation. When the humidity is too high at night, it is necessary to take warm-up measures to increase the temperature and prevent the bacteria from invading after the foliage surface is dew.

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