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Greenhouse vegetable pay attention
In winter, vegetables in greenhouses or greenhouses, in addition to taking warm measures, it is more important to control the air humidity in the shed. If the air humidity is too high, vegetables are prone to pests and diseases. Therefore, we must grasp the ventilation time during this period. Exhaling is to reduce the humidity in the greenhouse and reduce the occurrence of pests and diseases. Experts suggest that, especially at noon, attention should be paid to the release of wind. When the temperature in the shed is between 25 and 35 degrees, the air is released for a long period of time, and 2 hours are required for about 20 degrees. In addition to ventilation, proper planting density also helps to increase ventilation and reduce pests and diseases. Experts suggest that vegetables in greenhouses and greenhouses are best covered with mulch, which will help reduce the evaporation of moisture in the soil, reduce air humidity, and will not be susceptible to pests and diseases.