After entering the winter, as the illumination time becomes shorter and the night temperature is lower, the humidity in the shed will gradually increase, and some low temperature and high humidity diseases will easily occur, which will have an adverse effect on the normal growth of the tomato. In the management of winter tomatoes, special attention must be paid to the control of temperature and light.
After temperature management enters into the winter, tomatoes in the greenhouse should be focused on heat preservation and temperature increase. Low temperatures will cause tomatoes to fall and fall, and even freeze damage. The fruit setting rate will be greatly reduced, which will seriously affect the yield. Therefore, we must scientifically control the temperature inside the shed. In general, the daytime temperature is kept at 23°C~28°C, and at night 15°C~18°C. The above temperature is the optimum temperature for tomato growth. In the event of heavy snowfall or high winds, the temperature can be increased by using coal stoves, heating, or artificial supplemental lighting.
Illumination and ventilation of tomatoes are hi-light crops. When the light is sufficient, plant growth is strong and disease resistance is strong. On the contrary, it will cause the plant to grow in length and grow weakly. It will also create conditions for the infection of diseases. Can be used to hang a light curtain on the back wall, regular cleaning of the dust or dirt on the film, remove the fog droplets in the film and other methods, do everything possible to increase the light in the shed. Ventilation can achieve the purpose of dehumidification, ventilation and temperature adjustment. Ventilation time should be adjusted according to the weather conditions, but a certain amount of ventilation time must be guaranteed every day, which is conducive to normal plant growth.
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