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.
1. Temperature management. After entering the winter, tomatoes in greenhouses should be focused on heat preservation and temperature increase. Low temperatures will cause tomatoes to fall, fruits, 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 within the shed. Generally, the temperature during the day is maintained at 23°C to 28°C and at night from 15°C to 18°C. The temperature above 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.
2. Light and ventilation. Tomatoes are hi-light crops. When the light is sufficient, the plants grow vigorously and have strong resistance to disease. 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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