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Shelves vegetables to "spring
The spring is still warm and the temperature changes greatly. At this time, if the greenhouse vegetable is not properly managed, it will easily lead to large fluctuations in the temperature inside and outside the greenhouse, which is not conducive to the normal growth of vegetables. The use of heating furnaces, warm air and other heat sources to increase the temperature, although the temperature can be adjusted inside the shed, but the cost is too high. Therefore, the "æ‚" at this time is very important. The so-called “Spring Breeze†for greenhouse vegetables, that is, after the spring, although the outside temperature has risen, but it is still unstable, do not rush to uncover the membrane and conduct large ventilation, and gradually reduce the temperature difference between the greenhouse and the outside world, so that the vegetables Can adapt to the external environment after film release faster and better. The specific approach is: after the temperature rises, depending on the weather conditions, the temperature difference between day and night, gradually clear the film on both sides and around the booth at noon of sunny weather, and gradually increase the ventilation, until the last full withdrawal. When implementing the “Spring Breezeâ€, it must be noted that the ventilation should be timely, and film removal and film removal should be carried out step by step in order to prevent the temperature in the shed room from being too high and “burning the seedlingsâ€. Practice has proved that the implementation of the "Spring Festival," the greenhouse vegetables, can avoid all the time uncover the film and cause "flash seedlings", the growth is relatively stable, can increase the anti-freeze and disease resistance of vegetables.
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