First, the method of watering should adhere to the under-membrane submerged irrigation, and conditional submerged membrane irrigation can be implemented. This can effectively prevent the ground water from evaporating, reduce the humidity in the greenhouse, and prevent the occurrence of diseases. Second, the watering time is best to select the sunny morning, when the water temperature and the ground temperature are closer, after watering the root system is stimulated by small, easy to adapt to, while the ground temperature is restored quickly, there may be enough time to exclude the greenhouse moisture. Watering in the afternoon will cause a sudden change in the ground temperature and affect the physiological function of the root system. It should not be watered in the afternoon, evening or rain and snow days. Third, the amount of water in the greenhouse watering in winter, flood irrigation should not be flooded. First, significantly reduce the temperature of the earth, hinder the absorption of nutrients by roots and affect their normal growth. Second, it is easy to increase the humidity in the greenhouse and cause diseases. Therefore, the amount of water must be determined according to the weather and plant growth. Fourth, warming up and dehumidifying on the day of watering, in order to restore the ground temperature as soon as possible to close the greenhouse, increase the indoor temperature, with temperature to promote ground temperature. After the ground temperature rises, timely ventilation and dehumidification allow the temperature of the indoor air to fall within a suitable range so as to facilitate the robust growth of the plants. China Agricultural Network Editor
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