First, shallow water and should not be too large at low temperatures, the corresponding reduction in the amount of water, so the amount of watering should be small, the interval is appropriate to some longer, should not flood irrigation, should be watering or spraying is appropriate, so as not to cause low temperature and humidity caused by vegetable roots . After the first two days of watering, it is easy to cause the humidity in the shed to increase. It is necessary to pay attention to reasonable ventilation to reduce the temperature and prevent the occurrence of diseases.
Second, the watering time should be arranged in the spring watering vegetables before and after noon, and after 10 o'clock in the morning after 3 o'clock in the afternoon, the greenhouse temperature is higher, and the side effects after watering are the minimum. Avoid watering in the early morning and evening to prevent freezing of vegetables. Watering should use well water as much as possible, because the well water temperature is higher, which can reduce the physiological stimulation of vegetables.
The third is to look at the days of flexible watering According to the weather conditions, to master the principle of “the weather is suitable for more pouring, less cloudy or not pouring, wind and rain avoid watering†principle. When the weather changes from sunny to cloudy, the amount of water must gradually decrease, and the interval should be appropriately extended. From cloudy to sunny, the amount of water should increase from small to large, and the interval time should be shortened.
Fourth, watering should have a large shed in the southern part of the southern part of the soil moisture evaporation, the amount of watering can be more appropriate; greenhouse east and west sides of the lower temperature, sunshine time is short, the amount of watering should be less appropriate.
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