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Precautions for Greenhouse Vegetable Irrigation

Release time:

Mar 11,2024

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Reasonable irrigation is an important measure to ensure the healthy growth and increase yield of greenhouse vegetables. Greenhouse vegetable irrigation depends on both the weather and the condition of the seedlings. According to the experience of Shandong Dida, the following four measures should be taken for watering greenhouse vegetables:
First, the water is shallow and should not be too large. Under low temperature, the vegetables in the shed evaporate slowly, and the water demand is correspondingly reduced. Therefore, the watering amount should be small, and the interval should be appropriately long. Avoid flooding with heavy water, and it is better to irrigate or spray to avoid vegetable root retting caused by low temperature and high humidity. In the first two days after watering, it is easy to cause an increase in humidity inside the greenhouse. It is important to pay attention to reasonable ventilation and cooling to prevent disease induction. Ventilation is generally advisable during high noon temperatures.
Secondly, the irrigation time should be appropriate. Winter greenhouse vegetable irrigation should be arranged around noon, preferably after 10am or before 3pm. During this period, the greenhouse temperature is relatively high and the side effects after watering are minimal. Avoid watering in the morning and evening to prevent vegetable freezing damage. Irrigation should use well water as much as possible, as the high temperature of well water can reduce physiological irritation to vegetables.
Thirdly, water according to the weather conditions, following the principle of "watering more on sunny days, watering less or not on cloudy days, and avoiding watering on windy and snowy days". When the weather changes from sunny to cloudy, the water volume should gradually decrease and the interval time should be appropriately extended; When the weather changes from cloudy to sunny, the water volume increases from small to large, and the interval time correspondingly decreases from long to short.
The fourth point is that watering should focus on the temperature differences in various parts of the greenhouse, and the amount of watering should also be different. In the southern part of the greenhouse and areas near heat sources such as stoves and flues, where soil moisture and evaporation are high, the amount of watering can be appropriately increased; The temperature on both sides and north of the greenhouse is relatively low, and the sunshine time is also short. The amount of water should be appropriately reduced.

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