Flexible watering while watching the sky during the construction of a solar greenhouse with columns

Flexible watering while watching the sky during the construction of a solar greenhouse with columns

1. Watering flexibly depending on the weather: According to the weather conditions, master the principle of "watering appropriately on sunny days, less or no watering on cloudy days, and avoid 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 lengthened appropriately; when the weather changes from cloudy to sunny, the water volume will change from small to large, and the interval will be correspondingly shortened.

2. The watering time is appropriate. The watering of greenhouse vegetables in winter should be arranged around noon, preferably after 10 am and before 3 pm. During this time, the temperature of the shed is relatively high, which will cause side effects after watering. To avoid early morning and evening watering, to prevent sunlight freeze damage. Watering should use well water as much as possible, because the well water temperature is higher, which can reduce the physiological stimulation of sunlight.

3. Shallow water and should not be too large At low temperature, sunlight evaporation in the shed is slow, and the water demand is reduced accordingly, so the amount of watering should be small, and the interval should be longer. High humidity causes sun retting. In the first two days after watering, it is easy to cause the humidity in the shed to increase, and attention should be paid to reasonable ventilation and cooling to prevent the induction of diseases. Ventilation is generally appropriate at noon when the temperature is higher.