The main reason for the wilting of tomatoes after uncovering the covering materials such as non-woven fabrics on a sunny day in winter is that the soil temperature in the greenhouse is low due to prolonged cloudy days, and the root absorption capacity is weakened. When the cover is suddenly opened on a sunny day, the temperature of the air rises quickly, and the temperature of the leaves rises rapidly. The tomato leaves lose water in a large amount. However, due to the slower soil temperature rise in the roots, the water absorption capacity of the roots cannot meet the water requirements of the stems and leaves, resulting in plant loss. Excessive water is wilting. The main measure to avoid tomato wilting is to slowly raise the temperature in the greenhouse and make the difference between the heating rate of the soil and the air not too great. The specific approach is: first uncover some of the non-woven fabrics and other coverings,
After 1 to 2 hours, the rest will be uncovered and unveiled before and after noon. The appropriate standard for uncovering the quantity and timing of nonwovens and other coverings is that after the unveiling, tomatoes do not wil. For sheds that have already experienced wilting, we must first place the shades of the coverings to cool down as soon as possible to prevent the tomatoes from wilting. Second, we spray the leaves on the tomatoes to restore the leaves of the tomatoes as soon as possible. After the above measures were taken, mildly wilted tomatoes generally returned to normal, but tomatoes with severe wilting were more difficult to recover.
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