A vegetable farmer in Heze City, Shandong Province asked: The shoulder color of tomatoes is often abnormal, which seriously affects the selling price. What is the cause?
Yang Xiaohong A: The shoulder of tomato fruit is the part of the fruit that is more susceptible to external conditions. If the dry humidity changes greatly in the shed, such as dew on the fruit at night, the air is evaporated too quickly during the day, and the water is evaporated. The shoulder is prone to cracks. It is often said that the skin is thick and the color is dim. If the leaves are too small in the upper part of the fruit, and the fruit is exposed to the sun, it is easy to cause a daily burning disease, so that the shoulders are white or brown. If the amount of potassium in the cultivation is insufficient, the shoulder is yellow-green; if the nitrogen is insufficient, the yellow is heavy; if the boron is insufficient, it is green, called the green shoulder; if the shed is low, the shoulder becomes yellow; if the temperature is low in winter, the nitrogen is excessive. The chlorophyll is slowly decomposed, and when the lycopene is difficult to form, the fruit is brown in color, and the fruit shoulder is no exception. You can take corresponding measures for abnormal reasons to solve the problem of abnormal color of the shoulder.
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