A vegetable farmer in Heze City, Shandong Province, asked: The color of the shoulders of tomatoes is often abnormal, which has seriously affected the sale price. What caused it?
Yang Xiaohong: The shoulders of tomatoes are the parts of fruits that are more susceptible to external conditions. If there is a large change in dry humidity in the shed, such as dew on the fruit at night, during the day due to excessive ventilation, the amount of water evaporation is large, then the shoulders are prone to cracks, which are often called rind, the skin is thick, and the color is dark. If there are too few leaves on the top of the fruit and the fruit is exposed to sunlight, it is easy to cause sunburn and make the shoulders of the fruit white or brown. If the amount of potassium in the cultivation is insufficient, the fruit shoulder is yellow-green; if the nitrogen is insufficient, the yellow is heavy; if the boron is insufficient, it is green and is called the green shoulder fruit; if the greenhouse temperature is low, the fruit shoulder turns yellow; and if the temperature is low in winter, the nitrogen fertilizer is excessive. The decomposition of chlorophyll is slow, and when lycopene is difficult to produce, the whole fruit is brown, and the fruit shoulder is no exception. You can take corresponding measures for abnormal reasons to solve the problem of abnormal color on the shoulders.
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