Poor tomato coloring
Poor tomato coloring for the following reasons:
First, uneven coloration of tomatoes is mainly due to unfavorable temperatures. The process of coloring tomato fruits is the process of chlorophyll decomposition and the formation of lycopene and carotenoids. When the temperature in the booth is too low or too high, the formation of lycopene is inhibited. In general, when the temperature in the booth is lower than 10°C or higher than 30°C, the formation of lycopene is affected. When the temperature was between 18°C ​​and 26°C, the fruit coloring was the best. When the daily temperature was above 32°C, the fruit grew and matured quickly, but the formation of lycopene was hindered and affected the coloration. Especially in Ganzhou district since the summer of June, the temperature inside the arch shed is high and lasts for a long time. At this moment, the tomato just happens to be in the process of enlargement and color transformation. The high temperature affects the formation of lycopene and causes the yellow color of the fruit surface.
Second, the effect of light on tomato coloration and light also has a great relationship, if the planting density is too large, it will cause mutual shade between plants, so that the fruit can not get enough light, resulting in poor coloration of tomatoes, appear green shoulder fruit, Uneven coloration.
Third, excessive application of nitrogen fertilizer in the tomato fruit coloring period, especially in reddening stage, the application of excessive nitrogen fertilizer, chlorophyll will increase, resulting in delayed or slow chlorophyll decomposition, affecting the formation of lycopene, carotene in the fruit, so that Affect tomato coloring. Too much nitrogen fertilizer will aggravate the formation of green shoulders in tomato fruits. At the same time, yellow-green fruit shoulders will appear if potassium is insufficient.
Prevention:
1. Into the high temperature period, the arch shed should pay attention to increase ventilation and light transmission, reduce the temperature inside the shed.
2. To maintain a certain spacing when planting, and can not be planted too dense.
3. In the fruit setting period, reduce the amount of nitrogen fertilizer application, pay attention to the use of nitrogen, phosphorus, and potassium fertilizers, and spray chitin + 0.2% potassium dihydrogen phosphate + calcium, boron, and other micro-fertilizers during fruit enlargement. Its growth is balanced.
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