There are many causes of poor coloration in tomatoes, and poor coloring of tomatoes directly affects the quality of tomatoes and the price at the time of selling. In addition to the varieties of tomatoes themselves, scientific fertilization and control of temperature are also critical. Here are the causes and prevention of poor coloring of tomatoes. ,I hope to be helpful.
First, the temperature problem. The best temperature for tomato coloring is 18-26°C. In the greenhouse, when the daytime temperature is higher than 32°C, the fruit grows and matures quickly, and the formation of lycopene is hindered and affects the coloration. When the temperature is too low, it will also seriously affect the coloring of the fruit; according to the current temperature, the main cause is the greenhouse temperature is too high, the respiratory intensity is increased, which is not conducive to the accumulation of nutrients, resulting in poor coloration.
Second, excess nitrogen fertilizer. In the process of tomato growth, excessive use of nitrogen fertilizer can lead to the formation of more chlorophyll, which will inhibit the formation of lycopene and yellow or green patches on the surface of the fruit. Especially during the reddening stage, if too much nitrogen fertilizer is applied, the chlorophyll content will increase, causing the decomposition of chlorophyll to be postponed or slowed down, affecting the lycopene and carotene spotting on the fruit, thus affecting the tomato coloration. When potassium deficiency occurs, the shoulder is yellow-green, and the vascular bundle of the heart and the heart is lignified; in the absence of boron, the fruit shoulder remains green with necrotic spots.
Third, insufficient light. The coloration of tomatoes and light also have a great relationship, if the planting density is too large, it will cause mutual shade between the plants, so that the fruit can not get enough light, resulting in poor coloration of tomatoes, green shoulders, uneven coloring.
Control methods:
First, when it encounters hot weather, it is necessary to increase the intensity of air release and control the temperature of greenhouses so as to avoid poor coloration of tomatoes caused by high temperatures.
Second, the appropriate pick leaves, to avoid breathing shade, reduce nitrogen fertilizer use, increase phosphorus and potassium fertilizer and medium and small fertilizers, to avoid abnormal coloration of tomato fruit.
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