What is the reason why tomatoes are not easy to change color in autumn? How to promote tomato ripening?

When the temperature of tomato is 18℃ ~ 26℃, the fruit coloring is the best. When the temperature is higher than 32℃, the fruit will grow and mature rapidly. Too low temperature will hinder the formation of lycopene and affect coloring. Seriously affect the quality of fruit. When the temperature exceeds 32 degrees Celsius, lycopene cannot be produced, which causes tomatoes to turn red. Therefore, reasonable control of planting temperature can make tomatoes produce enough lycopene, thus making tomatoes turn red.

Too many fruits will not only make all fruits swell and discolor, but also cause malnutrition of the whole plant. Therefore, it is recommended to remove the fruits that are not big and not easy to be exposed to light, and the fruits that promote red should not be more at a time. Generally, it is better to have 1-2 fruits per plant. Because there are too many red fruits per plant at a time and the dosage is too large, it is easy to produce phytotoxicity. Balanced fertilization when tomatoes are ripe will also affect the discoloration speed of tomatoes. Some tomato growers used too much nitrogen fertilizer in the early stage of tomato planting, which led to more nitrogen fertilizer consumption after tomato bearing, especially after tomato ripening.

Lack of some important trace elements, such as boron, calcium, copper, molybdenum, manganese and other elements, will be detrimental to its coloring. Therefore, if tomatoes don't turn red, we should also consider whether fertilization is improper, and timely fertilization can ensure tomato height. Potassium fertilizer should be applied as base fertilizer or at the early stage of fruiting. For example, in the early stage of fruit expansion, Dianzun+energy-saving potassium can be used in combination, which can not only supplement potassium fertilizer in time.

Too close planting will lead to insufficient light and affect the coloring of tomatoes. The higher the temperature, the redder the tomatoes will be. Also, when tomatoes enter maturity, they will secrete a kind of lycopene. The more lycopene there is, the more red tomatoes will become. We should not only manage them from the mature stage, but also pay attention to a management detail of the whole process, especially the combination of light, temperature and management, in order to play a better role.