How to solve the poor coloration of winter tomatoes?

After entering the winter, the phenomenon of insufficient light and low temperature becomes more and more obvious, and the impact on some vegetable crops is also quite large. Recently, according to some tomato growers, there is a problem that tomatoes are not red during the color conversion period in winter, because the coloring of tomatoes requires suitable temperature and light, which obviously cannot meet this requirement in winter. So how to solve the poor coloration of winter tomatoes? Let's take a look!

Winter tomato management

1. Insulation and warming

Temperature is one of the basic factors to ensure good coloring of tomatoes. According to the growth habits of tomatoes, the appropriate temperature during the coloring period of tomato fruits should be maintained at 24-28°C, so that lycopene can be produced in large quantities. When the temperature is lower than 12°C, it cannot be colored normally.

Therefore, in the winter season, covering quilts, straw felts, etc. can be used to increase the temperature in the shed, and strengthen heat preservation measures to avoid poor coloration of tomatoes due to temperature discomfort. In addition, some vegetable farmers excessively increase the temperature of the shed in order to promote the color change of the tomatoes. This practice is also incorrect. As the temperature rises, it will also affect the accumulation of lycopene. After the weather is warmer, do not blindly increase the temperature in the shed. Up.

Tomato coloring characteristics

2. Supplement lighting

If insulation measures such as covering quilts and straw mats are used, the cover should be uncovered as early as possible to extend the exposure time of tomatoes. The dust on the shed film should also be wiped in time to increase the light transmittance in the shed. When the tomato fruit is almost mature, the surrounding and lower leaves can be removed, and the diseased leaves should also be removed in time to increase the light of the fruit and promote the normal coloring of the fruit.

3. Supplement potash fertilizer and boron fertilizer

It is only trivial to rely on measures such as supplementing light and heat preservation to promote the color change of tomatoes. Sufficient potassium will help the color change of tomatoes. Therefore, in addition to increasing the temperature during the color change, potassium fertilizer can also be added.

Generally, potassium fertilizer can be applied with water in the early stage of tomato fruiting, applying 8-10 kg per mu each time. In addition to potassium, if the lack of boron fertilizer will also cause a lot of green back fruits in tomato fruits, you should apply boron fertilizer 0.8-1 kg per acre when applying basal fertilizer, or spray boron fertilizer when the first flower is open. It can promote even coloring of tomatoes.

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