What about the freezing injury of tomatoes?

Tomato is a kind of special vegetable, which can be made into delicious dishes and eaten raw as fruit. It has a large market in our country. Tomato cultivation in China has a very long history, but there are still many problems in tomato planting, among which frost injury is more common. So what should we do about the freezing injury of tomatoes? Do you have any symptoms? How to prevent and cure it? Let's take a look at it.

1. Symptoms of frost injury

Tomato freezing injury generally occurs in winter, with the gradual decline of winter temperature, greenhouse tomatoes in winter and spring are often disturbed by low temperature. Cause the tomato to appear frostbite, after frostbite, the tomato begins to fade green in the cotyledon of the plant, and appear curl leaf phenomenon, the frostbite part changes from green to yellow. Sometimes it can cause the whole leaf to die. If it is frozen after planting, the new root is blocked, and the old root is malnourished. If it is light, it will prolong the flowering and fruiting period of the tomato, and if it is heavy, it will lead to the death of the tomato seedling.

2. The cause

The tomatoes with freezing injury are generally located at the edge of the greenhouse, and the heat preservation capacity at the edge of the greenhouse is relatively poor, so the plants are also vulnerable to freezing injury. In addition, sometimes the weather is unstable, and the soil can not be kept warm in time when the soil is cooled. As a result, the temperature in the greenhouse is lower than the range of tomato damage, resulting in plant freezing injury. In addition, if there is heavy snow in winter, the heavy snow accumulates into snow on the shed surface, which is not easy to melt, and if it is not dealt with in time, the snow produces cold air to invade the greenhouse. Resulting in a long-term low-temperature environment, the emergence of freezing injury to seedlings and other phenomena.

3. Prevention and control methods

Transform the greenhouse

When establishing the planting greenhouse, we should pay attention to ensure that there is a reasonable layout, the camber should not be too large, and conditionally use the iron frame as the skeleton of the greenhouse to improve the load capacity of the greenhouse. Then the greenhouse film in the greenhouse should be compacted with the film line, and the air and water leakage should be repaired in time. Cover the greenhouse film and then put an appropriate amount of straw felt on it to protect the greenhouse film. Then appropriately increase the amount of farm manure in the greenhouse, can effectively improve the low temperature, after entering the winter, we can use charcoal fire or ground hot line and other methods to increase the temperature.

Strengthen management

While increasing the temperature of the greenhouse, we should also do a good job of ventilation. After increasing the temperature, we should properly ventilate once to improve the air quality in the greenhouse and reduce the humidity. Water in advance before frost, do a good job of overwintering water, can appropriately increase the temperature in the shed. Then you can also use the method of smoking to increase the temperature in the shed. Combined with disease prevention, it is carried out in the greenhouse at midnight every day. The next morning, the temperature will also rise significantly.

The above is a brief introduction to the freezing injury of tomatoes. The freezing injury of tomatoes will have a serious impact on the yield, so we must pay more attention to ensure the normal growth of tomatoes and improve the planting efficiency. That's all for today's introduction. This article is for reference only. I hope it can help you all.