The latest course on the techniques and methods of low temperature Anti-freezing of vegetables

After entering winter, vegetables are extremely vulnerable to freezing damage, especially freezing has a great impact on the yield of vegetables, in order to grow vegetables, cold and anti-freezing measures are essential, how to make vegetables safe to read, do a good job of low-temperature anti-freezing measures is extremely important, the following and the editor to understand it.

1. Uncover the cover late and early.

On sunny days, vegetables in the greenhouse should pay attention to release the wind to refine the seedlings, uncover the cover in the evening, ventilate for a while before and after noon, and discharge ammonia and other harmful gases out of the shed in time, when it is cloudy, rainy and sunny for a long time, or when it is sunny after snowfall, the mulch cannot be opened all at once, but should be opened in time to let the plants slowly adapt to the environment, which is conducive to the healthy growth of vegetables. To prevent frost injury, it is also necessary to keep the greenhouse film clean, increase the transparency of the film, increase the light, and improve the temperature of the greenhouse.

2. Fertilizing and cultivating soil

The professional technology of vegetable anti-freezing during mid-ploughing and soil fertilization can generally be applied with rotten farm manure in the vegetable rhizosphere, which can loosen the soil, increase the soil temperature, and protect the vegetable root system. Especially for the low-lying land, it is necessary to dig a good ditch system around to ensure that the ditch is unobstructed, so that the stagnant water can be removed in time after the rain and snow in winter, and the snow on the greenhouse can be removed in time after the rain and snow, so as not to collapse the greenhouse under the pressure of snow.

3. Control nitrogen fertilizer

The seedlings of vegetables can not apply too much nitrogen fertilizer, because the cold resistance of the seedlings is poor, so 0.2% potassium dihydrogen phosphate solution can be sprayed on the leaves 2-3 times before the cold injury. Plant ash can also be applied once on the production surface, which can not only prevent cold and cold, but also increase nutrients, but also play an excellent role in preventing root rot in production. In addition, winter irrigation must be fully watered, so that vegetables in the field can survive the winter safely.

4. Strengthen coverage

Before the low temperature freezing injury comes, it is necessary to cover the open field vegetables with rice straw or plastic film, cloth and so on. The greenhouse vegetables should strengthen the greenhouse support in advance, press the greenhouse film, adopt the method of multi-layer covering, and add small and medium-sized arch sheds in the greenhouse. cover with film, straw curtain or non-woven cloth, which can improve the growth temperature of vegetables and reduce heat dissipation.

The above is the introduction of low-temperature anti-freezing technology of vegetables. I hope it can help you. If you want to know more about it, please follow us.