Practical vegetable frost protection technique tutorial for low temperatures, with the latest methods explained in detail

After entering winter, vegetables are highly susceptible to frost damage, and freezing in particular has a huge impact on vegetable yields. If you want to grow vegetables well, cold and frost protection measures are essential. How can vegetables be kept safe, and doing a good job of low-temperature frost protection becomes extremely important. Let's learn about it together below.

1. Remove covers late and put them on early

On sunny days, greenhouse vegetables should be ventilated to harden the seedlings, with covers removed late and put on early, and ventilation done for a while around noon to promptly release harmful gases such as ammonia out of the greenhouse. During continuous rainy days, after long cloudy periods that suddenly turn sunny, or when sunny weather follows snowfall, the covers must not all be removed at once. They should be removed in time to let the plants slowly adapt to the environment, which is beneficial for healthy vegetable growth. To prevent frost damage, it is also necessary to keep the greenhouse film clean, increase the transparency of the film, increase light, and raise the greenhouse temperature.

2. Fertilizing and hilling soil

Intertilling, hilling soil, and fertilizing is a specialized technique for vegetable frost protection. Generally, fully decomposed farmyard manure can be applied around the root zone of the vegetables, which can loosen the soil, raise the ground temperature, and protect the vegetable root system. Especially for low-lying plots, ditches should be dug well around them to ensure the ditches are unobstructed, so that standing water can be drained promptly after winter rain and snow. After rain and snow, promptly clear the accumulated snow on the greenhouse to prevent the snow from crushing the greenhouse.

3. Control nitrogen fertilizer

Too much nitrogen fertilizer should not be applied to vegetable seedlings, because seedlings have poor cold resistance. Therefore, before low-temperature frost damage arrives, a 0.2% potassium dihydrogen phosphate solution can be sprayed on the leaves 2-3 times. Plant ash can also be spread once on the production field surface, which can prevent cold and resist freezing, increase nutrients, and also has an excellent effect on preventing root rot in production. In addition, winter irrigation water must be watered sufficiently and thoroughly, so that the vegetables in the field can safely overwinter.

4. Strengthen covering

Before low-temperature frost damage arrives, open-field vegetables need to be covered with straw, plastic film, cloth, etc. Greenhouse vegetables require the greenhouse supports to be reinforced in advance, the greenhouse film pressed tightly, and a multi-layer covering method adopted, with small and medium-sized arched sheds added inside the greenhouse, plus film, straw curtains, or non-woven fabric, which can greatly increase the growing temperature of the vegetables and reduce heat loss.

The above is an introduction to low-temperature frost protection techniques for vegetables. We hope it can help you. To learn more related knowledge, please stay tuned to us.