Is there a scientific basis for Zhu Kaishan's burning straw to resist frost in Dongdu? Is there such a thing as frost resistance in Northeast China?

There is a scientific basis for burning straw to resist frost. There is a folk custom of burning straw to resist frost for the following reasons:

1, the formation of frost is due to the high air temperature and the low surface temperature of ground objects. When hot air meets cold objects, air moisture precipitates, and when the temperature drops below 0 degrees, ice crystals form on the objects.

2. Burning corn stalks will raise the temperature near the ground, and the smoke formed by burning will become a smoke layer in the crop field, and the heat radiated from the ground will be reflected back, just like covering a quilt.

3. After burning the straw, it promotes the air flow near the ground objects. Air flow also has an effect on the formation of frost. When the air flows slowly, the hot air is in full contact with the surface of cold ground objects, which is easy to precipitate water vapor and form frost. However, after burning straw, the air flows quickly and the contact time with cold ground objects is short. The upper hot air formed by straw burning is mixed with the lower air on the surface of cold objects, which is not conducive to the temperature reduction, so it is not conducive to the formation of frost.

Extended materials:

The harm of frost to crops, etc. According to its characteristics, the following defensive countermeasures should be taken in areas with more frost disasters:

1. Arrange planting plans according to different topography and soil quality, and arrange varieties with strong frost resistance in places prone to frost. The farmer's proverb "Frost hits the snow and sinks" shows that low-lying areas are prone to frost and it is serious. The more occluded the terrain, the greater the frost damage.

2. Taking comprehensive cultivation measures to reduce frost disaster and watering algae wheat fields is the most ideal frost prevention method at present. Because watering can not only slow down the temperature, but also promote the growth of wheat and enhance the cold resistance. According to the weather forecast, temporary smoking, field spraying or blast can also achieve the purpose of frost prevention.

3. The historical experience of post-disaster remedy proves that before flowering, the stems and leaves on the ground can't be replanted if they freeze to death. After wheat is damaged by late frost, it is forbidden to sweep the frost with ropes, not to mention mowing, raking or grazing to freeze the stems and leaves. The correct remedy after frost should be topdressing and watering in time to promote the early recovery of affected wheat seedlings and reduce the loss of frost disaster.

References:

Baidu encyclopedia-frost