When is the once-in-22-year heavy snow?

Heavy snow is 2 1 of the 24 solar terms and the third solar term in winter. When the sun reaches the longitude of 255 degrees, the node time is 65438+February 6-8 in Gregorian calendar every year. The solar term of heavy snow is the beginning of the second month of the dry calendar, marking the official start of the mid-winter season. Heavy snow is a solar term reflecting climate characteristics. Heavy snow solar terms are characterized by a significant drop in temperature and an increase in precipitation.

"Snow" is the product of cold water vapor, representing cold and precipitation. The heavy snow solar term is a climate concept, which represents the climate characteristics during the heavy snow solar term, that is, temperature and precipitation (water vapor condensate such as rain, snow and hail falling from the sky to the ground is called "precipitation" in meteorology). Like the light snow solar term, the heavy snow solar term is a solar term reflecting the changing trend of temperature and precipitation, and it is also a reflection of ancient farming culture on festivals.

Agricultural activities in heavy snow and solar terms

Agriculture is the foundation of the world. Farming refers to farm work, and farming time refers to farming opportunities. Doing farming according to the farming season will get twice the result with half the effort. Due to the great difference in climate characteristics between the north and the south of China, the main agricultural activities in the north and south are also different accordingly. In winter, the northern region is covered with snow, so it is almost impossible to grow crops. At this time, there is little field management in the northern region, which is the slack season.

Wheat, rape and other crops are still growing slowly in southern China, so it is very important to strengthen the field management of spring flowers. During the heavy snow season, meteorological disasters such as cooling, snowstorm, freezing rain, rime and drift often occur. If it is freezing injury, it is necessary to loosen the soil, increase fertilizer, store water and heat up in time, strengthen management in the middle and late stages, and strive to minimize the loss of freezing injury.