Phenological characteristics of the Great Cold What are the phenological characteristics of the Great Cold?

Great cold refers to extremely cold weather. In ancient China, the Great Cold was divided into three stages: one was chicken milk; Second, the symptoms of bird disease; Three times, moist and firm abdomen. In the cold season, chicks can be hatched; Falcons such as eagles are in a state of strong predation ability, hovering in the air to find food to supplement their body energy to resist the cold; In the last five days of the year, the ice in the water has frozen to the center of the water, and it is the strongest and thickest.

The Great Cold is one of the twenty-four solar terms and the last one of the twenty-four solar terms. There is a folk proverb called freezing in the cold, which shows that the great cold solar term is also the cold period of the year. It is necessary to do a good job in the cold prevention of crops, especially in the winter prevention of livestock.

In the severe cold season, it is necessary to master the law of changes in the temperature of agricultural production, pay close attention to the forecast of meteorological departments at any time according to different years, different geographical locations and topographic conditions, and plant crops reasonably to avoid unnecessary losses.