What should slight cold pay attention to?
Great cold is one of the 24 solar terms. Every year around 65438+10.20, when the sun reaches 300, it is a severe cold. Twenty-four solar terms: "In mid-December, I met before (slight cold)." Time-sharing, time-sharing, time-sharing and time-sharing quote three rites and meanings: "Great cold is the middle, shaped by slight cold, so it is called great ... extremely cold, so it is called great cold." At this time, the cold wave frequently goes south, which is the coldest period of the year in most parts of China. The wind is strong, the temperature is low, and the snow on the ground does not melt, showing a cold scene of ice and snow. During this period, railway, post and telecommunications, petroleum, shipping and other departments should pay special attention to take measures to prevent severe weather such as strong winds and blizzards as soon as possible. Agriculture should strengthen the cold and antifreeze of livestock and wintering crops.
In ancient China, the Great Cold was divided into three stages: "One stage is chicken milk; Second, the symptoms of bird disease; Three times, the water is strong. " In other words, in the great cold solar terms, 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.
Like slight cold, great cold is also a solar term representing the degree of cold weather. Modern meteorological observation records show that in most parts of China, severe cold is not as good as mild cold; However, in some years and a few coastal areas, the annual minimum temperature will still appear in the severe cold solar terms. In the severe cold season, the average temperature in most parts of southern China is 6℃ to 8℃, which is nearly 65438 0℃ higher than slight cold. The proverb "slight cold and severe cold, cold into a ball" shows that the severe cold solar term is also a cold period of the year. Therefore, it is necessary to continue to do a good job in the cold protection of crops, especially to protect livestock from wintering.
For some crops, a proper low temperature is necessary in a certain growth period. Wheat and rape with strong winterness need lower temperature through vernalization stage, otherwise they cannot grow and develop normally. Winter is warm all the year round in most parts of southern China. Wheat and rape sown too early tend to grow too vigorously, and jointing and bolting in advance greatly weaken their cold resistance and are vulnerable to low temperature frost. It can be seen that selecting crop varieties according to local conditions, sowing and planting in time and taking effective measures to promote and control are important links to win high yield.
Slight cold and severe cold are the periods with the least rainfall in a year. During the cold solar term all the year round, the rainfall in most parts of the south only increased slightly compared with the previous period, with 5 ~10mm in most parts of the south and only1~ 5mm in the mountainous areas of the northwest plateau. During the winter drought in South China, the water consumption is small, and the contradiction between supply and demand of farmland water is generally not prominent. However, "if you are bitter and cold, don't complain about the rain and snow. Snow is reserved for next year's wheat." In the case of scarce rain and snow, it is undoubtedly beneficial to the growth of wheat crops to water in different areas according to different farming habits and conditions.
One-year-olds are setting off firecrackers. For many years, the Spring Festival is a cold solar term. During the festival, the ice lanterns in Harbin are sparkling and beautiful, the Guangzhou flower market is colorful, and the "Tianfu" red berries are in full bloom against the cold. With the vast land of the motherland and the updated weather, people will celebrate the annual traditional festivals.
Because the Great Cold is the last solar term in a year and is connected with beginning of spring, it is slightly different from the slight cold in diet.
First of all, the amount of tonic should be gradually reduced in winter and March to adapt to the seasonal changes.
Secondly, some foods with ascending and descending characteristics should be properly added in the tonic to prepare for the ascending and descending characteristics in spring.
Finally, it should be considered that the severe cold period is a period of high incidence of respiratory infectious diseases such as colds, so it is necessary to eat more foods that warm and disperse the wind and cold to prevent the invasion of wind and cold pathogens.