After 7 days of national day, then we come to the cold dew season. What does the cold dew solar term mean? The autumn is crisp, the sun is beautiful and the wind is clear, and there is a slight coldness, which makes people sober. Today, let's see what the cold dew solar term means!
Cold dew is the 17th of the 24 solar terms in the lunar calendar, which belongs to the fifth solar term in autumn, indicating the official beginning of autumn; On October 8 or 9 of the Gregorian calendar, when the apparent sun reaches 195 degrees of the Yellow meridian, the temperature in most parts of southern China continues to decline. Nanling and the vast areas to the north have entered autumn, the Northeast has entered late autumn, and the Northwest has entered or will enter winter.
Cold dew refers to the cold dew that is about to condense. "Su Wen & middot; great treatise on the six yuan Zhengji": "the five Qi, the tragic order has gone, and the frost has fallen early under the cold dew." One of the 24 solar terms in China. "Tongwei & middot; deed of filial piety and economic aid to God": "on the 15th day after the autumnal equinox, fighting fingers is bitter, which is cold dew. The dew is cold and will want to condense. " At this time, the weather in most parts of China is cool.
Climatic characteristics of cold dew
Dew is traditionally regarded as a sign of the cooling weather in China. The mid autumn White Dew solar term is' dew condenses and white ', and it is' dew is cold and will condense into frost' by the time of cold dew in autumn. At this time, the temperature in most parts of southern China continued to drop, and the daily average temperature in southern China was less than 20 ℃. Even along the Yangtze River, it was difficult for the mercury column to rise above 30 ℃, but the minimum temperature could fall below 10 ℃. Except for a few Valley lowlands in the Northwest Plateau, the average temperature of climate (5 days) was generally lower than 10 ℃, measured by the standard of climatology for dividing the four seasons, It's winter. Thousands of miles of frost shop and thousands of miles of snow are very different from autumn in South China.
Cold dew and agricultural production
During the cold dew period, the rainfall in South China is also decreasing day by day. It is about 20mm in the west of South China and about 30-40mm in the East. Continuous rain is very frequent, day and night, and Ming Ming is falling, which affects the production of 'three autumn', and has become a disastrous weather in most parts of southern China. With the continuous rain, the climate is characterized by high humidity, more clouds, less sunshine, more cloudy days and foggy days. However, whether the autumn rain is serious or not directly affects the progress and quality of Sanqiu. Therefore, on the one hand, we should use weather forecast to harvest and sow in sunny days. On the other hand, we should also take various effective farming measures such as deep ditch and high compartment according to local conditions to reduce wet damage and improve sowing quality. In plateau areas, before and after cold dew is one of the most serious seasons of snow damage. Snow blocks traffic and endangers animal husbandry production, so we should pay attention to prevention.
What does cold dew eat
1. Sesame
The sesame paste made of black sesame, together with some rock sugar, can be drunk once a day in the morning and evening, which can effectively reduce the irritation of the lungs. At the same time, it can moisturize the respiratory tract and eliminate the sputum attached to the respiratory tract wall. In this way, it can moisturize the lungs and stop coughing soon, and even breathe very smoothly.
2. Crabs
The customs of cold dew in old Nanjing include eating crabs, tidying up summer clothes, etc. There is also a saying that 'cold dew hair feet, frost catch, west wind sound, crab feet itch'. As soon as the day is cold, the taste of crabs will be 'positive' It's the best season to eat female crabs. After October of the lunar calendar, it's the male crab's turn to eat the best.
3. Flower cake
As the weather is getting colder and trees, flowers and plants are about to wither, people call it 'leaving green'. When climbing in 1999, you have to eat flower cakes. Because "cake" is homonymous with "high", flower cakes use "food cake" instead of "Climbing", hoping that you or your relatives and friends can be safe, auspicious and high in Pepsi.
4. Persimmon
As a folk saying goes, 'at the beginning of autumn, walnuts, Bailu pears and cold dew persimmons have red skin.' Soft waxy persimmons are not mature until autumn. They are sweet and astringent in fruit taste and cold in nature. They enter the lungs, spleen and stomach, clearing heat and moistening the lungs. Its vitamin and sugar content is one to two times higher than that of ordinary fruits. It can nourish the lung, protect the stomach, remove dry fire. Regular consumption can tonify deficiency, relieve cough, benefit the intestines and remove heat.
5. Chrysanthemum wine
Cold dew is close to the Double Ninth Festival. At this time, chrysanthemums are in full bloom. In addition to autumn dryness, there is a custom of drinking 'chrysanthemum wine' in some areas. This custom, together with climbing, is gradually moved to the Double Ninth Festival. Chrysanthemum wine is brewed from Chrysanthemum with glutinous rice and distiller's yeast. It was called 'longevity wine' in ancient times. It has a cool and sweet taste and has the effects of nourishing the liver, brightening the eyes, strengthening the brain and delaying aging.
Generally speaking, in the cold dew season, Nanling and the vast areas to the north have entered autumn, and the first frost can be seen in most years of the capital Beijing. On the basis of balancing the five flavors of diet, diet health preservation should eat more sweet and light nourishing foods, which can not only supplement the spleen and stomach, but also nourish the lungs and intestines, and prevent dry throat and mouth.