What does cold dew mean? -the meaning of the twenty-four solar terms

Cold dew-the temperature drops, there is condensation in the air, and there is a chill gradually. This day is usually on 10/8 or 9 every year, 10.

Every year1October 8 or 9, when the sun reaches longitude 195, it is cold dew. "Twenty-four solar terms" said: "In September, the dew is cold and will condense." Cold dew means that the temperature is lower than that of the white dew, and the dew on the ground is colder and will soon condense into frost. In the cold dew season, Nanling and the vast area to the north have entered autumn, and the northeast and northwest regions have entered or are about to enter winter. In the capital Beijing, you can see the first frost in many years. In addition to the perennial snow on the Qinghai-Tibet Plateau, it has generally begun to snow in the northeast and northern Xinjiang.

In ancient China, the cold dew was divided into three stages: "The first stage was the swan goose; The second waiting sparrow is a clam; Three chrysanthemums have yellow flowers. " In this solar term, geese move south in a line or herringbone queue; In the cold late autumn, all the birds disappeared. The ancients saw a large number of clams suddenly appearing on the seashore. The stripes and colors of shells were very similar to those of birds, and they thought they were birds. The third stage of "Chrysanthemum begins to blossom" means that the chrysanthemum has opened in a large area at this time.

After the cold dew, the cold air in the north has a certain influence, and most parts of China are controlled by cold high pressure, and the rainy season is over. The weather is often warm during the day and cool at night, with clear skies and Wan Li, which is very beneficial to the autumn harvest. Thunderstorms have disappeared in most parts of Chinese mainland, and thunder can be heard only in parts of Yunnan, Sichuan and Guizhou. The precipitation in June 5438+ 10 in North China is generally only half or less than that in September, while in Northwest China it is only a few millimeters to more than 20 millimeters. Drought and lack of rain often bring difficulties to timely sowing of winter wheat and become one of the main limiting factors for high yield of dry land wheat.

At this time, it is still autumn rain in Hainan and Southwest China, and rainy weather will also occur in Jianghuai and Jiangnan in a few years, which will have a certain impact on autumn harvest and autumn planting.

"Cold dew doesn't pick cotton, and first frost doesn't complain." . When the weather is good, we should pay close attention to harvesting cotton. When the temperature drops early, we can take it back when the temperature is not too low. One-season late rice is about to mature in Jianghuai and Jiangnan, and double-season late rice is filling. Pay attention to intermittent irrigation to keep the fields moist.

The southern rice areas should also pay attention to prevent the harm of "cold dew wind". North China should hurry to sow wheat. At this time, in case of drought and little rain, we should try our best to accumulate soil moisture, grab soil moisture for sowing, and ensure that sowing is completed before and after the first frost. We must not passively wait for rain to lead to planting early crops and late wheat. Before and after the cold dew is the suitable sowing date for direct seeding rape in the Yangtze River basin, and the variety arrangement should be that Gan Lan-type varieties should be sown first, and then cabbage-type varieties should be sown. Those who sow green manure in the south of Huaihe River should be cleaned up, and those who have emerged should be cleaned and drained to prevent waterlogging. The tuber swelling of sweet potato in North China Plain has gradually stopped, and the probability that the morning temperature is lower than 10℃ or lower is gradually increasing. According to the weather conditions, we should pay close attention to harvesting and strive to finish it before the first frost, otherwise potato tubers will "harden their hearts" because they are frozen underground for too long, reducing the value of eating, feeding and industrial utilization, and cannot be stored or used as seeds.

Calculation of Coody Leng date [Y*D+C]-L

Interpretation of the formula: Y= two digits after the number of years, D=0.2422, L= leap year, 2 1 century C=8.3 18, and 20th century =9.098.

For example, the date of cold dew in 2088 = [88× 0.2422+8.318]-[88/4] = 29-22 = 7, 10 is cold dew.

Exception: None.

Cold dew custom

After the white dew, the weather turned cold and dew began to appear. When it comes to cold dew, there is more dew, and the temperature is lower. At this time, frost will appear in some parts of China. In the north, it is already a scene of late autumn, with white clouds and red leaves and occasional early frost. In the south, autumn is getting stronger and cicadas are dying. The custom of climbing mountains in Beijing is more prosperous. Jingshan Park, Badachu and Xiangshan are all good places to climb mountains. The Double Ninth Festival will attract many tourists.

In ancient times, dew was considered as a sign that the weather turned cold. The solar term of the Mid-Autumn White Dew is "dew condenses white", and when it is cold in autumn, it is already "dew is cold and will condense" into frost.

At this time, the temperature in most parts of South China continued to drop. The average daily temperature in South China is less than 20℃. Even in the areas along the Yangtze River, it is difficult for the mercury column to rise above 30℃, while the minimum temperature can be reduced to below 10℃. Except for a few valley lowlands, the five-day average temperature in the northwest plateau is generally lower than 10℃, which is already winter according to the standard of four seasons climate division. Thousands of miles away, first frost and Wan Li are snowing, which is very different from autumn in South China.

During the cold dew all the year round, there is abundant rainfall. zhlzw。 South China is also decreasing day by day. The western part of South China is about 20 mm, and the eastern part is generally about 30 to 40 mm. The frequent rainfall around the clock has affected the emergence of "Sanqiu" and has become a disastrous weather in most parts of South China. The climatic characteristics associated with the rain in Mao Mao are: high humidity, more clouds, less sunshine and more cloudy days, and the number of foggy days has obviously increased since then. However, whether the autumn rain seriously affects the progress and quality of "Sanqiu" directly. To this end, on the one hand, we should use the weather forecast to harvest and sow in sunny days; On the other hand, according to local conditions, we should take various effective farming measures such as deep ditch and high compartment to reduce wet damage and improve sowing quality. In the plateau area, before and after the cold dew is one of the most serious seasons of snow damage. Snow jams traffic and harms animal husbandry production, so we should pay attention to prevention.

daily life

After cold dew, with the continuous drop of temperature, cold is the most common disease. The temperature drops, the air is dry, and the pathogenicity of cold virus increases. At this time, many diseases will endanger the lives of the elderly, among which cardiovascular and cerebrovascular diseases are the most important. In addition, diseases such as stroke, recurrence of chronic bronchitis, asthma and pneumonia also seriously threaten the lives of the elderly. According to statistics, more than 90% of elderly patients with chronic bronchitis will have an acute attack after catching a cold, so comprehensive measures should be taken to actively prevent colds. In this eventful autumn, it is very important to arrange the daily life of the elderly reasonably, which plays an important role in their health.

prescribe a diet

Dietary health care should be based on a balanced diet of five flavors, and according to personal specific conditions, eat more sweet and light wet foods, which can not only replenish the spleen and stomach, but also moisten the lungs and intestines, and prevent dry throat. Fruits include pears, persimmons and bananas. Vegetables include carrots, wax gourd, lotus root, tremella and beans, fungi, kelp and seaweed. Eat warm food for breakfast, and it is best to drink hot medicinal porridge, because both japonica rice and glutinous rice have good functions of strengthening the spleen and stomach and invigorating the middle qi, such as sugarcane porridge, Yuzhu porridge, Adenophora adenophora porridge, raw porridge, Yuzhu porridge and so on. Middle-aged and elderly people and patients with chronic diseases should eat more red dates, lotus seeds, yams, ducks, fish, meat and other foods.

Cold Dew

(1) refers to the condensed Coody Leng gas. "Su Wenliu and Jacky Ji Da Lun": "Five Qi, the tragic order has been exhausted, cold dew, first frost early."

② One of the twenty-four solar terms. "Tongwei's Filial Piety: Helping God": "Fifteen days after the autumnal equinox, fighting refers to Xin, which is cold dew. The word is cold and cold, and the desire will be condensed. " At this time, the weather is cool in most parts of our country.

Cold dew agriculture

It is freezing in the cold season, and farmers are constantly idle every day.

Wheat planting is still booming, and harvesting late rice takes time.

Planting sweet potatoes is afraid of freezing injury, and soybeans are harvested in the open air.

The yellow fireworks will also be closed, and cotton picking is busy on sunny days.

Don't ignore the chemical substances to ripen the green and late-maturing cotton fields.

The key to grafting cucumber in greenhouse is heat preservation and moisture retention.

Picked purple hawthorn, red pomegranate is sour and sweet.

After the fruit is unloaded, take care of the trees, fertilize and spray soil.

Now is a good time to collect tree species, and the local provenance is the key.

Livestock and poultry breeding pays attention to technology, and pregnant females are careful.

Overwintering fish must be fattened, and adult fish should catch lotus roots.

Cold dew agricultural proverb

Men who have eaten cold meals and are single-clothed are rare.

After eating the double ninth festival meal, I didn't see a man with a light coat.

After eating Chongyang cake, the single shirt was wrapped up.

Chongyang is dry and rainy in winter.

Goose is only on September 9 and Xiaoyan is only on March 3.

In the cold season, everyone is very busy, planting wheat, picking flowers and playing beans.

Busy with wheat stubble in the morning and picking cotton in the afternoon.

Cold dew to the first frost, planting wheat does not panic; First frost to beginning of winter, relax.

It's not too late to change varieties, warm the climate and plant cold dew.

It is best not to experience the first frost.

The autumnal equinox is early and the first frost is late, which is the time for cold dew to plant wheat.

The cold dew and the first frost wheat return to the soil.

Cold dew and first frost, throw it away.

See early wheat before and after the cold dew.

If you want to grow strong, the cold dew will frost first.

Point the wheat at the cold dew mouth, order a bowl and collect three buckets.

When the chrysanthemums bloom, the wheat comes out.

Sow garlic in autumn equinox and wheat in cold dew.

Sow beans on the solstice and wheat on Chongyang in summer.

Beans on both sides of the summer solstice, wheat on both sides of Chongyang.

It seldom rains on wheat.

Wheat is watered with yellow buds, and grain is watered with bosses.

Water wheat seedlings and grain ears.

Bean sees bean, 96.

White deer valley, cold dew beans.

After the autumnal equinox, beans and peanuts are harvested by cold dew.

The cold dew of beans makes the sickle hook, and the sweet potato will be harvested in the first frost.

Bean cold dew hook, riding a frost taro.

There are no mung beans in cold dew for three days.

Soak beans to collect wheat, soak wheat to collect beans.

Cold dew, cutting late rice; First frost to cut glutinous rice.

Cotton is afraid of continuous rain in August, and rice is afraid of cold dew and frost.

The sweet potato planted is harvested early, and the frostbitten melon slices are frostbitten.

The melon was washed away by the rain and pitted like a mud pit.

Before cold dew, six or seven days, ripening agent, rapid cotton spraying.

Cold dew doesn't pick up cigarettes, first frost doesn't complain.

If you don't dig onions, it will be empty.

Don't plan 10 in September.

Don't waste your spare time. Cut the forage when you have time.

Don't worry about saving a lot of hay when cutting grass during labor breaks.

Tree species are mature in September, so don't delay the collection.

After the autumnal equinox, the cold dew comes and the seeds are collected early;

Prepare harvesting tools first, and select the tree species tag number.

Mother trees with high quality and strong age, and diseased trees cannot be eaten by insects;

Managing several tree species, local provenance is essential.

Seeds should be collected from wells with good weather, abundant sunshine and dryness;

Don't be careless in storage and preservation, it will be moistureproof if it rains continuously.

Tree cultivation should be improved, and good plants can produce good seedlings;

Men and women, old and young, work together to green their homes.

On September 9, picking pomegranates.

Cold dew harvests hawthorn, first frost the sweet potato.

Cold dew persimmon red skin, picked to go to the market.

Persimmons are as red as fire. Take them down and put them in the basket.

Pick the red ones and take them out quickly.

Cold dew persimmon skin is red.

Pick pears, don't relax, fertilize, water and dig the ground.

Pick pears, spray them quickly, and do everything possible to protect the leaves.

The leaves are well preserved this year and the fruit yield will be high next year.

If the leaves are not well protected, there will be fewer fruits next year.

Take good care of the leaves this year and bear fruitful fruits next year.

No matter what the harvest is, there will be a reduction in production in the coming year.

Whatever you collect, kill the goose that lays the golden egg.

Cold dew livestock are not idle, working overtime day and night, planting wheat quickly, and then reducing production significantly.

Mules, horses and donkeys, with night grass, are full of energy and work neatly.

No feeding at night, lazy pulling during the day.

Add ingredients at night and jump during the day.

When it is cold in the open air, catch fish and pick lotus roots.

From the cold dew festival to the freezing weather, the same kind should be merged.

Catch adult fish and sell them in the market. Don't hurt young people.