The origin of the first frost
Every year around Gregorian calendar 10 year 10, when the sun reaches the longitude of 2 10 degrees, it is the first frost in the 24 solar terms. The first frost is the last solar term in autumn, which is the transition from autumn to winter. There is a lot of heat dissipation on the ground in autumn, and the temperature suddenly drops below 0 degrees. Water vapor in the air directly condenses on the ground or plants to form fine ice needles, and some become hexagonal frost flowers, which are white and loose in structure.
"Twenty-four solar terms" said that the first frost: in mid-September, the gas was cold and condensed, and the dew became frost. "First frost" means that the weather is getting colder and the dew condenses into frost. In ancient China, the first frost was divided into three stages: first, the jackal sacrificed animals; Second, the vegetation is yellow; Three stings are salty. The jackal began to catch prey, sacrifice animals, and return books to heaven with animals, paving the way for sacrificing autumn gold; The leaves on the earth turned yellow and fell; The stinging insects are motionless in the cave and hang their heads into hibernation.
Overview of solar terms
One of the 24 solar terms of the first frost, the weather is getting colder and frosty. The first frost usually occurs on the 23rd day of the Gregorian calendar 10 year 10. At this time, the first frost appeared in the Yellow River basin in China, and most areas were busy planting crops such as three wheat.
In ancient China, the first frost was divided into three stages: "One stage was that the jackal sacrificed animals; Second, the vegetation is yellow; Three waiting insects are salty. " In this solar term, jackals will show their prey before eating them. The first frost occurs when the sun reaches the longitude of 2 10 degrees every year around Gregorian calendar 10 year10 23rd. The first frost said that the weather was colder and the dew condensed into frost. "Twenty-four solar terms": "In mid-September, the essence is cold and condensed, and dew cream". At this time, frost has appeared in the Yellow River Basin of China, and a silver ice crystal shines in the fields thousands of miles away. At this time, the leaves turned yellow and fell. The ancient book "Twenty-four solar terms" says: "When the frost comes, the yin begins to coagulate." It can be seen that "first frost" means that the weather is getting colder and it begins to frost. Meteorologically, the first frost in autumn is generally called "first frost" or "first frost", and the last frost in spring is called "late frost" or "final frost". The interval from the last frost to the first frost is a frost-free period. Some people also call the first frost "Chrysanthemum Frost", because chrysanthemums are in full bloom at this time, and Su Shi, a great writer in the Northern Song Dynasty, said in a poem: "All trees are sweeping away pornography, and only Furong is alone."
Frost is formed by condensation of water vapor. How can water vapor condense into frost? Lv Benzhong, a poet in the Southern Song Dynasty, wrote in Luzi IV in the Southern Song Dynasty: "The moon invades the post, and the bridge spends the night frost." Lu You wrote in Frost Moon that "the withered grass is frosty and gray, and the cold window is full of new shadows." It shows that frost appears on a clear moonlit night in autumn. There are no clouds in the autumn night, and the ground is like a quilt, which radiates a lot. When the temperature suddenly drops below 0℃, the water vapor on the ground will condense on streams, bridges, leaves and soil, forming tiny ice needles, and some will become hexagonal frost flowers. Frost can only form on sunny days. People say that "the thick frost is fierce" is the reason.
First frost custom
In some parts of China, red persimmons should be eaten in the first frost season. In the eyes of local people, it can not only keep out the cold and keep warm, but also nourish the bones and muscles. This is a good first frost food. The old man in Quanzhou said that the first frost eats persimmons: the first frost eats persimmons, and the nose will not flow. In some places, the explanation of this custom is that the first frost will eat shuttlecock on this day, otherwise his lips will crack all winter. At this time, people living in rural areas will climb tall persimmon trees and pick some bright and sweet persimmons to eat.
So what does the first cream eat for health? Today, I will tell you how the first frost keeps healthy.
How to exercise and keep fit in the first frost season?
The "first frost" is the peak of respiratory diseases, such as allergic asthma, chronic bronchitis, upper respiratory infection and so on. In order to prevent these diseases, we should first pay attention to keeping warm. People with a history of asthma attacks should pay special attention to changing clothes and wearing masks when going out to avoid the impact of colds on the respiratory tract. Secondly, we should strengthen physical exercise and increase disease resistance through exercise. Radio exercise, Tai Ji Chuan, walking, jogging and mountain climbing are all suitable exercise methods. After the first frost, it is necessary to reduce the autumn freezing, especially to keep the lower limbs warm.
Dietary health principles in the first frost season
The "first frost" has entered the late autumn, and Chinese medicine believes that this season belongs to the "gold" in the five elements, corresponding to the lungs. Therefore, at this time, diet and health are suitable for "flat supplement". Suitable foods are pears, apples, olives, ginkgo, onions, mustard greens and so on. These foods have the effects of promoting fluid production, moistening dryness, clearing away heat and resolving phlegm, relieving cough and asthma, and tonifying kidney and lung. At this time, you should eat less raw and cold food, such as sea fish, shrimp and all kinds of cold drinks. , so as not to hurt the lungs and cause disease.
After the first frost, it is usually a good time to make up. There is a saying that "mending the first frost is better than mending the winter". Mainly to keep warm and moisten the spleen and nourish the stomach. You should eat more pears, apples, ginkgo, onions and mustard seeds. Eat less cold and hard food, avoid strong * *, overeating, and pay attention to keeping your stomach warm. "There are flowers in spring and fruits in autumn". Sweet potato, sweet potato, yam, lotus root and water chestnut are all foods suitable for this season. In addition, you can eat more food such as lily, honey, jujube, sesame and walnut, which is also very healthy.
Three diseases should be prevented after the first frost.
The first frost occurs when the sun reaches the longitude of 2 10 degrees every year around Gregorian calendar 10 year10 23rd. The first frost is a solar term reflecting weather phenomena and climate change. The ancient book "Twenty-four solar terms" says: "When the frost comes, the yin begins to coagulate." It can be seen that the first frost means that the weather is getting cold and it begins to frost. With the arrival of the first frost, crops and plants began to turn yellow and shed leaves.
Astronomical experts remind that the temperature drops rapidly after the first frost. Patients with gastrointestinal diseases, hypertension and cerebrovascular sclerosis should pay special attention to avoid strenuous exercise, maintain emotional stability and ease of mind, reduce going out in the morning and evening, and try to avoid being attacked by cold air. This is an effective way to actively prevent these three diseases.
What food does ChuShuang eat?
Since the first frost, the climate has gradually cooled down. According to the viewpoint of TCM health preservation, autumn should be supplemented. As the saying goes, "it is better to make up the first frost than the winter." In autumn, you can eat more mutton and rabbit meat. Autumn is dry and easy to cough, which is also a period when chronic bronchitis is easy to recur or worsen. Here are some fruits and vegetables that can moisten the lungs.
Pear: It has the functions of nourishing body fluid, moistening dryness, clearing away heat and resolving phlegm, and can be stewed with rock sugar and Fritillaria.
Apple: It has the functions of nourishing body fluid, moistening lung, promoting digestion and quenching thirst.
Olive: It has the functions of clearing away lung heat, relieving sore throat, quenching thirst and detoxifying. Onion: It has the functions of clearing away heat and resolving phlegm, lowering blood fat and blood sugar.
Radish: It has the function of tonifying lung and relieving cough.