What does it mean to cut the valley with the white dew on your head?

Millennium is the15th solar term among the 24 solar terms in a year. Millennium is a very important solar term, a cold and hot feng shui ridge, so there are many agricultural proverbs and folk customs during the Millennium. "Millet cutting with white dew, jujube cutting with white dew" is a harvest scene when millet cutting with white dew. When the dates are ripe with white dew, they can be knocked down with a stick, while persimmons can only be picked at the first frost.

Solar term temperature change

The beginning of the Millennium means the end of summer, saying goodbye to the autumn tiger. After entering the Millennium solar terms, the summer monsoon is gradually replaced by the winter monsoon, and the cold air gradually moves southward frequently. In addition, the position where the sun directly touches the ground moves south, and the sunshine time in the northern hemisphere becomes shorter and the sunshine intensity weakens. At night, it is often partly cloudy and sunny, and the ground radiation dissipates quickly, so the temperature drop is gradually accelerated. There is a saying called "Qiu Qiu in a thousand years, it is cold all night." After the Millennium, the temperature difference between day and night gradually widened. Although the temperature is high during the day and at noon, it is already very cold in the morning and at night. Starting from the Millennium solar terms, according to the standard of dividing the four seasons by climatology, all localities began to enter autumn one after another. At this time, the temperature difference between day and night in China can reach 8℃- 16℃, so the Millennium is a solar term with a large temperature difference in a year.

Significance of agricultural activities

After the beginning of the Millennium solar term, the weather began to turn from hot to cold, and many crops gradually withered and matured with the increase of cold. Therefore, the Millennium world is also a busy harvest season in China. In addition, we must pay close attention to leveling the land and preparing to plant wheat. After the Millennium solar term, cold air became more and more active, and low temperature weather often appeared, which affected the heading and flowering of late rice. In this regard, we should take corresponding agricultural technical measures to reduce or avoid the harm of autumn rain, and pay attention to the prevention and control of rice blast, Sclerotinia sclerotiorum and other diseases.

Millennium phenomenon

The Millennium is divided into three stages, namely, "when the geese come, when the mysterious birds return, and when the birds are ashamed." During the Millennium solar term, the summer heat gradually disappears, the autumn air is crisp, the osmanthus fragrance is fragrant, migratory birds such as Hongyan and Swallow begin to fly south to avoid the cold, and various birds begin to store food for the winter. "Hongyan comes, Xuanniao returns." After the Millennium, migratory birds that are most sensitive to climate migrate collectively. Hongyan began to fly from the north to the south, and mysterious birds from the south also flew back to the north, and various birds began to store food for winter. There is a saying in the folk proverb: "The white dew flies in the south in the autumn night", "When beginning of autumn knows it, it makes people sleep, and the sunflower laughs in summer, and the white dew returns to the wild goose, and the osmanthus fragrance fills the garden in the autumn equinox". Therefore, migratory birds like geese are regarded as a symbol of autumn.