Is the white dew with frost a solar term?

Yes, the Millennium is the first15th solar term in the "twenty-four solar terms", the third solar term in autumn, the end of the application of the lunar calendar and the beginning of the unitary month.

"White dew" is an important solar term reflecting the growth of cold in nature. As the weather turns cold, it is sunny and hot during the day, but the temperature drops quickly after evening, and the temperature difference between day and night is large. The ancients used four seasons with five elements, and autumn was golden and golden white, so white was used to describe autumn dew.

The White Dew is the watershed of the summer heat, and "White Dew" represents the end of the summer heat. 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 hits the ground moves south, and the sunshine time in the northern hemisphere becomes shorter.

The sunshine intensity is weakened, and it is often cloudy and sunny at night. The ground radiation dissipates quickly and the temperature drops gradually. There's a saying, "It's a thousand years in autumn, and it's cold all night."

After the Millennium, the temperature difference between day and night gradually widened. Although the temperature is high at noon during the day, 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.

Millennium agricultural activities:

1, rice

The cold air in the Millennium solar terms is becoming more and more active, and low temperature weather often occurs in autumn, which affects the heading and flowering of late rice. It is necessary to guard against low temperature chilling injury and pests and diseases. When cold air invades, water can be used to keep warm, and water more than two inches before low temperature can raise the temperature by 1~2℃. When the temperature is low, shallow water can be poured in sunny days, day and night, and thick water should be poured in rainy days; Insecticide can be sprayed to prevent pests and diseases.

Step 2: vegetables

The weather after the Millennium is favorable for vegetable production, which has entered the peak season. At this time, due to the cold weather, in order to improve the survival rate of seedlings, it is best to cultivate seedlings in a greenhouse without mold cover on the ground. For open-air vegetables planted during the Millennium, it is advisable to choose vegetable varieties that like cold habitats, have suitable growth periods and can be harvested in time.