What does xiaoman solar term mean?

The name Xiaoman has two meanings. First, it is related to climate and precipitation. Small full solar terms, heavy rain began to increase in the south, frequent precipitation; As the saying goes, "small and complete, the rivers are getting full." The "fullness" in Xiaomanli refers to the excess rain. The second is related to agricultural wheat. The northern region is full of solar terms and little or no rain. This "fullness" does not refer to precipitation, but to the fullness of wheat. ?

When the solar terms are full, there will be more and more rainfall in the southern region; Warm and humid air from the ocean is active and meets cold air from north to south. At this time, there will often be sustained and large-scale heavy precipitation in South China, causing heavy rain or torrential rain.

Jiangnan area, are often rivers and lakes. If there is little rain at this stage, it may be that the Pacific subtropical high is weak and located in the south, which means that it is Huangmei season. In the north, there is little or no rain in the solar terms, during which the temperature rises rapidly and the temperature difference with the south further narrows.

Phenological phenomena of solar terms in Xiao Man

Wu Cheng, a scholar in Yuan Dynasty, edited Twenty-four Solar Terms. According to the scenery around the Yellow River Basin and the characteristics of the twenty-four solar terms, he divided the twenty-four solar terms into "seventy-two periods", and each solar term was divided into three periods. Xiaoman waited three times: "Wait for the bitter vegetable show, wait for the grass to wither, and wait for the wheat autumn."

In other words, after the full solar terms, bitter vegetables have flourished; After that, some soft grass with shady branches began to die in the strong sunlight; In the last period of Xiaoman, wheat began to mature. The third period was originally written about the summer solstice, and later some works were changed to the winter solstice of wheat. Although it is still summer, it is a mature "autumn" for wheat.

Summer is the season when winter wheat ripens in the north, and autumn is the season when grain ripens, so the ancients extended the term early summer to wheat autumn (the season when wheat ripens).

Refer to the above? Baidu Encyclopedia-Xiao Man