What is the seventy-two syndrome formula?

The formula of seventy-two seasons is five days, three seasons are qi, six seasons are hours, four seasons are years old, and seventy-two seasons are twenty-four solar terms a year. Each climate corresponds to a phenological phenomenon, which is called climate response.

Among them, the plant climate should be germination, flowering, fruiting, etc. Animals should start vibrating, singing, mating, migrating, etc. Abiotic climate should include initial freezing, thawing and thunder. The time series changes of 72 climate events reflect the overall situation of climate change in a year.

Seventy-two waiting for introduction:

The existing seventy-two climaxes are compiled according to the signs of changes in natural phenomena such as animals and plants in the Yellow River basin, which are used to explain the changes in solar terms and serve as the basis for agricultural activities in the Yellow River basin.

Five days is a waiting period, and 365 days a year is 72 waiting periods. In order to correspond to the 24 solar terms, it is stipulated that three periods are one section, and there are 72 periods in a year. Weather should include abiotic and biological. The former includes water drying, easterly thawing, rainbow freezing and ground freezing. The latter includes animals and plants, such as the arrival of wild geese, tiger mating, ordinary life, bitter vegetable show, peach blossom and so on.

Although some phenological descriptions are not so accurate, there are also some unscientific elements, such as the eagle turning into a dove, the sparrow entering the water into a clam, the cool breeze before summer, the sound of dew and chilling, and so on. It still has certain reference value for understanding the farming culture of the ancient Yellow River basin.

This is a summary of the people's perceptual knowledge of the long-term practical experience of agricultural production and life in the northern Central Plains of ancient China, and it is also a civilized achievement of astronomical, meteorological and seasonal climate research in the agricultural period of the Yellow River Basin.

The above contents refer to Baidu Encyclopedia-Twenty-four solar terms? Baidu encyclopedia-seventy-two changes.