Introduction of twenty-four solar terms in winter from solstice to solstice

Winter solstice, also known as solstice, winter festival and Asian New Year.

The solstice in winter has two meanings: nature and humanity. It is not only an important solar term among the 24 solar terms, but also a traditional folk ancestor worship festival in China. The solstice in winter is one of the eight festivals in four seasons, and it is considered as a big holiday in winter. In ancient times, there was a saying that the winter solstice was as big as a year. The custom of winter solstice varies in content or details due to different regions. In southern China, there are customs of offering sacrifices to ancestors and enjoying the winter solstice. In northern China, it is a custom to eat jiaozi from winter to Sunday every year.

The winter solstice is the 22nd solar term in the "24 solar terms", and the solar calendar reaches 270 degrees. Every year, the festival is held on 65438+February 2 1-23 in the Gregorian calendar. The solstice in winter is the extreme point of direct sunlight spreading to the south. On the solstice in winter, the sun shines directly on the Tropic of Capricorn, which is the most inclined to the northern hemisphere and the solar altitude angle is the smallest. In all parts of the northern hemisphere, the days are the shortest and the nights are the longest. The solstice in winter is also a turning point for the direct point of the sun to return to the north. After this day, it will go back.

Agricultural activities in winter solstice

Some ancient Chinese literary works divided the winter solstice into three stages: "First, earthworm knot;": Second, wait for the elk horn to solve; Waiting for the spring to gush out. " It means that the earthworm is still curled up in the soil, and the elk feels the yin gradually retreating and falling off its horns. Since the direct point of the sun returns to the north from winter to the future, the sun moves back and forth into a new cycle, the height of the sun rises from now on, and the days get longer day by day, so the spring water in the mountain can flow and be warm at this time.

Winter is a good time to build water conservancy, carry out farmland capital construction and accumulate fertilizer. At the same time, wax fertilizer should be applied to prevent freezing. In the south of China, it is necessary to strengthen the management of winter crops, clear ditches and drain water, cultivate soil to back up roots, pay close attention to ploughing the unfinished winter soil, loosen the soil, enhance the ability of storing water and preserving moisture, and eliminate overwintering pests. In the southern coastal areas where spring sowing has begun, it is necessary to do a good job in cold prevention of rice seedlings.