What does Xiao Man mean in solar terms?

Xiaoman in solar terms mainly refers to the grain filling of summer crops, which is gradually full, but it is only a small and full stage, and it takes some time to fully mature, so it is called Xiaoman.

Xiaoman is one of the twenty-four solar terms and the second solar term in summer. Xiaoman means that the seeds of summer crops are full, but not yet mature, just small and not yet full. It refers to the summer harvest season in which the seeds of summer harvest crops in the north are gradually full, early rice begins to head, small grains are seen on rice, and summer sowing begins in the south when the sun reaches 60 degrees on the yellow meridian from May 20 to 22 of the Gregorian calendar every year.

During the Xiaoman solar term, there is usually a lot of rainfall in southern China. Due to the active warm and humid air flow in the south, it meets the cold air from north to south in the south of China at the intersection of Huangchi and Jiao Jiao. At this time, there will often be sustained and large-scale heavy precipitation in South China, causing heavy rain or torrential rain, just like the folk saying that "the river is easy to be full".

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.

24 solar terms:

Twenty-four solar terms refer to the special festivals in the trunk and branch calendars that express seasons, phenology, climate change and establish "December construction", which were used to guide farming in the Han Dynasty.

Twenty-four solar terms are the product of ancient farming civilization, and are the knowledge system formed by ancient ancestors following the farming season and understanding the changing laws of seasons, climate and phenology in a year by observing the movement of celestial bodies. Twenty-four solar terms divide the sun's annual trajectory into 24 equal parts, each of which is a solar term, starting from the beginning of spring and ending in the great cold, reflecting the influence of the sun on the earth.

Through historical development, the lunar calendar absorbed the solar terms of the dry calendar as a supplement to the calendar, and adjusted it to conform to the tropic year through the leap method, forming a combined calendar of yin and yang, and the "twenty-four solar terms" became an important part of the lunar calendar. In the field of international meteorology, the 24 solar terms are known as "the fifth invention of China". 2016165438+1October 30th, the 24 solar terms were officially listed in the representative list of UNESCO and human intangible cultural heritage.