The origin of Grain Rain in the 24 solar terms and the introduction of Grain Rain solar terms
The Origin of Grain Rain in the Twenty-four Solar Terms
According to Huai Nan Zi, creating characters in Cang Xie is an earth-shattering event. In late spring and early summer, the Yellow Emperor issued imperial edicts, announcing the success of Cang Xie's ci-creation, and calling on people all over the world to aspire to * * * Xi. On this day, there was an unusual rain, and countless Gu Mi fell as comfort. Later generations named this day's Grain Rain as one of the 24 solar terms, which is now the "Grain Rain" solar term.
But among the people, there is a story circulating in Guanzhong, Shaanxi Province: It is said that more than 4,000 years ago, Huangdi in Xuanyuan urgently needed a historian in charge of historical materials. One day, the Yellow Emperor discovered Cang Xie with both ability and political integrity and appointed Cang Xie as a historian. He remembered the important events of the country clearly by tying knots, which was very appreciated by the Yellow Emperor. Later, the knot notes became more and more backward. Once, Cang Xie went out hunting with a hunter. The hunter pointed to the traces of various wild animals left on the ground and told the whereabouts of wild animals. Cang Xie was deeply inspired: "A footprint represents a thing!" After returning home, Cang Xie packed up and went out for a trip. He climbed mountains and waded, was not ashamed to ask questions, and expressed everything he saw according to its characteristics. Pictographic by class, original text. Because of his contribution to word-making, he touched the Emperor of Heaven. At that time, there was a famine in the world, so he ordered the heavenly soldiers to open the granary of the Heavenly Palace, and millet was planted, and all the people in the world were saved.
After Cang Xie's death, people buried him in the north of Shiguan Town, Baishui County, his hometown. There is a couplet engraved at the entrance of the tomb: "Su Yu felt the emperor of heaven in those days, and the same text matches the bridge Lingyong." People set the day of offering sacrifices to Cang Xie as the day of Grain Rain, which is now "Grain Rain Festival". Nowadays, every Grain Rain Festival, there is a temple fair in Shiguan Town, Baishui County to worship Cang Xie.
Introduction of solar terms in Grain Rain
"The catkins are dancing with the wind, and the rain is coming." In this festival, the willow Xu Fei falls, the cuckoo cries at night, the peony spits out, and the cherry ripens red, which is the best time for everything to grow. Grain Rain is the sixth solar term among the 24 solar terms and the last solar term in spring. Every year from April 19 to April 2 1 day, when the sun reaches 30, it is Grain Rain, which comes from the old saying "Rain makes a hundred valleys". At the same time, it is also the best time for sowing, transplanting and ordering beans. According to meteorologists, Grain Rain is the last solar term in spring, and the arrival of Grain Rain solar term means that the cold wave weather is basically over and the temperature rises faster, which is very beneficial to the growth of cereal crops.
What season does Grain Rain belong to?
Grain Rain is the last solar term in spring. At this time, just after planting seedlings and planting new crops in the field, rain is most needed, so there is a saying that "spring rain is as expensive as oil". At this time, the eastern part of most parts of South China is abundant with rainfall of about 30 to 50 mm in late April of the year. The first heavy rain usually occurs during this period, which is beneficial to rice planting and the growth of corn and cotton at seedling stage.
Grain Rain Sanhou
In some ancient works of China, Grain Rain is divided into three stages: "The first stage is when Ping was born; The second time, pigeons blow feathers; The third is that Dai Sheng fell to Sang. " After Grain Rain, rainfall increased, duckweed began to grow, then cuckoo began to remind people to sow, and then Dai Sheng birds began to be seen on mulberry trees.
What has happened to the climate in Grain Rain?
After the solar term in Grain Rain, the most obvious change is the increase of rainfall, and the humidity in the air is gradually increasing. At this time, the humid air became a hotbed of bacteria. Therefore, health care should follow the changes of natural solar terms, adjust according to its climatic characteristics, and prevent colds. At the same time, due to the warmer weather, people's outdoor activities have increased, and peach blossoms and apricot blossoms have opened in the northern region: catkins and catkins are flying all over the sky. In Grain Rain season, when the rainfall is sufficient and timely, cereal crops can thrive. When we entered Grain Rain, it was already late spring. At this time, the temperature in the south rose rapidly, reaching 20℃ to 22℃, which was more than 2℃ higher than that in the middle, except for parts of northern and western South China. In the eastern part of South China, there is often a high temperature of more than 30 degrees for a day or two, which gradually makes people feel the heat in summer.
The climate characteristics of high temperature in south China in spring are beneficial to the early cropping cultivation measures in Da Chun. The suitable planting temperature of Polygonum cuspidatum is 18℃~22C, which can be satisfied at this time. The experience in the old arid areas in southern China has proved that planting Osmunda japonica early in Grain Rain can seal vine leaves before summer drought, enhance drought resistance and achieve high and stable yield.