Describe the solar terms in Grain Rain in detail.

Grain Rain solar terms are the sixth of the 24 solar terms. Every year from April 19 to April 2 1 day, when the sun reaches 30 longitude of the Yellow River, it is regarded as Grain Rain, which comes from the old saying "Rain gives birth to hundreds of 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.

In ancient China, Grain Rain was divided into three stages: "The first stage was 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.

The solar terms in Grain Rain, which entered the solar calendar in April, are very different from those in early spring and February, although they share the word "rain". Rainy solar terms, no snowflakes flying, listening to the silent spring rain, means that the middle and lower reaches of the Yellow River began to rain. The name of solar terms in Grain Rain comes from the old saying "Rain gives birth to hundreds of valleys", which shows that precipitation in this period is extremely important to the growth of crops. But the word "valley" in Grain Rain refers not only to millet, but also to crops. The proverb "If there is no rain in Grain Rain, return it to the landlord" illustrates the importance of rain from a negative perspective.

Climatic characteristics of Grain Rain

As the saying goes, "Rain gives birth to a hundred valleys". With timely and sufficient rainfall, cereal crops can thrive. Grain Rain solar terms have such a meaning. Grain Rain season, Sichuan Basin, "young flowers fall, cuckoos cry at night, peonies bloom, and cherries are ripe. The natural scenery tells people that it is late spring. At this time, the temperature in the basin rose rapidly. Generally, the average temperature in late April has reached 20℃ to 22℃, which is more than 2℃ higher than that in mid-April, except for the northern and western parts of the basin. In the eastern part of the basin, there is often a high temperature of more than 30 degrees for a day or two, which makes people feel very hot. The low-altitude valley area in southwest Sichuan is used for entering summer.

The climatic characteristics of high temperature in spring in the basin are beneficial for Da Chun to take early measures. The suitable planting temperature of Polygonum cuspidatum is 65438 08℃ to 22℃, which can be satisfied at this time. Experience in the old arid area of the river basin proves that planting Osmunda japonica early after Grain Rain can seal vine leaves before summer drought, enhance drought resistance and obtain high and stable yield.

Grain Rain: There's a fight. The meridian of the sun is 30 degrees. It means that rain breeds grain. Because rain nourishes the earth, five grains can grow, so Grain Rain is "rain gives birth to hundreds of grains". As the saying goes, "Before and after Grain Rain, you reap what you sow".