Grain Rain significance
For Grain Rain, it is the last solar term after spring, and at this time, it is always accompanied by a long summer. In fact, when I was in Grain Rain, I began to plant some new crops in the southern region. At this time, I needed rain and dew to moisten me most.
Moreover, there will be a lot of rain in many areas in the south, and the rainfall begins to increase in April every year. In fact, the first rain basically occurs at this time of year, which is beneficial to the growth of some jade or cotton seedlings.
But if it is in South China, it will be better before and after the rain in Grain Rain. It will be directly rainy and sunny at this time. In fact, at this time, it will be harvested and used for crops in Da Chun or Koharu.
Moreover, the temperature will gradually warm up. During this time, we should pay attention to the changes of the weather and the pests and diseases of Sanmai. The temperature will start to be high in Grain Rain at this time, which will be very popular, that is, some pests and diseases will occur.
Meteorological change
Continuous spring rain is the most important feature of solar terms in Grain Rain. After the solar term in Grain Rain, the rainfall increases and the humidity in the air gradually increases, which is beneficial to the growth of crops. After entering the Grain Rain solar term, the precipitation in the middle and lower reaches of the Yangtze River and the south of the Yangtze River increased obviously, especially in South China. Once cold air meets warm and humid air, it will often form rainy weather for a long time.
The Huaihe River Basin in Qinling Mountains is basically the dividing line between the spring rain in the south of the Yangtze River and the spring drought in the north. From the Qinling-Huaihe River to the north, the spring rain decreased sharply. In the north, Grain Rain is a symbol of the "final frost". There are few cases of large-scale invasion of cold air into the south, but the cold air activities affecting the north have not stopped, and early thunder will appear in many places.