Climatic characteristics of the solar terms of fright.

1. By the time of the fright, most parts of China have entered the busy season of spring ploughing. In most areas, the average temperature of terrorist solar terms is generally 12℃ to 14℃, which is more than 3℃ higher than that of rainy solar terms. It is the solar term with the fastest annual temperature rise, and the sunshine hours have also increased significantly. However, due to the alternation of cold and warm air, the weather is unstable and the temperature fluctuates greatly. In the Yangtze River valley area in the southeast of South China, the cold season temperature is stable above 65438 02℃ in most years, which is beneficial to the sowing of rice and corn. The average daily temperature in other areas is lower than 12℃ for more than three consecutive days, so it is not allowed to sow blindly early.

Although the temperature rises rapidly, the increase of rainfall is limited. The total rainfall in central and northwest South China is only about 10 mm, and spring drought often begins after winter drought all the year round. At this time, the booting stage of wheat and flowering stage of rape are in a period of high water demand and are sensitive to water demand. Spring drought often becomes an important factor affecting the output of Koharu. Afforestation should also consider this climate feature, plant logistics and water, and strive to improve the survival rate of saplings.

3. Thunder, which reflects the natural phenological phenomenon, refers to the sudden movement of spring thunder, which awakens the animals dormant and hibernating in the soil. At this time, the temperature rose rapidly, and spring thunder gradually appeared in most areas of the Yangtze River Basin. In most parts of southern China, the first sound of spring thunder can also be heard in the perennial rain and stormy waves; In the northwest of South China, except for a few years, it usually doesn't thunder until Tomb-Sweeping Day, which is the latest area where thunderstorms start in most parts of South China.

4. The spring is bright, and everything recovers in the shocking season. Through careful observation and accumulation of phenological knowledge, it will help to arrange farming activities according to local conditions. After the shock, everything recovers. This is the spring season, but it is also the season when all kinds of viruses and bacteria are active.