Characteristics of fear

1. Characteristics of meteorological change: Generally, on March 5th or 6th of each year, the temperature rises rapidly and spring thunder is sprouting. According to the general climate law, the weather has begun to get warmer, with more and more rain, and most areas have entered spring ploughing. In addition to the winter scenes in which the northeast and northwest regions are still covered in white, the average temperature in most parts of the country has risen above 0℃, the average daily temperature in North China is 3-6℃, the average temperature in Jiangnan is above 8℃, and the southwest and south China have reached 10- 15℃, which is already a harmonious spring.

2. Phenological characteristics: there are three periods of fright: "When the peach blossoms first bloom; Second, wait for the sound of Cang Geng (Huang Li); Three waiting eagles turned into pigeons. " Description has entered the season of mid-spring, peach blossom red, pear blossom white, orioles blare and swallows go. According to the general climate law, the weather in all parts of the country began to get warmer, with more rain, and most areas entered spring ploughing. When all kinds of insects dormant and hibernating in the soil are awakened, eggs in winter will also begin to ovulate. It can be seen that fright is a solar term reflecting natural phenology.

3. Characteristics of farming activities: Chinese working people have attached great importance to the solar term of fright since ancient times and regarded it as the day when spring ploughing began. There is a cloud in the Tang poetry: "A light rain brings new flowers, and a thunder starts. Tian Jia was idle for a few days, and farming began. " At this time, the winter wheat in North China began to turn green, and the soil was still frozen and thawed alternately. Raking the ground in time is an important measure to reduce water evaporation.