What is the solar term?

The origin of the fright-the third of the 24 solar terms-also means that the weather will gradually get warmer. What does this fear mean? Meteorologists explained that "fright" means that the weather is getting warmer, the rain is increasing, and the spring thunder is gradually shaking, warning everything. Animals hibernating in the ground began to be unearthed, so there is a folk saying that "the quiet will come and the thunder will rise". The origin of the fright is the "fright" when the sun reaches 345 degrees on March 5 or 6 every year. Sting means that when the weather gets warmer, the spring thunder begins to sound, awakening the insects that are dormant and hibernating underground. "Twenty-four solar terms" said: "February Festival, everything vibrates, and when it vibrates, it thunders, so it is called thunder. It's an escaped cockroach. Tao Yuanming, a poet in the Jin Dynasty, said in a poem: "In the spring rain, thunder began in the east corner, and everyone was lurking and the grass was comfortable. "In fact, insects can't hear thunder. Spring is back, and the warmer weather is the reason why they end their hibernation and "run away in surprise". In China, the time when the spring thunder begins to ring varies from place to place. On the average for many years, thunder can be heard in southern Yunnan around the end of 1, and the first thunder day in Beijing is in late April. The sentence' Thunder begins with you' is consistent with the climate law in Jiangnan. " Spring thunder, everything grows ",it is a fine sunny day in September, the temperature rises and the rain increases." In addition to the winter scene in which the northeast and northwest regions are still covered in white, the average temperature in most parts of China has risen above 0℃, the average daily temperature in North China is 3-6℃, the temperature in the south of the Yangtze River is above 8℃, and the temperature in Southwest and South China reaches 10- 15℃, which is already a harmonious spring. Therefore, the working people in our country have attached great importance to this solar term since ancient times and regarded it as the beginning of spring ploughing. 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. "Agricultural proverbs also say," Spring ploughing can't rest, after the Scare Festival ","Do your best to raise bloom, and farm work will come together ". "Winter wheat in North China began to turn green, and the soil was still freezing and thawing alternately. Leveling the ground in time is an important measure to reduce water evaporation. " Being surprised without harrowing the ground is like steaming steamed bread ",which is a valuable experience of local people in fighting drought and preserving moisture." Wheat in the south of the Yangtze River has been jointing and rape has begun to blossom. There is a high demand for water and fertilizer, so topdressing should be done in time, and proper irrigation should be done in dry and rainy places. Rain in the south can generally meet the needs of vegetables, wheat and green manure crops in spring, and it is most important to prevent wet damage. As the saying goes, "It's better to dump manure than to plow wheat with three pipes" and "If you want to harvest rapeseed, you must manage plowing diligently". We should continue to do a good job in ditch cleaning and drainage. We should pay close attention to sowing early rice in South China, and at the same time do a good job in cold prevention in rice fields. As the temperature rises, tea trees gradually germinate, so it is necessary to prune and apply "germination accelerating fertilizer" in time to promote more branches and leaves and increase tea yield. Peach, pear, apple and other fruit trees should be well fertilized before flowering. "Spring thunder startled", the warm climate conditions are conducive to the occurrence and spread of a variety of diseases and insect pests, and weeds in the field germinate one after another. It is necessary to do a good job in pest control and intertillage weeding in time. "Peach blossoms bring swine fever", and attention should also be paid to the epidemic prevention of poultry and livestock.