During the Qingming Festival, the plants and trees are green, the weather is clear and bright, and everything is thriving. "Qingming" is not only one of the twenty-four solar terms of the lunar calendar, but also a traditional festival that has been continued for thousands of years in my country. Qingming is also closely related to agricultural activities. There are also folk sayings about early Qingming, late Qingming, first Qingming, and later Qingming. According to meteorological experts, this year's Qingming Festival is a situation of "post-Qingming Festival".

The Qingming solar term is an important node for the full development of agricultural activities after the winter break. In "Autumn Night in Chang'an", the Tang Dynasty poet Zhang Xiaobiao wrote: "The calf blooms in spring, and the children wait for warm farming." This depicts the increasingly busy farming scene of the fields from Qingming Festival to Grain Rain. This is not only conducive to the sowing of grain crops, but also a good time for planting melons, beans, cotton and forests. Around the Qingming Festival, people acted in time and were busy farming, fertilizing, weeding and irrigating in the fields.

Before Qingming and Qingming and After Qingming

It is closely related to spring plowing and sowing

Many folk farm proverbs are also related to Qingming and farming, such as "February Qingming and Qingming and Frozen to death", "February Qingming is not before, and March is not after." Therefore, there are differences between the people's Qingming Festival in the front and Qingming Festival in the back.

Wang Chunzhi, senior engineer at the National Meteorological Center: "Qingming before and Qingming after" is actually a farmer's proverb for spring plowing and sowing, and is closely related to spring plowing and sowing. This year is "Post Qingming", which is related to the appearance of the Qingming solar term in the February and March of the lunar calendar. Usually when the cold and cold air in the north and south meet frequently in February of the lunar calendar, the temperature is unstable and the possibility of "late spring cold" is greater. But if the Qingming Festival occurs in the third month of the lunar calendar, you must hurry up. Therefore, around Qingming Festival is a critical period for spring plowing and sowing.

In the early Qingming Festival, warm and late Qingming Festival, chilly

This year is late Qingming Festival

In addition to "before and after", there is also a saying of "morning and evening" in Qingming Festival, which is determined based on the time of the Qingming Festival. If the time of the Qingming Festival is in the morning, the weather will be particularly warm after the Qingming Festival; if it is in the afternoon or evening, it may be cold for a while after the Qingming Festival. As the saying goes, "Early Qingming Festival is warm; late Qingming Festival is cold." At 20:49 on April 4 this year, the Qingming Festival officially entered, which is "Evening Qingming Festival". Therefore, it may be cold for a while after Qingming Festival, so we need to be careful of the "late spring cold".

Knowledge link

What is late spring cold?

Around Qingming Festival, agricultural production needs to prevent the phenomenon of "late spring cold". So what is "late spring cold"? If "late spring cold" occurs, how should we prevent it?

"In-spring cold" mainly occurs in March-May

"In-spring cold" is a common weather phenomenon in spring, mainly referring to the early and late warmth that occurs in March-May in spring, and the later temperature is significantly lower than normal years. When the current period is warm and the influence of strong cold air occurs in the later stage, if the daily average temperature is lower than the 30-year climate daily average temperature value reaches 1℃ or above, and the number of days lasting ≥3 days, it is determined that "late spring cold" weather will occur. On the contrary, it is just an ordinary process of cold air affecting.

Agricultural production needs to prevent "late spring cold" from affecting crop development

In fact, "late spring cold" is not only a weather phenomenon, but also an agricultural meteorological disaster. The emergence of "late spring cold" will affect the development of crops grown in spring, and in severe cases it will lead to crop death. According to meteorological monitoring, the phenomenon of "late spring cold" has occurred in Jiangxi and other places in the early stage.

Senior Engineer of Jiangxi Agricultural Meteorological Center Guo Ruige: Affected by the late spring cold, "spring frost" appears in tea gardens in mountainous areas, which affects the growth of tea buds. It is not advisable to pick tea immediately after the low temperature. It is recommended to close the garden appropriately and pick and process it after the temperature rises steadily to avoid affecting the quality of spring tea. Gaoshan tea gardens should observe the freezing situation in a timely manner and cut off frostbite branches and leaves to promote the germination of new buds and restore the tree potential.

The meteorological department predicts that during this year's Qingming Festival (April 4th to 6th), the temperature in the northern winter wheat area will be relatively high, with basically no precipitation, and the soil moisture in most areas is suitable, with high temperatures and little rain and good lighting conditions conducive to the growth of winter wheat. There is a precipitation process in central and western Jiangnan, South China, Sichuan Basin, Guizhou, Yunnan and other places, which provides certain water guarantees for agricultural production. However, strong local precipitation can easily lead to short-term waterlogging disasters in low-lying plots. It is recommended to sow spring crops or transplant early rice in time, strengthen the water and fertilizer management of seedlings and cultivate strong seedlings.