Every year around April 5 of the Gregorian calendar, when the bucket refers to B (or the sun yellow longitude reaches 15 degrees), it is the Qingming festival.Qingming Festival began in the Zhou Dynasty, and then merged into the Cold Food Festival and Shangsi Festival. After evolution, it is called Qingming Festival. The festival is at the turn of mid-spring and late spring. Qingming Festival is also integrated into the Cold Food Festival and Shangsi Festival, so it has two major connotations: offering sacrifices to ancestors and banquets and outings. Qingming Festival is not only a natural solar term, but also a traditional festival.
As one of the 24 solar terms in China, Qingming Festival is an important festival to guide agricultural production."February Qingming is not before, March Qingming is not after".This ancient proverb says that if the Qingming Festival is in the second month of the lunar calendar, the planting of crops should not be advanced as far as possible, that is, it should be late but not early. If Qingming Festival is in the third month of the lunar calendar, it is better to plant crops sooner rather than later, thus showing the important position of Qingming Festival in agricultural production.
　　"Before and after the Qingming Festival, plant melons and order beans".Qingming is a solar term that reflects the changes in the phenology of nature. In this season, the sun is warm, the grass grows and the air is clear. The nature presents a vibrant scene. By the time of Qingming Festival, southern China has entered a clear sky, and the earth presents the image of spring and Jingming; the northern region has also begun to melt ice and snow, and gradually entered the realm of spring returning to the earth and all things recovering. It can be said that the Qingming Festival is coming, the temperature rises and the rainfall increases, which is the good time for spring ploughing and spring planting.
　In the field crop area, rice, wheat, etc. are food crops.Qingming Festival is the key period for the northern winter wheat to enter the yield formation, and it is also the key node for the southern early rice to do a good job of sowing and raising seedlings to tillering and jointing. In this period, it is necessary to apply jointing fertilizer to winter wheat in the north, and do a good job of clearing ditches and soil moisture; pay attention to timely prevention and control of scab, powdery mildew, aphids, red spiders, etc. For early rice in the south, we should do a good job in cold prevention and heat preservation, timely transplanting, green fertilization and other agricultural operations. Pay attention to removing weeds and do a good job in field management such as field drainage and irrigation.
　In the greenhouse crop area, tomatoes, cucumbers and other economic crops.During this period, the temperature rises and the temperature difference between day and night decreases gradually; it is an important period for the rapid growth of crops such as fruits and vegetables and the accumulation of nutrients. For tomato, cucumber, cowpea and other crops, it is necessary to set up seedlings in time to prevent lodging; and it is necessary to remove diseased yellow leaves and remove deformed flowers and fruits in time to reduce nutrient consumption and improve fruit setting rate. When the temperature rises after the Qingming Festival, the rainfall also begins to increase. At this time, the prevention and control of diseases and insect pests should also be done well. The combination of agricultural control and chemical control is adopted to comprehensively control vegetable diseases and insect pests. When using insecticide, sterilization, herbicide to control diseases and insect pests and remove weeds, it is recommended to match Jiangxi XinruifengZiqiUse together.Jiangxi XinruifengZiqiIt can enhance the resistance of plants by inducing the expression of plant resistance genes; it can effectively enhance the efficacy of insecticides and fungicides and reduce the recovery time after plant damage; after the use of herbicides, it can reduce the harm caused by excessive use of herbicides.