Around April 5th of the Gregorian calendar every year, when Douzhi B (or the Yellow Longitude of the Sun reaches 15°), is the Qingming solar term. The Qingming Festival began in the Zhou Dynasty, and was later integrated into the Cold Food Festival and the Shangsi Festival. Qingming Festival is also integrated into the Cold Food Festival and the Shangsi Festival, so it has two connotations of worshiping ancestors and feasting and outings. Qingming Festival is both a natural solar term and a traditional festival.
As one of the twenty-four 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 falls in the second month of the lunar calendar, try not to sow crops earlier, that is, it should be late rather than early; Later, it can be seen that the Qingming Festival plays an important role in agricultural production.
“Before and after the Qingming Festival, plant melons and beans”. Qingming is a solar term that reflects the phenological changes in nature. In this season, the sun is warm, the grass grows and warblers fly, and the air is clear. Tomb-sweeping day, the southern part of China has entered a state where the sky is fresh and the air is fresh, and the earth is showing the signs of spring and bright scenery; the northern region has also begun to melt the ice and snow, and gradually enters a state where spring returns to the earth and all things recover. It can be said that it is Qingming, the temperature rises, the rainfall increases, and it is a good time for spring ploughing and spring planting.
In the field crop area, rice, wheat, etc. are food crops. The Qingming Festival is a key period for the formation of yields of winter wheat in the north, and it is also a key point for the early rice in the south to do well sowing and raising seedlings to tillering and jointing. In this period, for the northern winter wheat, it is necessary to apply jointing fertilizer, and do a good job of clearing the ditch and moisture; pay attention to the timely prevention and control of scab, powdery mildew, aphids, red spiders, etc. For the early rice in the south, it is necessary to do a good job of preventing cold and heat preservation, transplanting rice seedlings in a timely manner, turning green and fertilizing 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, etc. are economic crops. During this period, the temperature rises and the temperature difference between day and night gradually decreases; it is an important period for the rapid growth of crops such as fruits and vegetables and the accumulation of nutrients. For crops such as tomatoes, cucumbers, cowpeas, etc., it is necessary to set up and support seedlings in time to prevent lodging; it is also necessary to remove diseased and yellow leaves and thin out 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, it is also necessary to do a good job in the prevention and control of pests and diseases. The combination of agricultural control and chemical control is adopted to comprehensively control vegetable diseases and insect pests. When using insecticides, bactericidal and herbicides to control pests and weeds, it is recommended to use it together with Jiangxi Xinruifeng Ziqi. Jiangxi XinruifengZiqi can enhance the resistance of plants by inducing the expression of plant stress resistance genes; when used with insecticides and fungicides, , can effectively enhance the efficacy of insecticides and fungicides, reduce the recovery time after plant damage; when used with herbicides, it can reduce the harm caused by excessive use of herbicides.