Why do apricot trees fall flowers and fruits?

Why do apricot trees fall flowers and fruits? What caused the apricot trees to drop flowers and fruits? Please give a detailed description of the common phenomenon of "full flowers without fruit" or "full flowers and half fruits" in apricot trees. Under normal circumstances, the natural fruit setting rate of apricot trees can only account for about 20% of the total flowers. Apricot trees have obvious three times of flower and fruit drop, because the time of each time is relatively stable, so it is called physiological fruit drop period. For the first time, after blooming, the ovary was not enlarged, and the flowers fell. Most of the flowers this time were incomplete flowers with male or female and could not complete the process of pollination and fertilization. the second time was about half a month after anthesis, when the ovary was enlarged and the diameter of the young fruit was about one centimeter in diameter. This fruit drop is mainly caused by poor pollination and fertilization; the third time in the rapid expansion period of the fruit, there is also a phenomenon of fruit drop before ripening, which is called pre-harvest fruit drop. The fruit drop is mainly caused by the lack of nutrition in apricot trees. There are many reasons for apricot flower and fruit drop, in addition to varieties, environment and cultivation conditions, it is mainly caused by the lack of nutrition in the tree. Due to the large number of apricot blossoms, it is about 10 days from the initial flowering stage to the final flowering stage, which needs to consume 110 days of nutrition accumulation in the growing period of last autumn. If the tree is malnourished during flowering, it will cause a large number of flowers and fruits. In general, the weaker the tree, the more serious the drop of flowers and fruit. Therefore, in order to prevent falling flowers and fruits and increase the rate of fruit setting, it is the key to enhance the tree potential and improve the nutrition accumulation in the tree. Several points should be paid attention to in the comprehensive management of apricot orchards: 1. Base fertilizer should be applied early. The best time to apply base fertilizer in apricot orchard is from September 20 to October 10, when pistil differentiation is at its peak (boron spraying can promote the formation of flower organs), and it is also a key period to determine the quality of flower buds, so autumn application of base fertilizer dare not be vague. Fertilizer species should be mainly those with high content of organic matter (such as Sanqin Lubao), try not to apply large chemical fertilizer, let alone urea. If the base fertilizer was not applied last autumn, about 2 kg of organic-inorganic compound fertilizer could be applied before germination or before the hard core, and the tree was coated with amino acids to supplement the nutritional deficiency of the tree. Amino acid coating rod is not synthesized through leaves, which can directly make up for the nutritional imbalance caused by excessive flowering, as well as anti-freezing and ripening effect, which can be widely popularized in apricot orchards. 2. Apricot orchards should be equipped with pollination trees. 4:1 is suitable for the ratio of main varieties to pollination trees. 3. Winter shaping and pruning should be scientific and reasonable. Do: slowly release short fruit branches, break short cone branches, retract flower branches, block fruit branches (group). In order to reduce the total flowering amount of trees, reduce consumption, concentrate nutrition, and improve fruit setting rate. Click to get more apricot planting techniques click to get more fruit planting techniques