After the fruit trees are enlarged, the nutrient consumption of the trees is empty after harvesting. Especially late-ripening apples, if the base fertilizer is not applied in time after harvesting, the tree storage nutrition is seriously deficient, not only the winter and spring rot disease multiply, but also has serious impact on the next year's flowering, fruit setting and young fruit cell formation. The inflorescence is not strong, the fruit setting rate is low, the young fruit is small, the new shoots are small and the leaves are small, and the nutrient conversion period is prolonged. The fruit farmers vividly refer to the autumn base fertilizer as "moon child fat". Just like a woman who is pregnant in October, she will give birth in a child's heart, and her heart will be exhausted. The nutrition must be replenished in a timely manner to ensure the health of the mother and child. The application of autumn fertilizer to the supply of various nutrients in the annual cycle of fruit trees should be time-oriented, rational and scientific. Fertilization time is generally from September to October. The demand for nitrogen, phosphorus and potassium nutrients in different fruit trees is proportional. At the same time, organic fertilizer should be added to supplement appropriate medium and trace elements. Fertilization method is ditch application or acupoint application; fertilization The part is on the inner side of the outer edge of the canopy; the depth of fertilization is generally distributed in the roots of 20 to 40 cm. The root application requires a shallow projection of the canopy outside the canopy. The general groove is 1.5 to 2 meters long, 0.4 meters wide and 0.4 meters deep. Fertilization in autumn can increase the fruit set rate by 8% to 10% compared with spring and winter fertilization, and increase yield. 10% to 15%. Not only that, but there are other benefits to fertilizing in the fall. First of all, the nutrients consumed by the fruit trees from the early spring germination to the flowering and fruit setting are mainly the nutrients stored in the tree in the previous year. The period from the harvest of the fruit to the time before the defoliation is the best time to accumulate nutrients. The autumn base fertilizer can increase the nutrient reserve of the tree. Secondly, autumn is the last growth peak of the root system in one year. Its life activity is strong, its ability to absorb nutrients is strong, and it is beneficial to delay leaf senescence, enhance the photosynthesis ability of autumn leaves, and increase the nutrient storage of trees. In addition, the soil temperature in autumn is higher, and the sensation is better, which is beneficial to soil microbial activities. The organic fertilizer applied is fast and easy to be absorbed and utilized by the roots. Studies have shown that fertilization in autumn can increase the effects of nitrogen, phosphorus, potassium, calcium and magnesium by 1, 5, 3, 2 and 2 times, respectively. Finally, fertilization in autumn can improve the root growth environment and improve the tree's resistance to stress. Combined with autumn fertilization and deep soil turning, it can optimize soil structure, improve soil permeability, facilitate root respiration, and improve soil water storage and fertilizer retention. Autumn Shiji Fertilizer, Winter Shiji Fertilizer, Spring Shiji Fertilizer, from the purchase of fertilizer to fertilization, are the same money and labor, but the fertilization effect received is quite different. Therefore, many experts and professors have called for the fruit of the autumn tree to be “goldenâ€, the winter base fertilizer is “silverâ€, and the spring application base is “broken copper and ironâ€. Disclaimer: Some articles on this website are transferred from the Internet. If legal rights of third parties are involved, please inform this website. phone Arm Portable CMM Arm Portable CMM Automated Precision Inc. , https://www.apiasean.com