Winter nutrient storage has significant effects on the wintering of fruit trees and the sprouting, flowering, leafing, leaf spreading, rooting, fruit setting and fruit formation in the next growing season. The period from fruit harvest to defoliation is the key period for tree nutrient storage. During this period of time, the management of the tree body must not be relaxed. We must grasp the following production techniques and measures: In the early autumn, the base fertilizer should be applied as the base fertilizer. Such as compost, ring fertilizer, green manure and so on. In mid-September, 1 to 2 kilograms of soil miscellaneous fertilizer per kilogram of fruit or 0.5 kilograms of chicken manure and sheep manure per kilogram of fruit is applied, and the fertilizer is applied to a radiation groove of 30 to 40 cm depth. When applying basal fertilizer, it is advisable to mix appropriate amounts of available nitrogen, phosphorus, potassium, and boron, iron, zinc, and other trace fertilizers to increase fertilizer utilization and comprehensive nutrient levels. After harvesting fruits of early-mid-maturing nitrogen-fertilized varieties in the fall, and before harvesting the fruits of late-maturing varieties, urea was sprinkled in the tree trays at the rate of 1 kg of urea per 100 kg of fruit. More than 60% of the applied nitrogen fertilizer can be stored in the roots, which is very important for improving the nutritional storage of fruit trees. Timely harvesting and pouring fruit should be timely harvested, and harvesting will affect the nutrient storage of the tree too late. After the fruit is harvested, it should be properly watered in case of drought. Watering at this time helps the decomposition of the fertilizer and the absorption of roots, promotes the growth and development of fruit trees in the later period, and improves the nutrient storage of the tree. The practice of spraying urea before falling leaves shows that about 1% of the urea liquid is sprayed on the leaves in the first half or so of the deciduous period, which can prolong the life of the leaves, enhance the function of the leaves, and increase the photosynthetic intensity by 0.5 to 1 times. At the same time, it can also improve the nutritional status of roots, promote root development, and increase absorption capacity. The most important is to promote the reflux of nitrogen from the leaves to the tree and roots, thereby increasing the content of organic nitrogen in the tree. Strengthen the protection of the leaves After the fruit is harvested, immediately spray a fungicide with eradicating effect and an insecticide to prevent and control the leafworm and leafminer to eradicate the pests and diseases that damage the leaves, extend the life span of leaves, and enhance the photosynthetic efficiency of leaves. To achieve the purpose of increasing the nutrient accumulation of the tree.
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