Two points should be paid attention to in autumn management of big cherry

Early application of base fertilizer because big cherry sprouting and flowering uses the nutrition of tree storage, so base fertilizer plays a decisive role in the growth and development of trees in the following year. If the base fertilizer is applied early, it can exert the fertilizer effect in the same year and increase the nutrition reserve before overwintering. Because September is the peak of cherry root growth, which is conducive to the absorption of nutrients, at the same time, root damage can also be well recovered, which is conducive to multiple new roots. At this time, fertilization is mainly applied farm manure, phosphate fertilizer and appropriate amount of nitrogen fertilizer. The young trees are trenched and applied deeply at the projection of the crown, and the trees are combined with the ploughing and throwing of the whole garden in the full fruit period. Farm manure should be fully ripened before application, so as not to burn the roots. The amount of base fertilizer accounts for about 70% of the amount of fertilizer applied in the whole year. In the crown expansion stage, young trees generally apply 30kg of human feces and urine or 5kg of pure chicken manure per tree. In order to promote the early formation of the crown, 150 grams of nitrogen fertilizer can be applied per tree; in the full fruit stage, trees generally apply 60kg of human feces and urine or 20kg of pure chicken manure; in the early fruit stage, trees can add appropriate amount of compound fertilizer to control nitrogen, increase phosphorus and supplement potassium. Early application of base fertilizer is also beneficial to the decomposition of organic fertilizer and the release of nutrient elements. Do a good job in the prevention and control of diseases and insect pests, although the early active prevention and control, so that diseases and insect pests have been effectively controlled, but it does not mean complete eradication. There are many cloudy and rainy weather in September, and germs are easy to spread. At this time, the prevention and control of diseases and insect pests should pay attention to the rotation of drugs, on the one hand, to eliminate or alleviate the resistance of bacteria and pests to drugs, and on the other hand, to reduce the residues of certain pesticides.