Cultivation and Management techniques of Autumn Cherry Blossom

Autumn application of base fertilizer: generally apply base fertilizer in early September, when the fertilizer has sufficient time to mature, so that the tree can be absorbed and utilized before dormancy. At this time, the roots cut off by fertilization can more and more germinate and absorb a large number of roots, thus improving the absorption and utilization of fertilizer. The main types of fertilization are rotten farm manure, combined with a small amount of chemical fertilizer. In general, 50 to 75 kilograms of soil and miscellaneous fertilizer are applied to each young tree, and the basic fertilizer should not be too deep in autumn, and 40 to 50 centimeters is appropriate. Young trees can use ditch application method, strong trees use sprinkling method, if the tree body is found to be deficient, can be properly mixed with a small amount of trace elements.

Deep turning tree plate: before the root growth peak of cherry blossoms in autumn, combined with the application of base fertilizer, deep turning tree plate can increase the amount of deep roots, store water and preserve soil moisture, and improve the ground temperature. Clean up the dead branches, fallen leaves and weeds in the tree plate and burn them centrally, so as to eliminate the overwintering pathogen and bacteria source.

Autumn pruning: combined with the growth status of the tree, timely remove dense branches, cross branches, overlapping branches, disease and insect branches, improve the ventilation and light transmission of the crown, and enhance the tree potential. Smooth and scrape the wound with a sharp knife, disinfect it with a 5-degree solution of stone sulfide, and then apply protective agents such as tung oil to prevent wound decay.

Prevention and treatment of brown spot perforation: August-September is the peak period of the disease, the disease is serious when there is a lot of wind and rain, and it can also aggravate the disease when the tree potential is not growing well. Symptoms: the susceptible leaves initially produced purple-brown dots, and soon expanded into round spots with a diameter of about 5 mm. The edges of the lesions were almost black. In the later stage, brown mildew appeared on both sides of the diseased leaves, and dried up and fell off in the middle of the lesions. Control methods: first, strengthen cultivation management, create good ventilation and light transmission conditions, apply more phosphorus and potassium fertilizer, and enhance disease resistance. Second, remove the diseased leaves and prune the diseased branches in autumn to reduce the source of infection in the coming year. Third, spray 65% Dysen zinc 600 times or 50% carbendazim 1000 times during the onset of the disease.