Precocious Apple Postharvest Management

Early harvesting of apple is an important stage for the storage of nutrients by photosynthesis of tree leaves, and it is also an important period for pest control. In flowering, fruitless fruiting, less fruitless fruiting, severe physiological fruiting, and malformed fruit are all closely related to tree nutrient deficiency and postharvest pest damage. Therefore, pruning, fertilizing, and controlling pests should be carried out promptly after harvest in order to restore tree vigor, increase nutrient accumulation, and reduce the number of disease and insect overwintering bases. This will lay a foundation for the next year's flowering results and stabilize yield and yield. The specific measures are as follows:

Postharvest pruning

Post-harvesting requires timely pruning to control shoot growth and promote strong trees. Pruning is mainly based on thinning, retraction, topping, and strong pulling. For useless branches and long branches, long consumption branches with multiple heads and pests and branches cut off; after the result, the weak branches are properly retracted; take up the heart and twist the branches for the long branches with growth space; pull the angle inappropriately. The branches allow the fruit trees to be air and light, save nutrition, reduce consumption, and promote flower bud differentiation.
Fertilizer management

As a result of the flowering of fruit trees, a large amount of nutrients are consumed, resulting in extreme weakness of the trees. After the fruit is harvested, nitrogen, phosphorus and potassium quick-effect fertilizers should be added in time, organic fertilizers should be added, and water should be supplemented appropriately. At this time, fertilization, high soil temperature, microbial decomposition activities, strong root absorption capacity, can quickly make up for tree nutrient deficiency, and accumulate nutrients for the next year's high yield. The amount of fertilizer to be applied should be about 60% of the total nutrient requirement of fruit trees throughout the year. The total amount of nutrients needed for fruit trees is determined according to age, tree vigor, yield, and type of fertilizer. The general principle is to produce 100 kg of fruit and need 100 to 200 kg of farm organic fertilizer, 1 kg of pure nitrogen, 0.5 kg of pure phosphorus, and pure potassium. 1 kg to calculate.

Pest Control

After pest control, the purpose is to ensure the healthy growth of the leaves. The leaves are the processing plants for fruit tree nutrition. The trees are supported by leaves and the leaves depend on the leaves. It is particularly important to protect the leaves. The main pests and diseases at this stage were brown spot, anthrax, ringworm, rot, borer, red spider, and leaf leaf moth. Failure to prevent and control in time will cause damage to fruit trees and lead to early defoliation. Therefore, it should be based on the occurrence of diseases and symptoms symptomatic medication. The bactericide can be selected from chlorpromazine, polyoxin, Bordeaux, M-45 or Mancozeb. Insecticides and acaricides can be selected from kungfu, diflubenzuron, Peach Xiaoling, and Qiqisu. After scraping the lesions from the rot, the bacteria can be wiped with 50 to 100 times liquid or smeared with copper humate as a rejuvenating agent.

Orchard growing grass

After the no-till orchard is harvested, white clover and alfalfa can be planted to improve the soil, fertilize the soil, adjust the temperature and humidity of the orchard, and increase the permeability of the soil. At the same time, it can also fix nitrogen in the air and reduce the amount of fertilizer. Eliminating soil farming is a new technology that is adapted to simplify management.

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