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Early winter fruit trees must do five measures
Fruit trees need to be strengthened after the fruits are harvested and before the winter. It is crucial to grasp six managements in accordance with the practice of many years of production before the winter. The specific management content is as follows: Foliar fertilization: Before fruit trees are harvested and before defoliation, 0.5%-0.6% urea is sprayed once every half month, and 0.2%-0.4% of potassium dihydrogen phosphate or 0.3%-0.5 can be sprayed. Ammonium phosphate, to improve leaf photosynthesis. Autumn basal fertilizer: generally after fruit picking until late October. The method is to dig an annular ditch around the root of the tree and then apply the fertilizer into the ditch and then cover the soil. Generally, 100-250 kg of fertilizer is applied to each fruit tree, and 1.5-2 kg of superphosphate and 0.5-0.79 kg of available nitrogen fertilizer are mixed. Pruning topping: The fruit trees are pruned and pruned before winter shearing. The main content is to properly cut off some of the leggy branches or to pick up the heart to control the growth of branches and to promote lignification. The cultivation of weeds in orchards in the fall season will cause poor air permeability. Therefore, timely cultivating and preventing grasses after fruit harvesting and deep turning. Within the canopy, it should be turned slightly to prevent it from being wounded; deeper than the canopy expansion point, the depth is generally 40-50 cm, which enhances the permeability of the soil and is conducive to the retention of water and nutrients and the absorption of water and fertilizer by the root system. Autumn pruning: After deciduous fruit trees, timely cutting off branches, dead branches, dense branches, and inaccessible branch branches, etc., will reduce the amount of winter shear and lay the foundation for next year's fruit tree growth. Elimination of pathogens: After the fruit trees fall, they will bring their deciduous, residual fruits, weeds, and diseased branches out of the orchard to burn or bury them in order to eliminate overwintering bacteria and insect sources. The fruit trees with insect pathways were found, and 50% of the dichlorvos emulsifiable concentrate could be sucked with cotton balls and filled into the tunnel and then blocked with mud.