Pear tree autumn application of basal fertilizer can enhance the cold resistance of the tree. The time of fertilization should be placed after the fruit is picked to before the leaves fall, and the earlier the better, because the new shoots of the pear tree have stopped growing at this time, and the tree consumes less nutrients . At the same time, the ground temperature is still high, microbial activities are frequent, and it is the second and third growth peaks of the pear root system. The broken roots are easy to heal and new roots are easy to develop, which is conducive to the absorption and utilization of nutrients. At this time, fertilization will help the tree body to restore its vigor, store nutrients, and also facilitate the further differentiation of flower buds. This is extremely critical for the early fruiting and high yield of young trees and high-transplanted trees.

The reasonable fertilization method for pear trees in autumn is: dig a ring-shaped trench with a width of 30 cm and a depth of about 45 cm at a place 35-45 cm away from the main stem on the slope; dig a radial trench with a shallow depth of 30-40 cm away from the main stem; 10-15 kilograms of pig manure or biogas residue, 0.5 kilograms of phosphate fertilizer, 0.5 kilograms of potassium sulfate compound fertilizer, apply more large trees and less small trees during fertilization, pay attention to mixing with soil, and avoid applying fertilizers in one place. Place. At the same time, combined with fertilization and cover soil, the pear roots are increased in soil height, and the pear trees are formed along the planting row into a tile-backed soil barrier with a width of 1.5 meters and a height of 15 cm to enhance the cold resistance of the tree.

When the autumn pears have been harvested, the pear trees enter a period of accumulation of stored nutrients. The management during this period is very important. The quality of management is directly related to the recovery of the tree and the next year's output. Therefore, in autumn, we must continue to do a good job of pear pests and fertilizer management, so as to promote the accumulation of more nutrients in the tree body and the full development of flower buds, laying a solid foundation for high quality and high yield in the coming year. It is necessary to do a good job of pest control after pear harvest. For the prevention and treatment of pear stink bugs, the medicament can be 1.8% avermectin 2000 times liquid, etc.; for pear diseases such as black spot, 80% mancozeb (Dasheng) 600-800 times liquid can be used. Scale insects mainly damage leaves, branches and fruits. After picking the fruit, use 2.5% Huifeng pyrethroid plus 40% 1500 times liquid, "new high-fat film" for prevention and control, and add leaf nutrient fertilizer for pest control. In addition, after the fruit is picked, the remaining branches and leaves, rotten fruit and weeds around the orchard should be removed in time, and the fertilizer should be concentrated or burned so that the germs and pests that harm the fruit trees have no hiding place.

Plow the pear orchard to loosen the soil and increase the permeability. It is also possible to turn the wintering pests hidden in the soil layer under the canopy out of the ground for birds to peck. Deep turning can also bury the diseased leaves and dead fruits on the ground and the pests hiding in the withered grass.

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