Applying basal fertilizer in autumn to enhance the cold resistance of trees
The time of fertilization in autumn should be after fruit picking and before leaf fall, and the earlier the better. Because the new shoots of the pear tree have stopped growing at this time, the tree body consumes less nutrients. At the same time, the ground temperature is still high, microbial activities are frequent, and it coincides with 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. Fertilization at this time is beneficial to the tree body to restore tree vigor and to store nutrients; it is beneficial to the further differentiation of flower buds, which 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 shallow and deep radial trench with a depth of 30-40 cm from the main stem; 10-15 kilograms of pig manure or biogas residue, 0.5 kilograms of phosphate fertilizer, 0.5 kilograms of potassium sulphate compound fertilizer, apply more large trees and less small trees during fertilization, pay attention to mixing with soil, and do not apply fertilizers together. Place. At the same time, combined with fertilization and cover soil, the roots of the pear trees 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.
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