First, soil treatment. (1) Soil disinfection: The soil in the planting hole was dug up, and then 37% formalin was sprayed on the soil. After spraying, the soil was covered with a plastic film to kill the nematodes, bacteria, radioactive bacteria and fungi in the soil. (2) Soil heating: In the sunny and dry summer, late spring and early autumn air conditions, the soil is covered with a mulch to increase the soil temperature to above 50°C, which can play a role of heat sterilization. (3) Deep-turning soil change: Deep-turning can be performed in the planting hole, the soil within 0.5 cubic meters within the planting hole can be dug and removed, and the soil can be filled into the planting hole, and then the planting of the fruit tree can prevent the replant disease of the fruit tree. (4) Rotation of fruit trees: The orchards in front of peach trees can be planted with pear trees, and fruit trees such as peaches, apricots, plums, and cherries should not be planted.
Second, the application of VAM fungi. The VAM fungus, a vesicular fungal mycorrhizal fungus, is an endophytic mycorrhizal fungus that is symbiotic with fruit trees and can promote the growth and fruiting of fruit trees. When the fruit trees are planted heavily, the direct inoculation of VAM fungi in the rhizosphere of fruit trees can reduce the occurrence of replant diseases in fruit trees and promote the growth and fruiting of fruit trees.
Third, a reasonable supplement of soil nutrients. Before the planting, the soil analysis of the orchard should be carried out to determine the content of nutrients in the soil. The fertilization scheme should be determined according to the principles of balanced fertilization. The application of organic fertilizers and trace elements should be paid attention to, and the nutrients in the soil should be supplemented and adjusted.
Fourth, the application of resistant seedlings. When planting fruit trees, the use of resistant rootstock tree seedlings can effectively reduce the occurrence of replantation diseases.
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