Key points of management of peach trees in winter

1. Fertilization in winter

1. Winter turn. Winter turning can make the soil loose, enhance soil permeability, improve soil physical and chemical properties, create good environmental conditions for the growth of peach trees, and effectively control the base of diseases and insect pests. Young trees can be turned deeply under the crown and about 1 meter outside the vertical part of the crown, expanding year by year until they are connected. The depth of deep turning should be 20-30 cm. The big tree can be turned deep in the whole garden after applying base fertilizer. Attention should be paid to being shallow near the trunk and deep away from the trunk.

2. Fertilization. The main types of fertilizers are slow-acting mature organic manure, including mechanized organic fertilizer and self-composting farm livestock fertilizer and so on. The amount of fertilization varies according to tree age, growth, and growth conditions, but the amount of base fertilizer should account for more than 60% of the total amount of fertilizer applied in the whole year. The main way of fertilization is ditch application, deep 40cm and wide 30cm are opened on both sides of the vertical ground around the peach crown, ditches are opened around the crown, and the fertilizer is applied to cover the soil.

Winter pruning

1. Pruning of young trees. The pruning of young trees is mainly to expand the crown and lay a good tree-shaped foundation for high yield in the future. Pruning should be in accordance with the requirements of the tree shape, look at the tree pruning, select, equip and cultivate main branches and side branches according to local conditions, and leave more auxiliary branches and fruiting branches appropriately. At the same time, the angle and growth of the main and lateral branches should be adjusted in time according to the requirements, so that they can distinguish between the primary and secondary, and each occupy the space they should occupy.

2. Pruning of fruit trees. After 5-6 years of planting, peach trees began to enter the full fruit stage. The main task of pruning is to maintain the balance of tree potential in various parts, adjust the balance of growth potential of main branches and lateral branches, cultivate and renew branch groups, and prevent premature senility and inner cavity emptiness.

Third, pest control.

1. Clear the garden. The peach tree branches, peach bags and scraped old skin cut off in winter should be cleared out of the peach orchard and treated centrally to effectively control the base number of diseases and insect pests.

2. Medication. After winter pruning, Baume 5 degree stone sulfur mixture and 0.3% pentachlorophenol sodium were sprayed to control overwintering diseases and insect pests.

3. Whitewash. The whitening agent is made of quicklime 1 kg, water 3-5 kg and salt 2 tablespoons. The preparation method is as follows: first adjust the quicklime into a paste with water, then dissolve the salt with a small amount of hot water and pour it in, and then add water to the adhesion that is not easy to be brushed.