1. Strengthen comprehensive management to maintain a robust tree to enhance its wintering capacity. Rational application of nitrogen fertilizer in the early stage of growth, promote its normal growth, and later (in mid-August), increase the application of phosphorus and potassium fertilizer and base fertilizer, no or less application of N fertilizer, and strictly control irrigation. Reduce soil moisture and allow the tree to store more nutrients. In the growing season, methods such as topping and twisting can control the growth in the later stage, and the saplings can enter the fruiting stage early. When cutting winter, cutting off some autumn shoots can reduce water evaporation, improve the ability of the branches to resist freezing and drought, and prevent the green leafhopper from laying eggs on the branches, so as not to cause pumping.
2, frozen water Before the soil freezes, about mid-November, the irrigation of water once, can increase the cold resistance of the tree, reduce the occurrence of pumping and freezing damage.
5份。 Animal and vegetable oil 0. 5 copies. 5 parts of the vegetable and vegetable oils.
4, bale method The branches are bundled into a bundle, and then the tree is wrapped with a straw curtain. (2) Single dry bale method. Wrap the trunk with straw or grass for larger saplings.
5, buried method (1) underground method. Gently press down the tree body and lay it flat on the ground. Use a straw rope to bundle a bundle and cover the soil directly. The thickness is 40cm. (2) Underground soil burial method. Dig trenches between rows, the size of the ditch is the degree of the overturned tree body, and the main and side branches are bundled on the center dry and placed in the ditch to cover the soil. The soil thickness is 20 cm above the ground. The buried method is only suitable for saplings born from 1 to 2a.
6. Spraying cold protection agent Spraying cmc fruit tree antifreeze, high fat film and tree coat can form a protective film on the surface of the tree to reduce transpiration and improve cold resistance. In the middle of February and mid-March, each time the cmc 150 times solution is sprayed to prevent the pumping, the effect is remarkable.
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