Young juvenile trees generally refer to young grape seedlings planted in the same year. For the seedlings to grow robustly and gain early yields, the key lies in the management of the year. Covering the mulching film to improve the early spring ground temperature, ground loose soil, a small number of chase fertilizer materials, reasonable pruning, and disease prevention and control are the main measures to increase the plant growth, enrich the shoots, achieve the second year after planting, and obtain the output. First, fertilizer and water management. After the sprouting, it is necessary to apply a small amount of urea to promote germination. The urine or urea solution was applied once every 15 to 20 days during the exhibition of 4-5 leaves, and it was applied until August and the phosphorus and potassium fertilizers were added later. After the top dressing, it is diluted and concentrated, and 25% of the people start excrement. Afterwards, 50% and 100% of the human excrement is gradually used, and 1-2 scoops of each plant are used. At the same time, it is necessary to ensure the supply of moisture during drought, and drainage should be strengthened during flooding. Second, pruning. The shaping and pruning of juvenile trees varies according to the type of cultivation. When cultivated with a double cross V-shaped frame, each shoot can be left with two new shoots. When the new shoot grows to more than 20 centimeters in length, a strong one is selected. New shoots. During the growth of new shoots, tie them up in time. When the new shoot reaches 80 centimeters or so long, it is picked up. At the tip, it is left with two auxiliary tips. When the auxiliary tip is about 50 centimeters long, it is plucked and attached to the first wire, leaving the top one secondary auxiliary tip to continue to grow and extend. The secondary tip leaves 1-2 leaves repeatedly topping, in order to achieve the purpose of supporting and increasing the thickness of the main branch. When growing on a horizontal scaffolding, the height of the new shoot can be more than 120 cm. In addition, for varieties with strong growth potential, an appropriate secondary secondary tip can be selected as the resulting mother branch. The second secondary shoot that is left as the result of the mother branch can be picked up at the 5-7 section, and the upper secondary shoot can be left with 1-2 leaves repeated topping control. After August, when the lower leaves of the plants are yellowing and aging, they should be promptly removed to improve ventilation and lightening and reduce nutrient consumption. When juvenile trees are pruned in winter, the difference in shelf style and variety should also be taken into account in cutting thickness. For example, when the fence or double cross V-shaped frame is pruned in winter, the index of cut thickness is generally about 0.7 cm. The cut length of the winter pruning of the main extension of the scaffolding is generally 0.8 cm or more. The main reason is that the shelving has a large tree shape, and raising the index of shearing roughness can reduce the amount of buds left in winter, reduce the amount of fruit left in the second year and the load of new shoots, so that adequate nutrition can ensure the prolonged growth of shoots. . For the branches on both sides of the shoots, 2-3 sections can be cut off and left as the new branch of the culture group. The base thickness should be no less than 0.7 cm, and the apex cut thickness should not be less than 0.6 cm. If the tip is too thin, it should be cut off from the base, so as not to affect the sprouting of the winter bud on the second year. Third, disease prevention and control. Young trees are mainly infected with blackpox in the pre-growth stage and downy mildew in the late August-September period. We must take the principle of active prevention and timely killing. Prevention is mainly through the use of pre-emergent limestone spray and post-growth Borneo multi-fluid protection. When the disease occurs, it is sprayed with the relevant fungicides. The commonly used fungicides are thiophanate-methyl, carbendazim, mancozeb, Cobo, World High.
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