2. Moisturizing, windproof and opening angle of new shoots. In order to ensure the survival of young trees, we should always keep enough water in the soil and water it once a month before the rainy season. In windy areas, young trees should be supported to prevent them from being broken by the wind. In August and September, in addition to the central leading branches, the new shoots of young trees should be leveled in time to alleviate their growth potential, so as to produce more short branches in the coming year and facilitate early fruit.
3. Prevent leafhoppers from hurting young branches. Cicadellidae, also known as big green floating dust, is mainly harmful. One is that adults suck the juice of young branches with pierced mouthparts; Second, at the beginning of September, adults cut the epidermis of branches with their sharp ovipositors and laid eggs under the skin, which made the trees seriously dehydrated and dried up. Control methods: first, spray pesticides on weeds under trees or around them to kill pests; The second is to coat the young branches with a layer of cold-proof paint mixed with pesticides before frost. You can also tie a straw handle to the trunk, which can not only prevent floating dust from laying eggs, but also prevent cold and freezing.
The main management measures in the second year after apple tree grafting are: adding fertilizer and water after grafting can promote the transportation of nutrition and water and improve the survival rate of grafting.
Trees grafted with buds in time are easy to germinate and must be erased in time to concentrate nutrition and promote the growth of new varieties of branches.
Twisting branches, pinching back branches and excessive auxiliary branches should be controlled by pinching branches or twisting branches to alleviate the tree potential and increase the number of branches.
It is not advisable to unbind in time too early, and unbind again when the new shoots are 40 cm ~50 cm long in autumn.
On the basis of strengthening management in that year, we should carefully manage apple trees in the second year:
Twisting the branchlets on the back in late May, but the number of twisting branchlets per plant should not be too many, so as not to affect the growth and expansion of the crown. Generally, for 2-year-old trees, 6-7 twisted twigs are more suitable.
Pruning upright branches can be pruned in August to promote flowering. Draw branches from about 5 cm at the base of branches, and gradually draw them to the tip, with an angle of 90 degrees every 2~3 buds. The degree of smoothing the branches is to fold without stopping.