If you want to have a high apple yield, the management of apple trees in spring should be done well.

The spring management of apple trees is not only the key to win the high quality and high yield of apple in the whole year, but also affects the flower bud formation of apple trees in the second year. Fruit farmers can do a good job in the spring management of apple trees from the following four aspects.

Apple tree

First, fertilizer and water management. Spring is the period of rapid growth of various organs of apple trees, and there is a great demand for nutrients, so we should follow the principle of a small number of times and topdressing in time. Before sprouting, the trunk is sprayed with 2% urea solution or the plant is sprayed with quick-acting nitrogen fertilizer to make the blossom neatly and improve the fruit setting rate. One or two weeks after anthesis, the quick-acting nitrogen fertilizer was applied again to promote the vigorous growth of new shoots of apple trees, reduce the number of physiological fruit drop in June, and increase the yield. In order to give full play to the fertilizer effect, combined with irrigation and topdressing, otherwise the sprouting period or irregular sprouting of apple trees will be delayed and the growth of new shoots will be affected. However, it should be noted that the flowering period should be properly controlled to avoid causing apple trees to fall flowers and fruits and reduce the fruit setting rate.

Second, pre-flowering management: ① pre-flowering summer scissors. For the flower branches that are not cut short in winter cutting due to indiscernibility, when the flower buds are green, make sure that the flower buds on the flower branches are fixed according to the quantity of the flower buds, leaving more strong branches, less weak branches, and sparse flowers. The sturdy flower branches can retain 5-7 inflorescences. It can also be at the blind spot. The treatment of "wearing a hat" can concentrate nutrition and improve the fruit setting rate and fruit quality of apple trees. ② eye injury pruning. For young fruit trees, a wound up to xylem is carved with a knife 0.5 cm above the flower bud in the absence of branches to stimulate the branches and supplement the space. ③ carves out the dominant buds at the top of the fruit tree. In the polarity transposition of apple branches such as qu Qiao and drawing branches, the buds of apple branches in the polar position should be carved to prevent the emergence of upright and vigorous branches on apple trees. when carving dominant buds, we should follow the principle of "more sides with less backs, strong and dense, weak and sparse, sides with more main and less sides".

Third, florescence management: ① thinning flowers and fruits. It is an important measure to adjust the balanced growth, overcome the age and improve the quality of apple. In the areas where there is no harm of late frost and there is more rain in spring, we advocate thinning flowers for apple trees and fruit thinning for fruit trees in areas where late frost damage is more frequent. The sparse flowers of apples usually leave 1 or 2 central flowers that bloom first and remove the edge flowers. For small fruit-shaped apple varieties, you can leave 2 edge flowers, and then remove the excess inflorescences if there are a large number of apples after fruit setting. If the fruit is determined by flowers, the apple varieties of large fruit type can leave an inflorescence at a distance of 20 cm to 25 cm, with 1 inflorescence and 2 central fruits in each inflorescence. However, it should be noted that in the actual process of thinning flowers and fruits, more should be left, not one-step positioning. ② increased the fruit setting rate. Because the specific conditions of apple orchards are different in different places, there are many reasons for apple trees to fall flowers and fruits. In order to ensure the yield and improve the fruit setting rate, artificial pollination, bee release during flowering or growth regulators can be used to protect flowers and fruits.

Fourth, pest control. In spring, scrape off the dead skin, old skin and warped skin from the trunk of adult apple trees and burn them centrally. Spray Baume 3-5 degrees stone sulfur mixture before the apple tree sprouts. Spray Baume 0.3% 0.5% stone sulfur mixture before flowering to eradicate the source of overwintering bacteria, reduce the occurrence of diseases, and promote tree growth.