How to grow Red Fuji Apple

How to grow red Fuji apples? What are the management methods of Red Fuji Apple? Netizens with experience in planting techniques are also asked to introduce that red Fuji apples are very popular because of their crispness, sweetness and delicacy, but red Fuji apples are a late-ripening variety, and they will not be on the market until after November, so the management cycle is longer. Therefore, the farming network sorted out the key points of the management of Red Fuji Apple, which are listed in detail below for netizens' reference. 1. Tree potential of red Fuji apple: the tree potential of red Fuji apple is generally moderate, because the chlorophyll, soluble solids content and fruit coloring index of middle tree are higher than those of weak tree and weak tree. When the ratio of the thickness of the backbone branch to the fruit branch is 25%, the fruit is large and well colored; if the thickness ratio is more than 30%, the fruit is large, but the color difference. The growth of backbone branch and fruit branch is weak, not only the fruit is small, but also the coloration is abnormal. Therefore, to maintain the healthy tree potential of the mean is very important for the production of red Fuji all-red fruit. Second, make sure the fruit trees have enough light: because the red Fuji apple is very sensitive to light. The fruit on each branch is red when the whole day light is more than 70%. When the whole day is 40% and 70%, the fruit face is partially red, and when the whole day light is less than 30%, the fruit surface is not colored. In order to ensure sufficient light conditions of the tree, heavy winter pruning should be changed to heavy summer pruning. When cutting in winter, slowly flatten the strong branches, do not cut them, and keep the number of branches per mu between 80, 000 and 100000. Summer shears should do a good job of sprouting in April and May, de-sprouting in May and June, coring, twisting and ring cutting from late May to the morning of June. In the tree shape, the natural semicircle is changed to the five-main double-layer happy shape, and the orchard with more than 83 trees per mu should be adopted. Key points: no matter what kind of tree shape, it is necessary to have few main branches, low grade, large angle, and mainly vertical fruiting branches, so as to ensure that the inner chamber of the crown is ventilated and the fruit is brightly colored. Third, regulate the proportion of mineral nutrients in leaves: when the nitrogen content of red Fuji apple tree leaves is more than 2.5% in July, the petiole is green, and the fruit is difficult to color; when the nitrogen content is less than 1.5%, the petiole and vein are purplish red, and the fruit color is light; when the leaf nitrogen content is about 2%, the petiole is purplish red, the leaf is dark green, and the fruit is well colored. It is not suitable to topdressing nitrogen fertilizer after August to before fruit harvest. At this time, topdressing potassium fertilizer can promote coloring. The higher the potassium content in the soil, the better the fruit coloring. According to the determination, when the potassium content in the soil is 0.006%-0.012%, and the potassium content in leaves is 0.5%-0.8% (full-day sunshine is up to 70%), the red Fuji apple can reach full red. Fourth, water management of fruit trees: maintain a certain amount of fertilizer and water in the early stage of fruit development of red Fuji apple, maintain a certain soil moisture in the middle stage, and control water in the later stage. In the later stage, heavy rain or flood irrigation is not conducive to improve fruit sugar content and coloring. If the climate is really dry in the later stage, sprinkler irrigation can be used. Point 5. Picking leaves, turning fruits and hanging branches of fruit trees: 20 days before the harvest of red Fuji apples, the shade around the fruit and the leaves attached to the fruit surface can be removed, which can increase the coloring area by about 15%. 4-5 days after picking leaves, gently hold the fruit by hand to turn the shady side to the sunny side, so that the back of the abdomen can see light, which can increase the coloring index by 20%. In the later stage of fruit growth, pillars and hanging branches should be set up in time to prevent fruit coloring from being affected by sagging, squeezing and overlapping contact with the ground. Point 6, fruit coloring: spraying 500 mg / kg rare earth solution when the red Fuji apple is close to coloring can make the red Fuji coloring 12: 17 days in advance, the coloring index increases by 24.2%, and the full red fruit rate increases by more than 5%. 12 pruning methods of Apple trees fertilization methods of Apple trees