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Before bagging, you should spray “Guaguo Zhuang Ti Ling†to improve resistance, expand fruit and preserve fruit, and bag the bag within two days after spraying. The apple and pear's strong fruit fertilizer, also called summer fertilizer, will soon enter the fruit and expand rapidly. Period of application. Because at this time the fruit ends the seed development and the slow growth period of the flesh, the flesh cells enter the rapid expansion, and it is the second growth peak of the root system and the early stage of the flower bud differentiation. All three need sufficient nutrients to make the fruit development and root system. Growth and flower bud differentiation are good. Therefore, timely application of strong fruit fertilizer, to meet the nutrients required by the three, can make the fruit cells expand rapidly, significantly increase the fruit, promote the transformation of nutrients, the tree is strong, the flower bud differentiation is more and full. Therefore, this topdressing is not only a guarantee of high-quality and high-quality in the same year, but also the basis for stable production and quality in the next year. It cannot be ignored. Because the apples and pears grow more in the middle and late stages, the phosphorus needs to be more, the phosphorus is second, the nitrogen is less, and the potassium is to increase the fruit, enhance the coloring, improve the quality, make the branches thick, the branches and leaves are long, the tissues are mature, and the Photosynthetic efficiency, an important element that promotes the synthesis and transport of carbohydrates. Therefore, this time fertilization is not only NPK, but also proportional coordination, the ratio of NPK, 1.5:3.5:5 for apples and 2:3:5 for pears.
The fertilizer is preferably made from apple-specific fertilizer and pear-specific fertilizer produced by the fertilizer factory. It can also be prepared by three quick-acting fertilizers such as urea, superphosphate and potassium sulfate, according to the above ratio and the active ingredients of the fertilizer used. The amount of fertilizer applied depends on the size of the tree, the strength of the tree, the thinness of the soil, the number of results and the level of management. Generally, the tree is moderate, fertile, medium-sized, and manages to produce 60-80 kilograms of fruit in the fruit-bearing period. Each plant applies 800-1000 grams of special fertilizer or self-fertilizer, and the amount of large fruit is increased according to this amount. The number of small trees is reduced. From the underground to apply strong fruit fertilizer, and then cooperate with foliar spray fertilizer, that is, spray 300-350 times of potassium dihydrogen phosphate + melon fruit Ziling Tingling capsule every 7-10 days; supplement the tree nutrition and enhance photosynthesis It can make the fruits get nutrients supplemented in time and the nutrients obtained are comprehensive and the effect is better.
After the fruit is bagged, it is necessary to trace the strong fruit fertilizer in time.
The fruit bagging improves the coloration of the fruit, the fruit surface is smooth and beautiful, the color is gorgeous, effectively preventing the invasion of pests and diseases, reducing the pesticide residue and dust pollution, reducing the fruit burning, improving the grade and commodity rate of the fruit, and having good economic benefits.
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