How to determine the amount of fruit left in the apple tree

First, the spatial distance method is referred to as spacing method, that is, according to a certain distance to stay fruit. Experienced farmers use this method more often and are more easily mastered. The requirement is that the fruit and fruit should be determined according to the size of the different varieties of fruit. In general, Jura and Marshal are short-stem type, leaving 1 fruit every 15-20 centimeters, ie fruit pitch 15-20 centimeters; Jonagold, Qinguan and other varieties leave 1 fruit every 20 centimeters; Red Fuji, World The first class leaves 1 fruit every 20-25 cm. Of course, we must appropriately increase or decrease according to age, management level, etc. Second, the production and fruiting method is based on the species, age, vigor and cultivation management level, etc., to determine the yield per mu (also based on previous years' output); and then determine the amount of fruit left per mu based on the yield and single fruit weight. As a general fruit period apple yield per mu should be controlled at 3000-3500 kg. According to the single fruit weight, the Marshal Department of varieties (a single fruit weight of 250 grams) leaves 12,000 to 14,000 fruit; Fuji (a single fruit weight of 300 grams) contains 10,000 to 12,000 fruit. Then, based on the number of plants per acre and the growth of each strain, the number of retained fruits per plant was determined. Third, the leaf-fruit ratio method is the ratio of the total number of leaves to the total number of fruit per tree. The growth and development of fruit mainly depend on the nutrients synthesized by the leaves. In order to ensure that the fruit has sufficient nutrition, it is generally believed that the ratio of leaf to fruit is 50-60:1 for big-fruited apple varieties, 30-40:1 for small-fruited apple varieties, 30:1 for short-stemmed apple varieties, and the dwarfing anvil is 30-40:1 is more appropriate. Fourth, the fruit-and-fruit ratio method The average apple tree has 13 to 15 leaves on average. Each leaf contains 3-4 shoots, which guarantees that each fruit occupies 40-60 leaves. Therefore, the fruit-to-fruit ratio of large-fruited varieties is about 4-5:1, and the medium- and small-fruit varieties are suitable for 3-4:1. Fifth, the dry cycle calculation method is based on dry weeks to determine the appropriate amount of fruit left in the plant. The formula is y=0.025xC2. In the formula, y is the amount of fruit per plant (kg) in the moderation tree, and c is the dry length (cm) in the middle of the trunk. This formula is suitable for trees that are better managed from the early fruit stage to the fruit stage. Wang tree and weak tree can be increased or decreased based on the calculated results.

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