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Fruit trees with caution to use fertilizers
Suspended fertilizer is the process of letting nutrients enter the interior of the tree automatically through the drill holes on the trunk under the effect of certain pressure. It is a new fertilization technology developed on the basis of strong injection for the treatment of deficiency of fruit trees. It has the advantages of saving fertilizer and symptomatic supplementation. However, improper application often results in unsatisfactory fertilizer efficiency, and even produces fertilizer damage that affects the normal growth and fruiting of fruit trees. The author now summarizes the relevant techniques for suspending fruit fertilizers in fruit trees as follows: 1. The mechanism of mineral nutrient absorption and transportation. The organs that the fruit tree absorbs for mineral nutrients are roots and leaves, mainly roots. Various nutrients enter the roots through complex physiological processes in the roots, and some of these nutrients must be assimilated into organic nutrients in the roots before they can be transported to various parts via the conduits. The nitrogen absorption of the trees is mainly ammonia nitrogen and nitrate nitrogen. The main transported by the pipeline is organic nitrogen and a small amount of nitrate nitrogen. The absorption of phosphorus and sulfur is mainly orthophosphoric acid and sulfate ion. The transport is mainly orthophosphoric acid and sulfate ion, and a small amount is transported in the organic state; the metal ion is absorbed and transported. All of them are in ionic state. It can be seen that the nutrient form transported by the catheter is not completely consistent with the root absorption. Therefore, not all fertilizers are suitable for hanging water. Only nutrients in the fertilizer can be transported in the conduit to be suitable for water lifting. Second, the adverse effects of hanging water remedies. Fertilizers that enter the tree body, if the nutrient form is not appropriate, may damage the ductal tissue; the unwanted substances that some of the trees that enter with the fertilizer solution will have an impact on the growth and development of the tree, and even produce poison. Due to the limitation of tree trunk drilling, the distribution of nutrients into the tree body is difficult to balance. If the local nutrient concentration is too high, there will be damage to the tree body. For example, after some water drops, young leaves and petal edges scorch; some branches are blocked, even Branches died locally. Therefore, normal trees do not need to use the drip method to make up for fat. Third, the application of suspended fertilizer. For the poor root absorption function, or the lack of fruit disease of the fruit trees, combined with treatment of water use fertilizer. This can effectively supplement nutrients and promote the normal growth of fruit trees. As usual in the treatment of fruit root rot and yellow leaf disease, the effect of adding urea is good. The concentration of urea is 0.8%, and the pH of the fertilizer solution is about 4.5. Adult large pear tree fertilizer solution is 3-4 kilograms, but it may induce lobular disease locally, so zinc should be supplemented accordingly. In addition, the water quality of the suspended water is better and the purity of the fertilizer is higher so as not to cause harm or poison to the tree body. Supplementing the fertilizer by hanging water can be delayed after falling leaves in autumn, or after the sap flow in the spring to sprouting. Trunk hole drilling should pay attention to the upper and lower branches of the catheter in the trunk, as far as possible to spread the fertilizer solution. Due to the strong acidity of the input fluid, the wood flowing through the fertilizer solution is damaged to varying degrees, and the successive year's hanging water damages the xylem, which affects the normal absorption and transport of nutrients by the tree. Therefore, do not suspend fruit trees year after year. Suspended fertilizer is not a permanent cure, only increase investment, fertility and fertility, in order to completely solve the contradiction of insufficient soil fertilizer.