During the growth cycle of fruit trees, they need to undergo metabolic processes such as growth, initial results, fruit, aging, and renewal. There are certain differences in the physiological characteristics and nutritional requirements of tree age at different stages. Young-age fruit trees mainly develop tree crowns and expand root systems to fully accumulate tree nutrients. There was not much growth during this period, and the amount of fertilizer needed was not much, but it was very sensitive to fertilizer reactions. If malnutrition occurs at this stage, it will be difficult to make up for it even if it is applied later. Phosphorus fertilization and proper application of nitrogen and potassium fertilizers are one of the key measures for early fruit and early high yield. In the absence of results or in the initial result period, due to the continuous expansion of the root cap, it is necessary to maintain a more vigorous vegetative growth, and nitrogen fertilizer should account for a larger proportion. During this period, we must continue to expand the canopy and promote flower bud differentiation. Therefore, phosphorus and potassium should be added on the basis of nitrogen fertilizer application. As a result, the main purpose of fertigation is to produce high-quality and high-yield trees and increase the value of commodities. As the results of multiple and successive flower bud differentiation, should increase the proportion of phosphorus, potassium, calcium fertilizer, so fertilization should pay attention to nitrogen, phosphorus, potassium and calcium fertilizer, especially to increase the proportion of potassium fertilizer. After the fruit period, the trees gradually become old. In the old age, more nitrogen fertilizer should be applied. The proportion of nitrogen fertilizer should be the same as that of saplings in order to promote rejuvenation and maintain fruit. It can be seen that the different growth periods of fruit trees have different matching requirements for fertilizers. Only proper fertilization can make fruit trees grow vigorously and achieve high quality and high yields. Pvc Disposable Gloves,Pvc Plastic Gloves,Medical Pvc Gloves,Disposable Powder Free Vinyl Pvc Gloves HOLIK ASIA GROUP CO.LTD , https://www.holikasia.com