The application of trace fertilizer can promote the absorption of nitrogen and potassium in fruit trees and improve the disease resistance, fruit setting rate and fruit quality of fruit trees. Spraying time is most effective when sensitive to fruit trees. The first period was to promote the healthy growth of flower buds; the second period was to increase the fruit setting rate; the third period was to consolidate the fruit setting rate, reduce the physiological fruit drop, and improve the quality. Of course, the above three periods are related to each other, and each stage should pay attention to spraying fertilizer. Fertilizer types 1. Boron fertilizer The application of boron fertilizer on fruit trees has a significant effect of stabilizing and stabilizing fruit and improving quality. Spraying 0.2% boric acid before flowering and flowering in fruit trees can increase fruit setting rate, promote flower bud differentiation and pollen tube elongation, increase fertilization rate and reduce physiological fruit drop of fruit trees. 2. Zinc Fertilizer Spraying 0.3% to 0.5% zinc sulfate and zinc oxide aqueous solution on young fruits, foliar and young fruit after fruiting of fruit trees can promote tree growth, increase fruit setting rate, and optimize fruit quality. 3. After the new leaves of the iron-fat fruit trees are exhibited, the leaves of the young part of the shoots at the top of the shoots are unevenly yellowed. At the same time, the chlorosis of the veins is the symptom of iron deficiency. Use 2%~5% of ferrous sulfate or ferric chloride to spray plants and leaves. It is specially used to draw this kind of ordinary insulin. The scale on the syringe is more accurate, because it needs to draw insulin according to 0.1ml or a finer scale, so its scale is relatively small. And the needle tube is thinner Disposable Insulin Syringe,Insulin Syringe With Needle Attached,Disposable Insulin Syringes Orange,Insulin Syringe With 31G Needle Changzhou Yuandong Medical Equipments Co.,Ltd , https://www.czydmedical.com