How to spray walnut foliar fertilizer

How to spray walnut foliar fertilizer? Please guide foliar spraying is an auxiliary measure of soil fertilization, that is, a certain concentration of fertilizer solution is sprayed directly on the stems and leaves of walnut trees with spraying tools, so as to improve the quality and quantity of fruits. Foliar fertilizer spraying is the use of the upper part of walnut trees, including stems, leaves, pericarp and other organs can directly absorb nutrients, with the advantages of directness and quick effect. Generally, 15-60 minutes after fertilization outside the root, the tree can absorb the fertilizer liquid. Especially in the case of natural disasters or sudden element deficiency, or in order to supplement the elements which are easily fixed by the soil, the loss can be recovered in time by external fertilization. Therefore, extra-root topdressing has the advantages of low cost, simple operation, high fertilizer utilization rate and good effect, which is an economical and effective way of fertilization. Spraying boron at flowering stage can increase the fruit setting rate. Spraying ferrous sulfate from May to June can thicken the leaves and increase photosynthesis. Spraying potassium sulfate from July to August can effectively improve the quality of walnut kernel. The fertilizer type, concentration and spraying time of extra-root topdressing are mainly determined according to soil condition and tree nutrition level. The common principle is that the concentration of walnut can be lower in the early growing period and higher in the later period. In the area of lack of water and fertilizer, the frequency of fertilizer spraying can be more. Fertilizer spraying can generally spray urea, calcium superphosphate, potassium phosphate, copper sulfate, ferrous sulfate and borax and other fertilizers to supplement nitrogen, phosphorus, potassium and other trace elements. Generally speaking, fertilizer spraying should be carried out at 8: 10 a.m. or after 16:00 in the afternoon, but not in rainy or windy weather. If it rains 15 minutes after spraying fertilizer, it is best to apply it again after the weather clears up. Click to get more walnut planting techniques click to get more fruit planting techniques