Foliar fertilization technique

In recent years, in order to increase the crop yield, people continue to increase the amount of chemical fertilizer applied to the soil, the benefit will decrease when the soil application of chemical fertilizer reaches a certain amount, and the yield is difficult to increase significantly. Therefore, attention should be paid to foliar fertilization. The application of foliar fertilizer is an effective way to improve crop yield and quality, and is an important means of average fertilization. 1 the advantages of foliar fertilization 1.1 foliar fertilization can quickly supplement the nutrients needed during crop growth, which plays an important role in timely remediation of some crop deficiency or natural disasters. 1.2 foliar fertilization can enhance the metabolic ability of crops and promote root absorption of nutrients, especially in the late growth stage of crops, root aging, weak absorptive capacity, timely foliar fertilization can avoid early senescence and yield reduction of crops. 1.3 foliar fertilization is not affected by soil factors, and the fertilizer use efficiency is high, which is 6-20 times higher than that of soil fertilization. 1.4 the amount of fertilizer application is small, which is both economical and efficient. Foliar fertilization is generally 10% to 20% of the amount of soil fertilizer, but its fertilizer efficiency is several times higher than that of soil fertilizer, which can greatly reduce the investment of fertilizer. 1.5 foliar fertilization can avoid groundwater pollution caused by excessive application of chemical fertilizer in the soil. (2) foliar topdressing Fuer 655 is composed of plant growth regulators, major elements, various trace elements and humic acid, which has the advantages of rapid action, low cost and remarkable effect. Suitable for all kinds of crops, 400% 600 times liquid spray 2 times 3 times, the yield can be increased by 10% and 20%. 3 Technical points 3.1 the amount of liquid sprayed with foliar fertilizer should be wet rather than dripping. 3.2 cloudy days or the evening after sunset is the best time for foliar spraying. 3.3 use period: soybean was applied once at the early flowering stage, podding stage and seed filling stage. Corn was sprayed once at seedling stage and jointing stage. Wheat was sprayed once at booting stage and at the first flowering stage. Rice was sprayed once at seedling stage, young panicle differentiation stage and booting stage.