In recent years, with the development of fertilization technology, foliar fertilization has been rapidly promoted and applied as a fertilization measure to strengthen the nutrition of crops and prevent certain symptoms of deficiency. Practice has proved that foliar fertilization is one of the fertilization technologies with rapid fertilizer efficiency, high fertilizer utilization rate and low dosage.

　　1 Fast absorption:

　　Using foliar fertilization, various nutrients can be quickly absorbed by the crop leaves, directly enter the plant body from the leaves, and participate in the metabolism of the crop. Therefore, its speed and effect are faster than the effect of soil fertilization. According to research, the rate of leaf fertilizer absorption is about twice as fast as that of roots.

　　2 Strong effect:

　　Foliar fertilization because the nutrients enter the crop body directly from the leaves, the absorption speed is fast, which can greatly increase the nutrient elements in the crop body in a short time, quickly alleviate the crop's lack of fertilizer, and maximize the benefits of fertilizer. Foliar fertilization can effectively promote the progress of various physiological processes in the crop body, significantly improve the photosynthesis intensity, increase the activity of enzymes, promote the synthesis, conversion and transportation of organic matter, which is conducive to the accumulation of dry matter, can increase yield and improve quality .

　　3 Savings:

　　Foliar fertilization is generally used in small amounts, especially for trace element fertilizers such as boron, manganese, molybdenum, iron, etc., root fertilization usually requires a larger amount to meet the needs of crops. The foliar fertilization is concentrated on the leaves of crops, and usually a fraction of the soil fertilization or a fraction of the tenth can be used to achieve satisfactory results.

　　 4 High efficiency:

　　Foliar spray fertilizer has the advantages of fast fertilizer efficiency, high utilization rate, remarkable effect, simple and easy to implement, etc. It is more and more popular with farmers.