In recent years, with the development of fertilization technology, foliar fertilization has been rapidly promoted and applied as a fertilization measure to strengthen crop nutrition and prevent some deficiency diseases. It has been proved by practice that foliar fertilization is one of the fertilization techniques with fast fertilizer effect, high fertilizer utilization rate and less fertilizer dosage.
1 Fast absorption:
After soil fertilization, various nutrient elements are first adsorbed by the soil, and some fertilizers must undergo a transformation process in the soil, and then be absorbed by the crop roots through ion exchange or diffusion, through the vascular bundles of roots and stems, and then to the leaves. The distance of nutrient transport is long and the speed is slow. With foliar fertilization, various nutrients can be quickly absorbed by crop leaves, directly from the leaves into the plant body, and participate in the metabolism of crops. Therefore, its speed and effect are faster than the effect of soil fertilization. According to research, the speed of leaf fertilizer absorption is about 1 times faster than the speed of root fertilizer absorption.
2 Strong effect:
Foliar fertilization Because the nutrients enter the object directly from the leaves, the absorption rate is fast, the nutrient elements in the body of the crop can be greatly increased in a short time, and the shortage of crop fertilizer can be quickly alleviated, and the maximum benefit of fertilizer can be played. Foliar fertilization can effectively promote the progress of various physiological processes in crops, significantly improve the intensity of photosynthesis, improve enzyme activity, promote the synthesis, transformation and transportation of organic matter, facilitate the accumulation of dry matter, increase yield and improve quality.
3 Consumption province:
The amount of leaf fertilization is generally less, especially for boron, manganese, molybdenum, iron and other trace element fertilizers, the use of root fertilization usually requires a larger amount to meet the needs of crops. The leaf fertilization is concentrated on the crop leaves, and usually a fraction or a tenth of the amount of soil fertilization can achieve satisfactory results.
4 High efficiency:
Foliar spraying fertilizer has the advantages of fast fertilizer efficiency, high utilization rate, remarkable effect, simple and easy, and is more and more favored by farmers.
From the perspective of increasing yield alone, amino acid foliar fertilizer spraying on fruit trees can steadily increase yield by about 30% to 40%, and can fully absorb and transform nutrients each time in 5 to 7 days, especially spraying before fruit trees can improve fruit setting rate and reduce the occurrence of flower and fruit drop. After flowering, fruit trees need fertilizer at the peak, whether the shortage of nutrients determines the yield of a single fruit tree, and the demand for nutrients at this time is not only the need for a large number of elements nitrogen, phosphorus and potassium, but also iron, manganese, zinc, copper, calcium, boron, molybdenum, and so on, spraying these trace elements at this time can improve fruit quality such as bright color, sweetness taste and promote early maturity.