Foliar spray fertilizer: spray fertilizer on the crown, nutrients through the leaves, stems and other stomatal and stratum corneum into the organization is the main way to top dressing. Foliar spray fertilizer distribution evenly, with less dosage, fast fertilizer effect, good effect apple, general urea, phosphorus fertilizer absorption rate up to 50% and 20% in 8 hours, 88% and 50% in 6 days, while soil in the same period The absorption rate of phosphorus application is only 6%-9%; it is not leached and fixed by the growth center and soil. The method is also simple and easy to use and widely used by the majority of apple farmers. In production, it mainly supplements trace elements and some macroelements such as calcium, zinc, boron, iron, nitrogen, phosphorus, and potassium.
Fertilizer spraying, spraying zinc sulfate and ferrous sulfate in the early stage of germination, supplementing amino acids; spraying boron and nitrogen as the main component to supplement flowering season; spraying low concentration nitrogen, amino acid chelating fertilizer and calcium as the main Heavy calcium, galifax or calcium lactate; phosphorus and potassium and photosynthetic and rare earth micro-fertilizers in the middle growth phase, such as multi-enzyme amino acids.
Spray fertilizer should be sprayed on the back of the leaf as much as possible, and require uniform. Spraying fertilizer can be sprayed alone or in combination with spraying, but it is generally not mixed with strong sulfuric acid pesticides such as lime sulfur and Bordeaux mixture.
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