Multi-trace element controlled release fertilizer and preparation method thereof

Abstract

The invention discloses a multi-trace element controlled release fertilizer and a preparation method thereof, and relates to the field of chemical fertilizers. The fertilizer is characterized in that the fertilizer comprises, by weight, 12-32 parts of urea, 11-15 parts of dry ammonium chloride, 11-15 parts of wet ammonium chloride, 0-15 parts of ammonium phosphate, 0-5 parts of calcium powder, 0-5 parts of ammonium bicarbonate, 8-9 parts of ammonium sulfate, 8-13 parts of potassium chloride, and 1 part of a PASP and trace element mixed solution; and especially the surface of the fertilizer is uniformly coated with the PASP and trace element mixed solution and then is coated. The fertilizer can meet plants' demands of various nutrients and trace elements, and can slowly release microelement fertilizer nutrients to control the nutrient loss of the fertilizer. The multi-trace element controlled release fertilizer can promote absorption of trace elements by crops, promotes growth of crop roots, enhances the lodging resistance, reduces the fertilizer loss, improves the fertilizer utilization rate, has a long-term fertilizer effect, and can continuously and stably supply plants' demands of nutrients in the whole growth period.

Description

technical field [0001] The invention relates to the field of chemical fertilizers, in particular to a multi-element loss-controlling fertilizer and a preparation method thereof. Background technique [0002] In the 1840s, the synthesis and application of chemical fertilizers greatly increased the yield of crops, and the chemical fertilizer industry has developed rapidly since then. Before my country's reform and opening up, farmyard nitrogen fertilizer was mainly used; in the 1980s and 1990s, it entered the era of high-concentration nitrogen fertilizer represented by urea; after entering the 21st century, compound fertilizers and organic compound fertilizers developed rapidly; in recent years, the micro-fertilizer industry rise rapidly. [0003] Micro-fertilizer, the abbreviation of micro-element, refers to the fertilizer containing micro-nutrient element, and the demand for crop absorption is small. However, like constant elements, they are equally important to crops and c...

AI Technical Summary

Problems solved by technology

This method has the effect of promoting crops' absorption of trace elements and increasing yield, but there are also some problems

First of all, in the granulation process, it cannot be guaranteed that urea granules are mixed quantitatively and evenly with PASP and trace element mixture; secondly, although urea contains PASP and trace elements, it cannot meet the needs of crops for other nutrients, such as phosphorus fertilizer and potassium fertilizer. ; Finally, its release speed is fast, nutrients are easy to lose, and the utilization rate is low. If the amount of fertilizer is increased, the corresponding agricultural cost will also increase

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