Solid phase fertilizer composition
AssigneeArevo, Inc.
InventorsJonas Öhlund, Torgny Näsholm, Mattias Holmlund
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Abstract
The present invention relates to a fertilizer composition comprising nitrogen and phosphorus, wherein nitrogen is provided by basic L-amino acid(s) complexed to polyphosphate(s). The complex may be precipitated with multivalent metal ion(s) to provide a solid phase fertilizer composition. The basic L-amino acid is advantageously L-arginine and/or L-lysine. The fertilizer composition is capable of providing controlled release of nitrogen during prolonged periods of time.
Claims15
A solid phase fertilizer composition comprising precipitated complexes consisting of basic L-amino acid, polyphosphate, and Fe(II) and/or Fe(III) metal ion(s), wherein the number of phosphorous atoms in the polyphosphate is at least or equal to six and wherein metal in the complexes consists of Fe(II) and/or Fe(III).
A solid phase fertilizer preparation which comprises a combination of two or more differently composed solid phase fertilizer compositions, wherein each of the two or more differently composed fertilizer compositions comprises precipitated complexes consisting of basic L-amino acid, polyphosphate, and Fe(II) and/or Fe(III) metal ion(s), wherein the number of phosphorous atoms in the polyphosphate is at least or equal to six and wherein metal in the complexes consists of Fe(II) and/or Fe(III).
A method of preparing a solid phase fertilizer composition, which method comprises providing a liquid comprising at least one basic L-amino acid;
- adding a polyphosphate source;
- adding a source of Fe(II) and/or Fe(III) metal ions;
- increasing the pH to precipitate a complex consisting of basic L-amino acid, polyphosphate, and Fe(II) and/or Fe(III) metal ion(s), wherein the number of phosphorous atoms in the polyphosphate is at least or equal to six and wherein metal in the complex consists of Fe(II) and/or Fe(III);
- and collecting and drying the precipitated complex to provide a solid phase fertilizer.
Dependencies are inferred from the claim text.