Feeding microelement amino acid chelate additive and preparation method thereof

Abstract

The invention relates to the technical field of feed additive pretreatment, and particularly discloses a feeding microelement amino acid chelate additive and a preparation method thereof. The additive is prepared by coating the surface of a microelement amino acid chelate with a glycerin monostearate layer and a monolaurin layer in sequence from inside to outside, wherein the parts by weight of all raw materials are 5-7 parts of the microelement amino acid chelate, 1-2 parts of glycerin monostearate and 1-2 parts of monolaurin. Both the glycerin monostearate and the monolaurin have strong acid resistance, and separate the dissociation of gastric acid to the microelement amino acid chelate; after the additive enters the intestinal tract, the coating layers are digested, further the microelement amino acid chelate inside is released and is quickly absorbed and utilized, and the bioavailability of the microelement amino acid chelate is increased. The preparation method is simple and convenient to operate, easy to control, and suitable for industrial popularization and application.

Description

technical field [0001] The invention relates to the technical field of feed additive pretreatment, in particular to a trace element amino acid chelate additive for feed and a preparation method thereof. Background technique [0002] Trace element amino acid chelate is a new type of feed additive developed in recent years to replace inorganic trace elements. It is because amino acid ligands (glycine, lysine, methionine, etc.) 2+ 、Cu 2+ , Zn 2+ , Mn 2+ ) chelation, so that trace elements can improve the bioavailability of trace elements by means of amino acid absorption channels, however, the chelation strength of amino acids and trace elements is not high, and the pKd is about 6-8 under neutral conditions, especially in acidic conditions Down, H + It will compete with metal ions for the electron-donating groups of amino acids, resulting in a significant reduction in the chelation strength and chelation rate of the trace element amino acid chelate. [0003] The pH value o...

AI Technical Summary

Problems solved by technology

[0002] Trace element amino acid chelate is a new type of feed additive developed in recent years to replace inorganic trace elements. It is because amino acid ligands (glycine, lysine, methionine, etc.) 2+ 、Cu 2+ , Zn 2+ , Mn 2+ ) chelation, so that trace elements can improve the bioavailability of trace elements by means of amino acid absorption channels, however, the chelation strength of amino acids and trace elements is not high, and the pKd is about 6-8 under neutral conditions, especially in acidic conditions Down, H + It will compete with metal ions for the electron-donating groups of amino acids, resulting in a significant reduction in the chelation strength and chelation rate of trace element amino acid chelates

[0003] The pH value of animal gastric juice is around 1-2, the chelation rate of amino acid chelate of trace elements in the stomach will drop to 20-40%, and more than 60% of trace element ions will dissociate from amino acid ligands and be in free form. After entering the small intestine, as the pH of the digestive tract increases, the free trace element ions will combine with phosphate, phytic acid, polyphenols, etc. with higher affinity to form insoluble complexes, resulting in the inability of most trace elements to be absorbed and utilized

Amino acid chelation loses its meaning because it cannot be combined with amino acid again, which is also an important reason why many trace element amino acid chelates are not effective in actual use.