Mixed fodder additive capable of reducing absorption and residues of fodder heavy metals in tilapia bodies

Abstract

The invention discloses a mixed fodder additive capable of reducing absorption and residues of fodder heavy metals in tilapia bodies. Per kilogram of the fodder additive comprises the following components by weight: 200-500g of chitosan, 50-300g of quercetin, 25-175g of allicin, 50-200g of alpha-lipoic acid and the balance of a carrier. The mixed fodder additive can be used for reducing the absorption and residues of the fodder heavy metals in the tilapia bodies. The adding amount of the mixed fodder additive in a tilapia mixed fodder is 0.2%-4% by weight of the fodder and the mixed fodder additive can obviously reduce the level of the heavy metals in intestines, livers, muscles and an aquaculture water body of tilapia, increase the discharge of the heavy metals in excrements and prevent secondary pollution; the mixed fodder additive can also improve the antioxidant capacity of hepatopancreas and effectively relieve the growth inhibition effect of the heavy metals. The mixed fodder additive has the characteristics of easiness in obtainment of raw materials, moderate cost, safety, effectiveness, no incompatibilities, simple preparation, low adding amount and the like and further has good application prospects.

Description

technical field [0001] The invention relates to the field of feed additives, in particular to a mixed feed additive that reduces the absorption and residue of feed heavy metals in tilapia. Background technique [0002] Tilapia, also known as African crucian carp, is a freshwater farmed fish cultivated by key scientific research in the world's aquaculture industry, and is known as one of the main sources of animal protein in the future. my country is the largest breeding and exporting country of tilapia in the world. The degree of intensive farming of non-fish areas has been continuously improved. However, with the intensification of environmental pollution, heavy metals may enter tilapia through plant feed, animal feed and mineral feed. Once heavy metals accumulate in the body, it is generally difficult to remove them from the body. Heavy metals entering the fish body can cause the body to generate a large number of free radicals, destroy the balance between the body's oxida...

AI Technical Summary

Problems solved by technology

However, the Ministry of Agriculture Announcement No. 1224 "Standards for the Safe Use of Feed Additives" stipulates the maximum limit value of trace mineral elements. Improper use will lead to new problems such as excessive trace elements in feed products, unqualified products, element imbalance, and environmental pollution. The problem

(2) The use of heavy metal complexing agents such as calcium edetate, metallothionein, sodium dimercaptosuccinate, etc. can quickly complex a large amount of heavy metals in the body. It has a good effect in breastfeeding, but it is mostly used in the acute toxicity of heavy metals. Long-term use of these complexing agents in fish feed will inevitably affect the normal metabolism of essential trace elements, and even cause damage to some organs

[0008] Because tilapia species, feed composition, breeding environment, digestive physiological characteristics, sensitivity to heavy metals, etc. are very different from terrestrial animals, it is necessary to develop additive products aimed at the hazards of heavy metals in fish feed; use inorganic adsorption Active substances with poor anti-oxidation ability and heavy metal excretion ability in the body are difficult to meet the current needs of tilapia farming enterprises and tilapia product safety

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