CN112970943A

CN112970943A - High-efficiency composite antioxidant for feed and preparation method thereof

Info

Publication number: CN112970943A
Application number: CN201911306892.7A
Authority: CN
Inventors: 王海东
Original assignee: Wuxi Jinjie Zhongsheng Biotechnology Co ltd
Current assignee: Wuxi Jinjie Zhongsheng Biotechnology Co ltd
Priority date: 2019-12-18
Filing date: 2019-12-18
Publication date: 2021-06-18

Abstract

The invention relates to a high-efficiency feed composite antioxidant, which comprises the following components: 2-22wt% of ethoxyquinoline, 3-18wt% of dibutyl hydroxy toluene, 2-8wt% of synergist, 0.5-3wt% of emulsifier and the balance of carrier. According to the invention, the dibutyl hydroxy toluene (BHT), the ethoxy quinoline (EMQ), the emulsifier and the synergist are scientifically and reasonably compounded, and the creep flow and permeability of the EMQ, the solubilizing and dispersing effects of the emulsifier and the synergistic effect among different components are fully utilized, so that the antioxidant has an excellent antioxidant protection effect. The invention also correspondingly discloses a preparation method of the composite antioxidant, which comprises the following steps: mixing BHT, EMQ, an emulsifier and an acid agent, and homogenizing to obtain a homogeneous molten liquid; adsorbing and uniformly mixing the homogeneous fusion liquid and silicon dioxide to obtain a first-stage mixture; and then adding a diluting carrier and a chelating agent into the primary mixture, uniformly mixing, and sieving to obtain the feed composite antioxidant. The method has the advantages of simple process steps and safe operation, and the prepared antioxidant has obvious antioxidant effect.

Description

High-efficiency composite antioxidant for feed and preparation method thereof

Technical Field

The invention relates to the technical field of feed additives, in particular to a high-efficiency feed composite antioxidant and a preparation method thereof.

Background

The feed antioxidant occupies a small proportion in the feed, the cost occupied by the raw materials is low, but the quality of the feed is greatly influenced. The oxidation of feed and feed materials during production, storage and transportation is well appreciated. In order to ensure the vitamin A, D in the feed₃E, K, carotene, various fats, fish meal, meat and bone meal, feather meal and other nutritional ingredients slow down oxidation, ensure the freshness of the feed and prolong the storage time of the feed, and an antioxidant is added.

Various antioxidant products, such as various fish dragons, are mixed in the market at present, the product effect is good, and the main effective components of the antioxidant varieties used for feeds in the market are most commonly ethoxyquinoline, Butyl Hydroxy Anisole (BHA), tert-butyl hydroquinone (TBHQ), dibutyl hydroxy toluene (BHT) and Propyl Gallate (PG).

The ethoxyquin has excellent antioxidant effect, can effectively prevent oil rancidity and protein oxidation in the feed and prevent vitamins from deteriorating, but because the secondary amine group of the ethoxyquin is more active, a large amount of ethoxyquin is required to be added to obtain a good antioxidant effect when the ethoxyquin is used alone as a feed antioxidant, and the dosage of the ethoxyquin in the feed is generally 100-150 mg/kg. Butylated Hydroxyanisole (BHA) white to yellowish crystalline or waxy solid has antioxidant and antibacterial effects, 250mg/kg BHA can inhibit aflatoxin production, and 200mg/kg BHA can completely inhibit spore growth of toxinase and Aspergillus niger in food and feed. The tert-butylhydroquinone (TBHQ) is white to light grey crystal or crystalline powder, has the effects of preventing and stopping rancidity of most grease, particularly vegetable oil, and can also effectively inhibit the growth of bacteria such as bacillus subtilis, staphylococcus aureus, escherichia coli, brevibacterium aerogenes and the like and microorganisms such as aspergillus niger, aspergillus versicolor, aspergillus flavus and the like. However, Butyl Hydroxyanisole (BHA) and tert-butyl hydroquinone (TBHQ) are both in a granular or powdery physical state, and increase of the contact antioxidant effect is limited to some extent. The dibutyl hydroxy toluene (BHT) is white crystal, can be used as feed antioxidant to protect vitamins in feed, prevent oxidation loss of fat and protein, and has antibacterial effect with maximum dosage of 150 g/t. However, since the toxicity is high, the amount of the antioxidant to be added must be strictly controlled in consideration of the irritation and the residue in the animal body which may be caused by the toxicity. Propyl Gallate (PG) is white to light yellow brown crystalline powder or milky needle crystal, slightly bitter and dilutable, and can be decomposed by illumination. Is sensitive to heat and can be decomposed at the melting point, so that the stability of the product is poor when the product is applied to food, the product is not high-temperature resistant, and the product is not suitable for baking. Thus, Propyl Gallate (PG) alone as a feed antioxidant also has the problem of limiting the improvement of antioxidant effect and the durability of antioxidant because of being solid powder.

Obviously, the single use of a certain antioxidant as the antioxidant component of the feed not only has large mixing amount and high cost, but also easily causes the problems of poor local antioxidant effect and even feed deterioration caused by antioxidant failure due to nonuniform mixing. On the other hand, a large number of documents and experiments show that the antioxidant effect of the compound antioxidant is superior to that of a single antioxidant, and theoretically, the antioxidant plays a synergistic role in the compounding process to strengthen the antioxidant effect. But in fact, the synergistic effect is closely related to the composite process, many manufacturers for producing the feed antioxidant pulverize (solid raw materials) or adsorb (liquid raw materials) the antioxidant raw materials, and then mix with the carrier to obtain the composite antioxidant, and the antioxidant effect of the product is the superposition of the effects of the antioxidant raw materials at best, but the synergistic effect cannot be achieved. How to develop a compound feed antioxidant with higher antioxidant effect is still a problem to be solved by technical personnel in the field.

For this reason, chinese patent No. CN1113117C discloses a method for producing an antioxidant, but the technical solution disclosed in this patent still has certain disadvantages: on one hand, the cost is high, on the other hand, short-chain fatty alcohol such as ethanol and butanol is needed to be used in the process to reduce the viscosity of the antioxidant compound, but the substances are volatile and flammable, and the process is carried out in a high-temperature environment, so that the safety is not high, and the risk of explosion is high.

Therefore, there is a need to develop a new high-efficiency compound antioxidant and a preparation method thereof based on the prior art.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide the efficient feed composite antioxidant which has the advantages of safe preparation process and obvious antioxidant effect.

The above object of the present invention is achieved by the following technical solutions:

a high-efficiency composite antioxidant for feed comprises the following components,

ethoxy quinoline 2-22wt%

3-18wt% of dibutylhydroxytoluene

2-8wt% of synergist

0.5-3wt% of emulsifier

The balance being carriers.

By adopting the technical scheme, the creep flow and permeability of the ethoxyquin and the compatibilization and emulsification dispersion characteristics of the emulsifier are fully utilized, and the flow, diffusion and permeation of the dibutyl hydroxy toluene are promoted, so that the antioxidation protection effect of the dibutyl hydroxy toluene on the feed is fully exerted. According to the formula, the dibutyl hydroxy toluene, the ethoxy quinoline, the emulsifier and the synergist are reasonably compounded, and the synergistic interaction among different components is fully utilized, so that the antioxidant protection effect of each antioxidant component is fully exerted. In addition, volatile inflammable substances such as ethanol and butanol are not added in the antioxidant formula, so that the operation safety of the antioxidant preparation process is improved.

Further, the synergist comprises an acid agent and a chelating agent, and the mass ratio of the acid agent to the chelating agent is 1: (0.5-1).

By adopting the technical scheme, the acid agent is beneficial to maintaining the antioxidant activity of the antioxidant component, so that the antioxidant component can fully play the antioxidant protection role. The incorporation of the chelating agent can effectively inactivate or eliminate the oxidation catalysis of the oxidative metal ions, and improve the performance of the anti-oxidation protection effect.

Further, the acid agent is one or more of phosphoric acid, citric acid, tartaric acid and fumaric acid.

By adopting the technical scheme, the phosphoric acid, the citric acid, the tartaric acid and the fumaric acid have excellent synergistic effect, and are beneficial to fully exerting the antioxidant protection effect of the antioxidant components. Meanwhile, the selected organic acid (citric acid, tartaric acid and fumaric acid) has certain metal chelating capacity and can cooperate with the chelating agent to play an oxidation catalysis role in inactivating or eliminating oxidized metal ions.

Further, the chelating agent is disodium ethylene diamine tetraacetate.

Through adopting above-mentioned technical scheme, the disodium ethylene diamine tetraacetate is easily acquireed, and the synergistic effect is good for this application scheme realizes easily.

Further, the emulsifier is one or more of fatty acid monoglyceride, soybean phospholipid and fatty acid sorbitan ester.

The fatty acid monoglyceride, the soybean lecithin and the fatty acid sorbitan ester have excellent emulsification and solubilization effects, and are beneficial to the effective antioxidant component of the antioxidant to fully exert the antioxidant protection effect. Meanwhile, the fatty acid monoglyceride, the soybean phospholipid and the fatty acid sorbitan ester are all safe emulsifiers which are allowed to be used in food industry, and have almost no health risk and are safer for animals when being used in feed.

Further, the carrier comprises silica and a diluting carrier, and the mass ratio of the silica to the diluting carrier is 1: (0.5-1), wherein the diluting carrier is one or more of zeolite powder, acidic calcium sulfate, sodium metabisulfite and sodium bisulfite.

By adopting the technical scheme, the silicon dioxide has oil absorption and can fully adsorb the antioxidant component, and the addition of the diluting carrier reduces the production cost of the antioxidant, further increases the adsorption effect on the antioxidant component and prolongs the antioxidant protection time of the antioxidant on the feed.

Further, the composition comprises the following components,

ethoxy quinoline 2-22wt%

3-18wt% of dibutylhydroxytoluene

2-8wt% of synergist

0.5-3wt% of emulsifier

Gardenoside 0.5-1wt%

Oleuropein 0.5-1wt%

Glycyrrhrizae radix extract 0.5-1wt%

The balance being carriers.

By adopting the technical scheme, the geniposide, the oleuropein and the liquorice extract have excellent antioxidant, bactericidal and bacteriostatic effects, so that the antioxidant performance of the antioxidant is further improved, and the quality guarantee period of the feed is prolonged. Meanwhile, the feed doped with the antioxidant is used for feeding animals, so that the health of the animals is kept, and the animal growth is promoted.

Aiming at the defects in the prior art, the invention also aims to provide a preparation method of the high-efficiency feed composite antioxidant, the method has the advantages of simple process steps and safe operation, and the prepared antioxidant has obvious antioxidant effect.

a preparation method of a high-efficiency feed composite antioxidant comprises the following steps,

homogenizing: mixing dibutyl hydroxy toluene, ethoxy quinoline, an emulsifier and an acid agent which are weighed according to a certain proportion, and then carrying out homogenization treatment under the nitrogen protection condition to obtain a homogeneous fusion liquid;

mixing raw materials: adsorbing and mixing the homogenized fusion liquid obtained by homogenizing treatment and the weighed silicon dioxide to obtain a first-stage mixture; and then, adding the weighed diluting carrier and the chelating agent into the primary mixture, uniformly mixing, and sieving to obtain the feed composite antioxidant.

By adopting the technical scheme, the dibutyl hydroxy toluene, the ethoxy quinoline, the emulsifier and the acid agent are uniformly mixed, the components can be fully fused through homogenization treatment, then the mixture is mixed with the silicon dioxide, so that the silicon dioxide can fully adsorb the anti-oxygen component, and finally the dilutable carrier and the chelating agent are added, so that the adsorbability of the anti-oxygen component is further increased, the components are fully fused, and the antioxidant obtained in such a way has an excellent anti-oxygen effect. Meanwhile, because volatile combustible components such as ethanol, butanol and the like do not need to be added in the preparation process, the operation safety in the preparation process of the antioxidant is greatly improved.

Further, the method comprises the following steps of,

pretreatment of a carrier: mixing the diluted carrier with geniposide, oleuropein and Glycyrrhrizae radix extract to obtain carrier mixture;

mixing raw materials: adsorbing and mixing the homogenized fusion liquid obtained by homogenizing treatment and the weighed silicon dioxide to obtain a first-stage mixture; and then, adding the carrier mixture obtained in the carrier pretreatment step and the weighed chelating agent into the primary mixture, uniformly mixing, and sieving to obtain the feed composite antioxidant.

By adopting the technical scheme, the gardenoside, the oleuropein, the liquorice extract and the diluting carrier are mixed at a certain rotating speed, so that the crushing degree of the diluting carrier can be increased, the contact specific surface area between the antioxidant and the feed is increased, and the antioxidant can fully play the role of antioxidant protection. On the other hand, the geniposide, the oleuropein and the liquorice extract are uniformly dispersed, the effect of synergistically increasing the anti-oxygen property can be fully exerted, and the sterilization and bacteriostasis of the antioxidant are improved. The antioxidant prepared by the method has the effect of promoting the growth of animals after being added into the feed.

Further, in the homogenizing step, a rotary or pressure homogenizing method is adopted to prepare a homogeneous fusion liquid from the mixture of the dibutyl hydroxy toluene, the ethoxy quinoline, the emulsifier and the acid agent.

By adopting the technical scheme, all the components are fully dispersed, and the homogenization treatment fluid and the carrier are fully fused in the subsequent steps. Preferably, an ultrasonic homogenization treatment method is selected, and the homogenized particles after homogenization have a smaller particle size and the homogenization treatment is more efficient.

In summary, the invention includes at least one of the following beneficial technical effects:

1. the invention discloses an optimal proportioning composition of a high-efficiency feed composite antioxidant, which is prepared by scientifically and reasonably compounding dibutyl hydroxy toluene (BHT), ethoxy quinoline (EMQ), an emulsifier and a synergist, and fully utilizing the synergistic interaction among different components, thereby fully playing the antioxidant protection role of each antioxidant component

2. The preparation method comprises the following steps of homogenizing dibutyl hydroxy toluene (BHT), Ethoxyquinoline (EMQ) and an emulsifier to prepare a homogeneous fusion liquid of the BHT and the EMQ, fully utilizing the creeping flow and permeability of an antioxidant component EMQ and the emulsifying characteristics such as solubilization and dispersion of the emulsifier, and promoting the flow and diffusion and permeation of the BHT, so that the antioxidant protection effect of the BHT on the feed is fully exerted;

3. the addition of the synergist and the dilutable carrier obviously improves the contact specific surface area of the antioxidant and the feed, effectively inactivates or eliminates the oxidation catalysis of the oxidative metal ions, and enhances the exertion of the antioxidation;

4. the addition of the geniposide, the oleuropein and the licorice extract further increases the antioxidant effect of the antioxidant on one hand, and can synergistically play a role in promoting the growth of animals on the other hand; in addition, the licorice extract has a certain detoxification effect, so that potential health risks to animals caused by antioxidant residues are reduced, and the antioxidant is better and safer;

5. the invention correspondingly discloses a preparation method of the composite antioxidant for the feed, which has the advantages of simple process steps and safe operation, and the prepared high-efficiency composite antioxidant for the feed has an obvious antioxidant effect.

Detailed Description

The present invention will be described in further detail with reference to examples.

The sources of the raw materials used in the examples are shown in Table 1.

TABLE 1 table of sources of substances used in the examples

Examples 1 to 8:

examples 1 to 8 all relate to a high-efficiency feed composite antioxidant, which is prepared by taking ethoxyquinoline, dibutyl hydroxy toluene, a synergist, an emulsifier and a carrier as raw materials. Specifically, the raw material ratios of examples 1 to 8 are shown in Table 2,

TABLE 2 ingredient proportion Table for examples 1-8

The synergist comprises an acid agent and a chelating agent, and the mass ratio of the acid agent to the chelating agent is 1: (0.5-1). The acid agent is selected from one or more of phosphoric acid, citric acid, tartaric acid and fumaric acid, and the chelating agent is disodium edetate. The compositions of the synergists used in examples 1 to 8 are shown in Table 3.

TABLE 3 composition of the synergists of examples 1 to 8

The emulsifiers used in examples 1 to 8 are selected from one or more of fatty acid monoglyceride, soybean phospholipid, and fatty acid sorbitan ester, and specifically, the emulsifiers selected in each example are shown in table 4.

TABLE 4 composition of emulsifiers for examples 1-8

The carriers used in examples 1 to 8 each included silica and a diluting carrier, and the mass ratio of silica to diluting carrier was 1: (0.5-1). The diluting carrier can be one or more selected from zeolite powder, acidic calcium sulfate, sodium metabisulfite and sodium bisulfite. The specific compositions of the carriers in examples 1-8 are shown in Table 5.

TABLE 5 composition of the vectors of examples 1-8

The preparation methods of the feed composite antioxidant of the embodiments 1 to 8 are basically the same, and the specific steps are as follows:

the materials were weighed out in the proportions shown in tables 2 to 5, respectively. And then under the protection of nitrogen, mixing the weighed dibutyl hydroxy toluene, ethoxy quinoline, emulsifier and acid agent, and carrying out ultrasonic homogenization treatment at 70 ℃ to obtain a homogeneous fusion liquid. And then, adsorbing and mixing the homogenized fusion liquid obtained by homogenizing treatment and the weighed silicon dioxide to obtain a first-grade mixture. And adding the weighed diluting carrier and the chelating agent into the primary mixture, uniformly mixing, and sieving to obtain the feed composite antioxidant.

Examples 9 to 16:

examples 9 to 16 all relate to a high-efficiency feed composite antioxidant, which is prepared by taking ethoxyquinoline, dibutyl hydroxy toluene, a synergist, an emulsifier, a carrier, geniposide, oleuropein and a liquorice extract as raw materials. Specifically, the raw material formulations of examples 9 to 16 are shown in Table 6,

TABLE 6 ingredient proportion tables for examples 9 to 16

The synergist comprises an acid agent and a chelating agent, and the mass ratio of the acid agent to the chelating agent is 1: (0.5-1). The acid agent is selected from one or more of phosphoric acid, citric acid, tartaric acid and fumaric acid, and the chelating agent is disodium edetate. The compositions of the synergists used in examples 9 to 16 are shown in Table 7.

TABLE 7 compositions of the synergists of examples 9 to 16

The emulsifiers used in examples 9 to 16 are selected from one or more of fatty acid monoglyceride, soybean phospholipid, and fatty acid sorbitan ester, and specifically, the emulsifiers selected in each example are shown in table 8.

TABLE 8 emulsifier composition Table for examples 9-16

The carriers used in examples 9 to 16 each comprised silica and a diluting carrier, and the mass ratio of silica to diluting carrier was 1: (0.5-1). The diluting carrier can be one or more selected from zeolite powder, sodium sulfate, sodium metabisulfite and sodium bisulfite. The specific compositions of the carriers in examples 9-16 are shown in Table 9.

TABLE 9 composition of vectors in examples 9-16

The preparation methods of the feed composite antioxidant of the embodiments 9 to 16 are basically the same, and the specific steps are as follows:

the materials were weighed out in the proportions shown in tables 6 to 9, respectively. And mixing the weighed dibutyl hydroxy toluene, ethoxy quinoline, emulsifier and acid agent under the protection of nitrogen, and then carrying out ultrasonic homogenization treatment at 70 ℃ to obtain a homogeneous fusion liquid. Under the protection of nitrogen, the diluted carrier, jasminoidin, oleuropein and licorice extract were mixed uniformly at 4000-. Then, adsorbing and mixing the homogenized fusion liquid obtained by homogenizing treatment and the weighed silicon dioxide to obtain a first-grade mixture; and adding the carrier mixture obtained in the carrier pretreatment step and the weighed chelating agent into the primary mixture, uniformly mixing, and sieving to obtain the feed composite antioxidant.

Comparative example 1:

the compound feed antioxidant oxygen is purchased from Xiamen peony feed science and technology development limited company.

Comparative example 2:

antioxidant xiaoling purchased from agrimoto biotechnology limited in beijing.

And (3) performance testing:

taking a complete formula feed for 0-4 weeks old chickens as an experimental feed sample, wherein the formula of the experimental feed sample is as follows: 21.0 percent of crude protein, 1.00 percent of calcium, 0.65 percent of phosphorus and 0.37 percent of salt.

1) Test for antioxidant Effect

The oxidation degree of the feed (based on the measured peroxide value) was evaluated by adding equal amounts of the complex antioxidant of examples 1 to 16, the antioxidant of comparative examples 1 to 2, ethoxyquinoline and dibutylhydroxytoluene to the feed samples, and storing the mixture under the same conditions (25 ℃) for the same time.

Determination of peroxide value (POV) A certain amount of crushed feed samples are weighed according to the method of national standard GB/T5009.6-2003, and fat extraction and peroxide value determination are carried out by taking anhydrous ether as a solvent. The peroxide value of less than or equal to 15g/100g is regarded as normal, the peroxide value of 15-30 g/100g is regarded as slight oxidation of the product, and the peroxide value of more than or equal to 30g/100g is regarded as severe oxidation.

The results of the experiment are reported in table 10.

TABLE 10 comparison of the antioxidant effect of chicken complete feed with different antioxidants

From the experimental results of table 10, it can be seen that: compared with the commercially available compound antioxidant, the high-efficiency feed compound antioxidant has excellent antioxidant effect, the antioxidant protection time can be effectively prolonged to more than 60 days when the addition amount of the antioxidant is 0.15wt%, the antioxidant protection time of the preferred embodiment 8-16 can be prolonged to 70 days, and the feed is only slightly oxidized and deteriorated after being stored for 90 days. Meanwhile, the results of the above experiments show that the antioxidant protection effect of the high-efficiency feed composite antioxidant is far better than that of the antioxidant protection effect of the antioxidant protection agent which is singly doped with the dibutyl hydroxytoluene or the ethoxy quinoline.

2) Animal feeding test

0.2wt% of the complex antioxidant of example 1-16, the antioxidant of comparative example 1-2, ethoxyquinoline and dibutylhydroxytoluene were added to the complete formula feed sample of 0-4 weeks old chickens, respectively, to prepare a feed for testing. Selecting chickens with the age of 0 week as feeding objects, wherein the number of the chickens in each test group is more than or equal to 50. The chickens of each experimental group were fed three times with the same amount of experimental feed each day, and the amount of feed fed for each time was the same for each individual chicken. Recording the weight standard-reaching rate of the chicks after 4 weeks of age, and simultaneously recording the survival rate of the chicks. The weight of 4-week-old chicks reaches the standard: 450g for hens 380 and 690g for cocks 620 and. The results are reported in Table 11.

TABLE 11 animal feeding test results table

From the experimental data in table 11, it can be seen that: the high-efficiency feed composite antioxidant has excellent antioxidant protection effect and also has the effect of promoting the growth of raised animals, and as can be seen from the data of the examples 1 to 8, the feed doped with the antioxidant has the effects of promoting the weight gain of chickens and improving the survival rate of the chickens. And after the geniposide, the oleuropein and the liquorice extract are added in the preferred scheme, the weight standard-reaching rate and the survival rate of the chicks in the brooding period are obviously improved, and the effect is far better than the effect of the existing commercially available compound antioxidant or the effect of adding ethoxyquinoline and dibutyl hydroxy toluene independently as the antioxidant.

The above-mentioned embodiments are merely illustrative and not restrictive, and those skilled in the art can modify the above-mentioned embodiments as required after reading this specification without any inventive contribution, but only if the claims of the present invention are protected by patent laws.

Claims

1. The high-efficiency feed composite antioxidant is characterized in that: comprises the following components in percentage by weight,

ethoxy quinoline 2-22wt%

3-18wt% of dibutylhydroxytoluene

2-8wt% of synergist

0.5-3wt% of emulsifier

The balance being carriers.

2. The high-efficiency feed composite antioxidant as claimed in claim 1, which is characterized in that: the synergist comprises an acid agent and a chelating agent, wherein the mass ratio of the acid agent to the chelating agent is 1: (0.5-1).

3. The high-efficiency feed composite antioxidant as claimed in claim 2, which is characterized in that: the acid agent is one or more of phosphoric acid, citric acid, tartaric acid and fumaric acid.

4. The high-efficiency feed composite antioxidant as claimed in claim 2, which is characterized in that: the chelating agent is disodium ethylene diamine tetraacetate.

5. The high-efficiency feed composite antioxidant as claimed in claim 1, which is characterized in that: the emulsifier is one or more of fatty acid monoglyceride, soybean phospholipid, and fatty acid sorbitan ester.

6. The high-efficiency feed composite antioxidant as claimed in claim 1, which is characterized in that: the carrier comprises silicon dioxide and a diluting carrier, wherein the mass ratio of the silicon dioxide to the diluting carrier is 1: (0.5-1), wherein the diluting carrier is one or more of zeolite powder, acidic calcium sulfate, sodium metabisulfite and sodium bisulfite.

7. The high-efficiency feed composite antioxidant as claimed in any one of claims 1 to 6, which is characterized in that: comprises the following components in percentage by weight,

ethoxy quinoline 2-22wt%

3-18wt% of dibutylhydroxytoluene

2-8wt% of synergist

0.5-3wt% of emulsifier

Gardenoside 0.5-1wt%

Oleuropein 0.5-1wt%

Glycyrrhrizae radix extract 0.5-1wt%

The balance being carriers.

8. The preparation method of the high-efficiency feed composite antioxidant as claimed in claim 1, is characterized in that: comprises the following steps of (a) carrying out,

9. The preparation method of the high-efficiency feed composite antioxidant as claimed in claim 8, is characterized in that: comprises the following steps of (a) carrying out,

10. The preparation method of the high-efficiency feed compound antioxidant as claimed in claim 8 or 9, which is characterized in that: in the homogenizing step, a rotary or pressure homogenizing method is adopted to prepare a mixture of the dibutyl hydroxy toluene, the ethoxy quinoline, the emulsifier and the acid agent into a homogeneous fusion liquid.