CN112841416A - Tannin-containing feed additive for resisting diseases, and preparation method and application thereof - Google Patents
Tannin-containing feed additive for resisting diseases, and preparation method and application thereof Download PDFInfo
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- CN112841416A CN112841416A CN202110097776.XA CN202110097776A CN112841416A CN 112841416 A CN112841416 A CN 112841416A CN 202110097776 A CN202110097776 A CN 202110097776A CN 112841416 A CN112841416 A CN 112841416A
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23K—FODDER
- A23K20/00—Accessory food factors for animal feeding-stuffs
- A23K20/10—Organic substances
- A23K20/111—Aromatic compounds
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23K—FODDER
- A23K10/00—Animal feeding-stuffs
- A23K10/30—Animal feeding-stuffs from material of plant origin, e.g. roots, seeds or hay; from material of fungal origin, e.g. mushrooms
- A23K10/37—Animal feeding-stuffs from material of plant origin, e.g. roots, seeds or hay; from material of fungal origin, e.g. mushrooms from waste material
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23K—FODDER
- A23K20/00—Accessory food factors for animal feeding-stuffs
- A23K20/10—Organic substances
- A23K20/105—Aliphatic or alicyclic compounds
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23K—FODDER
- A23K20/00—Accessory food factors for animal feeding-stuffs
- A23K20/10—Organic substances
- A23K20/142—Amino acids; Derivatives thereof
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23K—FODDER
- A23K20/00—Accessory food factors for animal feeding-stuffs
- A23K20/20—Inorganic substances, e.g. oligoelements
- A23K20/30—Oligoelements
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23K—FODDER
- A23K50/00—Feeding-stuffs specially adapted for particular animals
- A23K50/30—Feeding-stuffs specially adapted for particular animals for swines
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
- Y02P60/80—Food processing, e.g. use of renewable energies or variable speed drives in handling, conveying or stacking
- Y02P60/87—Re-use of by-products of food processing for fodder production
Abstract
The invention relates to a tannin-containing feed additive for resisting bacteria, a preparation method and application thereof, wherein the additive comprises the following components in parts by weight: 8 parts of a carrier; 4-6 parts of tannin; 0.5-0.8 part of phenylalanine; 0.3-0.5 part of tryptophan; 0.2-0.3 part of benzoic acid; 0.2-0.3 part of zinc benzoate; 0.3-0.5 part of zinc citrate and 0.05-0.1 part of glycerol. The tannin-containing feed additive has good antibacterial effect, and improves palatability, food resistance and anti-nutritional property.
Description
Technical Field
The invention relates to the field of feed additives, in particular to a tannin-containing anti-substitution feed additive and a preparation method thereof.
Background
The feed additive is a small amount or a trace amount of a substance added to a feed in order to satisfy the nutritional needs of animals, fully exert the productivity of the animals, improve the efficiency of the feed, and improve the quality of the feed. The dosage is usually a few percent to a few millionths, and although the dosage is micro, the effect is very large, the growth can be promoted, the yield of meat, eggs and milk can be improved, the feeding period can be shortened, the reproductive capacity can be improved, diseases can be reduced, and the feed cost can be reduced. According to different effects, the feed additive can be divided into two categories of nutrition and non-nutrition, and the nutritional feed additive is a nutrient substance which is contained in the supplementary feed but is insufficient in amount for the growth of animals such as amino acids, vitamins and minerals; the non-nutritive feed additive means a substance which is not originally contained in the feed and is added for various needs, for example, an antibacterial agent, a growth promoter, an antioxidant, a mildewproofing agent, an insect repellent, an enzyme agent, a microbial agent, a coloring agent, a flavoring agent, an anti-caking agent, an adhesive, and the like.
It is often necessary to add antimicrobial agents to inhibit the growth of harmful bacteria during the feeding of pigs. For example, piglets are weaned under weaning stress, including bacterial pathogens, oxidative stress and inflammatory responses, resulting in reduced growth performance, high mortality and morbidity, and therefore require the use of antibiotics to stop diarrhea and improve growth. However, some antibiotics are absorbed by animals and remain in meat, and are ingested by people, which directly damages human health. Studies have shown that antibiotics remaining in animal products cannot be completely inactivated by heating, and that some antibiotics, after degradation, also form more toxic or unknown substances. In addition, some feed antibiotics are discharged to the environment in the form of original shape or excrement, so that water sources and soil can be polluted, environment drug-resistant bacteria are cultured, environment microorganisms are killed, the drug resistance of bacteria is increased, and the ecological environment hidden danger is large.
With the banning and restriction of some antibiotics in feed additive products, antibiotic substitutes, i.e. replacement products, that can directly or indirectly act like antibiotics to inhibit pathogenic bacteria in the intestinal tract or to promote animal growth are receiving increasing attention. Existing anti-type additives include: acidifiers, microecologics, phytoantimicrobial ingredients, enzyme preparations, and the like, but the effectiveness of these antibiotic substitutes is somewhat different than antibiotics.
In recent years, tannin, a pure plant extract, has attracted attention in anti-bacterial additives, and has remarkable effects in the aspects of bacteriostasis, parasite resistance, inflammation resistance, oxidation resistance and the like. However, tannin has bitter taste and poor palatability, reacts with saliva protein to generate a food-blocking effect, and condensed tannin in plants such as sorghum easily forms a non-digestible compound with the protein and can be combined with outer cells of intestinal tracts, so that the permeability of intestinal walls is reduced, and the beverage has an anti-nutritional effect. In addition, the antibacterial effect of the existing tannin-containing feed additive still needs to be further improved.
Disclosure of Invention
The technical problem to be solved by the invention is how to provide the tannin-containing anti-substitution feed additive and the preparation method and application thereof, and the tannin-containing anti-substitution feed additive has good antibacterial effect and improves the problems of palatability, food resistance and anti-nutrition.
In order to solve the technical problems, the invention provides a tannin-containing anti-type feed additive which comprises the following components in parts by mass: 8 parts of a carrier; 4-6 parts of tannin; 0.5-0.8 part of phenylalanine; 0.3-0.5 part of tryptophan; 0.2-0.3 part of benzoic acid; 0.2-0.3 part of zinc benzoate; 0.3-0.5 part of zinc citrate and 0.05-0.1 part of glycerol. And optionally food-grade antioxidant.
Preferably, the tannin-containing feed additive comprises the following components in parts by weight: 8 parts of a carrier; 5 parts of tannin; 0.8 part of phenylalanine; 0.5 part of tryptophan; 0.2 part of benzoic acid; 0.2 part of zinc benzoate; 0.5 part of zinc citrate; 0.05 part of glycerol. .
Preferably, the carrier is at least one selected from soybean meal, wheat bran, corn flour, rice bran, rice hull powder and palm powder, and the particle size of the carrier is 1-5 mm.
Preferably, the tannin is a hydrolyzed tannin or a mixture of a hydrolyzed tannin and a condensed tannin.
Preferably, the hydrolysable tannin is selected from at least one of tara tannin, gallnut tannin.
Preferably, when the tannin is a mixture of a hydrolyzed tannin and a condensed tannin, the mass ratio of the hydrolyzed tannin to the condensed tannin is (1-10): 1; the condensed tannin is at least one selected from myricetin, cercis tannin and quebracho tannin.
The invention also provides a preparation method of the tannin-containing anti-type feed additive, which comprises the following steps: the method comprises the following steps: preparing a raw material of the tannin-containing feed additive for resisting the diseases according to any one of the schemes; step two: uniformly mixing the tannin and the glycerol, adding benzoic acid, uniformly mixing, adding phenylalanine and tryptophan, uniformly mixing, adding zinc benzoate and zinc citrate, and uniformly mixing; step three: and D, uniformly mixing the mixture obtained in the step two with the carrier.
Preferably, in the second step and the third step, all mixing steps are carried out at 45-55 ℃.
Preferably, the product obtained in step three is packaged in vacuum or inert gas packaging bags.
The invention also provides a tannin-containing anti-type feed additive: the tannin-containing feed additive for resisting swine feed prepared by the tannin-containing feed additive for resisting swine feed or the tannin-containing feed additive for resisting swine feed prepared by the method for preparing the tannin-containing feed additive for resisting swine feed according to any one of the above aspects is added to swine feed, and the addition amount of the tannin-containing feed additive for resisting swine feed is 0.1-5 g/kg.
The invention can obtain the following beneficial effects:
the invention provides a tannin-containing feed additive of a substitution-resistant type, which is characterized in that tannin is matched with phenylalanine, tryptophan, benzoic acid, zinc benzoate and zinc citrate in a formula, wherein the benzoic acid is used as an acidifier to improve the antibacterial property of the tannin and protect beneficial bacteria such as lactic acid bacteria; the phenylalanine and the tryptophan can form hydrogen bonds with the tannin, reduce the bitter taste of the tannin, improve the palatability of the feed, and reduce the composition of the tannin and protein, so that the food resistance and the anti-nutritional property of the tannin are improved, and in an acid system formed by the tannin and the benzoic acid, the stability of the phenylalanine and the tryptophan is improved and the phenylalanine and the tryptophan are not easy to oxidize and decompose; the zinc benzoate and the zinc citrate can provide zinc ions and can be connected with the tannin in a coordination manner, the bitter feeling of the tannin is further reduced, the palatability, the food resistance and the anti-nutritional property of the feed additive are improved, coordination can be formed between the zinc benzoate and the phenylalanine and the tryptophan, the stability of the phenylalanine and the tryptophan is improved, meanwhile, the zinc benzoate and the zinc citrate and benzoic acid and citric acid generated after zinc ions are exchanged by the zinc benzoate and the zinc citrate also have certain antibacterial performance, and trace element zinc can be supplemented. Preferably, the tannin is a hydrolysable tannin or is a predominantly hydrolysable tannin, reducing the anti-nutritional impact of the condensed tannin.
The preparation method of the tannin-containing anti-substitution feed additive comprises the steps of mixing glycerol and tannin to enable the surface of the tannin to be partially dissolved and sticky, then sequentially adding an acidifying agent, benzoic acid, amino acid and organic zinc compounds to be mixed to enable the tannin to be coated and improve the palatability, and finally mixing the tannin with a carrier, wherein the carrier is provided with micron-sized holes, hydroxyl groups and other groups which are easy to form hydrogen bonds, so that materials can be loaded on the carrier, the materials are dispersed more uniformly, and the palatability is further improved.
Detailed Description
The present invention will be described in further detail with reference to specific examples.
Example 1
The following raw materials were used in this example: 8 parts of soybean meal carrier with the diameter of 2 mm; 5 parts of gallnut tannin; 0.8 part of phenylalanine; 0.5 part of tryptophan; 0.2 part of benzoic acid; 0.2 part of zinc benzoate; 0.1 part of zinc citrate; 0.05 part of glycerol.
The preparation method comprises the following steps: preparing raw materials according to the raw material proportion; uniformly mixing tannin and glycerol at 55 ℃, adding benzoic acid, uniformly mixing, adding phenylalanine and tryptophan, uniformly mixing, adding zinc benzoate and zinc citrate, and uniformly mixing; and uniformly mixing the obtained mixture with the carrier.
Example 2
The following raw materials were used in this example: 8 parts of corn flour carrier with the diameter of 5 mm; 4 parts of tara tannin; 0.5 part of phenylalanine; 0.3 part of tryptophan; 0.3 part of benzoic acid; 0.2 part of zinc benzoate; 0.3 part of zinc citrate; 0.1 part of glycerol.
The preparation method comprises the following steps: preparing raw materials according to the raw material proportion; uniformly mixing tannin and glycerol at 45 ℃, adding benzoic acid, uniformly mixing, adding phenylalanine and tryptophan, uniformly mixing, adding zinc benzoate and zinc citrate, and uniformly mixing; and uniformly mixing the obtained mixture with the carrier.
Example 3
The following raw materials were used in this example: 8 parts of rice hull powder carrier with the diameter of 1 mm; 3 parts of gallnut tannin and 3 parts of quebracho tannin; 0.6 part of phenylalanine; 0.4 part of tryptophan; 0.2 part of benzoic acid; 0.2 part of zinc benzoate; 0.2 part of zinc citrate; 0.05 part of glycerol.
The preparation method comprises the following steps: preparing raw materials according to the raw material proportion; mixing tannin and glycerol at 50 deg.C, adding benzoic acid, mixing, adding phenylalanine and tryptophan, mixing, adding zinc benzoate and zinc citrate, and mixing; and uniformly mixing the obtained mixture with the carrier.
Comparative example 1
The comparative example used the following raw materials: 8 parts of soybean meal carrier with the diameter of 2 mm; 6 parts of gallnut tannin.
The preparation method comprises the following steps: preparing raw materials according to the raw material proportion; the tannin was mixed well with the carrier at 55 ℃.
Comparative example 2
The comparative example used the following raw materials: 8 parts of soybean meal carrier with the diameter of 2 mm; 5 parts of gallnut tannin; 0.8 part of phenylalanine; 0.5 part of tryptophan; 0.2 part of benzoic acid; 0.2 part of zinc benzoate; 0.1 part of zinc citrate.
The preparation method comprises the following steps: preparing raw materials according to the raw material proportion; uniformly mixing tannin and benzoic acid at 55 ℃, adding phenylalanine and tryptophan, uniformly mixing, adding zinc benzoate and zinc citrate, and uniformly mixing; and uniformly mixing the obtained mixture with the carrier.
Comparative example 3
The comparative example used the following raw materials: 8 parts of soybean meal carrier with the diameter of 2 mm; 5 parts of gallnut tannin; 1.3 parts of phenylalanine; 0.2 part of benzoic acid; 0.2 part of zinc benzoate; 0.1 part of zinc citrate; 0.05 part of glycerol.
The preparation method comprises the following steps: preparing raw materials according to the raw material proportion; uniformly mixing tannin and glycerol at 55 ℃, adding benzoic acid, uniformly mixing, adding phenylalanine, uniformly mixing, adding zinc benzoate and zinc citrate, and uniformly mixing; and uniformly mixing the obtained mixture with the carrier.
Comparative example 4
The comparative example used the following raw materials: 8 parts of soybean meal carrier with the diameter of 2 mm; 5 parts of gallnut tannin; 1.3 parts of cysteine; 0.2 part of benzoic acid; 0.2 part of zinc benzoate; 0.1 part of zinc citrate; 0.05 part of glycerol.
The preparation method comprises the following steps: preparing raw materials according to the raw material proportion; mixing tannin and glycerol at 55 deg.C, adding benzoic acid, mixing, adding cysteine, mixing, adding zinc benzoate and zinc citrate, and mixing; and uniformly mixing the obtained mixture with the carrier.
Comparative example 5
The comparative example used the following raw materials: 8 parts of soybean meal carrier with the diameter of 2 mm; 5 parts of gallnut tannin; 0.8 part of phenylalanine; 0.5 part of tryptophan; 0.2 part of zinc benzoate; 0.1 part of zinc citrate; 0.05 part of glycerol.
The preparation method comprises the following steps: preparing raw materials according to the raw material proportion; uniformly mixing tannin and glycerol at 55 ℃, adding phenylalanine and tryptophan, uniformly mixing, adding zinc benzoate and zinc citrate, and uniformly mixing; and uniformly mixing the obtained mixture with the carrier.
Comparative example 6
The comparative example used the following raw materials: 8 parts of soybean meal carrier with the diameter of 2 mm; 5 parts of gallnut tannin; 0.8 part of phenylalanine; 0.5 part of tryptophan; 0.2 part of benzoic acid; 0.3 part of zinc benzoate; 0.05 part of glycerol.
The preparation method comprises the following steps: preparing raw materials according to the raw material proportion; uniformly mixing tannin and glycerol at 55 ℃, adding benzoic acid, uniformly mixing, adding phenylalanine and tryptophan, uniformly mixing, adding zinc benzoate, and uniformly mixing; and uniformly mixing the obtained mixture with the carrier.
Comparative example 7
The following raw materials were used in this example: 8 parts of soybean meal carrier with the diameter of 2 mm; 5 parts of gallnut tannin; 0.8 part of phenylalanine; 0.5 part of tryptophan; 0.2 part of benzoic acid; 0.3 part of zinc citrate; 0.05 part of glycerol.
The preparation method comprises the following steps: preparing raw materials according to the raw material proportion; mixing tannin and glycerol at 55 deg.C, adding benzoic acid, mixing, adding phenylalanine and tryptophan, mixing, adding zinc citrate, and mixing; and uniformly mixing the obtained mixture with the carrier.
The feed additives prepared in the examples and comparative examples were subjected to an application effect evaluation test in daily ration for weaned piglets.
Test time: 10 months in 2020.
Test site: shandong Linyi Junuo county Bainuo farm
The 96 24-day-old weaned piglets are randomly divided into 12 groups according to male parents, varieties and weights, and 8 piglets are repeated in each group. The test time is 15 days.
Control group: feeding basic ration.
Antibiotic group: same amount of basal diet + 15% aureomycin (0.5g/kg), 50% quinocetone (0.1g/kg), zinc oxide (0.5 g/kg).
The anti-feed additive group: the same amount of base ration + alternative anti-feed additive of examples and comparative examples (2 g/kg).
The test results are shown in table 1 below:
table 1 application effect evaluation test results
The test result shows that: compared with a control group, the antibiotic replacement feed additive group and the antibiotic replacement feed additive group can improve the feed intake and daily gain of piglets and reduce the diarrhea rate, and the antibiotic replacement feed additive has better effects of improving the feed intake and daily gain and reducing the diarrhea rate. The antibiotic replacement feed additive can effectively replace antibiotics, reduce the diarrhea rate of weaned pigs, and improve the feed intake and growth speed of the piglets.
The comparison between the examples and the comparative examples shows that the formula and the preparation method of the invention can better improve the antibacterial effect, reduce diarrhea, improve the palatability, the food resistance and the anti-nutritional property of the feed additive and improve the feed intake and the weight gain. Comparative example 1 mixing tannin directly with the carrier resulted in poor palatability of the feed, affecting feed intake and weight gain, and limited antimicrobial effect. Comparative example 2 does not use glycerin to wet the tannin powder first, so that other materials cannot be coated or adhered on the tannin, and the problems of poor palatability of the tannin and the like cannot be improved well. Comparative example 5 does not use benzoic acid, and the antibacterial effect becomes poor. Comparative examples 3 and 4 do not adopt phenylalanine and tryptophan to be matched, the effect is poor, the water solubility of amino acid is probably related, and the matching effect of phenylalanine and tryptophan is better. Comparative examples 6 and 7 do not adopt the combination of zinc benzoate and zinc citrate, the effect is slightly poor, the coexistence of the zinc benzoate and the zinc citrate can influence the ionization of zinc ions, more zinc ions are promoted to be coordinated and combined with tannin and the like, and the improvement effect on the tannin is improved.
Finally, it should be emphasized that the above-described embodiments are merely examples of the present invention, and not intended to limit the invention, and any modifications, equivalents, improvements, etc. made within the scope of the claims of the present invention should be included in the scope of the present invention.
Claims (10)
1. The tannin-containing anti-type feed additive is characterized by comprising the following components in parts by weight:
8 parts of a carrier;
4-6 parts of tannin;
0.5-0.8 part of phenylalanine;
0.3-0.5 part of tryptophan;
0.2-0.3 part of benzoic acid;
0.1-0.2 parts of zinc benzoate;
0.1-0.3 part of zinc citrate;
0.05-0.1 part of glycerol.
2. The tannin-containing feed additive for resisting tannin as claimed in claim 1, which is characterized by comprising the following components in parts by mass:
8 parts of a carrier;
5 parts of tannin;
0.8 part of phenylalanine;
0.5 part of tryptophan;
0.2 part of benzoic acid;
0.2 part of zinc benzoate;
0.1 part of zinc citrate;
0.05 part of glycerol.
3. The tannin-containing feed additive for resisting tannin as claimed in claim 1 or 2, which is characterized by comprising the following components in parts by mass: the carrier is selected from at least one of soybean meal, wheat bran, corn flour, rice bran, rice hull powder and palm powder, and the particle size of the carrier is 1-5 mm.
4. A tannin-containing feed additive of the anti type according to claim 1 or 2, wherein: the tannin is hydrolyzed tannin or mixture of hydrolyzed tannin and condensed tannin.
5. The tannin-containing feed additive of the anti type as claimed in claim 4, wherein: the hydrolyzed tannin is at least one selected from tara tannin and gallnut tannin.
6. The tannin-containing feed additive of the anti type as claimed in claim 4, wherein: when the tannin is a mixture of hydrolyzed tannin and condensed tannin, the mass ratio of the hydrolyzed tannin to the condensed tannin is (1-10): 1; the condensed tannin is at least one selected from myricetin, cercis tannin and quebracho tannin.
7. A preparation method of tannin-containing anti-type feed additive is characterized by comprising the following steps:
the method comprises the following steps: a tannin-containing feed additive preparation material for anti-cancer animals according to any one of claims 1 to 6;
step two: uniformly mixing tannin and glycerol, adding benzoic acid, uniformly mixing, adding phenylalanine and tryptophan, uniformly mixing, adding zinc benzoate and zinc citrate, and uniformly mixing;
step three: and D, uniformly mixing the mixture obtained in the step two with the carrier.
8. The method for preparing a tannin-containing feed additive of anti-tannin type according to claim 7, wherein the method comprises the following steps: in the second step and the third step, all mixing steps are carried out at the temperature of 45-55 ℃.
9. The method for preparing a tannin-containing feed additive of a substitution type according to claim 7 or 8, wherein: and (4) packaging the product obtained in the third step in a vacuum or inert gas packaging bag.
10. The application of the tannin-containing feed additive for resisting the diseases is characterized in that: the tannin-containing feed additive for swine prepared by the method for preparing the tannin-containing feed additive for swine according to any one of claims 1 to 6 or 7 to 9 is added to the feed for swine, wherein the addition amount of the tannin-containing feed additive for swine is 0.1 to 5 g/kg.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114468134A (en) * | 2022-03-22 | 2022-05-13 | 五峰宏盛科技有限公司 | Galla chinensis feed additive and preparation method thereof |
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| CN107125440A (en) * | 2016-02-29 | 2017-09-05 | 湖南晶天科技实业有限公司 | A kind of feed addictive enteric coating tannic acid and preparation method thereof and a kind of feed |
| CN107712353A (en) * | 2017-11-10 | 2018-02-23 | 王芳 | A kind of feed addictive for preventing diarrhea of pigs and preparation method and application |
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2021
- 2021-01-25 CN CN202110097776.XA patent/CN112841416A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107125440A (en) * | 2016-02-29 | 2017-09-05 | 湖南晶天科技实业有限公司 | A kind of feed addictive enteric coating tannic acid and preparation method thereof and a kind of feed |
| CN107712353A (en) * | 2017-11-10 | 2018-02-23 | 王芳 | A kind of feed addictive for preventing diarrhea of pigs and preparation method and application |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114468134A (en) * | 2022-03-22 | 2022-05-13 | 五峰宏盛科技有限公司 | Galla chinensis feed additive and preparation method thereof |
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