CN114081104A - Cattle feed additive for improving immunity of cattle and feeding method thereof - Google Patents
Cattle feed additive for improving immunity of cattle and feeding method thereof Download PDFInfo
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Classifications
-
- 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
- A23K50/10—Feeding-stuffs specially adapted for particular animals for ruminants
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K67/00—Rearing or breeding animals, not otherwise provided for; New or modified breeds of animals
- A01K67/02—Breeding vertebrates
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23K—FODDER
- A23K10/00—Animal feeding-stuffs
- A23K10/10—Animal feeding-stuffs obtained by microbiological or biochemical processes
- A23K10/16—Addition of microorganisms or extracts thereof, e.g. single-cell proteins, to feeding-stuff compositions
-
- 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
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23K—FODDER
- A23K40/00—Shaping or working-up of animal feeding-stuffs
- A23K40/10—Shaping or working-up of animal feeding-stuffs by agglomeration; by granulation, e.g. making powders
-
- 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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Polymers & Plastics (AREA)
- Engineering & Computer Science (AREA)
- Zoology (AREA)
- Food Science & Technology (AREA)
- Animal Husbandry (AREA)
- Environmental Sciences (AREA)
- Physiology (AREA)
- Molecular Biology (AREA)
- Biotechnology (AREA)
- Microbiology (AREA)
- Health & Medical Sciences (AREA)
- Biochemistry (AREA)
- Biomedical Technology (AREA)
- Birds (AREA)
- Biodiversity & Conservation Biology (AREA)
- Animal Behavior & Ethology (AREA)
- Botany (AREA)
- Mycology (AREA)
- Medicines Containing Plant Substances (AREA)
- Fodder In General (AREA)
Abstract
The invention discloses a cattle feed additive for improving cattle immunity and a feeding method thereof, belonging to the field of feed additives and comprising the following raw materials: 5-10 parts of spirulina, 3-5 parts of houttuynia cordata, 4-8 parts of dried orange peel, 5-10 parts of isatis root, 2-5 parts of liquorice, 5-10 parts of radix ophiopogonis, 3-7 parts of eucommia ulmoides, 3-5 parts of hawthorn, 2-5 parts of ginkgo, 4-6 parts of lily, 4-8 parts of astragalus membranaceus, 3-5 parts of angelica sinensis and 4-6 parts of kadsura longepedunculata. The cattle feed additive and the concentrated feed are uniformly mixed according to the weight ratio of 1: 10-1: 30, and then the mixture is directly fed, the feeding process is continuously fed for 5 days and then stopped for 2 days, the circulation is carried out, the whole feeding period is 60 days, and water is freely drunk during the feeding period. The invention improves the immunity of cattle, enhances the disease resistance, balances the nutrition and has no chemical medicine residue.
Description
Technical Field
The invention relates to the field of feed additives, in particular to a cattle feed additive for improving the immunity of cattle and a feeding method thereof.
Background
At present, cattle are mainly raised in an intensive mode, during the process of raising cattle, farmers mostly use various local grasses, vegetables, agricultural and sideline products and work byproducts as feed, the raising mode is easily limited by sports fields, the feed is single, the health of cattle is affected, the yield and the quality of cow milk are reduced, the development of cattle raising industry is affected, therefore, various additives such as antibiotics, chemical synthetic drugs, vitamins, trace elements, hormones and the like are added into a plurality of feeds, the cattle raised by the additives generally have drug residues and side effects, and after people eat the beef, the cattle can cause drug resistance to drugs in human bodies and side effects to human bodies. Therefore, new cattle feed additives are required to be continuously developed, so that the cattle feed additives have higher nutritional values while reducing side effects and saving cost, and the cattle growth is promoted while the cattle constitution is also required to be enhanced and the diseases are reduced.
Disclosure of Invention
The invention aims to provide a cattle feed additive for improving the immunity of cattle and a feeding method thereof, and aims to solve the problems in the prior art.
In order to achieve the purpose, the invention provides the following scheme:
one of the schemes of the invention is to provide a cattle feed additive for improving the immunity of cattle, which comprises the following raw materials in parts by weight: 5-10 parts of spirulina, 3-5 parts of houttuynia cordata, 4-8 parts of dried orange peel, 5-10 parts of isatis root, 2-5 parts of liquorice, 5-10 parts of radix ophiopogonis, 3-7 parts of eucommia ulmoides, 3-5 parts of hawthorn, 2-5 parts of ginkgo, 4-6 parts of lily, 4-8 parts of astragalus membranaceus, 3-5 parts of angelica sinensis and 4-6 parts of kadsura longepedunculata.
Further, the cattle feed additive comprises the following raw materials in parts by weight: 6-8 parts of spirulina, 3-4 parts of houttuynia cordata, 5-7 parts of dried orange peel, 6-8 parts of isatis root, 3-4 parts of liquorice, 6-8 parts of radix ophiopogonis, 4-6 parts of eucommia ulmoides, 4-5 parts of hawthorn, 3-4 parts of ginkgo, 4-5 parts of lily, 5-7 parts of astragalus membranaceus, 3-4 parts of angelica sinensis and 4-5 parts of kadsura longepedunculata.
Furthermore, the cattle feed additive comprises the following raw materials in parts by weight: 7 parts of spirulina, 4 parts of houttuynia cordata, 6 parts of dried orange peel, 7 parts of isatis root, 4 parts of liquorice, 7 parts of dwarf lilyturf tuber, 5 parts of eucommia bark, 5 parts of hawthorn, 4 parts of ginkgo seed, 5 parts of lily, 6 parts of astragalus mongholicus, 4 parts of angelica sinensis and 5 parts of kadsura longepedunculata.
The second scheme of the invention provides a preparation method of the cattle feed additive for improving the immunity of cattle, which comprises the following steps:
(1) respectively cleaning and drying the raw materials in parts by weight, crushing and uniformly mixing;
(2) and (2) granulating the mixed raw materials in the step (1).
Furthermore, the raw materials in the step (1) are crushed and then screened by a 60-100-mesh sieve.
Further, the particles with the particle size of 1 mm-2 mm are prepared in the step (2).
The third scheme of the invention is to provide the feeding method of the cattle feed additive for improving the cattle immunity, and the cattle feed additive and the concentrated feed are mixed uniformly according to the weight part ratio of 1: 10-1: 30 and then fed directly.
Further, the cattle feed additive and the feed concentrate are mixed uniformly according to the weight ratio of 1:20 and then are fed directly.
Furthermore, in the feed additive feeding process, the feeding is stopped for 2 days after the continuous feeding is carried out for 5 days, the circulation is carried out, the whole feeding period is 60 days, and the water is freely drunk in the feeding period.
The spirulina is the most abundant and comprehensive organism with the most nutrient components in the nature, is rich in high-quality protein, fatty acid of gamma-linolenic acid, carotenoid, vitamins and various trace elements such as iron, iodine, selenium, zinc and the like, and has the regulation effect on a plurality of functions of animals.
Yu xing Cao is slightly cold in nature and pungent in flavor, and enters lung meridian. Has effects in clearing away heat and toxic materials, relieving carbuncle, expelling pus, promoting urination, and treating stranguria. Has antibacterial, antiviral, immunity enhancing and diuretic effects.
Tangerine peel, pericarpium Citri Tangerinae, with pungent and bitter taste and warm nature, enters spleen and lung meridians. Has the functions of regulating qi, stimulating appetite, eliminating dampness and phlegm, and treating spleen and stomach diseases. Has effects in regulating digestive system, relieving asthma, eliminating phlegm, enhancing immunity, and relieving inflammation.
Radix Isatidis is cold in nature and bitter in taste, and enters heart and stomach meridians. Has effects in clearing away heat and toxic materials, cooling blood, and relieving sore throat. Has antibacterial, antiviral, antiendotoxin, anticancer, and immunoregulatory effects.
Licorice root, radix Glycyrrhizae is neutral in nature and sweet in flavor, and enters heart, stomach, spleen and lung meridians. Invigorating spleen and replenishing qi, relieving cough and eliminating phlegm, relieving spasm and relieving pain, and harmonizing drug property. Has antiinflammatory, anticancer, antibacterial, antiviral, and immunity regulating effects.
Mai Dong is slightly cold in nature, sweet and slightly bitter in taste. They enter heart, lung and stomach meridians. Nourishing yin, promoting fluid production, moistening lung, and clearing away heart-fire. They belong to yin tonics classified under deficiency tonics. Has effect in protecting cardiovascular system; enhancing immune function; reducing blood sugar; delaying aging; inhibiting gastrointestinal propulsion; and (4) resisting bacteria.
Eucommia bark, cortex Eucommiae is warm in nature and sweet in taste, and enters liver and kidney meridians. Has blood pressure lowering effect; enhancing the immune function of the organism; has diuretic effect; has obvious analgesic and anti-inflammatory effects.
Haw is slightly warm in nature and sour and sweet in taste. It enters spleen, stomach and liver meridians. Promoting digestion, invigorating spleen, promoting qi circulation, and removing blood stasis. Has effects in promoting digestion, protecting cardiovascular system, lowering blood pressure, reducing blood lipid, resisting oxidation, enhancing immunity, resisting bacteria, preventing cancer, and relieving pain.
Ginkgo biloba is mild in nature, sweet, bitter and astringent in taste. It enters lung and kidney meridians. Has antibacterial, expectorant, free radical scavenging, blood pressure lowering, antitumor, immunity regulating, and lipid peroxidation resisting effects.
Lily is cold in nature and sweet in taste. They enter heart and lung meridians. Nourish yin and moisten lung, clear heart and calm nerves. Has antitussive, antiasthmatic, and expectorant effects; resistance to stress injury; tranquilizing and hypnotizing; enhancing immune function; the effect of increasing peripheral leukocytes, and the like.
Huang Qi is slightly warm in nature and sweet in taste. It enters spleen and lung meridians. Invigorating qi, consolidating superficial resistance, promoting urination, expelling toxin, expelling pus, and promoting granulation. Has promoting effect on nucleic acid metabolism; enhancing hematopoietic function; improving myocardial function, and resisting myocardial infarction; has antioxidant, antiviral, anticancer, renal function improving, and renal histopathological changes improving effects.
Dang Gui is warm in nature, sweet and pungent in flavor. It enters liver meridian, heart meridian and spleen meridian. Tonify blood, activate blood, regulate menstruation, alleviate pain, moisten intestines and relieve constipation. Has effects of reducing platelet aggregation and resisting thrombi; promoting hematopoietic system function; reducing blood lipid and resisting arteriosclerosis; oxidation resistance and free radical scavenging; enhancing immune system function; anti-tumor; anti-inflammatory and analgesic effects; protecting liver, promoting bile flow, promoting digestion, and inhibiting gastrointestinal motility; has effects in inhibiting nervous system, relaxing airway smooth muscle, promoting urination, and inhibiting bacteria.
Kadsura longepedunculata has warm nature and sour and sweet taste. It enters lung meridian, heart meridian and kidney meridian. Astringe, benefit qi, promote the production of body fluid, tonify kidney, and calm heart. The fructus Schisandrae polysaccharide has effects of protecting liver, resisting aging, resisting anoxia, and enhancing immunity.
Compared with the prior art, the invention has the following technical effects:
the spirulina is used as a main material, and can reduce blood fat, resist oxidation, infection, canceration, radiation and aging and enhance the immunity of the organism; the compound use of various natural Chinese herbal medicines improves the immunity of cattle, enhances the disease resistance, balances the nutrition and has no chemical medicine residue. The invention is all natural components, does not contain industrial inorganic compound components, does not cause burden to the cattle body, does not generate other toxic or side effects, does not remain in the body, and effectively improves the immunity and the antiviral level of the cattle body.
The feed additive and the conventional feed are matched to act mutually, so that the feed additive has the advantages of ensuring normal nutritional requirements, improving immunity, generating no toxic or side effect, generating no drug resistance, residue, phytotoxicity, environmental pollution, environmental friendliness and increasing the body resistance.
Detailed Description
Reference will now be made in detail to various exemplary embodiments of the invention, the detailed description should not be construed as limiting the invention but as a more detailed description of certain aspects, features and embodiments of the invention.
It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Further, for numerical ranges in this disclosure, it is understood that each intervening value, between the upper and lower limit of that range, is also specifically disclosed. Every smaller range between any stated value or intervening value in a stated range and any other stated or intervening value in a stated range is encompassed within the invention. The upper and lower limits of these smaller ranges may independently be included or excluded in the range.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Although only preferred methods and materials are described herein, any methods and materials similar or equivalent to those described herein can be used in the practice or testing of the present invention. All documents mentioned in this specification are incorporated by reference herein for the purpose of disclosing and describing the methods and/or materials associated with the documents. In case of conflict with any incorporated document, the present specification will control.
It will be apparent to those skilled in the art that various modifications and variations can be made in the specific embodiments of the present disclosure without departing from the scope or spirit of the disclosure. Other embodiments will be apparent to those skilled in the art from consideration of the specification. The specification and examples are exemplary only.
As used herein, the terms "comprising," "including," "having," "containing," and the like are open-ended terms that mean including, but not limited to.
The "parts" in the present invention are all parts by mass unless otherwise specified.
Example 1
A cattle feed additive for improving cattle immunity comprises the following raw materials in parts by weight: 5 parts of spirulina, 3 parts of houttuynia cordata, 4 parts of dried orange peel, 5 parts of isatis root, 2 parts of liquorice, 5 parts of dwarf lilyturf tuber, 3 parts of eucommia bark, 3 parts of hawthorn, 2 parts of ginkgo seed, 4 parts of lily, 4 parts of astragalus mongholicus, 3 parts of angelica sinensis and 4 parts of kadsura longepedunculata. The cattle feed additive and the concentrated feed are uniformly mixed according to the weight ratio of 1:30, and then the mixture is directly fed, the feeding process is continuously fed for 5 days and then stopped for 2 days, the circulation is carried out, the whole feeding period is 60 days, and water is freely drunk during the feeding period.
Example 2
A cattle feed additive for improving cattle immunity comprises the following raw materials in parts by weight: 10 parts of spirulina, 5 parts of houttuynia cordata, 8 parts of dried orange peel, 10 parts of isatis root, 5 parts of liquorice, 10 parts of dwarf lilyturf tuber, 7 parts of eucommia bark, 5 parts of hawthorn, 5 parts of ginkgo seed, 6 parts of lily, 8 parts of astragalus mongholicus, 5 parts of angelica sinensis and 6 parts of kadsura longepedunculata. The cattle feed additive and the concentrated feed are uniformly mixed according to the weight ratio of 1:10 and then are directly fed, the feeding process is continuously fed for 5 days and then stopped for 2 days, the circulation is carried out, the whole feeding period is 60 days, and water is freely drunk during the feeding period.
Example 3
A cattle feed additive for improving cattle immunity comprises the following raw materials in parts by weight: 6 parts of spirulina, 3 parts of houttuynia cordata, 5 parts of dried orange peel, 6 parts of isatis root, 3 parts of liquorice, 6 parts of dwarf lilyturf tuber, 4 parts of eucommia bark, 4 parts of hawthorn, 3 parts of ginkgo seed, 4 parts of lily, 5 parts of astragalus mongholicus, 3 parts of angelica sinensis and 4 parts of kadsura longepedunculata. The cattle feed additive and the concentrated feed are uniformly mixed according to the weight ratio of 1:25 and then are directly fed, the feeding process is continuously fed for 5 days and then stopped for 2 days, the circulation is carried out, the whole feeding period is 60 days, and water is freely drunk during the feeding period.
Example 4
A cattle feed additive for improving cattle immunity comprises the following raw materials in parts by weight: 8 parts of spirulina, 4 parts of houttuynia cordata, 7 parts of dried orange peel, 8 parts of isatis root, 4 parts of liquorice, 8 parts of dwarf lilyturf tuber, 6 parts of eucommia bark, 5 parts of hawthorn, 4 parts of ginkgo seed, 5 parts of lily, 7 parts of astragalus mongholicus, 4 parts of angelica sinensis and 5 parts of kadsura longepedunculata. The cattle feed additive and the concentrated feed are uniformly mixed according to the weight ratio of 1:15, and then the mixture is directly fed, the feeding process is continuously fed for 5 days and then stopped for 2 days, the circulation is carried out, the whole feeding period is 60 days, and water is freely drunk during the feeding period.
Example 5
A cattle feed additive for improving cattle immunity comprises the following raw materials in parts by weight: 7 parts of spirulina, 4 parts of houttuynia cordata, 6 parts of dried orange peel, 7 parts of isatis root, 4 parts of liquorice, 7 parts of dwarf lilyturf tuber, 5 parts of eucommia bark, 5 parts of hawthorn, 4 parts of ginkgo seed, 5 parts of lily, 6 parts of astragalus mongholicus, 4 parts of angelica sinensis and 5 parts of kadsura longepedunculata. The cattle feed additive and the concentrated feed are uniformly mixed according to the weight ratio of 1:20 and then are directly fed, the feeding process is continuously fed for 5 days and then stopped for 2 days, the circulation is carried out, the whole feeding period is 60 days, and water is freely drunk during the feeding period.
Example 6
The preparation method of the cattle feed additive for improving the immunity of cattle of the above examples 1 to 5 comprises the following steps:
(1) cleaning and drying the raw materials in parts by weight respectively, crushing, sieving by a 80-mesh sieve, and uniformly mixing;
(2) and (2) granulating the raw materials mixed in the step (1) to obtain granules with the particle size of 1 mm.
Example 7
The difference from example 6 is that after pulverization, the powder was passed through a 100-mesh sieve.
Example 8
The difference from example 6 is that granules having a particle size of 2mm were produced.
Animal experiments:
feeding control: cattle with similar body conditions, good health conditions and average weight of 400kg are divided into 6 groups, 10 cattle in each group, and a comparison test is carried out. Wherein, the test group adds the feed additive into the concentrated feed according to the weight portion of 1-5 of the embodiment; the blank control group was pure feed concentrate. Under the condition of consistent breeding environment, the expected test period of the test is 15 days, and after the formal period is 60 days, the bovine serum immunoglobulin IgG content, IgM content and IgA content are tested.
| IgG(mg/100mL) | IgM(mg/100mL) | IgA(mg/100mL) | |
| Example 1 | 102 | 28.1 | 17 |
| Example 2 | 103 | 28.3 | 17 |
| Example 3 | 105 | 28.7 | 18 |
| Example 4 | 106 | 28.9 | 18 |
| Example 5 | 108 | 29.6 | 20 |
| Blank control group | 87 | 23 | 14 |
The data obtained were analyzed in combination to obtain the following results: the bovine serum immunoglobulin IgG content, the bovine serum immunoglobulin IgM content and the bovine serum immunoglobulin IgA content of the embodiments 1 to 5 are all higher than those of a blank control group, the content is improved by 18 to 29 percent and is in a higher level, meanwhile, the effect of the embodiment 5 is obviously higher than that of the blank control group, the immunity of the organism is obviously improved, other inorganic compound components generating side effects are not added, and the burden on the cattle body is avoided.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.
Claims (9)
1. A cattle feed additive for improving the immunity of cattle is characterized in that: the cattle feed additive comprises the following raw materials in parts by weight: 5-10 parts of spirulina, 3-5 parts of houttuynia cordata, 4-8 parts of dried orange peel, 5-10 parts of isatis root, 2-5 parts of liquorice, 5-10 parts of radix ophiopogonis, 3-7 parts of eucommia ulmoides, 3-5 parts of hawthorn, 2-5 parts of ginkgo, 4-6 parts of lily, 4-8 parts of astragalus membranaceus, 3-5 parts of angelica sinensis and 4-6 parts of kadsura longepedunculata.
2. The cattle feed additive for improving immunity of cattle of claim 1, which is characterized in that: the cattle feed additive comprises the following raw materials in parts by weight: 6-8 parts of spirulina, 3-4 parts of houttuynia cordata, 5-7 parts of dried orange peel, 6-8 parts of isatis root, 3-4 parts of liquorice, 6-8 parts of radix ophiopogonis, 4-6 parts of eucommia ulmoides, 4-5 parts of hawthorn, 3-4 parts of ginkgo, 4-5 parts of lily, 5-7 parts of astragalus membranaceus, 3-4 parts of angelica sinensis and 4-5 parts of kadsura longepedunculata.
3. The cattle feed additive for improving immunity of cattle of claim 2, wherein: the cattle feed additive comprises the following raw materials in parts by weight: 7 parts of spirulina, 4 parts of houttuynia cordata, 6 parts of dried orange peel, 7 parts of isatis root, 4 parts of liquorice, 7 parts of dwarf lilyturf tuber, 5 parts of eucommia bark, 5 parts of hawthorn, 4 parts of ginkgo seed, 5 parts of lily, 6 parts of astragalus mongholicus, 4 parts of angelica sinensis and 5 parts of kadsura longepedunculata.
4. A method for preparing the cattle feed additive for improving the immunity of cattle according to any one of claims 1 to 3, which is characterized in that: the method comprises the following steps:
(1) respectively cleaning and drying the raw materials in parts by weight, crushing and uniformly mixing;
(2) and (2) granulating the mixed raw materials in the step (1).
5. The method for preparing the cattle feed additive for improving the immunity of cattle according to claim 4, which is characterized in that: and (2) crushing the raw materials in the step (1), and sieving the crushed raw materials with a 60-100-mesh sieve.
6. The method for preparing the cattle feed additive for improving the immunity of cattle according to claim 4, which is characterized in that: and (3) preparing particles with the particle size of 1-2 mm in the step (2).
7. A feeding method of the cattle feed additive for improving the immunity of cattle of claims 1 to 6, which is characterized in that: the cattle feed additive and the concentrated feed are uniformly mixed according to the weight part of 1: 10-1: 30 and then directly fed.
8. The method for feeding the cattle feed additive for improving the immunity of cattle according to claim 7, wherein the method comprises the following steps: the cattle feed additive and the concentrated feed are mixed uniformly according to the weight ratio of 1:20 and then fed directly.
9. The method for feeding the cattle feed additive for improving the immunity of cattle according to claims 7 to 8, which is characterized in that: in the feed additive feeding process, the feeding is stopped for 2 days after the continuous feeding is carried out for 5 days, the circulation is carried out, the whole feeding period is 60 days, and the water is freely drunk in the feeding period.
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