CN109043196A - It is a kind of for improve fattening pig lean meat percentage feed - Google Patents
It is a kind of for improve fattening pig lean meat percentage feed Download PDFInfo
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- CN109043196A CN109043196A CN201810989809.XA CN201810989809A CN109043196A CN 109043196 A CN109043196 A CN 109043196A CN 201810989809 A CN201810989809 A CN 201810989809A CN 109043196 A CN109043196 A CN 109043196A
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- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
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- A23K20/158—Fatty acids; Fats; Products containing oils or fats
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Abstract
The invention discloses a kind of for improving the feed of fattening pig lean meat percentage, it is related to field of feed, the technical problem that existing growing way is fast during fattening but lean meat percentage is low for solving growing and fattening pigs, it includes 45-60 parts of corn, 8-10 parts of wheat, 10 parts of dregs of beans, 1-1.5 parts of soya-bean oil, 5-8 parts of wheat bran, 4 parts of premix, 0.4-0.7 parts of calcium monohydrogen phosphate, 0.2-0.5 parts of inorganic salts, 10-12 parts of the fermentation sweet potato dregs of rich albumen, 0.04 part of curcumin, 5-10 parts of alfalfa meal, 0.06 part of green tea powder；The fermentation sweet potato dregs of the richness albumen include the high fermentation sweet potato dregs A of true protein content and high fermentation the sweet potato dregs B, the fermentation sweet potato dregs A of gross protein value and ferment sweet potato dregs B and added respectively with mass ratio 4-6:4-6；The present invention has the effect of improving feed palatability, protein content, enhancing growing and fattening pigs constitution, the lean meat percentage for improving growing and fattening pigs.
Description
Technical field
The present invention relates to a kind of feeds, more particularly to a kind of for improving the feed of fattening pig lean meat percentage.
Background technique
China is pig raising big country.53,400,000 t of pork yield in 2017 increases by 0.8% than last year, live pig livestock on hand 4.33 hundred million
Head, than last year decline 0.4%, live pig delivers 6.89 hundred million for sale, increases by 0.5% than last year.It can be seen that the feedstuff for live pigs of China
It is a huge market.Its growth course is divided into two stages, i.e. growth period and fattening period by the weight of pig, weight 20~
60 kilograms are growth period, this stage is mainly the growth of bone and muscle, and the comparison of the growth of fat is slow, 30~60kg's
Growing emphasis is bone and muscle；60 kilograms~deliver for sale for fattening period, precipitating of the growth emphasis for fat, the fat of this stage pig
Tissue growth is vigorous, and the growth of muscle and bone is more slow.
Growing and fattening pigs are commonly called as feeder pig, are that the speed of growth is most fast in life and consumes forage volume maximum period for pig, are raising pigs
In production, feed cost accounts for the 60~80% of production cost, and the feeding management in this stage is embodied directly in economic benefits.Now
The popularization of fattening pannage is typically all that the live pig feature for being directed to a certain stage and nutritional need are accounted for and promoted in the market.
As the important stage of pig-breeding economic benefit, needs in feed cost, delivers pig weight for sale, delivers pig lean meat percentage for sale, delivers pig for sale
Pork quality comprehensively consider, be equipped with reasonable feed ingredient proportion, just can reach the speed of growth faster, production performance is more
Height, meat is more preferable, and manufacturing cost is lower, and productivity effect is more preferable.
Summary of the invention
It is an object of the invention to: in order to solve the technology that the growing way existing for the growing and fattening pigs of fattening period is fast but lean meat percentage is low
Problem, the present invention provides a kind of absorption for being conducive to raising pig to protein, to improve the feed of fattening pig lean meat percentage.
The present invention specifically uses following technical scheme to achieve the goals above:
It is a kind of for improving the feed of fattening pig lean meat percentage, including corn, wheat, dregs of beans, soya-bean oil, wheat bran, premix, phosphorus
Sour hydrogen calcium and inorganic salts further include fermentation sweet potato dregs, curcumin, alfalfa meal and the green tea powder of rich albumen, in which: each component
Parts by weight are respectively 45-60 parts of corn, 8-10 parts of wheat, 10 parts of dregs of beans, 1-1.5 parts of soya-bean oil, 5-8 parts of wheat bran, premix 4
Part, 0.4-0.7 parts of calcium monohydrogen phosphate, 0.2-0.5 parts of inorganic salts, 10-12 parts of the fermentation sweet potato dregs of rich albumen, 0.04 part of curcumin,
5-10 parts of alfalfa meal, 0.06 part of green tea powder；The fermentation sweet potato dregs of the richness albumen include the high fermentation sweet potato of true protein content
Slag A and high fermentation the sweet potato dregs B, the fermentation sweet potato dregs A of gross protein value and fermentation sweet potato dregs B are with mass ratio 4-6:4-6
It adds respectively；
1) the sweet potato dregs inoculating compound bacterium agent A that the fermentation sweet potato dregs A is moisture content 55-60% ferments, compound bacteria
Agent A is made of candida utili, Candida lipolytica, Lactococcus lactis and aspergillus oryzae, inoculum concentration 0.5%-2%；
2) the fermentation sweet potato dregs B is with 10-14 parts of 85-90 parts of sweet potato dregs, wheat bran, the inorganic salts of moisture content 55-60%
0.08-0.09 parts, 0.8-0.9 parts of urea and 0.8-0.9 parts of ammonium sulfate are used as culture medium, are inoculated with the inoculum concentration of 0.5%-2%
Microbial inoculum B is combined, combination microbial inoculum B includes Endomycopsis Fibnligera, candida utili, trichoderma viride, saccharomycete and cellulose point
Solve bacterium.
Preferably, contain in the every 1kg of the premix: salt 0.4kg, iron 100mg, copper 20mg, zinc 100mg, manganese 75mg,
Iodine 0.70mg, selenium 0.30mg, vitamin A 0.36mg, vitamin B12mg, vitamin B20.04mg, vitamin D 0.08mg, dimension life
Plain E22mg, niacin 22mg, folic acid 1.3mg, biotin 0.8mg.
Preferably, the fermentation condition of the fermentation sweet potato dregs A is 28-32 DEG C of fermentation temperature, initial pH value 5.5, when fermentation
Between be 36-40h.
Preferably, the fermentation condition of the fermentation sweet potato dregs B is 30 DEG C of fermentation temperature, and initial pH is neutral, and fermentation time is
25-30h is dried under 40 DEG C of environment after fermentation.
Preferably, further include radix achyranthis bidentatae, be added in feed with one day 40-60g/ amount.
Growth period pig is transferred to when growing and fattening pigs are newly enclosed and should be noted: (1) cultivating good conditioned reflex, growth period pig is transferred to newly
Circle, it is understood that there may be the case where robbing food of fighting carries out the training of fixed point feeding, sleep, excretion to it, and it is anti-to form good condition
It penetrates, improves survival rate；(2) three times a day feed: morning, noon and at dusk respectively with 35%, 25% and 40% daily ration accounting into
Row feeding.
Beneficial effects of the present invention are as follows:
1. the fermentation sweet potato dregs accounting 10%-12% of rich albumen is helped to improve and is educated containing a large amount of protein in feed
The lean meat percentage of hog, meanwhile, main component is fresh or old sweet potato dregs, not only contributes to reduce feed cost, and to ecology
Environment will not pollute, the agricultural Model of composite green circulation；And sweet potato dregs have preferable palatability after fermenting, and are conducive to
The average daily consumption forage volume of growing and fattening pigs is improved, to improve its average daily increasing quality, i.e. shortening fattening time.
2. suitable curcumin, alfalfa meal, green tea powder and radix achyranthis bidentatae are added in feed, to adjust the enterobacteriaceae of growing and fattening pigs
Kind and enzyme.
3. curcumin, which has, inhibits mould, virus, the activity of fungi, bacterium, to Trichophyton rubrum, Staphylococcus aureus
Bacterium, Escherichia coli etc. have strong inhibiting effect, can also enhance the activity of phagocyte；To pig have improve enteron aisle, growth promotion,
The effect built up health and improved food conversion ratio.
4. and the conjunction of protein can be enhanced containing functional components such as oleanolic acid, ecdysterone, ephedrines in radix achyranthis bidentatae
At, while promoting deposition of the lipid material in adipose tissue, reparation and protective tissue cell improve the health status of body,
To coordinate the ingredient that other inhibit fat deposition, achieve the effect that improve the growth function of pig and the conversion ratio of feed.
5. green tea powder has tea polyphenols, chlorophyll, caffeine, amino acid, vitamins and other nutritious components, removed with gut purge
Oily, anti-oxidant, sterilization, anti-inflammatory effect, be conducive to the yellowish pink condition and lean meat percentage that improve pig, and reduce Fat Accumulation.
6. the fermentation sweet potato dregs of rich albumen, after everfermentation, content of cellulose reduces, added in feed alfalfa meal from
And ensure the intestines peristalsis of pig and improve its intestinal beneficial bacterium group structure, reduce the formation of fat.
Specific embodiment
In order to which those skilled in the art better understand the present invention, the present invention is made into one below with reference to following embodiment
Step detailed description.
Embodiment 1
The present embodiment provides a kind of for improving the feed of fattening pig lean meat percentage, including corn, wheat, dregs of beans, soya-bean oil, bran
Skin, premix, calcium monohydrogen phosphate and inorganic salts, further include fermentation sweet potato dregs, curcumin, alfalfa meal and the green tea powder of rich albumen,
Wherein: the parts by weight of each component are respectively 55 parts of corn, 8 parts of wheat, 10 parts of dregs of beans, 1 part of soya-bean oil, 5 parts of wheat bran, premix 4
Part, 0.4 part of calcium monohydrogen phosphate, 0.5 part of inorganic salts, 10 parts of the fermentation sweet potato dregs of rich albumen, 0.04 part of curcumin, 6 parts of alfalfa meal,
0.06 part of green tea powder；The fermentation sweet potato dregs of the richness albumen include that the high fermentation sweet potato dregs A of true protein content and thick protein contain
High fermentation sweet potato dregs B, the fermentation sweet potato dregs A is measured to add respectively with fermentation sweet potato dregs B with mass ratio 4:6；
The fermentation sweet potato dregs accounting 10% of rich albumen, containing a large amount of protein, helps to improve growing and fattening pigs in feed
Lean meat percentage, meanwhile, main component is fresh or old sweet potato dregs, not only contributes to reduce feed cost, and not to ecological environment
It will cause pollution, the agricultural Model of composite green circulation；And sweet potato dregs have preferable palatability after fermenting, and are conducive to improve and educate
The average daily consumption forage volume of hog, to improve its average daily increasing quality, i.e. shortening fattening time.
1) the fermentation sweet potato dregs A is that the sweet potato dregs inoculating compound bacterium agent A of moisture content 60% ferments, composite bacteria agent A
It is made of candida utili, Candida lipolytica, Lactococcus lactis and aspergillus oryzae, inoculum concentration 1%；
2) the fermentation sweet potato dregs B is with 0.08 part of 10 parts of 88 parts of sweet potato dregs, wheat bran, inorganic salts, the urea of moisture content 60%
0.9 part and 0.9 part of ammonium sulfate is used as culture medium, is inoculated with combination strain agent B with 1% inoculum concentration, combination microbial inoculum B includes in button capsule is quasi-
Spore is mould, candida utili, trichoderma viride, saccharomycete and cellulose-decomposing bacterium.
Preferably, contain in the every 1kg of the premix: salt 0.4kg, iron 100mg, copper 20mg, zinc 100mg, manganese 75mg,
Iodine 0.70mg, selenium 0.30mg, vitamin A 0.36mg, vitamin B12mg, vitamin B20.04mg, vitamin D 0.08mg, dimension life
Plain E22mg, niacin 22mg, folic acid 1.3mg, biotin 0.8mg, remaining is rice husk powder.
Preferably, the fermentation condition of the fermentation sweet potato dregs A is 32 DEG C of fermentation temperature, initial pH value 5.5, and fermentation time is
36h。
Preferably, the fermentation condition of the fermentation sweet potato dregs B is 30 DEG C of fermentation temperature, and initial pH is neutral, and fermentation time is
25h is dried under 40 DEG C of environment after fermentation.
Preferably, further include radix achyranthis bidentatae, be added in feed with one day 40g/ amount.
Influence of 1 embodiment of table, 1 feed formula to fattening thickness of fat and organism parameter
Embodiment 2
The present embodiment provides a kind of for improving the feed of fattening pig lean meat percentage, including corn, wheat, dregs of beans, soya-bean oil, bran
Skin, premix, calcium monohydrogen phosphate and inorganic salts, further include fermentation sweet potato dregs, curcumin, alfalfa meal and the green tea powder of rich albumen,
Wherein: the parts by weight of each component are respectively 50 parts of corn, 8 parts of wheat, 10 parts of dregs of beans, 1.5 parts of soya-bean oil, 6.5 parts of wheat bran, premix
Material 4 parts, 0.5 part of calcium monohydrogen phosphate, 0.4 part of inorganic salts, 11 parts of the fermentation sweet potato dregs of rich albumen, 0.04 part of curcumin, alfalfa meal 8
Part, 0.06 part of green tea powder；The fermentation sweet potato dregs of the richness albumen include the high fermentation sweet potato dregs A and thick protein of true protein content
Content high fermentation sweet potato dregs B, the fermentation sweet potato dregs A are added with fermentation sweet potato dregs B with mass ratio 5:5 respectively；
1) the fermentation sweet potato dregs A is that the sweet potato dregs inoculating compound bacterium agent A of moisture content 55% ferments, composite bacteria agent A
It is made of candida utili, Candida lipolytica, Lactococcus lactis and aspergillus oryzae, inoculum concentration 0.5%；
2) the fermentation sweet potato dregs B is with 0.09 part of 13 parts of 85.3 parts of sweet potato dregs, wheat bran, the inorganic salts of moisture content 55%, urine
0.8 part and 0.8 part of ammonium sulfate of element is used as culture medium, is inoculated with combination strain agent B with 0.5%% inoculum concentration, combination microbial inoculum B includes button
Capsule endomycopsi.sp, candida utili, trichoderma viride, saccharomycete and cellulose-decomposing bacterium.
Preferably, contain in the every 1kg of the premix: salt 0.4kg, iron 100mg, copper 20mg, zinc 100mg, manganese 75mg,
Iodine 0.70mg, selenium 0.30mg, vitamin A 0.36mg, vitamin B12mg, vitamin B20.04mg, vitamin D 0.08mg, dimension life
Plain E22mg, niacin 22mg, folic acid 1.3mg, biotin 0.8mg, remaining is rice husk powder.
Preferably, the fermentation condition of the fermentation sweet potato dregs A is 30 DEG C of fermentation temperature, initial pH value 5.5, and fermentation time is
40h。
Preferably, the fermentation condition of the fermentation sweet potato dregs B is 30 DEG C of fermentation temperature, and initial pH is neutral, and fermentation time is
30h is dried under 40 DEG C of environment after fermentation.
Preferably, further include radix achyranthis bidentatae, be added in feed with one day 50g/ amount.
Influence of 2 embodiment of table, 2 feed formula to fattening thickness of fat and organism parameter
Embodiment 3
The present embodiment provides a kind of for improving the feed of fattening pig lean meat percentage, including corn, wheat, dregs of beans, soya-bean oil, bran
Skin, premix, calcium monohydrogen phosphate and inorganic salts, further include fermentation sweet potato dregs, curcumin, alfalfa meal and the green tea powder of rich albumen,
Wherein: the parts by weight of each component are respectively 49 parts of corn, 10 parts of wheat, 10 parts of dregs of beans, 1 part of soya-bean oil, 5 parts of wheat bran, premix 4
Part, 0.6 part of calcium monohydrogen phosphate, 0.3 part of inorganic salts, 10 parts of the fermentation sweet potato dregs of rich albumen, 0.04 part of curcumin, alfalfa meal 10
Part, 0.06 part of green tea powder；The fermentation sweet potato dregs of the richness albumen include the high fermentation sweet potato dregs A and thick protein of true protein content
Content high fermentation sweet potato dregs B, the fermentation sweet potato dregs A are added with fermentation sweet potato dregs B with mass ratio 6:4 respectively；
The fermentation sweet potato dregs accounting 12% of rich albumen, containing a large amount of protein, helps to improve growing and fattening pigs in feed
Lean meat percentage, meanwhile, main component is fresh or old sweet potato dregs, not only contributes to reduce feed cost, and not to ecological environment
It will cause pollution, the agricultural Model of composite green circulation；And sweet potato dregs have preferable palatability after fermenting, and are conducive to improve and educate
The average daily consumption forage volume of hog, to improve its average daily increasing quality, i.e. shortening fattening time.
1) the fermentation sweet potato dregs A is that the sweet potato dregs inoculating compound bacterium agent A of moisture content 60% ferments, composite bacteria agent A
It is made of candida utili, Candida lipolytica, Lactococcus lactis and aspergillus oryzae, inoculum concentration 1.5%；
2) the fermentation sweet potato dregs B is with 0.08 part of 10 parts of 88 parts of sweet potato dregs, wheat bran, inorganic salts, the urea of moisture content 60%
0.8 part and 0.9 part of ammonium sulfate is used as culture medium, is inoculated with combination strain agent B with 1.5% inoculum concentration, combination microbial inoculum B includes that button capsule is quasi-
Endomyces, candida utili, trichoderma viride, saccharomycete and cellulose-decomposing bacterium.
Preferably, contain in the every 1kg of the premix: salt 0.4kg, iron 100mg, copper 20mg, zinc 100mg, manganese 75mg,
Iodine 0.70mg, selenium 0.30mg, vitamin A 0.36mg, vitamin B12mg, vitamin B20.04mg, vitamin D 0.08mg, dimension life
Plain E22mg, niacin 22mg, folic acid 1.3mg, biotin 0.8mg, remaining is rice husk powder.
Preferably, the fermentation condition of the fermentation sweet potato dregs A is 28 DEG C of fermentation temperature, initial pH value 5.5, and fermentation time is
38h。
Preferably, the fermentation condition of the fermentation sweet potato dregs B is 30 DEG C of fermentation temperature, and initial pH is neutral, and fermentation time is
28h is dried under 40 DEG C of environment after fermentation.
Preferably, further include radix achyranthis bidentatae, be added in feed with one day 55g/ amount.
Influence of 3 embodiment of table, 3 feed formula to fattening thickness of fat and organism parameter
The fermentation sweet potato dregs accounting 10%-12% of rich albumen helps to improve fattening containing a large amount of protein in feed
The lean meat percentage of pig, meanwhile, main component is fresh or old sweet potato dregs, not only contributes to reduce feed cost, and to ecological ring
Border will not pollute, the agricultural Model of composite green circulation；And sweet potato dregs have preferable palatability after fermenting, and are conducive to mention
The average daily consumption forage volume of high growing and fattening pigs, to improve its average daily increasing quality, i.e. shortening fattening time.
Suitable curcumin, alfalfa meal, green tea powder and radix achyranthis bidentatae are added in feed, to adjust the Intestinal flora of growing and fattening pigs
And enzyme.
Curcumin have inhibit mould, virus, the activity of fungi, bacterium, to Trichophyton rubrum, staphylococcus aureus,
Escherichia coli etc. have strong inhibiting effect, can also enhance the activity of phagocyte；Having to pig improves enteron aisle, growth promotion, increasing
Strong constitution and the effect improved food conversion ratio.
And the synthesis of protein can be enhanced containing functional components such as oleanolic acid, ecdysterone, ephedrines in radix achyranthis bidentatae,
Promote deposition of the lipid material in adipose tissue, reparation and protective tissue cell simultaneously, improves the health status of body, thus
Coordinate other ingredients for inhibiting fat deposition, achievees the effect that improve the growth function of pig and the conversion ratio of feed.
Green tea powder have tea polyphenols, chlorophyll, caffeine, amino acid, vitamins and other nutritious components, have gut purge oil removing,
Anti-oxidant, sterilization, anti-inflammatory effect, be conducive to the yellowish pink condition and lean meat percentage that improve pig, and reduce Fat Accumulation.
The fermentation sweet potato dregs of rich albumen after everfermentation, content of cellulose reduce, in feed add alfalfa meal to
It ensures the intestines peristalsis of pig and improves its intestinal beneficial bacterium group structure, reduce the formation of fat.
The above, only presently preferred embodiments of the present invention, are not intended to limit the invention, patent protection model of the invention
It encloses and is subject to claims, it is all to change with equivalent structure made by description of the invention, similarly should all include
Within the scope of the present invention.
Claims (6)
1. a kind of for improving the feed of fattening pig lean meat percentage, including corn, wheat, dregs of beans, soya-bean oil, wheat bran, premix, phosphoric acid
Hydrogen calcium and inorganic salts, which is characterized in that it further include fermentation sweet potato dregs, curcumin, alfalfa meal and the green tea powder of rich albumen,
In: the parts by weight of each component are respectively 45-60 parts of corn, 8-10 parts of wheat, 10 parts of dregs of beans, 1-1.5 parts of soya-bean oil, wheat bran 5-8
Part, 4 parts of premix, 0.4-0.7 parts of calcium monohydrogen phosphate, 0.2-0.5 parts of inorganic salts, 10-12 parts of the fermentation sweet potato dregs of rich albumen, turmeric
0.04 part of element, 5-10 parts of alfalfa meal, 0.06 part of green tea powder.
2. according to claim 1 for improving the feed of fattening pig lean meat percentage, which is characterized in that the hair of the richness albumen
Ferment sweet potato dregs include the high fermentation sweet potato dregs A of true protein content and the high fermentation sweet potato dregs B of gross protein value, and the fermentation is sweet
Potato slag A and fermentation sweet potato dregs B is added respectively with mass ratio 4-6:4-6；
The fermentation sweet potato dregs A is that the sweet potato dregs inoculating compound bacterium agent A of moisture content 55-60% ferments, and composite bacteria agent A is by producing
Protein Candida, Candida lipolytica, Lactococcus lactis and aspergillus oryzae are constituted, inoculum concentration 0.5%-2%；
The fermentation sweet potato dregs B is with 10-14 parts of 85-90 parts of sweet potato dregs, wheat bran, the inorganic salts 0.08-0.09 of moisture content 55-60%
Part, 0.8-0.9 parts of urea and 0.8-0.9 parts of ammonium sulfate are used as culture medium, are inoculated with combination strain agent B with the inoculum concentration of 0.5%-2%,
Combining microbial inoculum B includes Endomycopsis Fibnligera, candida utili, trichoderma viride, saccharomycete and cellulose-decomposing bacterium.
3. according to claim 1 for improving the feed of fattening pig lean meat percentage, which is characterized in that the premix is every
Contain in 1kg: salt 0.4kg, iron 100mg, copper 20mg, zinc 100mg, manganese 75mg, iodine 0.70mg, selenium 0.30mg, vitamin
A0.36mg, vitamin B12mg, vitamin B20.04mg, vitamin D 0.08mg, vitamin E2 2mg, niacin 22mg, folic acid
1.3mg, biotin 0.8mg.
4. according to claim 2 for improving the feed of fattening pig lean meat percentage, which is characterized in that the fermentation sweet potato dregs
The fermentation condition of A is 28-32 DEG C of fermentation temperature, initial pH value 5.5, fermentation time 36-40h.
5. according to claim 2 for improving the feed of fattening pig lean meat percentage, which is characterized in that the fermentation sweet potato dregs
The fermentation condition of B is 30 DEG C of fermentation temperature, and initial pH is neutral, fermentation time 25-30h, after fermentation under 40 DEG C of environment
Drying.
6. according to claim 1 for improving the feed of fattening pig lean meat percentage, which is characterized in that it further include radix achyranthis bidentatae, with
40-60g/ amounts are added in feed within one day.
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| CN201810989809.XA CN109043196A (en) | 2018-08-28 | 2018-08-28 | It is a kind of for improve fattening pig lean meat percentage feed |
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| CN201810989809.XA CN109043196A (en) | 2018-08-28 | 2018-08-28 | It is a kind of for improve fattening pig lean meat percentage feed |
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| CN201810989809.XA Pending CN109043196A (en) | 2018-08-28 | 2018-08-28 | It is a kind of for improve fattening pig lean meat percentage feed |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109907159A (en) * | 2019-04-03 | 2019-06-21 | 厦门汇承科技有限公司 | A kind of animal feed additive and its application |
| CN114468161A (en) * | 2022-02-25 | 2022-05-13 | 北京九州大地生物技术集团股份有限公司 | Fattening pig feed for producing selenium-rich pork and preparation method and feeding method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109907159A (en) * | 2019-04-03 | 2019-06-21 | 厦门汇承科技有限公司 | A kind of animal feed additive and its application |
| CN114468161A (en) * | 2022-02-25 | 2022-05-13 | 北京九州大地生物技术集团股份有限公司 | Fattening pig feed for producing selenium-rich pork and preparation method and feeding method thereof |
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