CN103053846A - Special unconventional protein compound duck feed for meat ducks of fattening period - Google Patents
Special unconventional protein compound duck feed for meat ducks of fattening period Download PDFInfo
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- 241000272525 Anas platyrhynchos Species 0.000 title claims abstract description 126
- 235000013372 meat Nutrition 0.000 title claims abstract description 78
- 102000004169 proteins and genes Human genes 0.000 title claims abstract description 70
- 108090000623 proteins and genes Proteins 0.000 title claims abstract description 70
- 150000001875 compounds Chemical class 0.000 title claims abstract description 41
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- 102000004190 Enzymes Human genes 0.000 claims abstract description 25
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims abstract description 24
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- 229960003284 iron Drugs 0.000 claims description 2
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 claims description 2
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Abstract
The invention relates to a special unconventional protein compound duck feed for meat ducks of a fattening period, belonging to special feeds for specific animals. According to the special unconventional protein compound duck feed, a raw material formula is low in corn content, does not contain bean dregs, fish meal and meat and bone meal and consists of the following raw materials in parts by mass: 0.05-0.3 part of compound enzyme preparation, 10-40 parts of corn, 20-50 parts of wheat, 4-8 parts of corn protein feed, 6-9 parts of grain stillage, 3-7 parts of citric acid sludge, 3-6 parts of feed corn protein powder, 1-5 parts of peanut meal, 1-3 parts of germ meal, 1-4 parts of cottonseed meal, 1-3 parts of rapeseed meal, 1-3 parts of mountain meal, 0-1.5 parts of feather meal, 1.0-1.4 parts of lysine, 0.5-1.1 parts of calcium hydrophosphate, 0-1 part of fat, 0.28-0.33 part of salt, 0.1-0.15 part of threonine, 0-0.5 part of methionine and 0.5 part of premix material; and the special unconventional protein compound duck feed is prepared through the steps of mixing the raw materials to be uniform, carrying out heat treatment at the temperature of 85-90 DEG C, and then pelleting. The prepared special unconventional protein compound duck feed for the meat ducks of the fattening period is applicable to the daily feed supplying of fattening-period meat ducks of 6 to 7 weeks old.
Description
Technical field
The present invention is the compound duck feed of unconventional protein of a kind of fattening period meat duck special use.The feed that belongs to special-purpose particular animal.
Background technology
Duck is tasty, nutritious, contains the nutritional labelings such as rich in protein and fat, carbohydrate, calcium, phosphorus, iron.The whole processed food of the meat ducks such as roast duck, pressed salted duck, scented tea duck, it is deeply popular to people that duck head, duck neck, duck's foot are made respectively food; In addition, cutting apart duck, freezing, dry-salt Duck Products comes into the market to sell in a large number.Duck is one of large, edible wide Main Foods of human amount as pork, chicken.And demand has the trend that rises year by year.
The meat duck has that formation speed is fast, resistance against diseases is strong and with the poultry chicken relatively to characteristics such as roughage are adaptable, be easy to raise.Therefore, according to the market demand, meat duck aquaculture development is rapid.
Along with the development of aquaculture, closely-related fleshy duck fodder production technology has welcome new challenge with it.Traditional conventional protein feed is take corn, dregs of beans, meat meal tankage, fish meal as primary raw material, the grain that these raw material sources are depended on for existence in the mankind, and the animal/vegetable proteins such as meat bone and fish, and the source face is narrow, and demand is large; Cause fleshy duck fodder protein raw materials shortage of resources.
In recent years, some has monopolized the soybean squeezing enterprise more than 60% than large enterprises, they have formed from plantation, import and export, futures, be worked into the tank oil terminal has formed an industrial chain, cause as the important component dregs of beans purchasing channel in the conventional protein raw materials of duck feed not smooth, and market continues soaring for commodity price, bring significant cost pressure for the duck Feedstuff Enterprises, have to improve the selling price of duck feed, keep Business survival.
The lifting of duck feed price has increased the financial burden of duck aquaculture, has seriously restricted the development with the closely-related meat duck of people's livelihood aquaculture, substitutes conventional protein raw material with unconventional protein raw material imperative.
If in the protein raw material of duck feed, do not comprise the conventional protein components such as dregs of beans, fish meal, meat meal tankage, all technical of prepared unconventional protein duck feed product is difficult to reach the technical indicator of conventional protein raw material duck feed.Unconventional protein feed of the prior art remain be of low nutritive value, nutritional labeling is uneven, contain the defective such as multiple ANFs.
The poultry duck has dividing of meat duck and egg duck.Wherein, the growth and development stage of meat duck usually be divided into brood time, growth period and the stage of fattening three phases.Go out to be referred to as brood time shell～2 ages in week, be referred to as growth period 3～5 ages in week; Be referred to as the stage of fattening 6～7 ages in week.There is notable difference at different growth and development stages in the meat duck to the demand of various nutrition.
Fattening period meat duck bone and muscle growth are vigorous, and outside the subcutaneous fat fast growth, especially the chest muscle speed of growth is very fast.Absolute gain is in top period, and feed intake increases greatly, and digestive function is sound, and the body weight increase is very fast, and energy requirement is large.Therefore, the fattening period fleshy duck fodder, protein level is lower than brood time, and energy level should suitably improve.
Therefore, comprehensive nutrition, compatibility is reasonable, and the special feed that is suitable for the raising of fattening period meat duck is that meat duck breeding enterprise is expected.Not yet see for the feed of fattening period meat duck special use at present.
In addition, the brewery industry device produces a large amount of waste residues in the production process; In these waste residues, amino acid content is abundant, is valuable protein resource.The feather of the bird of bird product processing enterprise by-product also is rich in protein, amino acid.The two does not all obtain fully, rationally utilizes, and unordered discharging is namely wasted resource, again contaminated environment.Remain to administer, develop.
Summary of the invention
The object of the invention is to avoid above weak point of the prior art, and provide a kind of and substitute the conventional protein raw materials such as dregs of beans in the conventional protein feed, meat meal tankage, fish meal fully, the corn consumption is less; Nutritional labeling comprehensively, be easy to digest and assimilate, the compound duck feed of unconventional protein of fattening period meat duck special use that the nutritional labeling utilization rate is high, solve the problem of conventional albumen chicken feedstuff shortage of resources, with the animal/vegetable protein resource of saves valuable, reduce the fleshy duck fodder cost.
The present invention also aims to waste residue and the poultry feather hydrolysis powder of the discharging of brewery industry device are used for the fleshy duck fodder composition of raw materials, turn waste into wealth energy savings, protection of the environment.
Purpose of the present invention can reach by following measure:
The compound duck feed of unconventional protein of fattening period meat duck of the present invention special use is characterized in that in the composition of raw materials that corn content is low and do not contain dregs of beans, fish meal and meat meal tankage, is made by following raw material in mass fraction:
Described complex enzyme formulation is comprised of dextranase, zytase and wheat type complex enzyme;
Described premix comprises vitamin A, vitamin D, vitamin E, vitamin K, Cobastab
1, Cobastab
2, Cobastab
6, biotin, folic acid, copper, iron, manganese, zinc.
The present inventor is according to the demand of fattening period meat duck to nutrition, adopt the unconventional protein components such as wheat, peanut meal, Cottonseed Meal, cottonseed protein, the plumule dregs of rice to replace dregs of beans of the prior art, fish meal, meat meal tankage fully, and reduced the proportioning weight portion of corn fractions; Utilize enzyme preparation to the resistance to elevated temperatures of the enzyme preparation that adopts in the strong catalytic action of biochemical reaction and the component, greatly improved energy and protein and the amino acid whose biology effective rate of utilization of unconventional protein component; With the waste residue that brewery industry produces, introduce duck feed formula of the present invention, realized the hope of energy savings, protection of the environment, reduction cost; Add again and can promote the meat duck components such as necessary amino acid, trace element of growing in growth period.So that each component in the prescription mutually remedies, mutually replenishes, mutually coordinates, the effect stack, produced beyond thought technique effect, solved that unconventional protein feed of the prior art exists be of low nutritive value, the unbalanced problem of nutritional labeling, avoided the negative effect that brings because containing multiple ANFs; Nutritional labeling comprehensively, be easy to digest and assimilate, be suitable for fattening period meat duck edible.Thereby finished the present invention.
Purpose of the present invention can also reach by following measure:
The compound duck feed of unconventional protein of fattening period meat duck of the present invention special use, the parts by weight of the various enzymes of composition complex enzyme formulation are as follows in the described composition of raw materials:
Dextranase 0.02～0.16
Zytase 0.02～0.16
Wheat type complex enzyme 0.02～0.16.
Studies show that, enzyme preparation has many favorable factors to the growth of fattening period meat duck, such as the ANFs in degraded and the elimination feed; Improve the utilization rate of digestible energy, metabolizable energy and other nutrients of feed; Promote the growth of beneficial bacterium and suppress growing of harmful bacteria, and then adjust the microecological balance of poultry fattening period meat duck enteron aisle.
Heat-resisting complex enzyme formulation can be degraded simultaneously, and multiple substrate is multiple ANFs and multiple nutritional components in the diet, the utilization rate of the nutriments such as improving to greatest extent Dietary Energy, protein and starch that can act synergistically.
Selecting of complex enzyme formulation of the present invention brought into play important function to finishing task of the present invention.
The compound duck feed of unconventional protein of fattening period meat duck of the present invention special use, the parts by weight of the various enzymes of composition complex enzyme formulation are as follows in the described composition of raw materials:
Dextranase 0.05
Zytase 0.02～0.16
Wheat type complex enzyme 0.02～0.16.
It is preferred technical scheme.
The compound duck feed of unconventional protein of fattening period meat duck of the present invention special use is characterized in that described premix, comprises following component in the per kilogram premix:
Above premix material component although content is not high, for improving fattening period meat duck resistance against diseases, is grown up healthy and sound and is played irreplaceable effect
The compound duck feed of unconventional protein of fattening period meat duck of the present invention special use is characterized in that described feather hydrolysis powder is the feather hydrolysis powder of poultry feather behind highly pressured hydrolysis of bird product processing enterprise by-product.
Energy and the metabolic rate thereof of finding the feather hydrolysis powder during the inventor detects are suitable with dregs of beans; The absorption rate of the protein in the feather hydrolysis powder obviously is better than dregs of beans and meat meal tankage; Effective threonine and methionine content in the feather hydrolysis powder are higher than dregs of beans, fish meal and meat meal tankage; The feather hydrolysis powder always must amino acid whose apparent metabolic rate be significantly higher than dregs of beans, fish meal and meat meal tankage.Find simultaneously, feather can thoroughly destroy the space structure of feather keratinous protein through the hydrolysis of water under high pressure solution, makes it to be converted into the soluble protein that is easy to as the broiler chicken absorption.Therefore, the feather hydrolysis powder participates in the component of feed of the present invention as the albumen powder component, and for the quality of the compound duck feed of unconventional protein that improves fattening period meat duck of the present invention special use, energy savings, protection of the environment have been brought into play important function.
The compound duck feed of unconventional protein of fattening period meat duck of the present invention special use is characterized in that described citric acid waste is the waste residue of citric acid industry process units discharging.
In the waste residue of Citric Acid Production device discharging, amino acid content is abundant, is valuable protein resource.The present invention is introduced into the compound duck feed of unconventional protein of fattening period meat duck special use, as prepared using, for economize on resources, protection of the environment, made contribution.
The compound duck feed of unconventional protein of fattening period meat duck of the present invention special use is characterized in that described alcohol grain is through fermenting the maize alcohol lees that discharges in the preparation alcohol industry process take corn as raw material.The present invention is introduced into the compound duck feed of unconventional protein of fattening period meat duck special use, and is same as prepared using, for economize on resources, protection of the environment, contribute.
The compound duck feed of unconventional protein of fattening period meat duck of the present invention special use is characterized in that in the composition of raw materials that corn content is low and do not contain dregs of beans, fish meal and meat meal tankage, is made by following raw material in mass fraction:
It is preferred technical scheme.
The compound duck feed of unconventional protein of fattening period meat duck of the present invention special use is characterized in that in the composition of raw materials that corn content is low and do not contain dregs of beans, fish meal and meat meal tankage, is made by following raw material in mass fraction:
It is a preferred technical scheme.
The preparation method of the compound duck feed of unconventional protein of fattening period meat duck of the present invention special use is characterized in that the raw meal that will respectively handle well is broken to the micron order granularity, and is for subsequent use; Then, according to drafting each component of prescription accurate-metering, mixing, granulation under 85 ℃ of-90 ℃ of temperature; Product reaches following technical indicator:
Crude protein 〉=15.0%,, crude fat 〉=3.0%, crude fibre≤6.0%, coarse ash≤8.0%, calcium 0.70-1.20%, total phosphorus 〉=0.50%, salt 0.30-0.80%, methionine 〉=0.36%.
The purposes of the compound duck feed of unconventional protein of fattening period meat duck of the present invention special use is characterized in that providing daily ration for the fattening period meat duck in 6～7 ages in week.
The present inventor fully takes into account fattening period meat duck bone, muscle growth is vigorous, the subcutaneous fat fast growth, and especially the chest muscle speed of growth is very fast.Many physilogical characteristics such as absolute gain is in top period, and feed intake increases greatly, and digestive function is sound, and the body weight increase is very fast, and energy requirement is large.Design high-energy of the present invention and nutritional labeling and be easy to absorbed special-purpose daily ration, for being fattening period meat duck body makeup energy rapidly, build up health, improve immunity, the enhancing development of body, obtained beyond thought technique effect.
The compound duck feed of unconventional protein of fattening period meat duck of the present invention special use has following significant technique effect compared to existing technology:
1. provide a kind of and substituted the conventional protein raw materials such as dregs of beans in the conventional protein feed, meat meal tankage, fish meal fully, the corn consumption is less; Nutritional labeling comprehensively, be easy to digest and assimilate, the compound duck feed of unconventional protein of fattening period meat duck special use that the nutritional labeling utilization rate is high, solve the problem of conventional albumen chicken feedstuff shortage of resources, with the animal/vegetable protein resource of saves valuable, reduce the fleshy duck fodder cost.
2. waste residue and the poultry feather hydrolysis powder with the discharging of brewery industry device is used for the fleshy duck fodder composition of raw materials, turns waste into wealth energy savings, protection of the environment.
3. employing complex enzyme formulation is regulated recipe ingredient and content, overcome effectively that unconventional protein feed exists be of low nutritive value, nutritional labeling is uneven, contain the defective such as multiple ANFs;
4. the compound duck feed of unconventional protein of fattening period meat duck of the present invention special use, all technical is as follows;
Crude protein 〉=15.0%,, crude fat 〉=3.0%, crude fibre≤6.0%, coarse ash≤8.0%, calcium 0.70-1.20%, total phosphorus 〉=0.50%, salt 0.30-0.80%, methionine 〉=0.36%.
Reached the technical standard of conventional protein raw material.
5. be suitable for 3-5 fattening period daily grain of meat duck in age in week and supply with,
The specific embodiment
The present invention will now be further detailed embodiment:
Embodiment 1
The compound duck feed of unconventional protein for preparing the special use of a kind of fattening period meat duck of the present invention
According to drafting prescription, accurately take by weighing prior processing and be crushed to 0.05 kilogram of the dextranase of micron order granularity, 0.1 kilogram of zytase, 0.05 kilogram of wheat type complex enzyme, 32.32 kilograms of corns, 35 kilograms of wheats, 6 kilograms of maize gluten feeds, 6 kilograms of alcohol grains, 3 kilograms of citric acid wastes, feed corn protein powder 3,2 kilograms of peanut meals, 3 kilograms of the plumule dregs of rice, 1 kilogram of Cottonseed Meal, 1.2 kilograms of the dish dregs of rice, 1.62 kilograms of stone flours, 1.5 kilograms of feather meals, 1.07 kilograms of lysines, 0.78 kilogram of calcium monohydrogen phosphate, 0.68 kilogram of grease, 0.31 kilogram of salt, 0.13 kilogram of threonine, 0.14 kilogram of methionine, 0.5 kilogram of premix; Mixing, under 85 ℃ of-90 ℃ of temperature after the heat treatment, granulation.
Make the compound duck feed of unconventional protein of fattening period meat duck of the present invention special use, product reaches following technical indicator:
Crude protein 〉=15.0%,, crude fat 〉=3.0%, crude fibre≤6.0%, coarse ash≤8.0%, calcium 0.70-1.20%, total phosphorus 〉=0.50%, salt 0.30-0.80%, methionine 〉=0.36%.For 6～7 the week ages fattening period meat duck daily ration is provided.
Embodiment 2-8
According to method and the step of embodiment 1, according to the prescription of table 1, prepare the compound duck feed of unconventional protein of fattening period meat duck of the present invention special use
Table 1
| Raw material | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 | Embodiment 6 | Embodiment 7 | Embodiment 8 |
| Dextranase | 0.02 | 0.05 | 0.06 | 0.05 | 0.05 | 0.02 | 0.06 |
| Zytase | 0.1 | 0.08 | 0.08 | 0.1 | 0.08 | 0.1 | 0.08 |
| The wheat type complex enzyme | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 |
| Corn | 25.12 | 29.95 | 29.8 | 34.1 | 29.9 | 26.0 | 29.0 |
| Wheat | 38 | 32.5 | 34.68 | 28.4 | 31.55 | 37.4 | 34.68 |
| Maize gluten feed | 7 | 8 | 6 | 6.8 | 8 | 7 | 7 |
| Vinasse | 6 | 6 | 6 | 7 | 6 | 6 | 6 |
| Citric acid waste | 3 | 4 | 4 | 5 | 4. | 3 | 4 |
| Albumen powder | 3.5 | 3 | 3 | 3.1 | 3 | 3.5 | 3 |
| Peanut meal | 1 | 3 | 2 | 1.2 | 3 | 1 | 2 |
| The plumule dregs of rice | 3 | 3 | 3 | 3 | 3 | 3 | 3 |
| Cotton dregs | 1 | 1 | 1 | 1.3 | 1 | 1 | 1 |
| The dish dregs of rice | 3 | 3 | 3 | 2 | 3 | 3 | 3 |
| Feather meal | 1.5 | 0.78 | 1.3 | 1.3 | 0.78 | 1.5 | 1.3 |
| Grease | 3.2 | 2.8 | 3.1 | 2.8 | 3.2 | 3.0 | 2.9 |
| Stone flour | 2.03 | 1.03 | 1.1 | 1.32 | 1.03 | 2.03 | 1.1 |
| Calcium bicarbonate | 0.5 | 0.52 | 0.52 | 0.52 | 1.1 | 0.5 | 0.52 |
| Salt | 0.36 | 0.30 | 0.37 | 0.36 | 0.32 | 0.36 | 0.37 |
| Lysine | 1 | 0.33 | 0.32 | 1 | 0.33 | 1 | 0.32 |
| Threonine | 0.05 | 0.05 | 0.06 | 0.04 | 0.05 | 0.05 | 0.06 |
| Methionine | 0.02 | 0.01 | 0.01 | 0.01 | 0.01 | 0.02 | 0.01 |
| Premix | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 |
Make the compound duck feed of unconventional protein of fattening period meat duck of the present invention special use, product reaches following technical indicator:
Crude protein 〉=15.0%,, crude fat 〉=3.0%, crude fibre≤6.0%, coarse ash≤8.0%, calcium 0.70-1.20%, total phosphorus 〉=0.50%, salt 0.30-0.80%, methionine 〉=0.36%.For 6～7 the week ages fattening period meat duck daily ration is provided.
Claims (11)
1. the compound duck feed of unconventional protein of fattening period meat duck special use is characterized in that in the composition of raw materials that corn content is low and do not contain dregs of beans, fish meal and meat meal tankage, is made by following raw material in mass fraction:
Described complex enzyme formulation is comprised of dextranase, zytase and wheat type complex enzyme;
Described premix comprises vitamin A, vitamin D, vitamin E, vitamin K, Cobastab
1, Cobastab
2, Cobastab
6, biotin, folic acid, copper, iron, manganese, zinc.
2. according to the compound duck feed of unconventional protein of the fattening period meat duck special use of claim 1, the parts by weight of various enzymes that it is characterized in that forming in the described composition of raw materials complex enzyme formulation are as follows:
Dextranase 0.02～0.16
Zytase 0.02～0.16
Wheat type complex enzyme 0.02～0.16.
3. according to the compound duck feed of unconventional protein of the fattening period meat duck special use of claim 2, the parts by weight of various enzymes that it is characterized in that forming in the described composition of raw materials complex enzyme formulation are as follows:
Dextranase 0.05
Zytase 0.02～0.16
Wheat type complex enzyme 0.02～0.16.
4. according to the compound duck feed of unconventional protein of the fattening period meat duck special use of claim 1, it is characterized in that described premix, comprise following component in the per kilogram premix:
5. according to the compound duck feed of unconventional protein of the fattening period meat duck special use of claim 1, it is characterized in that described feather hydrolysis powder is the feather hydrolysis powder of poultry feather behind highly pressured hydrolysis of bird product processing enterprise by-product.
6. according to the compound duck feed of unconventional protein of the fattening period meat duck special use of claim 1, it is characterized in that described citric acid waste is the waste residue of citric acid industry process units discharging.
7. according to the compound duck feed of unconventional protein of the fattening period meat duck special use of claim 1, it is characterized in that described alcohol grain be take corn as raw material through fermentation, the maize alcohol lees that discharges in the preparation alcohol industry process.
8. according to the compound duck feed of unconventional protein of the fattening period meat duck special use of claim 1, it is characterized in that in the composition of raw materials that corn content is low and do not contain dregs of beans, fish meal and meat meal tankage, made by following raw material in mass fraction:
9. according to the compound duck feed of unconventional protein of the fattening period meat duck special use of claim 1, it is characterized in that in the composition of raw materials that corn content is low and do not contain dregs of beans, fish meal and meat meal tankage, made by following raw material in mass fraction:
10. the preparation method of the compound duck feed of unconventional protein of the fattening period meat duck special use of a claim 1 is characterized in that the raw meal that will respectively handle well is broken to the micron order granularity, and is for subsequent use; Then, according to drafting each component of prescription accurate-metering, mixing, granulation under 85 ℃ of-90 ℃ of temperature; Product reaches following technical indicator:
Crude protein 〉=15.0%,, crude fat 〉=3.0%, crude fibre≤6.0%, coarse ash≤8.0%, calcium 0.70-1.20%, total phosphorus 〉=0.50%, salt 0.30-0.80%, methionine 〉=0.36%.
11. the purposes of the compound duck feed of unconventional protein of the fattening period meat duck special use of a claim 1 is characterized in that providing daily ration for the fattening period meat duck in 6～7 ages in week.
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| CN103549209A (en) * | 2013-11-11 | 2014-02-05 | 山东新希望六和集团有限公司 | Two-stage meat duck compound feed and preparation method thereof |
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| CN104304705A (en) * | 2014-09-15 | 2015-01-28 | 凤台县靳氏禽业有限公司 | Corn root containing nutritious feed for meat ducks and preparation method thereof |
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| CN106472848A (en) * | 2015-08-26 | 2017-03-08 | 河北乐寿农牧集团股份有限公司 | Roast duck base feedstuff and preparation method thereof |
| CN106472847A (en) * | 2015-08-26 | 2017-03-08 | 河北乐寿农牧集团股份有限公司 | Meat-type duck later stage mixed feed and preparation method thereof |
| CN106689684A (en) * | 2016-12-09 | 2017-05-24 | 安徽天泽饲料有限责任公司 | Fertilizer for improving growing-stage meat duck meat quality |
| CN109699841A (en) * | 2018-12-14 | 2019-05-03 | 湖南九鼎科技（集团）有限公司 | The inexpensive nonreactive environment-protecting feed of the secondary fattening stage of one boar |
| CN110024918A (en) * | 2019-05-24 | 2019-07-19 | 青岛天普阳光饲料有限公司 | A kind of fleshy duck fodder and preparation method thereof |
| CN115067436A (en) * | 2022-08-22 | 2022-09-20 | 山东畜牧兽医职业学院 | Preparation method of special feed additive for breeding fattening meat ducks |
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