CN114794318A - Feed for improving content of polyunsaturated fatty acid in animal milk and preparation method thereof - Google Patents

Feed for improving content of polyunsaturated fatty acid in animal milk and preparation method thereof Download PDF

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CN114794318A
CN114794318A CN202110084538.5A CN202110084538A CN114794318A CN 114794318 A CN114794318 A CN 114794318A CN 202110084538 A CN202110084538 A CN 202110084538A CN 114794318 A CN114794318 A CN 114794318A
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feed
milk
dry matter
polyunsaturated fatty
omega
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王加启
张养东
郑楠
黄国欣
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Institute of Animal Science of CAAS
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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
    • A23K50/10—Feeding-stuffs specially adapted for particular animals for ruminants
    • 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
    • A23K10/12—Animal feeding-stuffs obtained by microbiological or biochemical processes by fermentation of natural products, e.g. of vegetable material, animal waste material or biomass
    • 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
    • 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
    • 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
    • A23K10/38—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 from distillers' or brewers' waste
    • 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
    • A23K20/158—Fatty acids; Fats; Products containing oils or fats
    • 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
    • A23K20/174—Vitamins
    • 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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Abstract

The invention discloses a feed for improving omega-3 polyunsaturated fatty acid in animal milk, which comprises flaxseed, wherein the flaxseed accounts for 5-9% (DM) of the total weight of dry matter of the feed. The core ingredients of the feed are the addition amount of the flaxseed and the crushed flaxseed, and the content of the omega-3 polyunsaturated fatty acid in the milk is adjusted through the proper addition amount and the processing mode of the flaxseed. Animal experiments repeated for a long time show that the omega-3 polyunsaturated fatty acid in milk can be improved by adding the linseed into daily ration of the dairy cow. After ration at the rates described in this study, the omega-3 polyunsaturated fatty acid content in milk was significantly increased, with the increase in omega-3 polyunsaturated fatty acid content in milk by crushing flaxseed being most significant.

Description

Feed for improving content of polyunsaturated fatty acid in animal milk and preparation method thereof
Technical Field
The invention belongs to the field of animal feeds, and particularly relates to a feed for improving the content of omega-3 polyunsaturated fatty acid in animal milk, and a preparation method and application thereof.
Background
Today, people pay more and more attention to food safety and health on the basis of nature and safety. Since humans living in inland have a small amount of polyunsaturated fatty acids obtained from marine fishes and microorganisms, the acquisition of polyunsaturated fatty acids from terrestrial plants is one of the major routes for inland population. The milk is one of the most comprehensive nutritional foods, can supplement various nutrients such as protein, vitamins and carbohydrates required by a human body, and is relatively lack of omega-3 polyunsaturated fatty acid. It was found that addition of oilseeds containing omega-3 polyunsaturated fatty acids to dairy cattle diets such as: flaxseed, perilla seed, evening primrose seed, etc., can increase the content of omega-3 polyunsaturated fatty acid in milk. The milk containing omega-3 polyunsaturated fatty acid can be used for supplementing omega-3 polyunsaturated fatty acid.
The research shows that the palmitic acid (C18:0) and the above fatty acid in the milk are absorbed and converted in the blood, and when the fatty acid content in the milk is increased, the fatty acid content in the blood is increased. Studies have shown that when the composition and concentration of fatty acids in milk are changed, especially when the proportion of unsaturated fatty acids in milk is increased, the oxidative stability of the fatty acids in milk is reduced, and thus the oxidative and antioxidant systems in milk fat are unbalanced, resulting in spontaneous oxidation of milk. The oxidation of milk fat can cause food spoilage, change the flavor of the food and loss of nutrients. Milk is a complex biological product, and contains many factors that exert antioxidant and/or pro-oxidant effects. There are many factors that affect the oxidation of milk lipids, including light, temperature, etc., and in addition, subsequent processing and storage of milk has a profound effect on the progress of milk fat oxidation.
Therefore, the influence of oxidation of fatty acid composition and lipid oxidation in milk is discussed by adding linseed to daily ration, and a theoretical basis is provided for further researching how to optimize the fatty acid composition in milk and improving the oxidation stability of the fatty acid in milk.
Disclosure of Invention
In order to improve the technical problems, the invention aims to provide a feed for increasing the content of omega-3 polyunsaturated fatty acids (including alpha-linolenic acid (ALA), eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA)) in animal milk, and a preparation method and application thereof.
In order to achieve the purpose, the technical scheme of the application is as follows:
a feed for increasing omega-3 polyunsaturated fatty acids in animal milk, the feed comprising flaxseed in a proportion of 5-9% (DM%), preferably 5.9-7.2% (DM%), more preferably 6.1-6.8% (DM%), based on the total weight of dry matter of the feed.
According to an embodiment of the invention, the feed further comprises an energy component, which energy component represents 27-30% (DM%), preferably 28.5-29.5% (DM%) of the total weight of the feed dry matter.
According to an embodiment of the invention, the feed further comprises a protein component, said protein component constituting 18-21% (DM%), preferably 19.5-20.7% (DM%) of the total weight of the dry matter of the feed.
According to an embodiment of the invention, the feed further comprises coarse material, said coarse material constituting 36-38% (DM%), preferably 36.4-37.4% (DM%) of the total weight of dry matter of the feed.
According to an embodiment of the invention, the feed further comprises additives and premix, said additives and premix representing 6-9% (DM%), preferably 7-8% (DM%) of the total weight of dry matter of the feed, wherein the mass ratio of premix and additives is 2-4:1, preferably 2.8: 1.
According to an embodiment of the invention, the energy component comprises 20-22% (DM%) of ground corn, 2-4% (DM%) of flaked corn, 1-3% (DM%) of cottonseed, 1-2% (DM%) of fat powder and 0.5-2% (DM%) of bran, based on 100% of the total dry matter of the feed. Preferably, the energy component comprises 21-21.2% (DM) of ground corn, 2.3-3.4% (DM) of flaked corn, 1.4-2.5% (DM) of wool seed, 1.4-1.7% (DM%) of fat powder and 1-1.2% (DM) of bran.
According to an embodiment of the invention, the protein component comprises 43% of soybean meal 11-13% (DM%), puffed soybean 2-2.8% (DM%), cottonseed meal 2.8-3.8% (DM%) and distillers grains DDGS 2.2-3.5% (DM%), based on 100% of the total dry matter of the feed. Preferably, the protein component comprises 43 bean pulp 11.3-12.3% (DM%), puffed soybean 2-2.5% (DM%), cottonseed 3-3.3% (DM%), and distillers grains DDGS 2.7-3.1% (DM%).
According to an embodiment of the invention, the coarse fodder comprises corn silage 20-23% (DM%), alfalfa hay 7-9% (DM%), semi-dry alfalfa silage 3-4% (DM%), and wrapped straw silage 1-3% (DM%), based on 100% of the total dry matter of the fodder. Preferably, the coarse material comprises corn silage 20.86-22.86% (DM%), alfalfa hay 8.9% (DM%), semi-dry alfalfa silage 3.7% (DM%), wrapped straw silage 2.5% (DM%).
According to an embodiment of the invention, the dry matter of the feed comprises 6-7% flaxseed, 28-30% of the energy component, 19-21% of the protein component, 36-38% of the coarse material, 7-8.8% of the additives and premix, based on 100% of the total dry matter of the feed. Preferably, the dry matter of the feed comprises flaxseed 6.1-6.8%, energy component 28.5-29.5%, protein component 19.6-20.7%, coarse material 36.4-37.4%, additives and premix 7-8%.
According to an embodiment of the invention, the premix comprises at least 300000-350000IU of vitamin A, 100000-150000IU of vitamin D, 4500-5500IU of vitamin E, 820mg of copper 700-820mg, 820mg of iron 700-820mg, 820mg of manganese 700-820mg, 5000mg of zinc 3000-5000mg, 20-50mg of selenium, 40-60mg of iodine and 50-70mg of cobalt per kilogram of dry matter of the premix. Preferably vitamin A313500 IU, vitamin D104500IU, vitamin E5000 IU, copper 780mg, iron 780mg, manganese 780mg, zinc 3900mg, selenium 30mg, iodine 50mg and cobalt 65 mg.
According to an embodiment of the invention, the nutritional composition of the feed is as follows: the total nutrient content is calculated by 100 percent, 17 to 18 percent of crude protein CP, 19 to 20 percent of acid washing fiber ADF, 78 to 67 percent of neutral washing fiber NDF64, and 4 to 5 percent of crude fat CP; the feed has a net lactation energy of 1-21Mcal per kg dry matter. Preferably, the nutrient content of the feed is as follows: the total nutrient content is calculated by 100 percent, 17.3 to 17.6 percent of crude protein CP, 19.1 to 19.5 percent of acid detergent fiber ADF, 65.2 to 66.2 percent of neutral detergent fiber NDF and 4.1 to 4.6 percent of crude fat CP; the feed has a net lactation energy of 1.9-19.8Mcal per kg dry matter.
According to an embodiment of the invention, polyunsaturated fatty acids such as linoleic acid (C18:2cis-9,12) and alpha-linolenic acid (C18:3cis-9,12,15(ALA)) are comprised in the feed.
According to an embodiment of the invention, the feed comprises linoleic acid (C18:2cis-9,12) 20-30% and alpha-linolenic acid (C18:3cis-9,12,15(ALA)) 20-30% by weight of total fatty acids contained in the feed; preferably, the composition comprises 25-29% of linoleic acid (C18:2cis-9,12) and 25-29% of alpha-linolenic acid (C18:3cis-9,12,15 (ALA)); more preferably, it comprises linoleic acid (C18:2cis-9,12) 26-27% and alpha-linolenic acid (C18:3cis-9,12,15(ALA)) 27-28%.
According to an embodiment of the invention, the feed further comprises one, two or more of the following: butyric acid (C4:0), caproic acid (C6:0), caprylic acid (C8:0), capric acid (C10:0), undecylenic acid (C11:0), dodecanoic acid (C12:0), tridecanoic acid (C13:0), tetradecanoic acid (C14:0), cis-9 tetradecenoic acid (C14:1n5), pentadecanoic acid (C15:0), cis-10 pentadecanoic acid (C15:1n5), hexadecanoic acid (C5: 0), cis-9 hexadecenoic acid (C5: 1n5), heptadecacarbonic acid (C5: 0), cis-10 heptadecaenoic acid (C5: 1n5), octadecanoic-carbonic acid (C5: 0), trans-9 octadecanoic acid (C5: 1n9) 5, cis-9 octadecanoic acid (C5: 1n9), trans-12 octadecanoic acid/trans-5 (C5: 5), cis-5, C5: 5, C5: 5, gamma-5, 5/trans-linolenic acid (C5: 5, C5: 5, gamma-5/C5, C5: 5/C5, gamma-5: 5, C5, gamma-5, C5: 5, C5/C5, gamma-5, C9, C5, C3/C5, C3/C3, and gamma-2, C3/C, Cis 11 eicosenoic acid (C20:1), heneicosanoic acid (C21:0), cis 11,14 eicosadienoic acid (C20:2), docosahexanoic acid (C22:0), cis 8,11,14 eicosatrienoic acid (C20:3n6), cis 13 docosahexenoic/erucic acids (C22:1n9), cis 11,14,17 eicosatrienoic acid (C20:3n3), cis 5,8,11,14 eicosatetraenoic/arachidonic acid/ARA (C20:4n6), tricosa acid (C23:0), cis 13,16 docosadienoic acid (C22:2n6), tetracosaenoic acid (C24:0), cis 5,8,11,14,17 eicosapentaenoic acid (EPA) (C20:5n3) and cis 4,7,10,13,16,19 docosahexaenoic acid (C22: 3).
The invention also provides a preparation method of the feed, which comprises the following specific steps:
uniformly mixing the flaxseeds, the energy component, the protein component, the coarse material, the additive and the premix to prepare the feed. The animal daily ration is prepared according to the proper proportion among the flaxseeds, the energy component, the protein component, the coarse material, the additive and the premix.
According to an embodiment of the invention, the flaxseed is raw or processed to a material with a particle size of 0.1-1 mm.
The invention also provides the application of the feed in feeding milk-producing animals, and the feed is used for feeding the milk-producing animals including cattle, sheep and other milk-producing animals.
According to an embodiment of the invention, the milk produced by the milk producing animal comprises omega-3 polyunsaturated fatty acids, such as alpha-linolenic acid (ALA), eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA).
According to an embodiment of the invention, the milk produced by the dairy animal has a content of omega-3 polyunsaturated fatty acids, including alpha-linolenic acid (ALA), eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), of 0.5-1.5%, for example 0.5-0.8% or 0.9-1.3% by weight of total fatty acids.
The invention has the beneficial effects that:
generally, the omega-3 polyunsaturated fatty acid is not added into daily ration, the content of the omega-3 polyunsaturated fatty acid in animal milk is low, the omega-3 polyunsaturated fatty acid in the milk mainly comes from the daily ration, the inventor takes measures aiming at obtaining the content of the omega-3 polyunsaturated fatty acid in different milks, flax seeds added into the daily ration are treated, the release of the omega-3 polyunsaturated fatty acid in the milk of the flax seeds is adjusted, and the content of the omega-3 polyunsaturated fatty acid in the milk is increased.
(1) The invention is divided into high and low contents according to the requirement on the content of omega-3 polyunsaturated fatty acid in milk, and corresponding feeds are applied to different contents, namely low content of omega-3 polyunsaturated fatty acid in milk and high content of omega-3 polyunsaturated fatty acid in milk.
(2) According to the invention, energy components and coarse raw materials are selected and matched, and linseed is selected as a source of omega-3 polyunsaturated fatty acid in milk; when the nutritional requirements of the dairy cows are ensured, the content of omega-3 polyunsaturated fatty acid in daily ration is increased, the amount of the omega-3 polyunsaturated fatty acid entering intestinal tracts is increased, and the content of the omega-3 polyunsaturated fatty acid in milk is increased.
(3) The core ingredients of the feed are the addition amount of the flaxseed and the crushed flaxseed, and the content of the omega-3 polyunsaturated fatty acid in the milk is adjusted through the proper addition amount and the processing mode of the flaxseed. Animal experiments repeated for a long time show that the omega-3 polyunsaturated fatty acid in milk can be improved by adding the linseed into daily ration of the dairy cow. After preparing the ration at the ratios described in this study, the omega-3 polyunsaturated fatty acid content in milk was significantly increased, with the increase in omega-3 polyunsaturated fatty acid content in milk by crushing flaxseed being most significant.
Detailed Description
The technical solution of the present invention will be further described in detail with reference to specific embodiments. It is to be understood that the following examples are only illustrative and explanatory of the present invention and should not be construed as limiting the scope of the present invention. All the technologies realized based on the above-mentioned contents of the present invention are covered in the protection scope of the present invention.
Unless otherwise indicated, the raw materials and reagents used in the following examples are all commercially available products or can be prepared by known methods.
Example 1
1. The source of the dairy cow is as follows: selecting cow with 45 births, milk yield and similar lactation day age in Tianjin Mengde pasture. Cow variety: holstein cows.
2. Grouping: the cows were randomly divided into 3 groups, 15 in each group, a control group, a whole flaxseed group and a crushed flaxseed group according to a random block test. The intact group refers to the unprocessed flaxseeds, which have a particle size of about 4.90X 2.50X 1.00 mm. The pulverizing group is prepared by processing semen Lini into particle size of 0.1-1 mm.
3. Feeding mode: preparing basic ration, setting as a control group, adding linseed on the basis, wherein the mass ratio of energy components to coarse materials of the basic ration is about 65: 35. the daily ration composition in table 1 was used, 6 per day: 30. 14: 00 and 21: the feeding is carried out by 30 words, the pre-feeding period is 7 days, the test period is 35 days, and the total time is 42 days. The nutritional levels of the basal diet ingredient meter used are shown in table 1.
The control group is prepared by adding no linseed, and the rest components are the same as the basic ration, and the specific components and contents are shown in tables 1-5.
TABLE 1 daily ration composition
Figure BDA0002910308580000071
TABLE 2 energy component composition
Figure BDA0002910308580000072
TABLE 3 protein component composition
Figure BDA0002910308580000073
Figure BDA0002910308580000081
TABLE 4 coarse material composition
Figure BDA0002910308580000082
TABLE 5 additive and premix compositions
Figure BDA0002910308580000083
In each kilogram of dry matter, the premix comprises 313500IU of vitamin A, 104500IU of vitamin D, 5000IU of vitamin E, 780mg of copper, 780mg of iron, 780mg of manganese, 3900mg of zinc, 30mg of selenium, 50mg of iodine and 65mg of cobalt.
4. And (4) observing the content: testing milk yield, milk quality, dry matter intake and omega-3 polyunsaturated fatty acids in milk
5. Test results and analysis
(1) The influence of the linseed added to the animal daily ration on the production performance of the dairy cow is found in experiments, and the milk protein content, the milk fat content and the milk yield of the animal daily ration are not influenced, as shown in table 6.
TABLE 6
Figure BDA0002910308580000091
The P value indicates the significance of the difference among the control group, the complete group and the crushing group, the difference is not significant when P is more than or equal to 0.05, and the difference is significant when P is less than 0.05.
4% cream corrected milk-0.4 × milk yield (kg) +15 × cream yield (kg); energy corrected milk yield ═ 0.327 x milk yield (kg/d)) + (12.95 x milk fat yield (kg/d)) + (7.2 x milk protein yield (kg/d)).
(2) The effect of adding linseed to the daily ration on the production performance of the dairy cows is found through experiments, and the effect of adding linseed to the daily ration can improve the content of omega-3 polyunsaturated fatty acid (alpha-linolenic acid (ALA), eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA)) in milk, as shown in Table 7.
TABLE 7 fatty acid composition in milk
Figure BDA0002910308580000092
Figure BDA0002910308580000101
Figure BDA0002910308580000111
Note: the P value indicates the significance of the difference among the control group, the complete group and the crushing group, the difference is not significant when P is more than or equal to 0.05, and the difference is significant when P is less than 0.05.
In the same fatty acid, the superscript a, b or c indicates groups with differences, and in the notation, the same letter (i.e., a and a, or b and b, or c and c, or a and ab, or b and ab) indicates that the difference between the two groups is not significant; the letters labeled differently (i.e., a and bc, or a and b, or a and c, or b and ac, or b and c, or ab and c) indicate that the two groups differ significantly.
Taking caproic acid as an example, the P value is 0.005, and the difference among the control group, the complete group and the crushed group is obvious; the upper label of the control group is b, the upper labels of the complete group and the crushed group are a, which shows that the difference between the caproic acid content of the control group and the crushed group is obvious, the difference between the caproic acid content of the control group and the complete group is obvious, and the difference between the complete group and the crushed group is not obvious.
The embodiments of the present invention have been described above. However, the present invention is not limited to the above embodiment. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A feed for increasing omega-3 polyunsaturated fatty acids in animal milk, characterized in that the feed raw material comprises flaxseed in a proportion of 5-9% (DM%), preferably 5.9-7.2% (DM%), more preferably 6.1-6.8% (DM%) based on the total weight of dry matter of the feed.
2. The feed according to claim 1, characterized in that the feed raw material further comprises an energy component, said energy component constituting 27-30% (DM%), preferably 28.5-29.5% (DM%), of the total weight of feed dry matter;
preferably, the feed further comprises a protein component, said protein component comprising 18-21% (DM%), preferably 19.5-20.7% (DM%), of the total weight of dry matter of the feed;
preferably, the feed raw material further comprises coarse material, wherein the coarse material accounts for 36-38% (DM%), preferably 36.4-37.4% (DM%) of the total weight of dry matter of the feed;
preferably, the feed raw materials also comprise additives and premix compounds, wherein the additives and premix compounds account for 6-9% (DM%), preferably 7-8% (DM%) of the total weight of dry matters of the feed, and the mass ratio of the premix compounds to the additives is 2-4:1, preferably 2.8: 1.
3. The feed according to claim 1 or 2, characterized in that the energy component comprises 20-22% (DM%) of ground corn, 2-4% (DM%) of flaked corn, 1-3% (DM%) of cottonseed, 1-2% (DM%) of fat powder and 0.5-2% (DM%) of bran, calculated as 100% of the total dry matter of the feed; preferably, the energy component comprises 21-21.2% (DM) of ground corn, 2.3-3.4% (DM) of flaked corn, 1.4-2.5% (DM) of wool seed, 1.4-1.7% (DM%) of fat powder and 1-1.2% (DM) of bran.
4. The feed according to any one of claims 1 to 3, wherein the protein component comprises 43% of soybean meal 11-13% (DM%), puffed soybean 2-2.8% (DM%), cottonseed meal 2.8-3.8% (DM%) and distillers grains DDGS 2.2-3.5% (DM%), based on 100% total dry matter of the feed. Preferably, the protein component comprises 43 bean pulp 11.3-12.3% (DM%), puffed soybean 2-2.5% (DM%), cottonseed 3-3.3% (DM%), and distillers grains DDGS 2.7-3.1% (DM%).
5. The feedstuff according to any one of claims 1 to 4, characterized in that the coarse material comprises corn silage 20-23% (DM%), alfalfa hay 7-9% (DM%), semi-dry alfalfa silage 3-4% (DM%), and wrapped straw silage 1-3% (DM%), based on 100% total dry matter of the feedstuff. Preferably, the coarse material comprises corn silage 20.86-22.86% (DM%), alfalfa hay 8.9% (DM%), semi-dry alfalfa silage 3.7% (DM%), wrapped straw silage 2.5% (DM%).
6. The feed according to any one of claims 1 to 5, wherein the dry matter of the feed comprises 6-7% flaxseed, 28-30% of energy component, 19-21% of protein component, 36-38% of coarse material, 7-8.8% of additives and premix, based on 100% of the total dry matter of the feed. Preferably, the dry matter of the feed comprises flaxseed 6.1-6.8%, energy component 28.5-29.5%, protein component 19.6-20.7%, coarse material 36.4-37.4%, additives and premix 7-8%.
7. The feed as claimed in any one of claims 1 to 6, wherein the feed comprises linoleic acid (C18:2cis-9,12) in an amount of 20 to 30% and alpha-linolenic acid (C18:3cis-9,12,15(ALA)) in an amount of 20 to 30% by weight based on the total fatty acids contained in the feed.
8. A process for preparing the feed of any one of claims 1 to 7, characterized by the specific steps of: uniformly mixing flaxseeds, energy components, protein components, coarse materials, additives and premix to prepare a feed;
preferably, the flaxseed is raw or processed to a material with a particle size of 0.1-1 mm.
9. Use of the feed according to any one of claims 1 to 7 for feeding milk producing animals, including cattle, sheep and other milk producing animals.
10. Use according to claim 9, wherein the milk produced by the product animal contains an increased amount of omega-3 polyunsaturated fatty acids after feeding the feed according to any one of claims 1-7; wherein the content of omega-3 polyunsaturated fatty acids is 0.5-1.5%, for example 0.5-0.8% or 0.9-1.3% by weight based on the total fatty acids in the milk.
CN202110084538.5A 2021-01-21 2021-01-21 Feed for improving content of polyunsaturated fatty acid in animal milk and preparation method thereof Pending CN114794318A (en)

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