Embedded algae powder for dairy cow feed addition and dairy cow feed

Abstract

The invention belongs to the field of dairy cow feed, and particularly relates to embedded algae powder for dairy cow feed addition and dairy cow feed, the embedded algae powder for dairy cow feed addition comprises core material particles and enteric coating layers coating the core material particles, and the mass ratio of the core material particles to enteric coating materials in the enteric coating layers is 10: (2-4); the core material particles comprise algae powder, a binder and an emulsifier. The enteric coating layer is dissolved in the small intestine to release the particles, the algae powder is dispersed in the particles under the action of the emulsifier and the binder, and the mass ratio of the core material particles to the enteric coating layer is controlled to be within the range. After the embedded algae powder is added into a dairy cow feed and reaches small intestines together with other feeds, the contained algae powder is released at a proper speed, so that the DHA absorption of the small intestines is greatly improved.

Description

Technical Field

[0001] The invention belongs to the field of dairy cow feed, and particularly relates to embedded algae powder for dairy cow feed addition and dairy cow feed. Background Art

[0003] Currently, the main means of increasing DHA in cow's milk is by adding ingredients to milk. The stability and taste of milk produced by this method are affected by additives, which does not conform to the consumption trend of pure natural and additive-free. Another method is to add DHA-containing raw materials to the feed of dairy cows, convert it into natural DHA through milk metabolism, and thus increase the DHA content in milk.

[0004] The current feeding technology is as follows: increasing the DHA content by feeding embedded algae powder, for example, CN111374226A discloses a feed additive, feed containing it and application, CN105660520 discloses a feeding and management method for dairy cows, CN104206701A discloses a dairy cow feed additive and application and the obtained DHA-containing dairy products, etc. Although the above methods can increase the DHA content in milk, in actual practice, people do not absorb the DHA in these milks well, the bioavailability is low, and a large amount of DHA is excreted, resulting in waste of resources and increased costs.

[0005] Therefore, how to promote the absorption of DHA in milk is still a technical problem that needs to be solved urgently by technicians in this field. Summary of the invention

[0006] The technical problem solved by the present invention is how to overcome the defect of poor absorption effect of DHA in milk in the prior art, and further provide an embedded algae powder for adding to dairy cow feed and dairy cow feed.

[0007] The present invention also provides an embedded algae powder for adding to dairy cow feed, comprising core material particles and an enteric coating layer coated outside the core material particles, wherein the mass ratio of the core material particles to the enteric coating material in the enteric coating layer is 10:2-4; the core material particles include algae powder, a binder and an emulsifier.

[0008] The embedded algae powder for adding to dairy cow feed meets at least one of the following AD:

[0009] A. The binder is selected from at least one of starch, β-cyclodextrin, chitosan and sodium alginate; and / or, the emulsifier is at least one of α-lauric acid monoglyceride and sucrose fatty acid ester; and / or, the mass ratio of the algae powder to the binder is 1:0.0625-0.2; and / or, the mass of the emulsifier accounts for 0.1-0.3% of the total mass of the core particles;

[0010] B. The enteric coating layer comprises an enteric coating material, a plasticizer and an anti-adherent agent in a mass ratio of 1:0.01-0.5:0.02-0.5, wherein the enteric coating material is selected from at least one of polyacrylic acid resin II and polyacrylic acid resin III, the anti-adherent agent is one or more of glycerol monostearate and glycerol monolaurate, and the plasticizer is one or more of polyethylene glycol and triethyl citrate;

[0011] C. An ethyl cellulose coating layer is further included between the core material particles and the enteric coating layer, and the mass ratio of the ethyl cellulose coating layer to the core material particles is 0.05-0.1:10;

[0012] D. The mass content of the algae powder in the embedded algae powder is 30%-70%.

[0013] Furthermore, the core material particles also include antioxidants; preferably, the mass ratio of the algae powder to the antioxidant is 10:0.1-0.2; preferably, the oxidant includes at least one of vitamin C, vitamin A and magnolol.

[0014] Furthermore, the emulsifier comprises α-lauric acid monoglyceride and sucrose fatty acid ester in a mass ratio of 1.5 to 2.5:1; and / or the enteric coating material comprises polyacrylic acid resin III and polyacrylic acid resin II in a mass ratio of (0.6-1): (2-3.3).

[0015] The present invention also provides a method for preparing embedded algae powder for dairy cow feed additive, comprising the following steps:

[0016] Granulation step: adding a binder into water to prepare a binder solution, mixing the binder solution, an emulsifier and algae powder, and homogenizing, drying and granulating the mixture;

[0017] Enteric coating step: dissolving the raw materials of the enteric coating layer in an ethanol aqueous solution to obtain a coating solution, and using the coating solution to coat the particles obtained in the granulation step to obtain embedded algae powder; or, comprising the following steps:

[0018] Granulation step: adding a binder into water to prepare a binder solution, mixing the binder solution, an emulsifier and algae powder, and homogenizing, drying and granulating the mixture;

[0019] Ethyl cellulose coating step: dissolving ethyl cellulose in an ethanol aqueous solution to prepare an inner coating solution, and coating the particles obtained in the granulation step with the inner coating solution;

[0020] Enteric coating step: dissolving the raw materials of the enteric coating layer in an ethanol aqueous solution to prepare a coating solution, and using the coating solution to coat the particles coated with ethyl cellulose to obtain embedded algae powder.

[0021] Furthermore, in the granulation step, the antioxidant is first mixed with the algae powder and then mixed with the binder solution, and then the emulsifier is added to the mixture; and / or, the homogenization temperature is 40-50°C and the pressure is 160-180 bar; and / or, the drying temperature is 70-90°C; and / or, during the ethyl cellulose coating process, the flow rate of the coating liquid is controlled to be 0.05-3.5L / min, the inlet temperature is 45-55°C, the outlet temperature is 20-30°C, and the coating time is 1-2h; and / or, during the enteric coating process, the flow rate of the coating liquid is controlled to be 0.05-3.5L / min, the inlet temperature is 55-85°C, the outlet temperature is 20-30°C, and the coating time is 3-4h.

[0022] In the preparation of the coating solution of the present invention, the mass ratio of the material to the liquid is 1:5-15 (for example, 1:10). The concentration of ethanol in the ethanol aqueous solution is 75-98% (for example, 95%).

[0023] The present invention also provides a dairy cow feed, comprising any of the above-mentioned embedded algae powder for dairy cow feed additive or the embedded algae powder for dairy cow feed additive prepared by the above-mentioned preparation method, preferably, also comprising concentrated feed and / or roughage, the concentrated feed comprising: at least one of rumen bypass choline, rumen bypass glucose, rumen bypass lysine, yeast powder, vitamins, minerals, corn flour, and soybean meal; the roughage comprises at least one of silage corn, oat grass, alfalfa grass, and forage grass.

[0024] Furthermore, the cow feed comprises embedded algae powder, concentrated feed and roughage in a mass ratio of 0.2-0.5:10-30:40-60.

[0025] The present invention also provides a method for feeding dairy cows, wherein the dairy cows are fed with the dairy cow feed, and the intake of the embedded algae powder is 200-500 g / day / cow. Preferably, the dairy cows are dairy cows in a lactation period of 10-210 days.

[0026] The present invention also provides a dairy product, characterized in that the product is obtained by sterilizing the raw milk produced by the dairy cow after feeding using the method; preferably, the dairy cow is continuously fed with the above-mentioned feeding method for 15-25 days.

[0027] Furthermore, the algae powder is Schizochytrium sp. powder, which is a single feed rich in DHA produced by conventional fermentation, separation, drying and other processes using Schizochytrium sp. as raw material, preferably Schizochytrium sp. powder with a DHA content of 10-30wt%.

[0028] The technical solution of the present invention has the following beneficial effects:

[0029] 1. The embedded algae powder for adding to dairy cow feed provided by the present invention comprises core material particles and an enteric coating layer coated on the outside of the core material particles, wherein the mass ratio of the core material particles to the enteric coating material in the enteric coating layer is 10:2-4; the core material particles comprise algae powder, a binder and an emulsifier, the enteric coating layer is dissolved in the small intestine to release the particles, and the algae powder is dispersed in the particles under the action of the emulsifier and the binder, and the mass ratio of the core material particles to the enteric coating layer is controlled within the above range, so that after the embedded algae powder is added to the dairy cow feed, it reaches the small intestine together with other feeds and the algae powder contained therein is released at an appropriate speed, which greatly improves the absorption of DHA by the small intestine.

[0030] 2. The algae powder for embedding in dairy cow feed provided by the present invention increases antioxidants to improve the embedding effect and the absorption and utilization rate of DHA.

[0031] 3. The embedded algae powder for adding to dairy cow feed provided by the present invention has been found in research that when starch is used as the adhesive, magnolia ol is used as the antioxidant, the emulsifier is a mixture of sucrose fatty acid ester and α-lauric acid monoglyceride in a ratio of 1.5-2.5:1 (especially 1:2), and the enteric coating material is a mixture of polyacrylic acid resin III and polyacrylic acid resin II in a ratio of 0.6-1:2-3.3 (especially 0.8:2.3), the combination of each component can further improve the absorption of DHA by the small intestine.

[0032] 4. The embedded algae powder for cow feed additive provided by the present invention also includes an ethyl cellulose coating layer between the core material particles and the enteric coating layer, and the mass ratio of the ethyl cellulose coating layer to the core material particles is 0.05-0.1:10, which can play the role of moisture-proof and masking the bad smell of the algae powder.

[0033] 5. The preparation method of the dairy product provided by the present invention is preferably steam injection sterilization, which can reduce the heat exposure of the milk and perform degassing before and after sterilization, effectively reducing the oxygen in the liquid feed. By reducing the heat exposure and oxygen content, the oxidation of DHA in the milk is effectively reduced, thereby retaining the fresh flavor of the milk.

[0034] 6. The DHA content in the produced milk provided by the present invention can reach 10-40 mg / 100 g, preferably 20-40 mg / 100 g. DETAILED DESCRIPTION

[0035] The technical scheme of the present invention will be described clearly and completely below. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention. In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other. The DHA content in the Schizochytrium powder is 12wt%. Polyacrylic acid resin II and polyacrylic acid resin III are both pharmaceutical excipients. The concentrated feed in each embodiment and comparative example is soybean meal, and the roughage is alfalfa.

[0036] Example 1

[0037] (1) This embodiment provides an embedded algae powder for dairy cow feed additive, wherein the algae powder accounts for more than 60%, and the formula and preparation method thereof are as follows:

[0038] Core material particles: 10kg of Schizochytrium powder, 0.15kg of magnolol, 1kg of starch, 0.01kg of α-lauric acid monoglyceride, and 0.005kg of sucrose fatty acid ester.

[0039] Coating layer: inner coating: ethyl cellulose: 0.09 kg, outer coating: polyacrylic acid resin III 0.81 kg and polyacrylic acid resin II 2.54 kg, glycerol monostearate: 1.005 kg, triethyl citrate: 0.201 kg.

[0040] Preparation method:

[0041] 1) Preparation of core material particles: Mix schizochytrium powder and magnolol, dissolve starch in 10 kg of water, add the mixture of schizochytrium powder and magnolol, then add α-lauric acid monoglyceride and sucrose fatty acid ester, homogenize the mixture at 55°C and 170 bar, mix well, dry at 80°C, granulate, and sieve the whole granules (sieve 80 mesh).

[0042] 2) Preparation of inner coating solution: Ethyl cellulose and 95% ethanol were fully dissolved in 95% ethanol at a mass ratio of 1:10, and stirred at 150 pm / min to dissolve.

[0043] 3) Preparation of outer coating solution: polyacrylic acid resin III, polyacrylic acid resin II, glycerol monostearate and triethyl citrate were mixed to obtain a mixture, and the mixture was fully dissolved in 95% ethanol at a mass ratio of 1:10, and the mixture was stirred at 150 pm / min to dissolve.

[0044] 3) Coating: The core material particles are sent to the coating equipment with a coating liquid flow rate of 2L / min, an inlet air temperature of 70°C, an outlet air temperature of 40°C, and a time of 1.5h to complete the inner layer coating. The particles with the inner layer coating are then sent to the coating equipment with a coating liquid flow rate of 2L / min, an inlet air temperature of 70°C, an outlet air temperature of 40°C, and a time of 4h.

[0045] (2) This embodiment also provides a dairy cow feed, the formula and preparation method of which are as follows:

[0046] Formula: 2kg of embedded algae powder, 200kg of concentrated feed, and 300kg of roughage in this embodiment; Preparation method: Weigh each raw material according to the formula and mix them evenly.

[0047] (3) This embodiment also provides a method for feeding dairy cows, using the dairy cow feed of this embodiment to continuously feed dairy cows in a lactation period of 150 days for 20 days, and the intake of the embedded algae powder is about 239 g / day / head.

[0048] (4) This embodiment also provides a dairy product, which is produced by using the milk produced by the feeding method of this embodiment as a raw material, purifying the milk, removing impurities, microfiltration and sterilization, RO membrane concentration, steam injection sterilization, and aseptic filling;

[0049] Ceramic membrane was used for microfiltration sterilization, the temperature was 45℃, and the membrane pore size was 1.4μm; the protein content reached 3.8±0.02g / 100g and the DHA content reached 35.8±0.04mg / 100g through RO membrane concentration. Steam injection sterilization was used, the temperature was 154℃ / 0.25s, the preheating temperature was 78℃, the degassing vacuum degree before sterilization was -0.7bar, and the degassing vacuum degree after sterilization was -0.85bar.

[0050] Example 2

[0051] The present embodiment provides an embedded algae powder for use as a feed additive for dairy cows, dairy cow feed, a method for raising dairy cows and a dairy product. The raw materials and process conditions are basically the same as those in Example 1, with the only difference being that "0.015 kg of α-lauric acid monoglyceride" is used in the formula of the embedded algae powder instead of "0.01 kg of α-lauric acid monoglyceride and 0.005 kg of sucrose fatty acid ester" in Example 1.

[0052] Example 3

[0053] The present embodiment provides an embedded algae powder for adding to dairy cow feed, dairy cow feed, a method for raising dairy cows and a dairy product. The raw materials and process conditions are basically the same as those in Example 1, with the only difference being that "1 kg of β-cyclodextrin" is used in the formula of the embedded algae powder instead of "1 kg of starch" in Example 1.

[0054] Example 4

[0055] The present embodiment provides an embedded algae powder for adding to dairy cow feed, dairy cow feed, a method for raising dairy cows and a dairy product. The raw materials and process conditions are basically the same as those in Example 1, with the only difference being that "3.35 kg of polyacrylic acid resin III" is used in the formula of the embedded algae powder instead of "0.81 kg of polyacrylic acid resin III and 2.54 kg of polyacrylic acid resin II" in Example 1.

[0056] Example 5

[0057] The present embodiment provides an embedded algae powder for use as a feed additive for dairy cows, dairy cow feed, a method for raising dairy cows and a dairy product. The raw materials and process conditions are substantially the same as those of Example 1, with the only difference being that the formula of the embedded algae powder uses "0.02 kg of α-lauric acid monoglyceride and 0.01 kg of sucrose fatty acid ester" instead of "0.01 kg of α-lauric acid monoglyceride and 0.005 kg of sucrose fatty acid ester" in Example 1.

[0058] Comparative Example 1

[0059] The present embodiment provides an embedded algae powder for adding to dairy cow feed, dairy cow feed, a method for raising dairy cows and a dairy product. The raw materials and process conditions are basically the same as those in Example 1, with the only difference being that the embedded algae powder is used in the formula instead of "0.25 kg of polyacrylic acid resin III and 0.77 kg of polyacrylic acid resin II" instead of "0.81 kg of polyacrylic acid resin III and 2.54 kg of polyacrylic acid resin II" in Example 1.

[0060] Comparative Example 2

[0061] The present embodiment provides an embedded algae powder for adding to dairy cow feed, dairy cow feed, a method for raising dairy cows and a dairy product. The raw materials and process conditions are basically the same as those in Example 1, with the only difference being that the embedded algae powder is used in the formula instead of "1.35 kg of polyacrylic acid resin III and 1.23 kg of polyacrylic acid resin II" instead of "0.81 kg of polyacrylic acid resin III and 2.54 kg of polyacrylic acid resin II" in Example 1.

[0062] Comparative Example 3

[0063] This comparative example provides a dairy cow feed, a dairy product made from milk produced by dairy cows fed with the feed, and a preparation method thereof, which are basically the same as those in Example 1, except that no embedded algae powder is added to the dairy cow feed.

[0064] Comparative Example 4

[0065] This comparative example provides a dairy cow feed, a dairy product made from milk produced by a dairy cow fed with the feed, and a preparation method thereof, which are basically the same as those in Example 1, except that the algae powder added to the dairy cow feed is not processed by an embedding process, that is, the algae powder is not embedded, and at the same time, the mass of the added algae powder is adjusted to 4 kg.

[0066] Experimental Example 1

[0067] The content of DHA in the milk products obtained in each embodiment and comparative example was tested with reference to standard GB 5413.27. The results are shown in the following table.

[0068] Table 1 DHA content in dairy products

[0069]

[0070]

[0071] Conclusion: Comparative Example 3 is significantly lower than the other groups, indicating that DHA mainly comes from the conversion of DHA algae oil in the feed in the cow's body. If the feed does not contain algae powder, the DHA content in the milk is extremely low (not detected). Compared with Comparative Examples 1-4, the DHA content in the dairy products of Examples 1-5 of the present invention is significantly increased, and Examples 1 and 5 have the best effect.

[0072] Experimental Example 2

[0073] 6-8 week old female rats, weighing 350-400g, were randomly divided into three groups, 10 in each group. Test group 1 was given 45mL / kg of the dairy product of Example 1 by one-time gavage, and control groups 1 and 2 were given exogenous DHA added milk (DHA content 59.1±0.02mg / 100g) and DHA dietary compensator (DHA content 944±0.07mg / 100g) by one-time gavage, respectively. The dose of control group 1 was 45mL / kg, and the dose of control group 2 was 50g / kg. Wherein exogenous DHA added milk is milk produced by cows fed with ordinary feed, and DHA stock solution is added to the milk for processing, and the processing technology adopted is the same as the processing technology of the dairy product of Example 1. Wherein DHA stock solution is provided by Xiamen Huisheng Biological Co., Ltd. DHA dietary compensator is to add DHA stock solution to rat diet, wherein DHA stock solution is provided by Xiamen Huisheng Biological Co., Ltd., and feed is provided by Beijing Keao Xieli Feed Co., Ltd. Based on DNA content, the feeding ratio of experimental group 1, control group 1 and control group 2 was 1:1.67:29.63.

[0074] Feces were collected using a metabolic cage 1-2 days before gavage, blood was collected before gavage, and the blood was collected by centrifugation. The DHA content in feces and blood was determined as baseline data. Feces were collected for 24 hours in batches; the test animals were given the last gavage, and feces were collected using a metabolic cage. Blood samples were collected at different time points of gavage at 0h, 1h, 2h, 4h, 8h, 12h, 16h, and 24h, and serum was collected by centrifugation. The DHA content in feces and blood was detected by LC-MS biological sample analysis method. Pharmacokinetic parameters were calculated based on the DHA content in the blood, mainly including the maximum DHA concentration (Cmax) and the DHA concentration within 24 hours (AUC). The average excretion rate of DHA was calculated based on the DHA content in the feces, and the average excretion rate of DHA = DHA content / DHA feeding amount. The results are shown in Table 2.

[0075] Table 2

[0076]

[0077] Conclusion: Compared with control groups 1 and 2, the blood drug concentration and AUC of the experimental group 1 of the present invention were significantly improved, and the average excretion rate was significantly decreased, indicating that the absorption effect of DHA in the milk of the experimental group 1 was significantly better than that of the control group, indicating that the DHA in the milk produced by feeding Schizochytrium powder is more easily absorbed than exogenously added DHA or DHA supplements.

[0078] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. For example, the shape of the concave portion can be selected in a variety of ways, and can also be customized according to the wishes of the consumer. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from this are still within the scope of protection of the present invention.

Claims

1. An embedded algae powder for adding to dairy cow feed, characterized in that: It comprises core material particles and an enteric coating layer coated outside the core material particles, wherein the mass ratio of the core material particles to the enteric coating material in the enteric coating layer is 10:2-4; the core material particles comprise algae powder, a binder and an emulsifier.

2. The embedded algae powder for adding to dairy cow feed according to claim 1, characterized in that: The embedded algae powder for adding to dairy cow feed meets at least one of the following AD: A. The binder is selected from at least one of starch, β-cyclodextrin, chitosan and sodium alginate; and / or, the emulsifier is at least one of α-lauric acid monoglyceride and sucrose fatty acid ester; and / or, the mass ratio of the algae powder to the binder is 1:0.0625-0.2; and / or, the mass of the emulsifier accounts for 0.1-0.3% of the total mass of the core particles; B. The enteric coating layer comprises an enteric coating material, a plasticizer and an anti-adherent agent in a mass ratio of 1:0.01-0.5:0.02-0.5, wherein the enteric coating material is selected from at least one of polyacrylic acid resin II and polyacrylic acid resin III, the anti-adherent agent is one or more of glycerol monostearate and glycerol monolaurate, and the plasticizer is one or more of polyethylene glycol and triethyl citrate; C. An ethyl cellulose coating layer is further included between the core material particles and the enteric coating layer, and the mass ratio of the ethyl cellulose coating layer to the core material particles is 0.05-0.1:10; D. The mass content of the algae powder in the embedded algae powder is 30%-70%.

3. The embedded algae powder for adding to dairy cow feed according to claim 1 or 2, characterized in that: The core material particles also include antioxidants; preferably, the mass ratio of the algae powder to the antioxidant is 10:0.1-0.2; preferably, the oxidant includes at least one of vitamin C, vitamin A and magnolol.

4. The embedded algae powder for adding to dairy cow feed according to claim 1 or 2, characterized in that: The emulsifier comprises α-lauric acid monoglyceride and sucrose fatty acid ester in a mass ratio of 1.5-2.5:1; and / or the enteric coating material comprises polyacrylic acid resin III and polyacrylic acid resin II in a mass ratio of 0.6-1:2-3.

3.

5. A method for preparing embedded algae powder for dairy cow feed additive, characterized in that: The steps include: Granulation step: adding a binder into water to prepare a binder solution, mixing the binder solution, an emulsifier and algae powder, and homogenizing, drying and granulating the mixture; Enteric coating step: dissolving the raw materials of the enteric coating layer in an ethanol aqueous solution to obtain a coating solution, and using the coating solution to coat the particles obtained in the granulation step to obtain embedded algae powder; or, comprising the following steps: Granulation step: adding a binder into water to prepare a binder solution, mixing the binder solution, an emulsifier and algae powder, and homogenizing, drying and granulating the mixture; Ethyl cellulose coating step: dissolving ethyl cellulose in an ethanol aqueous solution to prepare an inner coating solution, and coating the particles obtained in the granulation step with the inner coating solution; Enteric coating step: dissolving the raw materials of the enteric coating layer in an ethanol aqueous solution to prepare a coating solution, and using the coating solution to coat the particles coated with ethyl cellulose to obtain embedded algae powder.

6. The method for preparing the embedded algae powder for dairy cow feed additive according to claim 5, characterized in that: In the granulation step, the antioxidant is first mixed with the algae powder, and then mixed with the binder solution, and then the emulsifier is added to the mixture; and / or, the homogenization temperature is 40-50°C and the pressure is 160-180bar; and / or, the drying temperature is 70-90°C; and / or, during the ethyl cellulose coating process, the flow rate of the coating liquid is controlled to be 0.05-3.5L / min, the inlet air temperature is 45-55°C, the outlet air temperature is 20-30°C, and the coating time is 1-2h; and / or, during the enteric coating process, the flow rate of the coating liquid is controlled to be 0.05-3.5L / min, the inlet air temperature is 55-85°C, the outlet air temperature is 20-30°C, and the coating time is 3-4h.

7. A dairy cow feed, characterized in that: The invention comprises the embedded algae powder for dairy cow feed additive according to any one of claims 1 to 4 or the embedded algae powder for dairy cow feed additive prepared by the preparation method according to claim 5 or 6, and preferably further comprises concentrated feed and / or roughage, wherein the concentrated feed comprises: at least one of rumen bypass choline, rumen bypass glucose, rumen bypass lysine, yeast powder, vitamins, minerals, corn flour and soybean meal; and the roughage comprises at least one of silage corn, oat grass, alfalfa grass and forage grass.

8. The dairy cow feed according to claim 7, characterized in that: The dairy cow feed comprises embedded algae powder, concentrated feed and roughage in a mass ratio of 0.2-0.5:10-30:40-60.

9. A method for raising dairy cows, characterized in that: The dairy cows are fed with the dairy cow feed according to claim 7 or 8, and the intake of the embedded algae powder is 200-500 g / day / cow. Preferably, the dairy cows are in a lactation period of 10-210 days.

10. A dairy product, characterized in that The raw milk produced by the dairy cow after feeding according to the method of claim 9 is sterilized and prepared; preferably, the dairy cow is continuously fed by the feeding method of claim 9 for 15-25 days.

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