Dairy cow feed composition containing hydroponic forage grass and application of dairy cow feed composition
By compounding hydroponic wheatgrass and hydroponic barleygrass into dairy cow diets, the shortcomings of hydroponic forage in improving milk flavor and nutritional value have been addressed. This has resulted in a significant increase in the content of vitamin B12 and selenium in milk, giving it a fragrant flavor and high nutritional value.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-27
- Publication Date
- 2026-03-27
AI Technical Summary
The role of hydroponically grown pasture in improving the flavor and nutritional value of milk still needs to be improved, especially under non-grazing conditions, it is difficult to produce a similar aroma and flavor to milk from grass-fed dairy cows and increase the content of vitamin B12 and selenium.
Hydroponic wheatgrass and hydroponic barleygrass are mixed in a specific ratio (2-9:1) and added to the basal diet of dairy cows to form the first and second feed compositions. This gradually increases the intake of fresh grass by dairy cows, optimizes the diet formula to increase the content of vitamin B12 and selenium in milk, and improves the flavor.
It significantly increases the content of vitamin B12 and selenium in milk, gives milk a fresh and fragrant taste and a grassy flavor similar to that of grass-fed dairy cows, reduces feeding costs, and enhances the nutritional value of milk.
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Abstract
Description
Technical Field
[0001] This invention relates to the field of feed technology, and in particular to a dairy cow feed composition containing hydroponic pasture and its application. Background Technology
[0002] As a naturally nutritious food, milk has always been and will continue to be an important source of nutrition for people. With the advancement of consumption and the improvement of market education, consumer demand for milk is becoming increasingly diversified. In recent years, organic and grass-fed milk, emphasizing green, healthy, and fresh concepts, have flourished and have broad development prospects. As the proportion of pasture in dairy cows' diets increases, the rumen fermentation and bodily patterns of dairy cows will change. Affected by the metabolism of nutrients such as carbohydrates and amino acids in the feed, the sensory qualities of milk, such as flavor, and the content of nutrients will also change significantly. Grazing is more suitable for areas with large grasslands and suitable climates, and is not suitable for promotion in areas with scarce pasture resources or hot or cold climates. Milk from non-grazing dairy cows is less likely to produce the same fragrant flavor as milk from grass-fed cows. In recent years, with the development of hydroponics, hydroponic pasture technology has become increasingly mature. Hydroponic forage is not only tender, juicy, easy to digest, and rich in nutrients, but it also has the advantages of short cultivation time, easy harvesting, and no restrictions on season or land. It can stably provide dairy cows with safe and high-quality fresh forage. However, the role of hydroponic forage in improving milk flavor and enhancing nutrition still needs to be improved. Summary of the Invention
[0003] This invention provides a dairy cow feed composition containing hydroponic pasture and its application.
[0004] Specifically, the present invention provides the following technical solutions.
[0005] This invention provides a dairy cow feed composition comprising a first feed composition and a second feed composition; wherein both the first feed composition and the second feed composition comprise a dairy cow basal diet and hydroponic wheat seedlings and hydroponic barley seedlings in a mass ratio of (2-9):1, and the dairy cow basal diet; in the first feed composition, the mass percentage of hydroponic wheat seedlings and hydroponic barley seedlings is 4%-11%; in the second feed composition, the mass percentage of hydroponic wheat seedlings and hydroponic barley seedlings is 14%-26%.
[0006] Hydroponic wheatgrass and hydroponic barleygrass are forage grasses cultivated hydroponically under controlled temperature and humidity conditions. This invention discovers that combining hydroponic wheatgrass and hydroponic barleygrass in a ratio of (2-9):1 and gradually adding them to the basal diet of dairy cows according to the dosage gradient formed by the first and second feed compositions, increases the cows' fresh forage intake. This not only significantly increases the acetaldehyde content of milk, giving it a fragrant taste and a grassy flavor similar to grass-fed milk, but also increases the content of vitamin B12 and selenium in milk, giving it higher nutritional value. The combination of hydroponic wheatgrass and hydroponic barleygrass produces a synergistic effect, showing significantly better results in improving milk flavor and nutritional value compared to adding hydroponic wheatgrass or hydroponic barleygrass alone. Currently, there are few research reports on increasing the vitamin B12 and selenium content in milk by adjusting the diet formula of dairy cows. This invention unexpectedly discovered that the combined use of hydroponic wheatgrass and hydroponic barleygrass has a significant effect on increasing the vitamin B12 and selenium content in raw milk. Compared with exogenous addition of vitamin B12 and selenium, the increase in vitamin B12 and selenium content in raw milk is more conducive to absorption and utilization, providing an effective method for increasing the vitamin B12 and selenium content in milk products.
[0007] In this invention, the mass percentage of components such as hydroponic wheat seedlings and hydroponic barley seedlings in the feed is the same as the mass percentage of the feed's fresh weight.
[0008] Preferably, in the first feed composition, the mass ratio of hydroponic wheat seedlings to hydroponic barley seedlings is (2-4):1; and in the second feed composition, the mass ratio of hydroponic wheat seedlings to hydroponic barley seedlings is (4-9):1.
[0009] Preferably, in the first feed composition, the mass ratio of hydroponic wheat seedlings to hydroponic barley seedlings is (3-4):1; and in the second feed composition, the mass ratio of hydroponic wheat seedlings to hydroponic barley seedlings is (4-9):1.
[0010] Preferably, the hydroponic cultivation time for hydroponic wheat seedlings and hydroponic barley seedlings is 5-12 days.
[0011] Preferably, the dry matter content of hydroponic wheat seedlings and hydroponic barley seedlings is 12-18%, the moisture content is 75-90%, the effective crude protein accounts for more than 16% of the dry matter content (preferably 16%-20%), and the neutral detergent fiber accounts for more than 36% of the dry matter content (preferably 36%-45%).
[0012] Preferably, the relative feed value (RFV) of hydroponic wheat seedlings and hydroponic barley seedlings is greater than 155, and the relative feed quality (RFQ) is greater than 160.
[0013] Using the above-mentioned hydroponic wheatgrass and hydroponic barleygrass is more conducive to improving the flavor of milk and increasing the content of vitamin B12 and selenium.
[0014] The above-mentioned basic dairy cow diet includes whole-plant corn silage, alfalfa, oats, steam-flaked corn, and concentrate.
[0015] In this invention, hydroponic wheatgrass and hydroponic barleygrass can be added directly to the dairy cow's basal diet, or a portion of one or more of the following in the basal diet—whole-plant corn silage, alfalfa, oats, steam-flaked corn, and concentrate—can be replaced with hydroponic wheatgrass and hydroponic barleygrass. Preferably, hydroponic wheatgrass and hydroponic barleygrass replace a portion of the alfalfa and concentrate in the basal diet.
[0016] Based on the addition of hydroponic wheatgrass and hydroponic barleygrass, this invention adjusts and optimizes the basic diet formula for dairy cows to maintain the dry matter and nutrient levels in the diet. At the same time, it is more conducive to the synergistic effect of other diet components with hydroponic wheatgrass and hydroponic barleygrass, jointly promoting the increase of vitamin B12 and selenium content and flavor improvement in raw milk.
[0017] Preferably, the first feed composition comprises the following components in parts by weight: 35-40 parts whole-plant corn silage, 5-8 parts alfalfa, 0.8-1.2 parts high-quality oats, 18-22 parts concentrate, 16-20 parts steam-flaked corn, 3-15 parts water, 3-10 parts hydroponic wheat seedlings, and 1-2.5 parts hydroponic barley seedlings. The second feed composition comprises the following components in parts by weight: 35-40 parts whole-plant corn silage, 2-8 parts alfalfa, 0.8-1.2 parts high-quality oats, 16-22 parts concentrate, 16-20 parts steam-flaked corn, 0-5 parts water, 10-22 parts hydroponic wheat seedlings, and 1-7 parts hydroponic barley seedlings.
[0018] The present invention has found that by first feeding dairy cows with the above-mentioned first feed composition for 10-15 days, and then continuing to feed dairy cows with the above-mentioned second feed composition, the raw milk produced by the dairy cows can be sterilized to obtain pure milk products with high content of vitamin B12 and selenium, which are more nutritious, and the flavor of the milk is improved, with a fragrant taste and a flavor similar to grass-fed milk.
[0019] More preferably, the first feed composition comprises the following components in parts by weight: 37-38 parts whole-plant corn silage, 6-7 parts alfalfa, 0.9-1.1 parts oats, 19-20 parts concentrate, 18-19 parts steam-flaked corn, 5-13 parts water, 3-9 parts hydroponic wheat seedlings, and 1-2.2 parts hydroponic barley seedlings. The second feed composition comprises the following components in parts by weight: 35-38 parts whole-plant corn silage, 3-6 parts alfalfa, 0.9-1.1 parts oats, 17-20 parts concentrate, 17-19 parts steam-flaked corn, 0-4 parts water, 12-21 parts hydroponic wheat seedlings, and 2-6 parts hydroponic barley seedlings.
[0020] In this invention, the concentrate can be a commonly used concentrate for dairy cows, preferably containing the following components: soybean meal, corn flour, corn gluten meal, fat meal, calcium carbonate, distillers dried grains with solubles (DDGS), and premix.
[0021] In some embodiments of the present invention, the refined feed comprises the following components: 22-28% soybean meal, 26-30% corn flour, 7-10% corn gluten meal, 3-5% fat meal, 2-5% calcium carbonate, 10-14% DDGS, and 16-20% premix; wherein each kilogram of premix contains 3000-3500 IU of vitamin A, 35-45 mg of vitamin B1, 100-120 mg of vitamin B2, 65-75 mg of vitamin B6, 3-4 mg of vitamin B12, 3350-3450 IU of vitamin D, 150-170 IU of vitamin E, 90-100 mg of nicotinamide, 145-155 mg of folic acid, 6-7 mg of biotin, 40-50 mg of iron, 7-8 mg of copper, 25-35 mg of manganese, 35-45 mg of zinc, 0.1-0.2 mg of selenium, and 0.3-0.4 mg of iodine.
[0022] This invention also provides any one or more of the following applications of the above-described dairy cow feed composition: (1) Application in increasing the vitamin B12 content in milk; (2) Application in increasing the selenium content in milk; (3) Application in increasing the acetaldehyde content in milk; (4) Application in improving milk flavor.
[0023] In this invention, improving milk flavor means enhancing the fresh flavor of milk and / or increasing the similarity to the fresh flavor of milk produced by grass-fed cows.
[0024] The present invention provides a method for increasing the nutrient content and / or improving the flavor of milk, the method comprising: feeding dairy cows with the dairy cow feed composition described above; wherein the nutrients include vitamin B12 and / or selenium.
[0025] Preferably, the feeding method is as follows: first, feed the dairy cows with the first feed composition for 10-15 days, and then continue to feed the dairy cows with the second feed composition.
[0026] The use of hydroponic pasture in the first and second feed compositions is increased in a gradient manner, which can not only reduce stress in dairy cows, but also improve the vitamin B12 and selenium content of milk and improve the milk flavor to the light and fragrant flavor characteristics of milk produced by grass-fed dairy cows.
[0027] Preferably, the dairy cows are continuously fed the second feed composition for at least 30 days.
[0028] Preferably, the dairy cow is a dairy cow in the early lactation stage.
[0029] The beneficial effects of this invention include at least the following: the feed composition provided by this invention can significantly increase the content of vitamin B12 and selenium in milk produced by dairy cows, and can also improve the flavor of milk, enhancing its fresh taste and flavor, producing a flavor similar to that of milk produced by grass-fed dairy cows. Furthermore, using the above-mentioned feed composition can reduce feeding costs, and has significant application value in dairy cow feed development and milk quality improvement. Detailed Implementation
[0030] In the specific embodiments of the present invention, the hydroponic wheat seedlings and hydroponic barley seedlings used are harvested in 5-12 days, with a moisture content of 75-90%, a dry matter content of 12-18%, an effective crude protein content of more than 16% of the dry matter content, a neutral detergent fiber content of more than 36% of the dry matter content, a relative feed value (RFV) greater than 155, and a relative forage quality (RFQ) greater than 160.
[0031] The preparation methods for hydroponic wheat seedlings and hydroponic barley seedlings are as follows: After soaking and treating the wheat and barley seeds respectively, they are cultivated indoors in perforated seedling trays for 5-12 days. When the hydroponic wheat seedlings and hydroponic barley seedlings grow to 15-35 cm, their main components are tested. The requirements are: dry matter 12-18%, moisture 75-90%, effective crude protein accounting for more than 16% of the dry matter content, neutral detergent fiber accounting for more than 36% of the dry matter content, relative feed value (RFV) greater than 155, and relative feed quality (RFQ) greater than 160. After draining the water, they are used as feed raw materials.
[0032] In a specific embodiment of the present invention, a dairy cow feed composition is provided, the feed composition comprising a first feed composition and a second feed composition; wherein, both the first feed composition and the second feed composition comprise a dairy cow basal diet and hydroponic wheat seedlings and hydroponic barley seedlings in a mass ratio of (2-9):1; in the first feed composition, the mass percentage of hydroponic wheat seedlings and hydroponic barley seedlings is 4%-11%; in the second feed composition, the mass percentage of hydroponic wheat seedlings and hydroponic barley seedlings is 14%-26%.
[0033] Preferably, in the first feed composition, the mass ratio of hydroponic wheat seedlings to hydroponic barley seedlings is (2-4):1; and in the second feed composition, the mass ratio of hydroponic wheat seedlings to hydroponic barley seedlings is (4-9):1.
[0034] The feeding method for the above feed composition is as follows: first, feed the dairy cows with the first feed composition for 10-15 days as a transition, and then feed them with the second feed composition continuously for 30-90 days.
[0035] The dairy cows mentioned are dairy cows with a lactation period of 20-80 days.
[0036] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this invention, not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.
[0037] In the following examples, the refined feed contains the following components: 25.25% soybean meal, 28.28% corn flour, 8.59% corn gluten meal, 4.04% fat meal, 3.54% calcium carbonate, 12.12% DDGS, and 18.18% premix. Each kilogram of premix contains 3300 IU of vitamin A, 39 mg of vitamin B1, 110 mg of vitamin B2, 70 mg of vitamin B6, 3.5 mg of vitamin B12, 3410 IU of vitamin D, 160 IU of vitamin E, 95 mg of nicotinamide, 150 mg of folic acid, 6.5 mg of biotin, 45 mg of iron, 7.5 mg of copper, 30 mg of manganese, 40 mg of zinc, 0.15 mg of selenium, and 0.35 mg of iodine. The hydroponic barley and wheat seedlings used were harvested after 7 days of hydroponics. They had a moisture content of 85.70%, a dry matter content of 14.30%, an effective crude protein content of 17.60% of the dry matter content, a neutral detergent fiber content of 39.19% of the dry matter content, a relative feed value (RFV) of 159, and a relative forage quality (RFQ) of 211.
[0038] Example 1
[0039] This embodiment provides a dairy cow feed composition, which includes a first feed composition and a second feed composition, with the specific formulation (fresh weight percentage) as follows: The first feed composition consists of 37.24% (18 kg) whole-plant corn silage, 6.62% (3.2 kg) alfalfa, 1.03% (0.5 kg) oats, 19.94% (9.64 kg) concentrate, 18.62% (9 kg) steam-flaked corn, 12.42% (6 kg) water, 3.01% (1.5 kg) hydroponic wheat seedlings, and 1.03% (0.5 kg) hydroponic barley seedlings.
[0040] The second feed composition consists of: whole-plant corn silage 37.36% (18 kg), alfalfa 5.89% (2.84 kg), oats 1.04% (0.5 kg), concentrate 19.43% (9.36 kg), steam-flaked corn 18.68% (9 kg), water 3.07% (1.48 kg), hydroponic wheat seedlings 12.45% (6 kg), and hydroponic barley seedlings 2.08% (1 kg).
[0041] Example 2
[0042] This embodiment provides a dairy cow feed composition, which includes a first feed composition and a second feed composition, with the specific formulation (fresh weight percentage) as follows: The first feed composition consists of 37.32% (18 kg) whole-plant corn silage, 6.39% (3.08 kg) alfalfa, 1.04% (0.5 kg) oats, 19.88% (9.59 kg) concentrate, 18.66% (9 kg) steam-flaked corn, 8.42% (4.06 kg) water, 6.22% (3 kg) hydroponic wheat seedlings, and 2.07% (1 kg) hydroponic barley seedlings.
[0043] The second feed composition consists of 36.57% (18 kg) whole-plant corn silage, 5.28% (2.6 kg) alfalfa, 1.02% (0.5 kg) oats, 18.53% (9.12 kg) concentrate, 18.28% (9 kg) steam-flaked corn, 18.29% (9 kg) hydroponic wheat seedlings, and 2.03% (1 kg) hydroponic barley seedlings.
[0044] Example 3
[0045] This embodiment provides a dairy cow feed composition, which includes a first feed composition and a second feed composition, with the specific formulation (fresh weight percentage) as follows: The first feed composition consists of: whole-plant corn silage 37.54% (18 kg), alfalfa 6.36% (3.05 kg), oats 1.04% (0.5 kg), concentrate mix 19.87% (9.53 kg), steam-flaked corn 18.77% (9 kg), water 5.99% (2.87 kg), hydroponic wheat seedlings 8.34% (4 kg), and hydroponic barley seedlings 2.09% (1 kg).
[0046] The second feed composition consists of 35.07% (18 kg) whole-plant corn silage, 3.90% (2 kg) alfalfa, 0.97% (0.5 kg) oats, 17.19% (8.82 kg) concentrate, 17.54% (9 kg) steam-flaked corn, 20.26% (10.4 kg) hydroponic wheat seedlings, and 5.07% (2.6 kg) hydroponic barley seedlings.
[0047] Comparative Example 1
[0048] This comparative example provides a dairy cow feed composition, which is the basic daily diet for dairy cows before formula adjustment. The specific formula (fresh weight percentage) is as follows: whole plant corn silage 37.27% (18kg), alfalfa 7.04% (3.4kg), oats 1.04% (0.5kg), concentrate mix 20.50% (9.9kg), steam-flaked corn 18.63% (9kg), and water 15.52% (7.5kg).
[0049] Comparative Example 2
[0050] This comparative example provides a dairy cow feed composition, which includes a first feed composition and a second feed composition. The only difference between the first feed composition and the first feed composition of Example 3 is that 8.34% hydroponic wheat seedlings and 2.09% hydroponic barley seedlings are replaced with 10.43% hydroponic wheat seedlings. The only difference between the second feed composition and the second feed composition of Example 3 is that 20.27% hydroponic wheat seedlings and 5.07% hydroponic barley seedlings are replaced with 25.34% hydroponic wheat seedlings.
[0051] Comparative Example 3
[0052] This comparative example provides a dairy cow feed composition, which includes a first feed composition and a second feed composition. The only difference between the first feed composition and the first feed composition of Example 3 is that 8.34% hydroponic wheat seedlings and 2.09% hydroponic barley seedlings are replaced with 10.43% hydroponic barley seedlings. The only difference between the second feed composition and the second feed composition of Example 3 is that 20.27% hydroponic wheat seedlings and 5.07% hydroponic barley seedlings are replaced with 25.34% hydroponic barley seedlings.
[0053] Comparative Example 4
[0054] This comparative example provides a dairy cow feed composition with the following formula (fresh weight percentage): whole plant corn silage 35.07% (18kg), alfalfa 3.90% (2kg), oats 0.97% (0.5kg), concentrate mix 17.19% (8.82kg), steam-flaked corn 17.54% (9kg), hydroponic wheat seedlings 20.26% (10.4kg), and hydroponic barley seedlings 5.07% (2.6kg).
[0055] Comparative Example 5
[0056] This comparative example provides a dairy cow feed composition with the following formula (fresh weight percentage): whole plant corn silage 37.54% (18kg), alfalfa 6.36% (3.05kg), oats 1.04% (0.5kg), concentrate mix 19.87% (9.53kg), steam-flaked corn 18.77% (9kg), water 5.99% (2.87kg), hydroponic wheat seedlings 8.34% (4kg), and hydroponic barley seedlings 2.09% (1kg).
[0057] Comparative Example 6
[0058] This comparative example provides a dairy cow feed composition, which includes a first feed composition and a second feed composition, with the specific formulation (fresh weight percentage) as follows: The first feed composition consists of 37.54% (18 kg) whole-plant corn silage, 6.36% (3.05 kg) alfalfa, 1.04% (0.5 kg) oats, 19.87% (9.53 kg) concentrate, 18.77% (9 kg) steam-flaked corn, 5.99% (2.87 kg) water, 2.09% (1 kg) hydroponic wheat seedlings, and 8.34% (4 kg) hydroponic barley seedlings.
[0059] The second feed composition consists of: whole-plant corn silage 35.07% (18 kg), alfalfa 3.90% (2 kg), oats 0.97% (0.5 kg), concentrate 17.18% (8.82 kg), steam-flaked corn 17.54% (9 kg), hydroponic wheat seedlings 5.07% (2.6 kg), and hydroponic barley seedlings 20.27% (10.4 kg).
[0060] Experimental Example
[0061] Feeding experiments were conducted on lactating dairy cows using the feed compositions of each example and comparative example, with 120 dairy cows in each group. The feeding method for the feed compositions of Examples 1-3 and Comparative Examples 2, 3, and 6 was as follows: the cows were fed the first feed composition for 15 days, followed by the second feed composition for 60 days. The feeding method for Comparative Examples 1 and 4-5 was as follows: the cows were fed the feed compositions continuously for 75 days. The dairy cows were raised intensively in semi-enclosed barns, fed the feed compositions twice daily, milked three times a day (raw milk), and had free access to water throughout the day.
[0062] Raw milk is treated with UHT to obtain pure milk products. The milk components, vitamins and minerals in the pure milk products are tested, and sensory evaluation is carried out. Flavor compounds are analyzed by combining GC-O-MS and ROAV methods.
[0063] The sensory evaluation test selected 30 people with rich experience in dairy product evaluation to conduct quantitative descriptive sensory evaluation of the samples. The quantitative descriptive evaluation adopted a 1-7 point scale, where 1 point indicates no attribute, 2-3 points indicate a mild attribute, 4 points indicate a moderate attribute, 5-6 points indicate a strong attribute, and 7 points indicate an extremely strong attribute.
[0064] Comparative Example 4 was terminated because milk production decreased significantly three days after the start of the experiment, affecting normal production. Milk production in the other examples and comparative examples was normal, with no significant decrease.
[0065] The results of milk component analysis are shown in Table 1, and the results of milk vitamin and mineral analysis are shown in Table 2. The results showed that there was no significant difference in the milk component content of pure milk products obtained by feeding dairy cows with the feed compositions of each embodiment and comparative example. The vitamin B12 content and selenium content of pure milk products obtained by feeding dairy cows with the feed compositions of each embodiment were significantly higher than those of the feed compositions of the comparative examples, with Example 3 showing the most significant improvement.
[0066] Table 1
[0067] Table 2
[0068] The sensory evaluation scores are shown in Table 3, and the ROVA values for flavor compounds are shown in Table 4.
[0069] Table 3
[0070] Table 4
[0071] The results show that the overall odor intensity, milk flavor, fattiness, and retention of the pure milk products made by feeding dairy cows with the feed compositions of each embodiment are significantly better than those of the comparative examples. Further analysis of flavor compounds in the milk, based on sensory results, revealed that the ROVA value of acetaldehyde in the pure milk products made by feeding dairy cows with the feed compositions of each embodiment was significantly increased. ROVA, or Relative Odor Activity Value, is the ratio of the relative concentration (Ci) of an odor compound to its detection threshold (T), reflecting the contribution of the odor compound. When the ROVA value is ≥1, it indicates that the compound directly contributes to the flavor of the sample. The results indicate that the contribution of acetaldehyde to the odor of the pure milk products made by feeding dairy cows with the feed compositions of each embodiment is significantly higher than that of the comparative examples, corresponding to the fresh, grassy aroma of the pure milk products made by feeding dairy cows with the feed compositions of each embodiment.
[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims
1. A dairy cow feed composition, characterized in that, The feed composition comprises a first feed composition and a second feed composition; The first feed composition and the second feed composition both contain a dairy cow basal diet and hydroponic wheat seedlings and hydroponic barley seedlings in a mass ratio of (2-9):
1. In the first feed composition, the mass percentage of hydroponic wheat seedlings and hydroponic barley seedlings is 4%-11%; In the second feed composition, the mass percentage of hydroponic wheat seedlings and hydroponic barley seedlings is 14%-26%.
2. The dairy cow feed composition according to claim 1, characterized in that, In the first feed composition, the mass ratio of hydroponic wheat seedlings to hydroponic barley seedlings is (2-4):1; In the second feed composition, the mass ratio of hydroponic wheat seedlings to hydroponic barley seedlings is (4-9):
1.
3. The dairy cow feed composition according to claim 1, characterized in that, The hydroponic cultivation time for the hydroponic wheat seedlings and the hydroponic barley seedlings is 5-12 days.
4. The dairy cow feed composition according to claim 1, characterized in that, The hydroponic wheat seedlings and hydroponic barley seedlings have a dry matter content of 12-18%, a moisture content of 75-90%, an effective crude protein content of more than 16% of the dry matter content, and a neutral detergent fiber content of more than 36% of the dry matter content.
5. The dairy cow feed composition according to claim 1, characterized in that, The dairy cow basal diet consists of whole-plant corn silage, alfalfa, oats, steam-flaked corn, and concentrate.
6. The dairy cow feed composition according to any one of claims 1 to 5, characterized in that, The first feed composition comprises the following components in parts by weight: 35-40 parts whole-plant corn silage, 5-8 parts alfalfa, 0.8-1.2 parts high-quality oats, 18-22 parts concentrate, 16-20 parts steam-flaked corn, 3-15 parts water, 3-10 parts hydroponic wheat seedlings, and 1-2.5 parts hydroponic barley seedlings. The second feed composition comprises the following components in parts by weight: 35-40 parts whole-plant corn silage, 2-8 parts alfalfa, 0.8-1.2 parts high-quality oats, 16-22 parts concentrate, 16-20 parts steam-flaked corn, 0-5 parts water, 10-22 parts hydroponic wheat seedlings, and 1-7 parts hydroponic barley seedlings.
7. The dairy cow feed composition according to claim 6, characterized in that, The first feed composition comprises the following components in parts by weight: 37-38 parts whole-plant corn silage, 6-7 parts alfalfa, 0.9-1.1 parts oats, 19-20 parts concentrate, 18-19 parts steam-flaked corn, 5-13 parts water, 3-9 parts hydroponic wheat seedlings, and 1-2.2 parts hydroponic barley seedlings. The second feed composition comprises the following components in parts by weight: 35-38 parts whole-plant corn silage, 3-6 parts alfalfa, 0.9-1.1 parts oats, 17-20 parts concentrate, 17-19 parts steam-flaked corn, 0-4 parts water, 12-21 parts hydroponic wheat seedlings, and 2-6 parts hydroponic barley seedlings.
8. Any one or more of the following applications of the dairy cow feed composition according to any one of claims 1 to 7: (1) Application in increasing the vitamin B12 content in milk; (2) Application in increasing the selenium content in milk; (3) Application in increasing the acetaldehyde content in milk; (4) Application in improving milk flavor.
9. A method for increasing the nutrient content and / or improving the flavor of milk, characterized in that, The method includes feeding dairy cows with the dairy cow feed composition according to any one of claims 1 to 7; The nutrients mentioned include vitamin B12 and / or selenium.
10. The method according to claim 9, characterized in that, The feeding method is as follows: first feed the dairy cows with the first feed composition for 10-15 days, and then continue to feed the dairy cows with the second feed composition.