Astragalus mongholicus leftover material fermented feed as well as preparation method and application thereof

Abstract

The invention provides an astragalus leftover material fermented feed as well as a preparation method and application thereof, and belongs to the technical field of traditional Chinese medicine feeds. The astragalus leftover material fermented feed is prepared from the following raw materials in parts by weight: 45 to 65 parts of astragalus leftover materials, 2 to 10 parts of soybean meal, 6 to 10 parts of vinasse, 10 to 16 parts of bran, 0.2 to 0.6 part of microbial bacterial liquid and 6 to 15 parts of water. According to the invention, the low-value byproduct astragalus leftover material is fully utilized, the crude protein content and feeding effect of the astragalus leftover material fermented feed are improved through a biological fermentation technology, Chinese herbal medicines are used as primers, the use of protein raw materials is reduced, and the designed formula is healthy and balanced in nutrition. After the astragalus leftover material fermented feed is adopted to replace part of basic ration, the feed is suitable for being used in the beef cattle fattening period, the production performance of the beef cattle is not affected, and the economic benefits of farmers are effectively improved.

Description

Technical Field

[0001] The invention belongs to the technical field of traditional Chinese medicine feed, and in particular relates to an astragalus scrap fermented feed and a preparation method and application thereof. Background Art

[0002] With the continuous development of modern animal husbandry and the deepening of people's health awareness, the requirements for animal feed quality are increasing. Traditional feed usually has many limitations in nutritional value, safety and environmental sustainability, which affects the healthy development of animal husbandry. In this context, it is of great practical significance to develop a new method that can fully utilize natural resources and improve feed quality.

[0003] Astragalus is a traditional Chinese herbal medicine with rich bioactive ingredients and has been used in health care. The scraps generated during the production of astragalus vinegar and medicines are usually treated as waste, resulting in a waste of resources. However, existing studies have shown that the active ingredients in astragalus, such as flavonoids, play a beneficial role in animal growth. If these scraps can be converted into high-value-added products, the effective utilization rate of astragalus can be greatly improved.

[0004] In recent years, bio-fermentation technology has been widely used in the field of feed processing. Fermented feed can not only improve nutritional value, but also promote animal health and environmental protection. Despite this, the fermentation technology for Astragalus scraps is still relatively rare in the market, and the existing research and process of using bio-fermentation technology to develop feed from Astragalus scraps is immature.

[0005] Therefore, it is urgently necessary to develop a new type of fermented feed production technology and process of Astragalus scraps through scientific and reasonable technology research and development and process innovation, which will not only solve the problem of waste of Astragalus scrap resources, but also improve the quality of feed and promote the green development of animal husbandry. Summary of the invention

[0006] In view of this, the purpose of the present invention is to provide a fermented feed of astragalus scraps and a preparation method and application thereof. The present invention provides a specific operation scheme for the development and utilization of astragalus scraps, promotes the development of grain-saving animal husbandry, and avoids the situation where people and animals compete for grain.

[0007] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions:

[0008] The invention provides an astragalus scrap fermented feed, comprising the following raw materials in parts by weight: 45-65 parts of astragalus scrap, 2-10 parts of soybean meal, 6-10 parts of distiller's grains, 10-16 parts of bran, 0.2-0.6 parts of microbial liquid and 6-15 parts of water.

[0009] Preferably, the raw materials are included in parts by weight: 55-60 parts of astragalus scraps, 5-8 parts of soybean meal, 7-9 parts of distiller's grains, 12-15 parts of bran, 0.3-0.5 parts of microbial liquid, and 10-13 parts of water.

[0010] Preferably, the raw materials are included in the following parts by weight: 58 parts of astragalus scraps, 7.6 parts of soybean meal, 8.6 parts of distiller's grains, 14 parts of bran, 0.4 parts of microbial liquid, and 11.4 parts of water.

[0011] Preferably, the microbial liquid is composed of the following weight ratio: water: brown sugar: microbial composite preparation is 24-28: 0.4-0.6: 0.05-0.2.

[0012] Preferably, the microbial composite preparation is composed of the following components in a mass ratio: Bacillus subtilis: yeast: photosynthetic bacteria: acetic acid bacteria: lactic acid bacteria: actinomycetes: Trichoderma: cellulase is 10-15: 5-15: 1-3: 3-6: 10-15: 3-6: 2-5: 8-12.

[0013] The effective viable bacteria count in the microbial composite preparation is ≥5.0×10 5 CFU / mL.

[0014] The present invention provides a method for preparing fermented feed of astragalus scraps, comprising the following steps:

[0015] (1) mixing the components of the fermented astragalus scrap feed except the microbial liquid and water to obtain a mixed material;

[0016] (2) The mixed material is mixed with microbial liquid and water and then subjected to anaerobic fermentation to obtain fermented feed of astragalus scraps.

[0017] Preferably, the temperature of the anaerobic fermentation is 16-24° C., and the time of the anaerobic fermentation is 40-50 days.

[0018] The present invention also provides a total mixed diet, wherein the total mixed diet contains the fermented astragalus scraps feed or the fermented astragalus scraps feed obtained according to the preparation method of the fermented astragalus scraps feed.

[0019] The total mixed diet contains the following components in percentage by mass: 25% to 30% corn, 3% to 8% soybean meal, 8% to 15% fermented astragalus scrap feed, 4% to 8% bran, 4.5% to 5.5% 5% beef cattle compound premix feed, 0.5% to 2.0% soybean oil, and 40% to 50% silage corn.

[0020] The present invention also provides the use of the fermented astragalus scrap feed, the fermented astragalus scrap feed obtained according to the preparation method of the fermented astragalus scrap feed, or the complete mixed diet containing the fermented astragalus scrap feed in fattening beef cattle.

[0021] Compared with the prior art, the present invention has the following beneficial effects: the present invention makes full use of the low-value byproduct of Astragalus scraps, improves the crude protein content and feeding effect of Astragalus scraps fermented feed through biological fermentation technology, uses Chinese herbal medicine as an introduction, reduces the use of protein raw materials, and the designed formula is healthy and nutritionally balanced. The formula of the Astragalus scraps fermented feed of the present invention is reasonable, cost-effective, and reduces the production cost. After the Astragalus scraps fermented feed is used to replace part of the feed raw materials in the total mixed diet, the production performance of beef cattle is not affected. And it can reduce the emission of toxic and harmful gases such as ammonia in the pen, achieve green production, and improve the economic benefits of farmers. The present invention adds Astragalus scraps and adds them to the feed as an alternative to antibiotics, which solves the problems of antibiotic ban, energy saving and emission reduction, and improving breeding benefits faced by the animal husbandry industry. And the purpose of efficient utilization of Astragalus scraps is achieved, and the growth-promoting and health-care functions of Chinese herbal medicines are used to improve the immune efficacy of animals, so as to make the best use of everything. By optimizing the preparation of total mixed rations and production process for fattening cattle, the health, nutrition and production performance of beef cattle during the fattening period are ensured, while the production cost is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The leftovers of Astragalus used;

[0023] Figure 2 A microbial culture solution is prepared;

[0024] Figure 3 Fermented feed prepared from leftover astragalus;

[0025] Figure 4 The total mixed ration is obtained by adding fermented feed with astragalus scraps. DETAILED DESCRIPTION

[0026] The present invention provides a fermented feed of leftover astragalus, comprising the following raw materials in parts by weight:

[0027] 45 to 65 parts of leftover Astragalus root materials, preferably 55 to 60 parts, more preferably 58 parts.

[0028] 2 to 10 parts of soybean meal, preferably 5 to 8 parts, more preferably 7.6 parts.

[0029] The amount of sake lees is 6 to 10 parts, preferably 7 to 9 parts, and more preferably 8.6 parts.

[0030] The amount of bran is 10 to 16 parts, preferably 12 to 15 parts, and more preferably 14 parts.

[0031] The amount of the microbial liquid is 0.2 to 0.6 parts, preferably 0.3 to 0.5 parts, and more preferably 0.4 parts.

[0032] Water: 6 to 15 parts, preferably 10 to 13 parts, more preferably 11.4 parts.

[0033] In the present invention, the astragalus scraps are astragalus aboveground withered grass stems and leaves and / or astragalus Chinese herbal medicine sliced ​​fragments, and the particle size of the astragalus scraps is 20-60 meshes, preferably 30-50 meshes, and more preferably 40 meshes.

[0034] In the present invention, the microbial liquid is composed of the following weight ratio: water: brown sugar: microbial composite preparation is 24-28: 0.4-0.6: 0.05-0.2, preferably 25-27: 0.45-0.55: 0.08-0.15, and more preferably 26: 0.5: 0.1.

[0035] In the present invention, the microbial composite preparation is composed of the following mass ratio components: Bacillus subtilis: yeast: photosynthetic bacteria: acetic acid bacteria: lactic acid bacteria: actinomycetes: trichoderma: cellulase is 10-15: 5-15: 1-3: 3-6: 10-15: 3-6: 2-5: 8-12; preferably 11-14: 7-12: 1.5-2.5: 4-5.5: 11-14: 4-5.5: 2.5-4.5: 9-11; more preferably 12: 10: 2: 5: 12: 5: 3: 10; the effective viable count of the microbial composite preparation is ≥ 5.0×10 5 CFU / mL.

[0036] The present invention provides a method for preparing fermented feed of astragalus scraps, comprising the following steps:

[0037] (1) mixing the components of the fermented astragalus scrap feed except the microbial liquid and water to obtain a mixed material;

[0038] (2) The mixed material is mixed with microbial liquid and purified water and then subjected to anaerobic fermentation to obtain fermented feed of astragalus scraps.

[0039] In the present invention, the temperature of anaerobic fermentation of the fermented astragalus scrap feed is 16-24°C, preferably 18-24°C, and more preferably 22°C. The time of anaerobic fermentation is 40-50 days, preferably 42-46 days, and more preferably 45 days.

[0040] In the present invention, the sampling and determination standard of the fermented feed of Astragalus scraps is that the fermentation of the fermented feed is completed when the color of the fermented feed becomes mainly brown, the smell is sweet and slightly bitter with the taste of traditional Chinese medicine, the texture is soft, and the pH reaches 5.50±1.50.

[0041] The present invention also provides a total mixed diet, wherein the total mixed diet contains the fermented astragalus scraps feed or the fermented astragalus scraps feed obtained according to the preparation method of the fermented astragalus scraps feed.

[0042] In the present invention, the total mixed diet includes the following components in percentage by mass:

[0043] Corn 25% to 30%, preferably 26% to 29%, more preferably 27%;

[0044] Soybean meal 3% to 8%, preferably 4% to 7%, more preferably 5%;

[0045] 8% to 15% of astragalus scraps fermented feed, preferably 10% to 13%, more preferably 12%;

[0046] Bran 4% to 8%, preferably 4.5% to 7%, more preferably 5%;

[0047] 5% beef cattle compound premix feed 4.5%-5.5%, preferably 4.7%-5.2%, more preferably 5%; the main components of the 5% beef cattle compound premix feed are stone powder 50.00%, calcium hydrogen phosphate 15.00%, salt 8.00%, vitamin A acetate (500,000 IU / g) 0.50%, vitamin D3 (500,000 IU / g) 0.30%, vitamin E (50%) 0.30%, ferrous fumarate (iron ≥15%) 0.50%, copper sulfate (copper ≥25%) 0.10%, cobalt chloride (cobalt ≥5%) 0.20%, manganese sulfate (manganese ≥31%) 0.20%, zinc sulfate (zinc ≥30%) 0.30%, potassium iodide (iodine ≥5%) 0.10%, sodium selenite (selenium ≥1%) 0.05%, ethoxyquinoline 0.05%, calcium propionate 0.10%, and wheat bran 24.30%;

[0048] Soybean oil 0.5% to 2.0%, preferably 0.8% to 1.5%, more preferably 1%;

[0049] Silage corn 40% to 50%, preferably 43% to 50%, more preferably 45%.

[0050] The present invention also provides the use of the fermented astragalus scrap feed, the fermented astragalus scrap feed obtained according to the preparation method of the fermented astragalus scrap feed, or the complete mixed diet in fattening beef cattle.

[0051] The technical solutions provided by the present invention are described in detail below in conjunction with the embodiments, but they should not be construed as limiting the protection scope of the present invention.

[0052] Microbial composite preparation: Bacillus subtilis, yeast, photosynthetic bacteria, acetic acid bacteria, lactic acid bacteria, actinomycetes, trichoderma and cellulase were mixed in a mass ratio of 12:10:2:5:12:5:3:10 to obtain a microbial composite preparation, wherein Bacillus subtilis was purchased from Wuhan Huisheng Biotechnology Co., Ltd.; yeast was purchased from Orian (Hubei) Bioengineering Co., Ltd.; photosynthetic bacteria was purchased from Sichuan Runge Biotechnology Co., Ltd.; acetic acid bacteria was provided by the College of Life Sciences and Technology of Huazhong Agricultural University (Professor Peng Nan's team); lactic acid bacteria was purchased from Guangzhou Qiang Microbiology Technology Co., Ltd.; actinomycetes were purchased from Sichuan Runge Biotechnology Co., Ltd.; trichoderma was purchased from Sichuan Runge Biotechnology Co., Ltd.; cellulase was purchased from Guangdong Yidoli Biotechnology Co., Ltd.

[0053] Microbial liquid: water, brown sugar and microbial compound preparation were mixed in a weight ratio of 26:0.5:0.1 to prepare (see Figure 2 ).

[0054] Preparation of 5% beef cattle compound premix feed: 50.00% stone powder, 15.00% calcium hydrogen phosphate, 8.00% salt, 0.50% vitamin A acetate (500,000 IU / g), and 0.50% vitamin D 3 (500,000 IU / g) 0.30%, vitamin E (50%) 0.30%, ferrous fumarate (iron ≥ 15%) 0.50%, cupric sulfate (copper ≥ 25%) 0.10%, cobalt chloride (cobalt ≥ 5%) 0.20%, manganese sulfate (manganese ≥ 31%) 0.20%, zinc sulfate (zinc ≥ 30%) 0.30%, potassium iodide (iodine ≥ 5%) 0.10%, sodium selenite (selenium ≥ 1%) 0.05%, ethoxyquinoline 0.05%, calcium propionate 0.10%, wheat bran 24.30%, are accurately weighed and mixed according to the formula to prepare the product, wherein the stone powder is sieved through a 60-mesh sieve to remove impurities.

[0055] The microbial liquid and 5% beef cattle compound premix feed used in the subsequent examples and experimental examples were prepared in the above manner.

[0056] Example 1 Collection and pretreatment of leftover Astragalus

[0057] Dry grass, stems and leaves of Astragalus: Traditionally, all the above-ground stems and leaves that are cut off 7 to 10 days before harvesting Astragalus are collected and placed in a cool place to dry.

[0058] Astragalus Chinese herbal medicine slices and debris: collect the slices and debris during slicing.

[0059] The astragalus raw material is crushed into powder, the moisture content is controlled to be ≤14.0%, and the powder is passed through a 40-mesh sieve to obtain the astragalus scraps. The finished product is as follows: Figure 1 shown.

[0060] The extracts (using the water-soluble extract hot soaking method), astragaloside IV (using the HPLC method in the Pharmacopoeia of Veterinary Medicine) and calycosin glucoside (using the HPLC method in the Pharmacopoeia of Veterinary Medicine) in the collected Astragalus scraps were tested. The results showed that the extract content in the Astragalus scraps was 12.67%, the astragaloside IV content was 0.02%, and the calycosin glucoside content was 0.02%.

[0061] Example 2 Preparation of fermented feed from leftover astragalus

[0062] The raw materials were weighed according to the ratio of 58 parts of astragalus scraps, 7.6 parts of soybean meal, 8.6 parts of distiller's grains, 14 parts of bran, 0.4 parts of microbial liquid and 11.4 parts of purified water. The specific formula weighed amount and cost are shown in Table 1; the astragalus scraps obtained in Example 1 were mixed with soybean meal, distiller's grains and bran to obtain a mixture; the mixture was mixed with microbial liquid and purified water, and anaerobically fermented at 22°C for 45 days to obtain fermented astragalus scrap feed, see Table 1. Figure 3 .

[0063] Table 1 Formulation design and cost

[0064]

[0065] Experimental Example 1 Determination of nutritional components of leftover Astragalus before and after fermentation

[0066] The leftover Astragalus was subjected to anaerobic fermentation at 22°C for 45 days. The changes in nutritional components of the leftover Astragalus before and after fermentation were measured and compared. The crude protein was determined according to (GB / T 6432-1994), the crude fat was determined according to (GB / T 6433-2006), the crude ash was determined according to (GB / T 6438-2007), the neutral detergent fiber and acid detergent fiber were determined using the Van Soest detergent fiber analysis method, the calcium was determined according to (GB / T 6436-2002), and the phosphorus was determined according to (GB / T 6437-2002). The results are shown in Table 2.

[0067] Table 2 Comparison of nutritional components of Astragalus scraps before and after fermentation

[0068]

[0069] Note: "*" indicates that there is a significant difference between the fermentation and pre-fermentation (P < 0.05)

[0070] As shown in Table 2, some nutrients of Astragalus scraps changed before and after fermentation. The crude protein of Astragalus scraps increased significantly after fermentation (P<0.05), and increased by 12.67% compared with before fermentation. The calcium and phosphorus contents of Astragalus scraps did not change significantly before and after fermentation (P>0.05), but there was an increasing trend. Crude fat, crude ash, neutral detergent fiber, and acid detergent fiber all decreased significantly (P<0.05). Compared with before fermentation, neutral detergent fiber decreased by 19.26% and acid detergent fiber decreased by 12.83%.

[0071] Experimental Example 2 Feeding Test

[0072] Experimental design: 24 healthy Simmental bulls weighing close to 300.89±9.16Kg were selected as experimental animals and randomly divided into 4 groups, with 6 bulls in each group. The experimental time was 67 days, of which the pre-trial period was 7 days and the formal period was 60 days. The feed raw materials used during the experiment were provided by Gansu Aonong Feed Technology Co., Ltd. The control group was fed with a basic diet, and the experimental groups A, B, and C were fed with a complete mixed diet as follows:

[0073] Control group: corn 32%, soybean meal 9%, bran 8%, 5% beef cattle compound premix feed 5%, soybean oil 1%, silage corn 45%.

[0074] Experimental group A: corn 28%, soybean meal 6%, fermented feed of astragalus scraps 10%, bran 5%, 5% beef cattle compound premix feed 5%, soybean oil 1%, silage corn 45%.

[0075] Experimental Group B: corn 27%, soybean meal 5%, fermented feed of astragalus scraps 12%, bran 5%, 5% beef cattle compound premix feed 5%, soybean oil 1%, silage corn 45%.

[0076] Experimental Group C: corn 26%, soybean meal 4%, fermented feed of astragalus scraps 14%, bran 5%, 5% beef cattle compound premix feed 5%, soybean oil 1%, silage corn 45%.

[0077] After calculation, the cost of the above formula per kilogram of feed does not exceed 0.03 yuan.

[0078] Before the start of the experiment, the selected cattle were ear-tagged, weighed and divided into groups. The selected test area was cleaned and disinfected. The same feeding and management conditions were used in the preliminary experiment and the formal experiment, and the feeding and health of the cattle were observed. The feeding situation and feed addition amount of each group of cattle were determined, and the feed in the feed trough of each group was collected at 8:00 in the morning of the next day and weighed. Entering the formal trial period, feed was added at 8:00 and 17:00 every day, and the feeding amount and residual feed amount of each group were recorded in detail. All experimental cattle had free drinking water during the experiment.

[0079] Production performance measurement: The animals were weighed on an empty stomach before morning feeding on the 1st and 60th day after the start of the experiment, and the initial and final body weights were recorded. The average daily weight gain, average daily feed intake, and feed-to-weight ratio were calculated. The economic benefits were calculated based on the feed intake during the experiment and the local beef cattle market price.

[0080] Calculation of economic benefits of beef cattle:

[0081] Feed cost per cow during the trial period = feed consumption per cow during the trial period × number of trial days × feed cost per kilogram

[0082] Gross profit = income from weight gain per cow during the trial period - feed cost per cow during the trial period

[0083] Statistical analysis: Data were expressed as "mean ± standard deviation". The experimental data were preprocessed using Excel 2010 software, and then compared with significant differences using one-way analysis of variance (ANOVA) in SPSS22.0 software. P < 0.05 indicated a significant difference, and P > 0.05 indicated an insignificant difference.

[0084] Table 3 Effects of different replacement ratios of fermented astragalus scraps on the production performance of Simmental cattle

[0085]

[0086]

[0087] Note: Different lowercase letters in the same row indicate significant differences (P<0.05).

[0088] The average daily feed intake, average daily weight gain and feed-to-weight ratio of each group of experimental cattle during the experiment can be seen from Table 3. Compared with the control group, there was no significant difference in the average daily feed intake of each experimental group; compared with the control group, the average daily weight gain of each experimental group was higher than that of the control group, and the average daily weight gain of experimental group B was higher (P<0.05). There was no significant difference in the average daily weight gain between experimental group A and experimental group C (P>0.05), but there was an increasing trend; and compared with the control group, the feed-to-weight ratio of experimental group B was significantly reduced (P<0.05).

[0089] Table 4 Effects of different replacement ratios of fermented astragalus scraps on the economic benefits of Simmental cattle

[0090]

[0091] Note: The price of beef is calculated at 35 yuan / kg.

[0092] The economic benefit indicators of each group during the trial period are shown in Table 4. Compared with the control group, the economic benefits of each experimental group have been improved. During the trial period, the gross profit per head of the experimental group A, experimental group B and experimental group C increased by 156.00 yuan, 333.69 yuan and 192.49 yuan respectively compared with the control group. The gross profit per head of the experimental group B was the largest, that is, using 12% fermented feed to replace part of the feed in the total mixed diet in the Simmental cattle diet, the use effect was the best, and the economic benefits increased.

[0093] The present invention can improve the crude protein content and feeding effect of astragalus scrap feed by biological fermentation. The crude protein content of fermented astragalus scrap in the present invention is 12.67% higher than that of unfermented astragalus scrap. Adding an appropriate amount of fermented astragalus scrap feed to replace part of the feed raw materials in the Simmental cattle diet can improve the production performance of beef cattle. When the fermented astragalus scrap feed is added in a total mixed diet at a ratio of 12%, the average daily weight gain is significantly improved, and the feed-to-weight ratio of the Simmental cattle is reduced. The results of the present invention show that the effect is the best. Fermented astragalus scrap fermented feed can be appropriately used in the Simmental cattle diet to replace part of the raw materials, which can improve the gross profit of the Simmental cattle, and the optimal addition ratio of the fermented astragalus scrap feed is 12%.

[0094] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A fermented feed made from leftover astragalus, characterized in that: The invention comprises the following raw materials in parts by weight: 45-65 parts of astragalus scraps, 2-10 parts of soybean meal, 6-10 parts of distiller's grains, 10-16 parts of bran, 0.2-0.6 parts of microbial liquid and 6-15 parts of water.

2. The fermented feed of astragalus scraps according to claim 1, characterized in that: The invention comprises the following raw materials in parts by weight: 55-60 parts of leftover astragalus, 5-8 parts of soybean meal, 7-9 parts of distiller's grains, 12-15 parts of bran, 0.3-0.5 parts of microbial liquid and 10-13 parts of water.

3. The fermented feed of astragalus scraps according to claim 2, characterized in that: The invention comprises the following raw materials in parts by weight: 58 parts of astragalus scraps, 7.6 parts of soybean meal, 8.6 parts of distiller's grains, 14 parts of bran, 0.4 parts of microbial liquid and 11.4 parts of water.

4. The fermented feed made from leftover astragalus according to any one of claims 1 to 3, characterized in that: The microbial liquid is composed of the following weight ratios Composition: Water: brown sugar: microbial compound preparation is 24-28: 0.4-0.6: 0.05-0.

2.

5. The fermented feed of astragalus scraps according to claim 4, characterized in that: The microbial composite preparation is composed of the following components in a mass ratio: Bacillus subtilis: yeast: photosynthetic bacteria: acetic acid bacteria: lactic acid bacteria: actinomycetes: trichoderma: cellulase is 10-15: 5-15: 1-3: 3-6: 10-15: 3-6: 2-5: 8-12; The effective viable bacteria count in the microbial composite preparation is ≥5.0×10 5 CFU / mL.

6. The method for preparing fermented feed of astragalus scraps according to any one of claims 1 to 5, characterized in that: The following steps are involved: (1) Mixing the components of the fermented astragalus scrap feed according to any one of claims 1 to 3 except for the microbial liquid and water to obtain a mixed material; (2) The mixed material is mixed with microbial liquid and water and then subjected to anaerobic fermentation to obtain fermented feed of astragalus scraps.

7. The preparation method according to claim 6, characterized in that: The temperature of the anaerobic fermentation is 16-24° C., and the time of the anaerobic fermentation is 40-50 days.

8. A total mixed ration, characterized in that The total mixed diet contains the fermented astragalus scraps feed according to any one of claims 1 to 5 or the fermented astragalus scraps feed obtained by the preparation method of the fermented astragalus scraps feed according to any one of claims 6 to 7.

9. A total mixed ration according to claim 8, characterized in that The total mixed diet includes the following components in percentage by mass: 25% to 30% corn, 3% to 8% soybean meal, 8% to 15% fermented astragalus scrap feed, 4% to 8% bran, 4.5% to 5.5% 5% beef cattle compound premix feed, 0.5% to 2.0% soybean oil, and 40% to 50% silage corn.

10. Use of the fermented astragalus scrap feed according to any one of claims 1 to 5, the fermented astragalus scrap feed obtained according to the preparation method of the fermented astragalus scrap feed according to claim 6 or 7, or the total mixed diet according to any one of claims 8 to 9 in fattening beef cattle.

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