Anti-heat-stress feed based on compounding of selenium yeast and allicin and preparation method of anti-heat-stress feed

Abstract

The invention relates to the technical field of livestock breeding, in particular to a heat-stress-resistant feed based on compounding of yeast selenium and allicin and a preparation method of the heat-stress-resistant feed based on compounding of the yeast selenium and the allicin. Comprising the following components in parts by weight: 1-5 parts of selenium yeast, 2-8 parts of allicin, 10-30 parts of dandelion, 5-15 parts of rhizoma atractylodis, 20-40 parts of wheat bran, 5-10 parts of glucose, 10-20 parts of dextrin, 1-3 parts of a compound vitamin premix and 1-3 parts of a compound mineral premix. The preparation method comprises the following steps: mixing selenium yeast with wheat bran and glucose, inoculating compound probiotics for solid-state fermentation to obtain a fermentation product, and drying the fermentation product to obtain activated selenium yeast; and mixing allicin with the activated selenium yeast, and adding dextrin and a protective agent for microencapsulation embedding. According to the invention, the yeast selenium with high bioavailability and the natural antibacterial allicin are compounded through a microencapsulation technology to synergistically enhance the oxidation resistance, immunity and anti-inflammatory ability of the broiler chicken, so that the heat stress is efficiently relieved.

Description

Technical Field

[0001] This invention relates to the field of animal husbandry technology, specifically to an anti-heat stress feed based on a combination of yeast selenium and allicin, and its preparation method. Background Technology

[0002] Unlike fast-growing, large-scale white-feathered broilers with short rearing cycles, local premium broilers (such as Taihe Silkie, Chongren Ma Chicken, and Xiushui Silkie) have unique physiological and genetic characteristics, including long growth cycles, high metabolic heat production, thick plumage, and skin pigmentation. These characteristics make them more sensitive to heat stress and more susceptible to environmental temperature effects in intensive farming environments. When the ambient temperature exceeds 28°C, local premium broilers exhibit typical heat stress responses: On the one hand, heat stress leads to decreased feed intake and reduced digestive enzyme activity, resulting in slower growth and increased feed conversion ratio, directly impacting economic efficiency. On the other hand, heat stress promotes the production of large amounts of reactive oxygen species, disrupting the oxidation-antioxidant balance and leading to the accumulation of oxidative damage products such as malondialdehyde (MDA) and decreased activity of antioxidant enzymes such as superoxide dismutase (SOD) and glutathione peroxidase (GSH-Px). Simultaneously, heat stress also suppresses immune system function, causing reduced immunoglobulin synthesis and disordered cytokine secretion, thus reducing disease resistance and increasing mortality in broilers. Therefore, developing efficient heat stress-resistant feed has become the key to solving the problems of broiler farming in summer or high-temperature environments.

[0003] Agricultural Science News Network suggests adding appropriate amounts of vitamin E and vitamin C to feed to mitigate the effects of heat stress. For broilers prone to seizures and panic attacks, adding 0.1% fumaric acid to their feed can significantly alleviate heat stress, improve appetite, and increase feed conversion rate. However, these products primarily work by supplementing vitamins, regulating electrolyte balance, or providing exogenous antioxidants, contributing to maintaining homeostasis to some extent. However, existing products generally suffer from drawbacks such as limited functionality, insufficient synergistic effects, poor stability, or high cost. For example, a single antioxidant component is insufficient to comprehensively address the complex oxidative damage caused by heat stress; chemically synthesized antioxidants may have low bioavailability and residue risks; and most traditional Chinese medicine extracts suffer from unsatisfactory effects due to their bitter taste affecting palatability and unstable active ingredient content. Therefore, the livestock industry urgently needs a new type of compound feed additive with natural ingredients, synergistic effects, good stability, and the ability to comprehensively improve the heat stress resistance of broilers. Summary of the Invention

[0004] To address the aforementioned issues, this invention provides an anti-heat stress feed based on a combination of yeast selenium and allicin, along with its preparation method. By combining highly bioavailable yeast selenium with naturally antibacterial allicin using microencapsulation technology, the feed synergistically enhances the antioxidant, immune, and anti-inflammatory capabilities of broilers, thereby effectively alleviating heat stress.

[0005] To achieve the above objectives, the technical solution of the present invention is as follows: a heat stress-resistant feed based on a combination of yeast selenium and allicin, comprising the following components by weight: 1-5 parts yeast selenium, 2-8 parts allicin, 10-30 parts dandelion, 5-15 parts Atractylodes lancea, 20-40 parts wheat bran, 5-10 parts glucose, 10-20 parts dextrin, 1-3 parts compound vitamin premix, and 1-3 parts compound mineral premix.

[0006] Furthermore, it comprises the following components by weight: 1 part yeast selenium, 2 parts allicin, 10 parts dandelion, 5 parts Atractylodes lancea, 20 parts wheat bran, 5 parts glucose, 10 parts dextrin, 1 part compound vitamin premix, and 1 part compound mineral premix.

[0007] Furthermore, it includes the following components by weight: 3 parts yeast selenium, 5 parts allicin, 20 parts dandelion, 10 parts Atractylodes lancea, 30 parts wheat bran, 7 parts glucose, 15 parts dextrin, 2 parts compound vitamin premix, and 2 parts compound mineral premix.

[0008] Furthermore, it includes the following components by weight: 5 parts yeast selenium, 8 parts allicin, 30 parts dandelion, 15 parts Atractylodes lancea, 40 parts wheat bran, 10 parts glucose, 20 parts dextrin, 3 parts compound vitamin premix, and 3 parts compound mineral premix.

[0009] A method for preparing an anti-heat stress feed based on a yeast selenium and allicin complex, based on the weight parts of any one of the described anti-heat stress feeds based on a yeast selenium and allicin complex, includes the following steps: S1, Yeast Selenium Treatment: Yeast selenium is mixed with wheat bran and glucose, inoculated with compound probiotics for solid-state fermentation, and the fermentation product is dried to obtain activated yeast selenium. S2, Allicin treatment: Allicin and activated yeast selenium are mixed in a mass ratio of 1:5-1:10, dextrin and protectant are added for microencapsulation to obtain yeast selenium-allicin complex. S3, Preparation of extract: The dried whole dandelion herb and the rhizome of Atractylodes lancea were mixed and pulverized in a mass ratio of 2:1-4:1, passed through a 40-60 mesh sieve, and enzymatic hydrolysis was performed by adding a compound enzyme, which included cellulase and pectinase. After enzymatic hydrolysis, ultrasonic-assisted extraction was performed, the supernatant was collected by centrifugation, the supernatant was concentrated and spray-dried to obtain dandelion-Atractylodes lancea compound extract powder. S4, Feed preparation: Mix yeast selenium-allicin complex, dandelion-Atractylodes lancea compound extract powder, basic feed ingredients, compound vitamin premix and compound mineral premix and granulate to obtain heat stress resistant feed.

[0010] Furthermore, in S1, the compound probiotics include lactobacillus and brewer's yeast, with an inoculation amount of 5%-10%, a fermentation temperature of 32℃, and a fermentation time of 36 hours.

[0011] Furthermore, in S2, the protective agents are sodium alginate and chitosan, and the microencapsulation is performed using a spray condensation method.

[0012] Furthermore, in S3, the amount of compound enzyme added is 0.5%-1.5% of the raw material mass, the enzymatic hydrolysis temperature is 45-55℃, the enzymatic hydrolysis time is 1-2 hours, and the pH is 4.5-5.5.

[0013] Furthermore, in S3, the conditions for ultrasound-assisted extraction are: power 300-500W, time 20-40 minutes, and extraction solvent is a 50%-70% water or ethanol aqueous solution by volume.

[0014] Furthermore, in S4, the basic feed ingredients include corn, soybean meal, fish meal, and dicalcium phosphate; the addition amount of dandelion-Atractylodes lancea compound extract powder is 0.5%-1.5%, and the addition amount of yeast selenium-allicin complex is 0.1%-0.3%.

[0015] The above approach has the following beneficial effects: 1. In this program, yeast selenium, as an organic selenium source, has high bioavailability and can effectively enhance the antioxidant capacity of broilers, reduce oxidative damage caused by heat stress, and strengthen immunity.

[0016] Allicin has natural antibacterial, anti-inflammatory, and immunomodulatory functions. It can improve gut health, inhibit the growth of pathogens, and work with selenium to enhance the body's stress resistance.

[0017] Dandelion has the effects of clearing heat and detoxifying, promoting diuresis and reducing swelling, which helps to alleviate water metabolism disorders and inflammatory responses caused by heat stress.

[0018] Atractylodes lancea can strengthen the spleen and dry dampness, enhance appetite, and improve the decline in digestive function and reduced food intake caused by heat stress.

[0019] Wheat bran, glucose, and dextrin serve as carriers and energy sources, contributing to the stability and absorption of active ingredients while providing easily digestible carbohydrates to support energy supply.

[0020] Multivitamin and mineral premix provides comprehensive nutrition, maintains metabolic balance, and further enhances stress resistance.

[0021] The ingredients are combined in a scientific ratio to exert a synergistic effect, which not only significantly improves the heat stress resistance of broilers, but also promotes growth performance and improves meat quality, achieving a dual improvement in nutrition and function.

[0022] 2. This method activates yeast selenium through solid-state fermentation, improving its bioactivity and absorption rate, and enhancing its antioxidant and immunomodulatory functions. Microencapsulation technology is used to treat yeast selenium and allicin, effectively protecting allicin from degradation, improving stability, prolonging the duration of action, and achieving a sustained-release effect. Compound enzymatic hydrolysis and ultrasound-assisted extraction of dandelion and Atractylodes lancea fully release active ingredients, improving extraction efficiency and purity, and enhancing their anti-inflammatory, antioxidant, and metabolic regulating functions. The overall preparation process is scientifically sound, highly operable, and suitable for large-scale production. The resulting feed pellets are uniform, stable, easy to store and feed, and have promising application prospects.

[0023] 3. Through the organic combination of these components and processes, this invention significantly improves the adaptability, health level, and production performance of broilers in high-temperature environments, and has obvious practical value and promotion significance.

[0024] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the method steps in an embodiment of the present invention for preparing an anti-heat stress feed based on a combination of yeast selenium and allicin. Detailed Implementation

[0026] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0029] The following detailed description illustrates the specific implementation method: Example 1:

[0030] A heat stress-resistant feed based on a combination of yeast selenium and allicin comprises the following components by weight: 1-5 parts yeast selenium, 2-8 parts allicin, 10-30 parts dandelion, 5-15 parts Atractylodes lancea, 20-40 parts wheat bran, 5-10 parts glucose, 10-20 parts dextrin, 1-3 parts compound vitamin premix, and 1-3 parts compound mineral premix.

[0031] Example 2:

[0032] The difference from Example 1 is that it includes the following components by weight: 1 part yeast selenium, 2 parts allicin, 10 parts dandelion, 5 parts Atractylodes lancea, 20 parts wheat bran, 5 parts glucose, 10 parts dextrin, 1 part compound vitamin premix, and 1 part compound mineral premix.

[0033] Example 3:

[0034] The difference from Example 2 is that it includes the following components by weight: 3 parts yeast selenium, 5 parts allicin, 20 parts dandelion, 10 parts Atractylodes lancea, 30 parts wheat bran, 7 parts glucose, 15 parts dextrin, 2 parts compound vitamin premix and 2 parts compound mineral premix.

[0035] Example 4:

[0036] The difference from Example 3 is that it includes the following components by weight: 5 parts yeast selenium, 8 parts allicin, 30 parts dandelion, 15 parts Atractylodes lancea, 40 parts wheat bran, 10 parts glucose, 20 parts dextrin, 3 parts compound vitamin premix and 3 parts compound mineral premix.

[0037] Example 5:

[0038] As attached Figure 1 As shown, the difference from Example 4 is that a method for preparing an anti-heat stress feed based on a yeast selenium and allicin complex, based on the weight proportions of the anti-heat stress feed based on a yeast selenium and allicin complex as described in any one of Examples 1-4, includes the following steps: S1, Yeast Selenium Treatment: Yeast selenium is mixed with wheat bran and glucose, and then inoculated with compound probiotics for solid-state fermentation. The compound probiotics include lactobacillus and brewer's yeast. The inoculation amount is 5%-10%, the fermentation temperature is 32℃, and the fermentation time is 36 hours. The fermentation product is dried to obtain activated yeast selenium. S2, Allicin treatment: Allicin and activated yeast selenium were mixed in a mass ratio of 1:5-1:10, and dextrin and a protectant were added for microencapsulation. The protectant was sodium alginate and chitosan. The microencapsulation was carried out by spray condensation to obtain yeast selenium-allicin complex. S3, Preparation of Extract: Dried dandelion whole herb and Atractylodes rhizome are mixed and pulverized in a mass ratio of 2:1-4:1, passed through a 40-60 mesh sieve, and enzymatic hydrolysis is performed by adding a compound enzyme, which includes cellulase and pectinase. The amount of compound enzyme added is 0.5%-1.5% of the raw material mass, the hydrolysis temperature is 45-55℃, the hydrolysis time is 1-2 hours, and the pH is 4.5-5.5. After enzymatic hydrolysis, ultrasonic-assisted extraction is performed. The ultrasonic-assisted extraction conditions are: power 300-500W, time 20-40 minutes, and the extraction solvent is 50%-70% water or ethanol aqueous solution by volume. The supernatant is collected by centrifugation, concentrated, and spray-dried to obtain dandelion-Atractylodes compound extract powder. S4, Feed preparation: Mix and granulate yeast selenium-allicin complex, dandelion-Atractylodes lancea compound extract powder, basic feed ingredients, compound vitamin premix and compound mineral premix. The basic feed ingredients include corn, soybean meal, fish meal and dicalcium phosphate; the addition amount of dandelion-Atractylodes lancea compound extract powder is 0.5%-1.5%, and the addition amount of yeast selenium-allicin complex is 0.1%-0.3%; thus, heat stress resistant feed is obtained.

[0039] The specific implementation process is as follows: Experiment 1: Verification of the advantages of the formula of this invention compared with commercially available heat stress-resistant chicken feed 1. Experimental Design Experimental animals: 200 healthy 1-day-old Taihe black-bone chickens were randomly divided into 2 groups of 100 each.

[0040] Group processing: Experimental group: fed with the heat stress-resistant feed formulated in Example 3 of this invention (3 parts yeast selenium, 5 parts allicin, 20 parts dandelion, etc., granulated according to the preparation method).

[0041] Control group: fed with commercially available conventional heat stress-resistant chicken feed (containing vitamin C and electrolytes).

[0042] Feeding conditions: The feeding cycle is 100 days. The temperature is 32℃±2℃ for the first 28 days and 35℃±2℃ for the next 72 days. The relative humidity is 60%±5%. Feed and water are available freely.

[0043] Testing indicators: Growth performance: Record mortality rate and feed conversion ratio (FCR).

[0044] Antioxidant indicators: Blood was collected on day 100 to measure serum malondialdehyde (MDA) concentration, superoxide dismutase (SOD) activity, and glutathione peroxidase (GSH-Px) activity.

[0045] Selenium content: Detects the selenium content in muscle tissue.

[0046] 2. Experimental Procedure Feed preparation: The experimental group feed was prepared according to Example 3, and the control group feed was purchased from the market.

[0047] Broilers were raised in groups, and their feed intake and mortality were recorded daily.

[0048] On the morning of the 100th day, blood was collected on an empty stomach, serum was separated, and stored at -80℃ for testing; pectoral muscle tissue was taken to detect selenium content.

[0049] 3. Experimental Results Table 1. Detection of Difference Rates in Antioxidant and Selenium Content in Feed detection indicators experimental group control group Difference rate mortality rate(%) 1.71 4.54 ↓62.33% Meat-to-fat ratio 6.38±1.25 9.03±3.30 ↓29.35% Muscle selenium content (mg / kg) 0.19±0.02 0.094±0.01 ↑102.1% Malondialdehyde (MDA) (nmol / mL) 1.03±0.25 1.54±0.17 ↓33.12% Total superoxide dismutase (SOD) (U / mL) 288.32±45.10 182.99±36.90 ↑57.56% Glutathione peroxidase (GSH-Px) (nmol / min / mL) 274.19±52.60 179.02±1.81 ↑53.16% 4. Conclusion: The feed of this invention, through a compound formulation of yeast selenium and allicin, combined with dandelion-Atractylodes lancea extract, significantly improved the heat stress resistance of broilers. The selenium content in muscle was increased by 102.1% compared to commercially available feeds, indicating that the activation treatment of yeast selenium effectively improved the bioavailability of selenium; MDA concentration decreased by 33.12%, and SOD and GSH-Px activities increased by 57.56% and 53.16%, respectively, confirming enhanced antioxidant system function; mortality rate decreased by 62.33%, and feed conversion ratio improved by 29.35%, indicating that the formulation can significantly improve the growth performance of broilers under heat stress.

[0050] Experiment 2: Verification of the advantages of the preparation method of this invention compared with existing technologies 1. Experimental Design Experimental animals: 500 healthy 1-day-old Taihe black-bone chickens were randomly divided into 5 groups of 100 each.

[0051] Group processing: Control group: fed with commercially available conventional heat stress-resistant chicken feed.

[0052] Control group 1: Used unactivated yeast selenium (directly mixed, unfermented) + allicin, with other components the same as the experimental group.

[0053] Control group 2: Dandelion extract alone + Atractylodes lancea extract alone (without combined enzymatic hydrolysis and ultrasonic treatment), other components are the same as the experimental group.

[0054] Control group 3: Allicin without microencapsulation (directly added) + activated yeast selenium, other components are the same as the experimental group.

[0055] Experimental group: The formulation and preparation method of Example 3 of this invention (yeast selenium activation + dandelion-Atractylodes lancea compound extraction + allicin microencapsulation) were used.

[0056] Feeding conditions: Same as Experiment 1, with high temperature stress lasting for 72 days.

[0057] Testing indicators: Immune markers: Blood was collected on day 100 to detect serum immunoglobulins IgG and IgM, and cytokines IFN-γ, IL-4, IL-5, and IL-10.

[0058] Antioxidant and selenium content: Same as Experiment 1 (MDA, SOD, GSH-Px, muscle selenium content).

[0059] 2. Experimental Procedure Feeds were prepared according to the treatment of each group: the activation, compound extraction and microencapsulation steps of control groups 1-3 were omitted respectively, and the remaining steps remained unchanged.

[0060] Broiler chickens are raised in groups, and their growth data is recorded.

[0061] On day 100, serum immune indicators, antioxidant indicators, and muscle selenium content were measured.

[0062] 3. Experimental Results Table 2. Test table of selenium content difference rate in feed preparation methods detection indicators Blank group Control group 1 Control group 2 Control group 3 experimental group mortality rate(%) 4.54 2.7 3.25 2.5 1.71 Muscle selenium content (mg / kg) 0.094±0.01 0.15±0.02 0.10±0.01 0.17±0.02 0.19±0.02 Malondialdehyde (MDA) (nmol / mL) 1.54±0.17 1.39±0.14 1.44±0.13 1.10±0.13 1.03±0.25 Total superoxide dismutase (SOD) (U / mL) 182.99±36.90 215.69±25.75 207.63±27.07 240.23±67.21 288.32±45.10 Glutathione peroxidase (GSH-Px) (nmol / min / mL) 179.02±1.81 185.05±2.49 194.98±27.19 241.87±15.60 274.19±52.60 IgG (ug / mL) 207.90±26.69 219.09±29.60 248.13±50.26 280.76±41.45 320.73±55.33 IgM / (ug / mL) 105.16±15.51 115.20±26.55 113.97±22.43 138.63±29.97 171.74±25.15 IFN-γ (pg / mL) 132.39±25.92 149.58±19.74 158.83±28.99 170.66±24.81 176.54±28.84 IL-4 (pg / mL) 94.58±24.94 111.10±27.84 105.21±26.83 134.09±26.96 140.96±34.24 IL-5 (pg / mL) 188.78±34.86 222.81±37.19 225.44±42.55 270.42±39.61 362.59±45.03 IL-10 / (ng / L) 18.15±2.35 22.15±2.91 23.96±4.91 25.47±2.50 28.74±6.52 4. Conclusion: The necessity of yeast selenium activation treatment: In control group 1, where yeast selenium was not activated, the muscle selenium content was only 78.95% of that in the experimental group, and the increase in antioxidant enzyme activity was reduced, indicating that probiotic fermentation can enhance the biological activity of yeast selenium.

[0063] Advantages of dandelion-Atractylodes compound extraction: When the extract was used alone in control group 2, the increase in immune indicators (such as IgM and IFN-γ) was lower than that in the experimental group, indicating that compound enzymatic hydrolysis and ultrasonic extraction can synergistically enhance the antioxidant and immunomodulatory effects of plant components.

[0064] Synergistic effect of allicin microencapsulation: In the control group 3 without microencapsulation treatment, the MDA concentration and the degree of improvement in immune indicators were lower than those in the experimental group, which confirms that microencapsulation can protect the stability of allicin and form a synergistic antioxidant system with activated yeast selenium.

[0065] Overall synergy: The experimental group showed the best performance in mortality, selenium content, antioxidant and immune indicators compared with the control groups, indicating that the combined treatment of yeast selenium activation, dandelion-Atractylodes lancea compound extraction and allicin microencapsulation can significantly improve the heat stress resistance of broilers by enhancing selenium absorption, antioxidant capacity and immune function.

[0066] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A heat stress-resistant feed based on a combination of yeast selenium and allicin, characterized in that, It consists of the following components by weight: 1-5 parts yeast selenium, 2-8 parts allicin, 10-30 parts dandelion, 5-15 parts Atractylodes lancea, 20-40 parts wheat bran, 5-10 parts glucose, 10-20 parts dextrin, 1-3 parts compound vitamin premix and 1-3 parts compound mineral premix.

2. The heat stress-resistant feed based on yeast selenium and allicin compound according to claim 1, characterized in that, It consists of the following components by weight: 1 part yeast selenium, 2 parts allicin, 10 parts dandelion, 5 parts Atractylodes lancea, 20 parts wheat bran, 5 parts glucose, 10 parts dextrin, 1 part compound vitamin premix, and 1 part compound mineral premix.

3. The heat stress-resistant feed based on yeast selenium and allicin compound according to claim 1, characterized in that, It consists of the following components by weight: 3 parts yeast selenium, 5 parts allicin, 20 parts dandelion, 10 parts Atractylodes lancea, 30 parts wheat bran, 7 parts glucose, 15 parts dextrin, 2 parts compound vitamin premix, and 2 parts compound mineral premix.

4. The heat stress-resistant feed based on yeast selenium and allicin compound according to claim 1, characterized in that, It consists of the following components by weight: 5 parts yeast selenium, 8 parts allicin, 30 parts dandelion, 15 parts Atractylodes lancea, 40 parts wheat bran, 10 parts glucose, 20 parts dextrin, 3 parts compound vitamin premix, and 3 parts compound mineral premix.

5. A method for preparing an anti-heat stress feed based on a yeast selenium and allicin complex, based on the weight proportions of the anti-heat stress feed based on a yeast selenium and allicin complex according to any one of claims 1-4, characterized in that, Includes the following steps: S1, Yeast Selenium Treatment: Yeast selenium is mixed with wheat bran and glucose, inoculated with compound probiotics for solid-state fermentation, and the fermentation product is dried to obtain activated yeast selenium. S2, Allicin treatment: Allicin and activated yeast selenium are mixed in a mass ratio of 1:5-1:10, dextrin and protectant are added for microencapsulation to obtain yeast selenium-allicin complex. S3, Preparation of extract: The dried whole dandelion herb and the rhizome of Atractylodes lancea were mixed and pulverized in a mass ratio of 2:1-4:1, passed through a 40-60 mesh sieve, and enzymatic hydrolysis was performed by adding a compound enzyme, which included cellulase and pectinase. After enzymatic hydrolysis, ultrasonic-assisted extraction was performed, the supernatant was collected by centrifugation, the supernatant was concentrated and spray-dried to obtain dandelion-Atractylodes lancea compound extract powder. S4, Feed preparation: Mix yeast selenium-allicin complex, dandelion-Atractylodes lancea compound extract powder, basic feed ingredients, compound vitamin premix and compound mineral premix and granulate to obtain heat stress resistant feed.

6. The method for preparing the heat stress-resistant feed based on the compound of yeast selenium and allicin according to claim 5, characterized in that, In S1, the compound probiotics include Lactobacillus and Saccharomyces cerevisiae, with an inoculation amount of 5%-10%, a fermentation temperature of 32℃, and a fermentation time of 36 hours.

7. The method for preparing the heat stress-resistant feed based on the compound of yeast selenium and allicin according to claim 6, characterized in that, In S2, the protective agents are sodium alginate and chitosan, and the microencapsulation is carried out using the spray condensation method.

8. The method for preparing the heat stress-resistant feed based on the compound of yeast selenium and allicin according to claim 7, characterized in that, In S3, the amount of compound enzyme added is 0.5%-1.5% of the raw material mass, the enzymatic hydrolysis temperature is 45-55℃, the enzymatic hydrolysis time is 1-2 hours, and the pH is 4.5-5.

5.

9. The method for preparing the heat stress-resistant feed based on the compound of yeast selenium and allicin according to claim 8, characterized in that, In S3, the conditions for ultrasonic-assisted extraction are: power 300-500W, time 20-40 minutes, and extraction solvent is a 50%-70% water or ethanol aqueous solution by volume.

10. The method for preparing the heat stress-resistant feed based on the compound of yeast selenium and allicin according to claim 9, characterized in that, In S4, the basic feed ingredients include corn, soybean meal, fish meal, and dicalcium phosphate; the addition amount of dandelion-Atractylodes lancea compound extract powder is 0.5%-1.5%, and the addition amount of yeast selenium-allicin complex is 0.1%-0.3%.

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