Compound feed for promoting growth of broiler chickens and preparation method of compound feed

Abstract

The present invention discloses a broiler chicken growth promoting compound feed and a preparation method thereof, and belongs to the technical field of poultry feeds, and the broiler chicken growth promoting compound feed comprises the following raw materials in parts by weight: 45-55 parts of corn, 35-40 parts of soybean meal, 2-4 parts of tenebrio molitor powder, 2-3 parts of bone meal, 6-8 parts of wheat middling, 1-2 parts of medical stone and 2-3 parts of a traditional Chinese medicine extract, the feed additive is prepared from the following raw materials in parts by weight: 2-3 parts of mulberry leaf powder, 4-7 parts of an apple peel extract, 0.2-0.5 part of a Chinese wolfberry fruit extract, 10-20 parts of xylooligosaccharide and 1-2 parts of a compound probiotic preparation. The compound feed provided by the invention can effectively promote the growth of broiler chickens, the preparation method can effectively retain nutritional ingredients, and the whole scheme is beneficial to improving the breeding efficiency and meat quality of the broiler chickens and has remarkable economic and ecological benefits.

Description

Technical Field

[0001] The present invention belongs to the technical field of poultry feed, and particularly relates to a compound feed for promoting the growth of broiler chickens and a preparation method thereof. Background Art

[0002] At present, significant progress has been made in the technology of compound feeds for promoting broiler growth, mainly by optimizing nutrient ratios, using additives, and introducing functional ingredients to improve growth rate and feed utilization. Common compound feeds include energy feeds (such as corn, wheat), protein feeds (such as soybean meal, fish meal), and trace components such as minerals, vitamins, and amino acids. In addition, functional additives such as enzyme preparations, probiotics, and acidifiers are often added to the feed to improve digestion and absorption, enhance immunity, and reduce disease occurrence.

[0003] However, the existing technology still faces some challenges. First, the prices of feed raw materials fluctuate greatly, especially the high costs of protein sources (such as fish meal, soybean meal), which affect the economy and sustainability of the feed. Second, the over-reliance on antibiotic growth promoters has led to an increasingly serious problem of drug resistance, and many countries and regions have restricted or prohibited the use of antibiotics in feeds, which poses higher requirements for the research and development of alternative technologies. Third, the effects of functional additives (such as enzyme preparations, probiotics) are affected by various factors, including feed ingredients, storage conditions, and animal individual differences, and their stability and consistency still need to be further optimized. In addition, the anti-nutritional effects of certain components in the feed (such as phytic acid phosphorus) have not been completely solved, affecting the utilization rate of nutrients.

[0004] Therefore, how to provide an efficient, environmentally friendly, and economical compound feed for promoting broiler growth is a technical problem that needs to be urgently solved by those skilled in the art. Summary of the Invention

[0005] To solve the above technical problems, the present invention proposes a compound feed for promoting broiler growth and a preparation method thereof.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A compound feed for promoting broiler growth, comprising the following raw materials in parts by weight:

[0008] 45 - 55 parts of corn, 35 - 40 parts of soybean meal, 2 - 4 parts of yellow mealworm powder, 2 - 3 parts of bone meal, 6 - 8 parts of wheat middlings, 1 - 2 parts of medical stone, 2 - 3 parts of Chinese herbal medicine extract, 2 - 3 parts of mulberry leaf powder, 4 - 7 parts of apple peel extract, 0.2 - 0.5 parts of wolfberry extract, 10 - 20 parts of xylo-oligosaccharide, and 1 - 2 parts of compound probiotic preparation.

[0009] Beneficial effects: The compound feed of the present invention realizes the synergistic effect of energy supply, nutritional enhancement and metabolic regulation by scientifically proportioning various raw materials. Among them, corn and soybean meal form a high-energy - high-protein basis, meeting the energy requirements for the rapid weight gain of broilers and supplementing essential amino acids, and their proportion is highly matched with the requirements of the broiler growth stage; yellow mealworm powder provides insect protein and chitin, which complements the plant protein of soybean meal and optimizes the amino acid balance; bone meal and medical stone synergistically regulate the metabolism of calcium, phosphorus and trace elements (zinc, selenium), promote bone development and adsorb intestinal toxins; the traditional Chinese medicine extract and mulberry leaf powder integrate active ingredients such as astragalus and hawthorn, enhance the immunity of broilers (increase IgG) and inhibit fat deposition through mulberry DNJ, and jointly proliferate probiotics with xylo-oligosaccharide, forming a "dual-effect regulation of immunity - metabolism"; apple peel extract and wolfberry extract synergistically scavenge free radicals through polyphenols and polysaccharides, reducing the impact of oxidative stress on growth performance; the compound probiotic preparation and xylo-oligosaccharide construct a "bacteria - prebiotic symbiotic system", significantly increasing the production of short-chain fatty acids (such as butyric acid), reducing the feed-to-meat ratio and ammonia emissions. Finally, the synergistic effect of each component of the compound feed obtained by the present invention makes the feed outstanding in promoting the growth, disease resistance and meat quality improvement of broilers.

[0010] Preferably, the traditional Chinese medicine extract comprises the following raw materials in parts by weight:

[0011] 25 - 30 parts of astragalus, 20 - 25 parts of hawthorn, 10 - 15 parts of dried tangerine peel, 0.5 - 1 part of codonopsis pilosula, 5 - 10 parts of pulsatilla chinensis, 5 - 8 parts of pine needle powder, 3 - 5 parts of licorice, 1 - 3 parts of semen platycladi.

[0012] Beneficial effects: The above traditional Chinese medicine extract realizes the increase of daily weight gain and the decrease of mortality of broilers through the synergistic effect of immune regulation (astragalus + codonopsis pilosula), digestion promotion and antibacterial and anti-inflammatory effects, and enhances the growth performance of broilers through the synergism of multiple components. Among them, the compatibility of astragalus and codonopsis pilosula can increase the level of immunoglobulin (IgG) and reduce stress response; hawthorn and dried tangerine peel synergistically promote the activity of pepsin and improve feed conversion rate; the combination of pulsatilla chinensis and pine needle powder inhibits pathogenic bacteria such as Escherichia coli and regulates the balance of intestinal flora; licorice and semen platycladi synergistically antioxidant through flavonoids and oil components, reducing liver damage.

[0013] Preferably, the preparation method of the traditional Chinese medicine extract comprises the following steps:

[0014] (1) Mix the astragalus, hawthorn, dried tangerine peel and semen platycladi, and then add an ethanol solution for ultrasonic extraction to obtain a first extract;

[0015] (2) Mix the codonopsis pilosula, pulsatilla chinensis, licorice and pine needle powder, and then decoct with water to obtain a second extract;

[0016] (3) Combine the first extract and the second extract, and then carry out vacuum concentration and spray drying to obtain the traditional Chinese medicine extract.

[0017] Preferably, the concentration of the ethanol solution is 60%, and the addition amount is 1:(6 - 8) of the material - liquid ratio.

[0018] Preferably, the ultrasonic extraction specifically includes the following steps: filtering after ultrasonic extraction for 1 - 1.5 h under the conditions of an ultrasonic power of 200 - 500 W and a temperature of 55 - 65°C, then adding the ethanol solution to the obtained filter residue again and repeating the above extraction process, and finally combining the extraction liquids to obtain the first extraction liquid.

[0019] Preferably, the decocting with water specifically includes the following steps: boiling with water and then simmering for 1 - 1.5 h, filtering, then adding water to the obtained filter residue again and repeating the above decocting process, and finally combining the extraction liquids to obtain the second extraction liquid.

[0020] Beneficial effects: The present invention uses an ethanol solution to extract flavonoid compounds from astragalus membranaceus, hawthorn, tangerine peel, and semen platycladi, and at the same time uses water as an extraction solvent to extract water - soluble components from codonopsis pilosula, pulsatilla chinensis, licorice, and pine needle powder, fully extracting the active ingredients in different traditional Chinese medicine components and using them in broiler feed, effectively improving the effect of the traditional Chinese medicine extract.

[0021] Preferably, the compound probiotic preparation includes Bacillus subtilis ≥ 1×10 9 CFU / g, Lactobacillus ≥ 5×10 8 CFU / g, and Bacillus licheniformis ≥ 1×10 8 CFU / g.

[0022] Beneficial effects: In the compound probiotic preparation, Bacillus subtilis can secrete protease to accelerate feed decomposition and inhibit pathogenic bacteria, Lactobacillus maintains the acidic environment of the intestine and promotes nutrient absorption, Bacillus licheniformis strengthens antibacterial and digestive enzyme activities, and at the same time can enhance the cellulose degradation ability and improve feed utilization rate. The three work together to reduce ammonia emissions, improve feed conversion rate and enhance the level of immunoglobulin.

[0023] A preparation method of a compound feed for promoting the growth of broilers includes the following steps:

[0024] Crushing the corn and soybean meal and then performing high - temperature instantaneous sterilization, then mixing the corn, soybean meal, wheat middlings, bone meal, medical stone, and yellow mealworm powder evenly, then successively adding the traditional Chinese medicine extract, mulberry leaf powder, apple peel extract, wolfberry extract, and xylo - oligosaccharide and continuing to mix, and finally adding the compound probiotic preparation and mixing evenly, and then granulating at low temperature to obtain the compound feed for promoting the growth of broilers.

[0025] Preferably, the temperature of the low - temperature granulation is 30 - 65°C, and the particle size is 2 - 3 mm.

[0026] Preferably, the temperature for high-temperature sterilization is 110 - 130 °C and the time is 12 - 17 s.

[0027] Compared with the prior art, the present invention has the following advantages and technical effects:

[0028] The compound feed provided by the present invention effectively promotes the growth of broiler chickens by scientifically proportioning a variety of raw materials, including traditional feed components and special additives such as yellow mealworm powder, Chinese herbal medicine extract, apple peel, and wolfberry extract, in combination with a compound probiotic preparation. Moreover, the preparation method pays attention to the sterilization and uniform mixing of raw materials, and adopts low-temperature granulation technology to retain nutrients. The overall solution helps to improve the breeding efficiency and meat quality of broiler chickens, and has significant economic and ecological benefits. Specific Embodiments

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0030] To make the above objects, features, and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to specific embodiments.

[0031] In the embodiments of the present invention, wheat middlings are by-products generated during the wheat processing process, between bran and flour, mainly composed of fine bran scraps, part of the endosperm, aleurone layer, and seed coat. Bone meal is a powder made from animal bones, mainly composed of tricalcium phosphate, bone glue, and fat.

[0032] Unless otherwise specified, the raw materials in the embodiments of the present invention are all obtained through commercial channels; as an example, the wheat middlings used in the embodiments are purchased from Lingshou Qingyun Agricultural Products Trading Co., Ltd. The bone meal is purchased from Haixing Zhengfa Feed Sales Co., Ltd. The mulberry leaf powder is made by grinding dried mulberry leaves. The soybean meal is collected from a local soybean food processing factory; the yellow mealworm powder is made by grinding dried yellow mealworms. The apple extract and wolfberry extract are both purchased from Shaanxi Xinyang Biotechnology Co., Ltd. The Bacillus subtilis, Lactobacillus, and Bacillus licheniformis bacterial agents are all purchased from Shandong Runwo Biotechnology Co., Ltd.

[0033] Unless otherwise specified, the room temperature or normal temperature in the embodiments of the present invention refers to 25 ± 3 °C.

[0034] Example 1

[0035] A compound feed for promoting the growth of broiler chickens, comprising the following raw materials in parts by weight:

[0036] 50 parts of corn, 38 parts of soybean meal, 3 parts of yellow mealworm powder, 2 parts of bone meal, 7 parts of wheat middlings, 1.5 parts of medical stone, 2 parts of traditional Chinese medicine extract, 3 parts of mulberry leaf powder, 6 parts of apple peel extract, 0.4 part of wolfberry extract, 15 parts of xylo-oligosaccharide and 1 part of compound probiotic preparation.

[0037] Among them, the traditional Chinese medicine extract includes raw materials in the following parts by weight:

[0038] 28 parts of astragalus membranaceus, 23 parts of hawthorn, 12 parts of dried tangerine peel, 0.8 part of codonopsis pilosula, 7 parts of pulsatilla chinensis, 6 parts of pine needle powder, 4 parts of liquorice, 2 parts of semen platycladi.

[0039] The compound probiotic preparation includes bacillus subtilis ≥ 1×10 9 CFU / g, lactic acid bacteria ≥ 5×10 8 CFU / g and bacillus licheniformis ≥ 1×10 8 CFU / g.

[0040] A preparation method of a compound feed for promoting the growth of broilers, comprising the following steps:

[0041] 1. Preparation of the traditional Chinese medicine extract:

[0042] (1) Crush the raw materials of the traditional Chinese medicine extract and then sieve.

[0043] (2) Mix astragalus membranaceus, hawthorn, dried tangerine peel and semen platycladi, add an ethanol solution with a mass concentration of 60%, with a solid-liquid ratio of 1:7, carry out ultrasonic extraction for 1 h under the conditions of an ultrasonic power of 300 W and a temperature of 60°C, then filter, and add the ethanol solution to the obtained filter residue again to repeat the above extraction process. After the extraction is completed, combine the extraction liquids to obtain a first extraction liquid.

[0044] (3) Mix codonopsis pilosula, pulsatilla chinensis, liquorice and pine needle powder, boil with water and then simmer for 1 h. After filtration, add water to the obtained filter residue again to repeat the above simmering process, and finally combine the extraction liquids to obtain a second extraction liquid.

[0045] (4) Combine the first extraction liquid and the second extraction liquid, and carry out vacuum concentration and spray drying to obtain the traditional Chinese medicine extract.

[0046] 2. Preparation of the compound feed

[0047] Crush corn and soybean meal to a particle size ≤ 1.5 mm, carry out high-temperature instantaneous sterilization at 120°C for 15 s, sieve bone meal and medical stone through 80-mesh sieves respectively, then mix corn, soybean meal, wheat middlings, bone meal, medical stone and yellow mealworm powder evenly, then sequentially add the traditional Chinese medicine extract, mulberry leaf powder, apple peel extract, wolfberry extract and xylo-oligosaccharide and continue to mix, and finally add the compound probiotic preparation and mix evenly, and then carry out low-temperature granulation at 60°C, controlling the particle size to be 2-3 mm, thus obtaining the compound feed for promoting the growth of broilers.

[0048] Example 2

[0049] A compound feed for promoting the growth of broilers, comprising the following raw materials in parts by weight:

[0050] 45 parts of corn, 35 parts of soybean meal, 4 parts of yellow mealworm powder, 3 parts of bone meal, 8 parts of secondary flour, 1 part of medical stone, 3 parts of Chinese herbal medicine extract, 3 parts of mulberry leaf powder, 4 parts of apple peel extract, 0.2 part of wolfberry extract, 10 parts of xylo-oligosaccharide and 2 parts of compound probiotic preparation.

[0051] Among them, the Chinese herbal medicine extract comprises the following raw materials in parts by weight:

[0052] 30 parts of astragalus membranaceus, 20 parts of hawthorn, 10 parts of dried tangerine peel, 1 part of codonopsis pilosula, 5 parts of pulsatilla chinensis, 5 parts of pine needle powder, 5 parts of liquorice, 1 part of semen platycladi.

[0053] The compound probiotic preparation includes Bacillus subtilis ≥1×10 9 CFU / g, Lactobacillus ≥5×10 8 CFU / g and Bacillus licheniformis ≥1×10 8 CFU / g.

[0054] A preparation method of a compound feed for promoting the growth of broilers, comprising the following steps:

[0055] 1. Preparation of Chinese herbal medicine extract:

[0056] (1) Crush the raw materials of the Chinese herbal medicine extract and then sieve them;

[0057] (2) Mix astragalus membranaceus, hawthorn, dried tangerine peel and semen platycladi, add an ethanol solution with a mass concentration of 60%, the solid-liquid ratio is 1:8, carry out ultrasonic extraction for 1.5 h under the conditions of an ultrasonic power of 250 W and a temperature of 55 °C, then filter, and add the ethanol solution to the obtained filter residue again to repeat the above extraction process. After the extraction is completed, combine the extraction liquids to obtain the first extraction liquid;

[0058] (3) Mix codonopsis pilosula, pulsatilla chinensis, liquorice and pine needle powder, boil them with water and then simmer for 1.5 h. After filtration, add water to the obtained filter residue again to repeat the above simmering process. Finally, combine the extraction liquids to obtain the second extraction liquid;

[0059] (4) Combine the first extraction liquid and the second extraction liquid, and carry out vacuum concentration and spray drying to obtain the Chinese herbal medicine extract.

[0060] 2. Preparation of compound feed

[0061] Crush corn and soybean meal to a particle size of ≤1.5 mm, instantaneously sterilize at 130 °C for 12 s, sieve bone meal and medical stone through 80-mesh sieve respectively, then mix corn, soybean meal, wheat middlings, bone meal, medical stone and yellow mealworm powder evenly, then successively add Chinese herbal medicine extract, mulberry leaf powder, apple peel extract, wolfberry extract and xylo-oligosaccharide and continue to mix. Finally, add compound probiotic preparation and mix evenly, then granulate at a low temperature of 65 °C, and control the particle size to be 2-3 mm to obtain the compound feed for promoting the growth of broilers.

[0062] Example 3

[0063] A compound feed for promoting the growth of broilers, comprising the following raw materials in parts by weight:

[0064] 55 parts of corn, 40 parts of soybean meal, 2 parts of yellow mealworm powder, 2 parts of bone meal, 6 parts of wheat middlings, 2 parts of medical stone, 2 parts of Chinese herbal medicine extract, 2 parts of mulberry leaf powder, 7 parts of apple peel extract, 0.5 part of wolfberry extract, 20 parts of xylo-oligosaccharide and 1 part of compound probiotic preparation.

[0065] Among them, the Chinese herbal medicine extract comprises the following raw materials in parts by weight:

[0066] 25 parts of astragalus membranaceus, 25 parts of hawthorn, 15 parts of dried tangerine peel, 0.5 part of codonopsis pilosula, 10 parts of pulsatilla chinensis, 8 parts of pine needle powder, 3 parts of licorice, 3 parts of semen platycladi.

[0067] The compound probiotic preparation includes Bacillus subtilis ≥1×10 9 CFU / g, Lactobacillus ≥5×10 8 CFU / g and Bacillus licheniformis ≥1×10 8 CFU / g.

[0068] A preparation method of a compound feed for promoting the growth of broilers, comprising the following steps:

[0069] 1. Preparation of Chinese herbal medicine extract:

[0070] (1) Crush the raw materials of the Chinese herbal medicine extract and then sieve.

[0071] (2) Mix astragalus membranaceus, hawthorn, dried tangerine peel and semen platycladi, add ethanol solution with a mass concentration of 60%, the solid-liquid ratio is 1:6, under the conditions of an ultrasonic power of 450 W and 65 °C, ultrasonically extract for 1 h and then filter, and then add ethanol solution to the obtained filter residue again to repeat the above extraction process. After the extraction is completed, combine the extraction solutions to obtain the first extraction solution.

[0072] (3) Mix codonopsis pilosula, pulsatilla chinensis, licorice and pine needle powder, boil with water and then decoct with slow fire for 1 h, filter, and then add water to the obtained filter residue again to repeat the above decocting process. Finally, combine the extraction solutions to obtain the second extraction solution.

[0073] (4) Combine the first extract and the second extract, and subject them to vacuum concentration and spray drying to obtain a traditional Chinese medicine extract.

[0074] 2. Preparation of compound feed

[0075] Crush corn and soybean meal to a particle size of ≤ 1.5 mm, and sterilize them instantaneously at a high temperature of 110 °C for 17 s. Pass bone meal and medical stone through an 80-mesh sieve respectively. Then mix corn, soybean meal, wheat middlings, bone meal, medical stone, and yellow mealworm powder evenly. Then sequentially add the traditional Chinese medicine extract, mulberry leaf powder, apple peel extract, wolfberry extract, and xylo-oligosaccharide and continue mixing. Finally, add the compound probiotic preparation and mix evenly, and then granulate at a low temperature of 40 °C, controlling the particle size to be 2 - 3 mm, thus obtaining the compound feed for promoting the growth of broiler chickens.

[0076] Comparative Example 1

[0077] A compound feed for promoting the growth of broiler chickens, which is different from Example 1 only in that it does not include the traditional Chinese medicine extract. The composition of other raw materials and the process steps and parameters of the preparation method are the same as those in Example 1.

[0078] Comparative Example 2

[0079] A compound feed for promoting the growth of broiler chickens, which is different from Example 1 only in that it does not include mulberry leaf powder. The composition of other raw materials and the process steps and parameters of the preparation method are the same as those in Example 1.

[0080] Comparative Example 3

[0081] A compound feed for promoting the growth of broiler chickens, which is different from Example 1 only in that it does not include xylo-oligosaccharide. The composition of other raw materials and the process steps and parameters of the preparation method are the same as those in Example 1.

[0082] Comparative Example 4

[0083] A compound feed for promoting the growth of broiler chickens, which is different from Example 1 only in that it does not include Bacillus licheniformis. The composition of other raw materials and the process steps and parameters of the preparation method are the same as those in Example 1.

[0084] Comparative Example 5

[0085] A compound feed for promoting the growth of broiler chickens is the same as Example 1.

[0086] A preparation method of a compound feed for promoting the growth of broiler chickens, which is different from Example 1 only in that the preparation of the traditional Chinese medicine extract only uses water as a solvent for extraction, specifically:

[0087] 1. Preparation of the traditional Chinese medicine extract:

[0088] (1) Crush the raw materials of the traditional Chinese medicine extract and then pass them through a sieve;

[0089] (2) Mix astragalus, hawthorn, tangerine peel, cypress seed, codonopsis, pulsatilla, liquorice, and pine needle powder, add water, boil, and simmer for 1-1.5 hours. After filtering, add water to the filter residue and repeat the above decocting process. Finally, combine the extracts, vacuum concentrate, and spray dry to obtain a Chinese medicine extract.

[0090] The other process steps and parameters are the same as those in Example 1.

[0091] Technical effect:

[0092] 200 healthy ross-308 broiler chickens at 1 day old were selected and raised normally until 7 days old. After weighing, they were randomly divided into 4 groups, with 5 replicates in each group and 10 chickens in each replicate. The compound feeds according to Examples 1-3 and Comparative Examples 1-5 were used as the basic diet for broiler chickens. The experimental chickens were raised in two stages of 0-21 days and 22-42 days. The total weight, total feed amount, residual feed amount and number of chickens in each group were weighed at 21 and 42 days of age, respectively. The average daily weight gain, average daily feed intake and feed consumption ratio of each broiler at 21 and 42 days of age were calculated, and the fat rate of the broilers was calculated by slaughtering the broilers. The test results are shown in Table 1:

[0093] Table 1

[0094]

[0095]

[0096] As can be seen from Table 1, the compound feed obtained in the embodiment of the present invention can effectively increase the average daily feed intake of broilers, promote the growth of broilers, improve their immunity, and thus reduce the mortality rate of broilers, so that the survival rate of broilers can reach almost 100%. In addition, the feed provided by the present invention can effectively reduce the fat rate of broilers and has the effect of improving meat quality.

[0097] The above are only preferred specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A compound feed for promoting the growth of broiler chickens, characterized in that, It includes raw materials in the following parts by weight: 45 - 55 parts of corn, 35 - 40 parts of soybean meal, 2 - 4 parts of yellow mealworm powder, 2 - 3 parts of bone meal, 6 - 8 parts of wheat middlings, 1 - 2 parts of medical stone, 2 - 3 parts of traditional Chinese medicine extract, 2 - 3 parts of mulberry leaf powder, 4 - 7 parts of apple peel extract, 0.2 - 0.5 parts of wolfberry extract, 10 - 20 parts of xylo-oligosaccharide, and 1 - 2 parts of compound probiotic preparation.

2. The compound feed for promoting the growth of broilers according to claim 1, characterized in that, The traditional Chinese medicine extract includes raw materials in the following parts by weight: 25 - 30 parts of astragalus membranaceus, 20 - 25 parts of hawthorn, 10 - 15 parts of dried tangerine peel, 0.5 - 1 part of codonopsis pilosula, 5 - 10 parts of pulsatilla chinensis, 5 - 8 parts of pine needle powder, 3 - 5 parts of liquorice root, 1 - 3 parts of semen platycladi.

3. The compound feed for promoting the growth of broilers according to claim 2, wherein, The preparation method of the traditional Chinese medicine extract includes the following steps: (1) Mix the astragalus membranaceus, hawthorn, dried tangerine peel, and semen platycladi, and then add an ethanol solution for ultrasonic extraction to obtain a first extract; (2) Mix the codonopsis pilosula, pulsatilla chinensis, liquorice root, and pine needle powder, and then decoct with water to obtain a second extract; (3) Combine the first extract and the second extract, and then conduct vacuum concentration and spray drying to obtain the traditional Chinese medicine extract.

4. The compound feed for promoting the growth of broilers according to claim 3, characterized in that, The concentration of the ethanol solution is 60%, and the addition amount is a material-liquid ratio of 1:(6 - 8).

5. A compound feed for promoting the growth of broilers according to claim 3, characterized in that, The ultrasonic extraction specifically includes the following steps: Under the conditions of an ultrasonic power of 200 - 500W and a temperature of 55 - 65°C, conduct ultrasonic extraction for 1 - 1.5h and then filter. Then, add the ethanol solution to the obtained filter residue again and repeat the above extraction process. After the extraction is completed, combine the extracts to obtain the first extract.

6. The compound feed for promoting the growth of broilers according to claim 3, characterized in that, The decoction with water specifically includes the following steps: Add water and bring to a boil, then simmer for 1 - 1.5h. After filtering, add water to the obtained filter residue again and repeat the above decoction process. Finally, combine the extracts to obtain the second extract.

7. The compound feed for promoting the growth of broilers according to claim 1, wherein, The composite probiotic preparation includes Bacillus subtilis ≥ 1×10 9 CFU / g, lactic acid bacteria ≥ 5×10 8 CFU / g, and Bacillus licheniformis ≥ 1×10 8 CFU / g.

8. The preparation method of a compound feed for promoting the growth of broiler chickens according to any one of claims 1-7, characterized in that, It includes the following steps: Crush the corn and soybean meal and conduct high-temperature instantaneous sterilization. Then, mix the corn, soybean meal, wheat middlings, bone meal, medical stone, and yellow mealworm powder evenly. Then, sequentially add the traditional Chinese medicine extract, mulberry leaf powder, apple peel extract, wolfberry extract, and xylo-oligosaccharide and continue to mix. Finally, add the compound probiotic preparation and mix evenly, and then conduct low-temperature granulation to obtain the compound feed for promoting the growth of broilers.

9. The preparation method of a compound feed for promoting the growth of broilers according to claim 8, characterized in that, The temperature of the low-temperature granulation is 30 - 65°C, and the particle size is 2 - 3mm.

10. The preparation method of a compound feed for promoting the growth of broiler chickens according to claim 8, wherein, The temperature of the high-temperature sterilization is 110 - 130°C, and the time is 12 - 17s.

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