Preparation method of feed for improving liver circulation of broiler chickens

Abstract

The invention provides a preparation method of a feed for improving liver circulation of broiler chickens, and relates to the technical field of chicken feeds, the feed for improving liver circulation of broiler chickens comprises the following components by weight: 350-450 parts of corn, 180-250 parts of soybean meal, 40-60 parts of grease, 20-30 parts of soybean fat phospholipid powder, 15-30 parts of limestone, and 4-8 parts of salt. According to the invention, the added corn, soybean oil, sunflower seed oil and palm oil enhance the energy density in the feed, and through the composition of different fatty acids, the fat processing ability of the liver is improved. The mixed use of the grease reduces the risk of nutrition imbalance possibly caused by single grease. Meanwhile, the introduction of the grease contributes to the absorption of fat-soluble vitamins, so that the utilization rates of the vitamins A, D3, E and K are improved, and the vitamins are crucial to the maintenance of the integrity of cell membranes and the anti-oxidation defense.

Description

Technical Field

[0001] The invention relates to the technical field of chicken feed, and in particular to a method for preparing feed for improving liver circulation of broiler chickens. Background Art

[0002] The broiler feed formula in the prior art mainly relies on corn-soybean meal-based diets, which, although providing basic energy and protein, are limited in promoting healthy fat metabolism and absorbing essential fat-soluble vitamins. The lack of sufficient oil components results in poor absorption efficiency of vitamins A, D, E, and K, which in turn affects the disease resistance and production performance of laying hens. In addition, insufficient addition of choline and bile acids, which are key to fat metabolism, may lead to liver dysfunction, specifically an increased incidence of fatty liver, which not only affects the health of the chickens, but also reduces the commercial value of eggs. Therefore, the deficiencies of the prior art in supporting liver health and optimizing fat metabolism directly affect production efficiency and product quality. Summary of the invention

[0003] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a method for preparing feed for improving liver circulation of broiler chickens.

[0004] In order to achieve the above object, the present invention adopts the following technical scheme: a feed for improving liver circulation of broiler chickens, wherein the feed for improving liver circulation of broiler chickens comprises the following components by weight:

[0005] 350-450 parts of corn, 180-250 parts of soybean meal, 40-60 parts of oil, 20-30 parts of soybean fat lecithin powder, 15-30 parts of limestone, 4-8 parts of salt, and 12-25 parts of vitamin mixture.

[0006] Preferably, the vitamin mixture is mixed by the following components, including the following components by weight: vitamin A: 3-5 parts, vitamin D3: 1-2 parts, vitamin E: 2-4 parts, vitamin K: 0.5-1 parts, vitamin B1: 0.5-1 parts, vitamin B12: 0.02-0.05 parts, folic acid: 0.2-0.5 parts.

[0007] Preferably, the oil is mixed by the following components, which include the following components by weight: 15-25 parts of soybean oil, 10-15 parts of corn oil, 5-10 parts of sunflower oil, and 10-15 parts of palm oil.

[0008] Preferably, the feed for improving liver circulation in broilers further comprises the following components by weight: 5-10 parts of choline and 1-3 parts of bile acid.

[0009] The present invention provides a method for preparing a feed for improving liver circulation of broiler chickens, comprising the following steps:

[0010] S1, raw material measurement, using an electronic scale to weigh corn, soybean meal, limestone, salt, vitamin mixture, choline and bile acid, and at the same time, weigh oil and soybean fat lecithin powder, ensuring that the weight of each raw material is within the specified range, and the error does not exceed ±0.5%. During the weighing process, the ambient temperature is controlled at 20-25°C and the humidity is maintained at 50-60% to prevent the raw materials from being damp or oxidized, so as to obtain accurately weighed raw materials;

[0011] S2, pre-treating the accurately weighed raw materials, screening the raw materials through a 80-100 mesh screen to remove impurities and foreign matter, using a magnetic separation device with a magnetic field strength of 8000-10000 Gauss to remove metal debris in the raw materials, and deacidifying and dehydrating the oil and soybean fat lecithin powder at a temperature of 60-80° C. for 30-60 minutes to ensure its purity and stability, thereby obtaining a pre-treated raw material;

[0012] S3, magnetizing the water used for wet mixing, treating the water needed in the pretreated raw materials through a magnetizing device, setting the magnetic field strength at 3000-5000 Gauss, the water flow rate at 1-2 m / s, and the magnetizing treatment time at 30-60 minutes, so as to change the molecular structure of the water, improve its solubility and biological activity, and maintain the water temperature at 15-25° C. to prevent the growth of microorganisms, and obtain magnetized water;

[0013] S4, mixing the pretreated raw materials with the magnetized water, using a double-shaft paddle mixer, setting the speed at 200-400 rpm, mixing for 5-10 minutes, ensuring that the coefficient of variation of material uniformity is less than 5%, and controlling the temperature at 20-30° C. during the mixing process to avoid thermal decomposition of nutrients and obtain a uniform mixture;

[0014] S5, adding microbial culture medium, glucose, peptone and yeast extract, and inorganic salts to the uniform mixture, stirring with a stirrer at a speed of 150-300 rpm for 5-15 minutes to fully dissolve the culture medium and evenly distribute it in the mixture, adjusting the pH value to 6.5-7.5, and maintaining the temperature at 25-35° C. to create a suitable environment for microbial growth, and obtaining a mixture with the culture medium added;

[0015] S6, bioconverting the mixture to which the culture medium is added, adding saccharomyces cerevisiae or lactic acid bacteria, with an inoculation amount of 0.5-1%, using a fermenter, controlling the temperature at 30-35° C., maintaining the pH value at 6.0-7.0, stirring at a speed of 100-200 rpm, and a ventilation volume of 0.5-1.0 volume of air / volume of culture solution / minute, and fermenting for 12-24 hours, so as to convert non-protein nitrogen into microbial protein, thereby increasing the protein content and digestibility of the feed, and obtaining a bioconverted mixture;

[0016] S7, performing sono-photocatalytic pretreatment on the bioconverted mixed material, adjusting the humidity of the mixed material to 25-30%, maintaining the temperature at 25-30° C., using a conditioner, stirring at a speed of 50-100 rpm for 5-10 minutes to ensure that the humidity and temperature are evenly distributed, and obtaining a mixed material with suitable humidity and temperature;

[0017] S8, subjecting the mixed material with suitable humidity and temperature to sono-photocatalytic treatment, using a sono-photocatalytic reactor, applying ultrasonic waves with a frequency of 20-40 kHz and a power density of 0.5-1.5 W / cm 2 At the same time, the visible light with a wavelength of 400-700nm and a light intensity of 1000-5000lux is irradiated for 10-20 minutes. The synergistic effect of sound and light can change the molecular structure of nutrients, enhance biological activity, and obtain a mixture treated with sound and light catalysis.

[0018] S9, mixing the mixture treated with sono-photocatalysis with the preheated oil and the magnetized water, preheating the oil and soybean fat lecithin powder to 50-60° C., and then adding them to the mixture, mixing with a high shear mixer to obtain a wet mixture.

[0019] S10, the wet mixture is granulated into granules by a granulator, a ring die granulator is used, the die hole diameter is 2-4 mm, the pressure of the roller is 50-100 kgf / cm2, the granulation temperature is controlled at 60-80°C, and the material stays in the granulator for 30-60 seconds to obtain feed granules;

[0020] S11, pre-drying the feed pellets using a fluidized bed dryer, with the temperature set at 40-50° C., the air flow velocity at 1-2 m / s, and the drying time at 10-20 minutes, so that the moisture content of the pellets is reduced to 18-20%, thereby obtaining pre-dried feed pellets;

[0021] S12, subjecting the pre-dried feed particles to low-temperature spray drying, using a spray drying tower, with an air inlet temperature of 60-80°C, an air outlet temperature of 40-60°C, an atomization pressure of 5-10 MPa, and a drying time of 15-30 minutes, to reduce the moisture content to 10-12%. Low-temperature drying can retain heat-sensitive nutrients and prevent decomposition or inactivation, thereby obtaining dried feed particles.

[0022] S13, cooling and screening the dried feed particles, using a cooler to reduce the temperature of the particles to room temperature of 20-25°C, and then passing through a vibrating screen with a mesh size of 2 mm to screen out fine powder less than 2 mm and oversized particles greater than 4 mm. The particle size that meets the requirements is between 2-4 mm, thereby obtaining feed particles that meet the size requirements;

[0023] S14, conducting quality inspection on the feed pellets that meet the size requirements, conducting nutrient analysis, including determination of crude protein, crude fat, crude fiber, minerals and vitamins, conducting microbiological inspection to detect whether Escherichia coli and Salmonella meet the standards, and also testing whether the moisture content is 10-12%, to obtain qualified feed products;

[0024] S15, packing the qualified feed products in moisture-proof and anti-oxidation composite bags or paper bags, with a single bag weight of 25-50 kg, using an automatic packaging machine to ensure tight sealing to prevent moisture and oxidation. After packaging, the products are stored in a dry, ventilated, light-proof warehouse at an ambient temperature of 0-25°C and a humidity of no more than 75%, ready for sale.

[0025] Preferably, in step S9, the high shear mixer has a mixing speed of 500-1000 rpm, a mixing time of 5-15 minutes, and during the mixing process, the temperature is maintained at 40-50° C., and the humidity reaches 30-35%.

[0026] 1. Compared with the prior art, the feed of the present invention adds a variety of oils and vitamin mixtures, which promotes the optimization of liver health and fat metabolism. First, the added corn, soybean oil, sunflower oil and palm oil enhance the energy density in the feed, and improve the liver's ability to handle fat through their different fatty acid compositions. The mixed use of this oil reduces the risk of nutritional imbalance that may be caused by a single oil. At the same time, the introduction of these oils helps the absorption of fat-soluble vitamins, thereby improving the utilization rate of vitamins A, D3, E and K, which are essential for maintaining the integrity of cell membranes and antioxidant defense. The appropriate addition of vitamins B1, B12 and folic acid further promotes carboxylation reactions and amino acid metabolism, and contributes to the balance of fat synthesis and decomposition. In addition, by adding soybean fat lecithin powder and choline, the liver's ability to transport and metabolize fat is enhanced, effectively preventing the formation of fatty liver. The comprehensive optimization of this feed not only improves the health of the liver, but also improves the overall quality of eggs.

[0027] 2. Compared with the prior art, the use of magnetized water and microbial fermentation in the bioconversion process in the present invention brings higher biological activity and digestibility to the feed, which means that animals can absorb and utilize the nutrients in the feed more effectively. The application of sono-photocatalytic technology changes the structure of nutrients by physical means, which not only enhances the biological activity of the feed, but also reduces the nutritional loss caused by traditional processing technology.

[0028] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 The present invention provides a preparation step diagram of a method for preparing feed for improving liver circulation in broilers. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] Example 1, a feed for improving liver circulation in broilers, the feed for improving liver circulation in broilers comprises the following components by weight: 450 parts of corn, 250 parts of soybean meal, 60 parts of oil, 30 parts of soybean fat lecithin powder, 30 parts of limestone, 8 parts of salt, and 25 parts of vitamin mixture.

[0033] In this embodiment, the vitamin mixture is mixed by the following components, which include the following components by weight: vitamin A: 5 parts, vitamin D3: 2 parts, vitamin E: 4 parts, vitamin K: 1 part, vitamin B1: 1 part, vitamin B12: 0.05 parts, and folic acid: 0.5 parts.

[0034] In this embodiment, the oil is mixed by the following components, which include the following components by weight: 25 parts of soybean oil, 15 parts of corn oil, 10 parts of sunflower oil, and 15 parts of palm oil.

[0035] In this embodiment, the feed for improving liver circulation of broiler chickens further includes the following components by weight: 10 parts of choline and 3 parts of bile acid.

[0036] The present invention provides a method for preparing a feed for improving liver circulation of broiler chickens, comprising the following steps:

[0037] S1, raw material measurement, using an electronic scale to weigh corn, soybean meal, limestone, salt, vitamin mixture, choline and bile acid, and at the same time, weigh oil and soybean fat lecithin powder, ensuring that the weight of each raw material is within the specified range, and the error does not exceed ±0.5%. During the weighing process, the ambient temperature is controlled at 25°C and the humidity is maintained at 60% to prevent the raw materials from being damp or oxidized, and to obtain accurately weighed raw materials;

[0038] S2, pre-treating the accurately weighed raw materials, screening the raw materials through a 100-mesh screen to remove impurities and foreign matter, using a magnetic separation device with a magnetic field strength of 10,000 gauss to remove metal debris in the raw materials, and deacidifying and dehydrating the oil and soybean fat lecithin powder at a temperature of 80° C. for 60 minutes to ensure their purity and stability, thereby obtaining a pre-treated raw material;

[0039] Specifically, in the raw material metering step, accurate batching operation first relies on the use of electronic scales to ensure that the weight accuracy of various raw materials reaches the requirement of ±0.5%. In this way, the stability of subsequent product quality and the uniformity of nutritional components can be ensured. Strict control of ambient temperature and humidity is to avoid quality degradation of raw materials due to moisture or oxidation. A temperature of 25°C and a relative humidity of 60% provide an ideal environment for raw materials to maintain their optimal state. Accurate metering of corn, soybean meal, limestone, salt, and additives such as vitamin mixtures, choline and bile acid lay a solid foundation for the basic nutritional components of the feed. The weighing of oils and soybean fat lecithin powder is also strict. These two ingredients are particularly important for regulating the liver function of broilers, and their accurate ratio directly affects the effect of the final feed.

[0040] In the raw material pretreatment step, the raw materials are screened through a 100-mesh screen to effectively remove impurities and foreign matter, ensuring the purity and safety of the feed. The use of magnetic separation equipment further removes any metal fragments from the raw materials. The magnetic field strength of 10,000 Gauss ensures the high efficiency and thoroughness of the magnetic separation process, reducing any potential risk of metal contamination. For oils and soybean fat lecithin powder, deacidification and dehydration treatment at 80°C not only ensures the stability and purity of these oil components, but also optimizes their bioavailability. This step ensures that all raw materials are in the best condition and provides high-quality basic materials for subsequent mixing and feed making processes. The pretreated raw materials have higher safety and biological efficiency, and play an important role in improving broiler liver circulation.

[0041] S3, magnetizing the water used for wet mixing, and treating the water needed in the pretreated raw materials through a magnetizing device, with the magnetic field strength set at 5000 Gauss, the water flow rate at 2 m / s, and the magnetizing treatment time at 60 minutes, so as to change the molecular structure of the water, improve its solubility and biological activity, and keep the water temperature at 25°C to prevent the growth of microorganisms, and obtain magnetized water;

[0042] S4, mixing the pretreated raw materials with the magnetized water, using a double-shaft paddle mixer, setting the speed at 400 rpm, and mixing for 10 minutes, ensuring that the coefficient of variation of the material uniformity is less than 5%. During the mixing process, the temperature is controlled at 30° C. to avoid thermal decomposition of the nutrients and obtain a uniform mixture;

[0043] Specifically, in the magnetized water treatment step, the pretreated water is transported to a specific magnetization device for treatment. This equipment has the ability to generate a magnetic field strength of 5000 Gauss to ensure that the water is affected by a sufficiently strong magnetic field when passing through the equipment. The water flow rate is controlled at 2 meters per second, and the interaction time with the magnetic field is 60 minutes. This setting is designed to change the molecular structure of water to the greatest extent. The changes in the molecular structure of water are mainly manifested in enhancing the hydrogen bonding between water molecules, thereby improving the solubility and biological activity of water. This change helps water to better dissolve and transport nutrients in feed, thereby improving its absorption efficiency in broilers. In addition, during the entire magnetization process, the water temperature is maintained at 25°C. This temperature setting can effectively prevent the growth of microorganisms induced by increased temperature and ensure the safety and purity of water quality.

[0044] In the step of mixing raw materials with magnetized water, the magnetized water is mixed with various pre-treated raw materials in a twin-shaft paddle mixer. The speed of the mixer is set to 400 rpm and the mixing time lasts for 10 minutes. This combination of speed and time is designed to ensure that the various raw materials can be mixed evenly, and the coefficient of variation of the uniformity of the mixed material is less than 5%, which indicates that the mixing effect is highly uniform, which can effectively prevent the formation of any nutritional hotspots and ensure the consistency of nutrients in each feed. In addition, the temperature during the mixing process is controlled at 30°C. Such a temperature setting can avoid the thermal decomposition of nutrients such as vitamins and proteins caused by excessive temperature, thereby maintaining the nutritional value of the feed without loss. Through this series of delicate operations, the final mixture has excellent physical and chemical properties, providing balanced nutritional support for broilers and promoting their healthy growth.

[0045] S5, adding microbial culture medium, glucose, peptone and yeast extract, and inorganic salts to the uniform mixture, stirring with a stirrer at a speed of 300 rpm for 15 minutes to fully dissolve the culture medium and evenly distribute it in the mixture, adjusting the pH value to 7.5 and maintaining the temperature at 35° C. to create a suitable environment for microbial growth, and obtaining a mixture with the culture medium added;

[0046] S6, bioconverting the mixture to which the culture medium has been added, adding saccharomyces cerevisiae or lactic acid bacteria, with an inoculation amount of 1%, using a fermentation tank, controlling the temperature at 35° C., maintaining the pH value at 7.0, stirring at 200 rpm, and aerating 1.0 volume of air / volume of culture medium / minute, and fermenting for 24 hours, so as to convert non-protein nitrogen into microbial protein, thereby increasing the protein content and digestibility of the feed, and obtaining a bioconverted mixture;

[0047] Specifically, in the step of adding microbial culture medium, specific microbial nutrients, including glucose, peptone and yeast extract and necessary inorganic salts, are first added to the uniformly mixed feed. Use an efficient agitator to stir at a speed of 300 rpm for 15 minutes. This stirring process ensures that all added culture medium components are fully dissolved and evenly distributed in the mixture. By adjusting the pH value to 7.5 and maintaining the temperature at 35°C during stirring, the most suitable environment for microbial growth is created. The effect of this step is to provide the necessary nutritional basis for the subsequent microbial fermentation process, so that the microorganisms can grow effectively and perform their functions, transform the non-protein nitrogen in the feed, and enhance the nutritional value of the feed.

[0048] In the bioconversion step, the mixture with the addition of culture medium is further treated to promote the growth and fermentation of microorganisms. By adding Saccharomyces cerevisiae or lactic acid bacteria, the inoculation amount is controlled to 1% of the total volume, using specially designed fermenters. During the fermentation process, the temperature is strictly controlled at 35°C and the pH value is maintained at 7.0, both of which are ideal conditions for microbial growth and activity. The stirring speed is set at 200 rpm and the ventilation is set at 1.0 volume of air / volume of culture medium / minute. This setting ensures sufficient oxygen supply during the fermentation process, which helps to maintain the metabolic activity of the microorganisms. The entire fermentation time is 24 hours, which is enough for the non-protein nitrogen in the feed to be effectively converted into microbial protein. This process not only increases the protein content of the feed, but also improves its digestibility, thereby enhancing the nutritional efficiency of the feed and the growth performance of broilers. Through these refined operations, the high efficiency of the bioconversion process and the high quality of the final product are ensured.

[0049] S7, performing sono-photocatalytic pretreatment on the bioconverted mixture, adjusting the humidity of the mixture to 30%, maintaining the temperature at 30° C., using a conditioner, stirring at a speed of 100 rpm for 10 minutes to ensure that the humidity and temperature are evenly distributed, and obtaining a mixture with suitable humidity and temperature;

[0050] S8, subjecting the mixed material with suitable humidity and temperature to sono-photocatalytic treatment, using a sono-photocatalytic reactor, applying ultrasonic waves with a frequency of 40 kHz and a power density of 1.5 W / cm 2 At the same time, the visible light with a wavelength of 700nm and a light intensity of 5000lux was irradiated for 20 minutes. The synergistic effect of sound and light can change the molecular structure of nutrients, enhance biological activity, and obtain a mixture treated with sound and light catalysis.

[0051] Specifically, in the sono-photocatalytic pre-treatment step, the humidity of the mixture is first adjusted to 30% to ensure that in the subsequent treatment, the humidity reaches the level most suitable for the sono-photocatalytic effect. The temperature is controlled at 30°C, which helps to maintain the biologically active components in the mixture in a relatively stable state. Use a conditioner to stir at a speed of 100 rpm for 10 minutes. This process ensures that the humidity and temperature are evenly distributed throughout the mixture. Uniform temperature and humidity are key factors in achieving effective sono-photocatalysis, because these parameters directly affect the stability of the molecular structure in the mixture and its responsiveness to sono-photocatalytic energy. After being treated in this way, every part of the mixture has reached the ideal state for sono-photocatalysis, laying the foundation for the next step of efficient catalytic treatment.

[0052] In the sono-photocatalytic treatment step, the mixed material with suitable humidity and temperature is treated using a sono-photocatalytic reactor. This equipment applies ultrasound with a frequency of 40kHz and a power density of 1.5W / cm 2 , while irradiating visible light with a wavelength of 700nm and a light intensity of 5000lux. This composite energy acts on the mixture for 20 minutes. The mechanism of sono-photocatalysis can change the molecular structure of nutrients in the mixture, especially the conformation of proteins and other macromolecules, through the synergistic effect of micro-vibrations generated by ultrasound and radiation of light energy. This structural change helps to enhance the biological activity of these molecules, such as increasing the activity of enzymes or improving the bioavailability of nutrients. Ultimately, the mixture treated with sono-photocatalysis is optimized at the molecular level, increasing its bioactive components that are beneficial to the growth and health of broilers, thereby improving the functionality and benefits of the entire feed product. Through these detailed steps, every link in the processing process is ensured to be precisely controlled to maximize the effect of sono-photocatalysis.

[0053] S9, mixing the mixture treated with sono-photocatalysis with the preheated oil and magnetized water, preheating the oil and soybean fat lecithin powder to 60° C., and then adding them to the mixture, mixing with a high shear mixer to obtain a wet mixture.

[0054] S10, the wet mixture is made into granules by a granulator, a ring die granulator is used, the die hole diameter is 4 mm, the pressure of the roller is 100 kgf / cm2, the granulation temperature is controlled at 80°C, and the material stays in the granulator for 60 seconds to obtain feed granules;

[0055] Specifically, in the step of mixing oil and magnetized water, the oil and soybean fat lecithin powder are first preheated to 60°C in order to reduce the viscosity of these ingredients so as to facilitate uniform mixing with the mixture after sono-photocatalytic treatment. Using a high shear mixer for mixing can ensure that the oil and water phase and other dry powdered ingredients are completely fused. The high shear function of the mixer lies in its powerful stirring ability, which can generate sufficient shear force to break the interfacial tension between oil and water and realize an efficient emulsification process. The completion of this step not only increases the uniformity of the mixture, but also optimizes the taste and digestion and absorption rate of the mixture through proper dispersion of oil and water. In addition, keeping the temperature and humidity of the mixture at a suitable level is conducive to subsequent processing, while maintaining the stability of the added oil and the effectiveness of the active ingredients.

[0056] In the step of the pelleting process, a ring die pelletizer is used to convert the wet mixture into a uniform granule form. The die hole diameter of the pelletizer is set to 4 mm, and the roller pressure is set to 100 kgf / cm2. Such parameter configuration ensures the density and consistency of the pellets. The temperature during the pelleting process is controlled at 80°C, which not only helps the mixture to bond during the molding process, but also inactivates possible microorganisms to a certain extent, ensuring the hygiene and safety of the feed. The residence time of the material in the pelletizer is 60 seconds, which is long enough to ensure that each particle can be fully heat treated and pressurized, thus forming feed pellets with uniform structure and moderate texture. These granular feeds have better storage and usability, are easy to transport and feed, and can reduce dust generation during use and improve the use environment. Through the meticulous execution of these operations, the high quality of the feed and good production efficiency are ensured.

[0057] S11, pre-drying the feed pellets using a fluidized bed dryer with the temperature set at 50° C., the air flow velocity at 2 m / s, and the drying time at 20 minutes, so that the moisture content of the pellets is reduced to 20%, thereby obtaining pre-dried feed pellets;

[0058] S12, subjecting the pre-dried feed particles to low-temperature spray drying, using a spray drying tower, with an air inlet temperature of 80°C, an air outlet temperature of 60°C, an atomization pressure of 10 MPa, and a drying time of 30 minutes, to reduce the moisture content to 12%. Low-temperature drying can retain heat-sensitive nutrients and prevent decomposition or inactivation, thereby obtaining dried feed particles.

[0059] In the pre-drying step, the feed pellets are placed in a fluidized bed dryer, which uses efficient airflow to transfer heat and increase dynamic fluidity between particles. The temperature in the dryer is set at 50°C and the airflow velocity is maintained at 2 m / s. Under these conditions, the moisture in the pellets can evaporate quickly without damaging their structure. The entire drying process lasts 20 minutes, which is enough time to reduce the moisture content in the feed pellets from the original level to 20%. In this way, the pellets are more stable in subsequent processing and reduce the risk of mold or other microbial contamination caused by excessive moisture during storage. In addition, this step ensures that the physical properties of the pellets remain unchanged before the next higher temperature drying process, laying the foundation for obtaining a high-quality final product.

[0060] In the low-temperature spray drying step, the pre-dried feed pellets are further processed to achieve the final desired degree of dryness. The spray drying tower used is set with an inlet air temperature of 80°C and an outlet air temperature of 60°C. Such temperature settings ensure that heat-sensitive nutrients such as vitamins and certain enzymes will not be decomposed or inactivated by high temperatures during the drying process. The atomization pressure is set to 10 MPa. This pressure level helps to quickly atomize the wet pellets into tiny droplets and improve drying efficiency. The drying time is controlled within 30 minutes. The precise control of time and temperature is to ensure that the moisture content is evenly reduced to 12%, which is suitable for long-term storage of feed and ensure the stability of nutrients. This process not only maximizes the nutritional value of the pellets, but also improves their competitiveness and applicability in the market. Through these precisely controlled drying steps, the dried feed pellets have excellent texture and extended shelf life, meeting the requirements of high-standard feed products.

[0061] S13, cooling and screening the dried feed particles, using a cooler to reduce the particle temperature to room temperature 25°C, and then passing through a vibrating screen with a mesh size of 2 mm to screen out fine powder less than 2 mm and oversized particles greater than 4 mm. The particle size that meets the requirements is between 4 mm, thereby obtaining feed particles that meet the size requirements;

[0062] S14, conduct quality inspection on feed pellets that meet the size requirements, conduct nutritional analysis, including the determination of crude protein, crude fat, crude fiber, minerals and vitamins, conduct microbiological inspection to test whether E. coli and Salmonella meet the standards, and also test whether the moisture content is within 12%, and obtain qualified feed products;

[0063] S15, package the qualified feed products in moisture-proof and anti-oxidation composite bags or paper bags. The weight of a single bag is 50 kg. Use an automatic packaging machine to ensure that the bag is tightly sealed to prevent moisture and oxidation. After packaging, store it in a dry, ventilated, light-proof warehouse with an ambient temperature of 25°C and a humidity not exceeding 75%, ready for sale.

[0064] In this embodiment, in step S9, the high shear mixer has a mixing speed of 1000 rpm and a mixing time of 15 minutes. During the mixing process, the temperature is maintained at 50° C. and the humidity reaches 35%.

[0065] Example 2, a feed for improving liver circulation of broiler chickens, the feed for improving liver circulation of broiler chickens comprises the following components by weight: 400 parts of corn, 200 parts of soybean meal, 50 parts of oil, 25 parts of soybean fat lecithin powder, 20 parts of limestone, 8 parts of salt, and 25 parts of vitamin mixture.

[0066] In this embodiment, the vitamin mixture is mixed by the following components, which include the following components by weight: vitamin A: 5 parts, vitamin D3: 2 parts, vitamin E: 4 parts, vitamin K: 1 part, vitamin B1: 1 part, vitamin B12: 0.05 parts, and folic acid: 0.5 parts.

[0067] In this embodiment, the oil is mixed by the following components, which include the following components by weight: 25 parts of soybean oil, 15 parts of corn oil, 10 parts of sunflower oil, and 15 parts of palm oil.

[0068] In this embodiment, the feed for improving liver circulation of broiler chickens further includes the following components by weight: 10 parts of choline and 3 parts of bile acid.

[0069] The present invention provides a method for preparing a feed for improving liver circulation of broiler chickens, comprising the following steps:

[0070] S1, raw material measurement, using an electronic scale to weigh corn, soybean meal, limestone, salt, vitamin mixture, choline and bile acid, and at the same time, weigh oil and soybean fat lecithin powder, ensuring that the weight of each raw material is within the specified range, and the error does not exceed ±0.5%. During the weighing process, the ambient temperature is controlled at 20°C and the humidity is maintained at 60% to prevent the raw materials from being damp or oxidized, so as to obtain accurately weighed raw materials;

[0071] S2, pre-treating the accurately weighed raw materials, screening the raw materials through a 80-mesh screen to remove impurities and foreign matter, using a magnetic separation device with a magnetic field strength of 8000 Gauss to remove metal debris in the raw materials, and deacidifying and dehydrating the oil and soybean fat lecithin powder at a temperature of 70° C. for 40 minutes to ensure their purity and stability, thereby obtaining a pre-treated raw material;

[0072] S3, magnetizing the water used for wet mixing, and treating the water needed in the pretreated raw materials through a magnetizing device, with the magnetic field strength set at 5000 Gauss, the water flow rate at 2 m / s, and the magnetizing treatment time at 60 minutes, so as to change the molecular structure of the water, improve its solubility and biological activity, and keep the water temperature at 25°C to prevent the growth of microorganisms, and obtain magnetized water;

[0073] S4, mixing the pretreated raw materials with the magnetized water, using a double-shaft paddle mixer, setting the speed at 400 rpm, and mixing for 10 minutes, ensuring that the coefficient of variation of the material uniformity is less than 5%. During the mixing process, the temperature is controlled at 30° C. to avoid thermal decomposition of the nutrients and obtain a uniform mixture;

[0074] S5, adding microbial culture medium, glucose, peptone and yeast extract, and inorganic salts to the uniform mixture, stirring with a stirrer at a speed of 300 rpm for 15 minutes to fully dissolve the culture medium and evenly distribute it in the mixture, adjusting the pH value to 7, and maintaining the temperature at 35° C. to create a suitable environment for microbial growth, thereby obtaining a mixture with the culture medium added;

[0075] S6, bioconverting the mixture to which the culture medium has been added, adding saccharomyces cerevisiae or lactic acid bacteria, with an inoculation amount of 1%, using a fermentation tank, controlling the temperature at 35° C., maintaining the pH value at 7.0, stirring at 200 rpm, and aerating 1.0 volume of air / volume of culture medium / minute, and fermenting for 24 hours, so as to convert non-protein nitrogen into microbial protein, thereby increasing the protein content and digestibility of the feed, and obtaining a bioconverted mixture;

[0076] S7, performing sono-photocatalytic pretreatment on the bioconverted mixture, adjusting the humidity of the mixture to 30%, maintaining the temperature at 30° C., using a conditioner, stirring at a speed of 100 rpm for 10 minutes to ensure that the humidity and temperature are evenly distributed, and obtaining a mixture with suitable humidity and temperature;

[0077] S8, subjecting the mixed material with suitable humidity and temperature to sono-photocatalytic treatment, using a sono-photocatalytic reactor, applying ultrasonic waves with a frequency of 40 kHz and a power density of 1.5 W / cm 2 At the same time, the visible light with a wavelength of 600nm and a light intensity of 3500lux was irradiated for 20 minutes. The synergistic effect of sound and light can change the molecular structure of nutrients, enhance biological activity, and obtain a mixture treated with sound and light catalysis.

[0078] S9, mixing the mixture treated with sono-photocatalysis with the preheated oil and magnetized water, preheating the oil and soybean fat lecithin powder to 60° C., and then adding them to the mixture, mixing with a high shear mixer to obtain a wet mixture.

[0079] S10, the wet mixture is made into granules by a granulator, a ring die granulator is used, the die hole diameter is 4 mm, the pressure of the roller is 100 kgf / cm2, the granulation temperature is controlled at 80°C, and the material stays in the granulator for 60 seconds to obtain feed granules;

[0080] S11, pre-drying the feed pellets using a fluidized bed dryer with the temperature set at 50° C., the air flow velocity at 2 m / s, and the drying time at 20 minutes, so that the moisture content of the pellets is reduced to 20%, thereby obtaining pre-dried feed pellets;

[0081] S12, subjecting the pre-dried feed particles to low-temperature spray drying, using a spray drying tower, with an air inlet temperature of 80°C, an air outlet temperature of 60°C, an atomization pressure of 10 MPa, and a drying time of 30 minutes, to reduce the moisture content to 12%. Low-temperature drying can retain heat-sensitive nutrients and prevent decomposition or inactivation, thereby obtaining dried feed particles.

[0082] S13, cooling and screening the dried feed particles, using a cooler to reduce the particle temperature to room temperature 25°C, and then passing through a vibrating screen with a mesh size of 2 mm to screen out fine powder less than 2 mm and oversized particles greater than 4 mm. The particle size that meets the requirements is between 4 mm, thereby obtaining feed particles that meet the size requirements;

[0083] S14, conduct quality inspection on feed pellets that meet the size requirements, conduct nutritional analysis, including the determination of crude protein, crude fat, crude fiber, minerals and vitamins, conduct microbiological inspection to test whether E. coli and Salmonella meet the standards, and also test whether the moisture content is within 12%, and obtain qualified feed products;

[0084] S15, package the qualified feed products in moisture-proof and anti-oxidation composite bags or paper bags. The weight of a single bag is 50 kg. Use an automatic packaging machine to ensure that the bag is tightly sealed to prevent moisture and oxidation. After packaging, store it in a dry, ventilated, light-proof warehouse with an ambient temperature of 25°C and a humidity not exceeding 75%, ready for sale.

[0085] In this embodiment, in step S9, the high shear mixer has a mixing speed of 1000 rpm and a mixing time of 15 minutes. During the mixing process, the temperature is maintained at 50° C. and the humidity reaches 35%.

[0086] Experimental methods:

[0087] Method for determining liver index: The experimental animals were healthy 1-day-old broilers, randomly divided into three groups: comparative example 1, example 1 and example 2, with 50 broilers in each group, and fed with corresponding feeds respectively. The feeding period was 42 days, and the feeding environment temperature was maintained at 22-26°C, the relative humidity was 60-70%, and the broilers were free to eat and drink water. After the feeding was completed, 10 broilers in each group were randomly selected, fasted for 12 hours, weighed, and then slaughtered, the liver was taken out, and the liver weight was weighed using an electronic balance with an accuracy of 0.01g. The liver index was calculated according to the formula: liver index (%) = (liver weight / body weight) × 100%.

[0088] Method for determination of serum ALT level: On the morning of the 42nd day of the feeding cycle, 10 broilers in each group were randomly selected, and 2 ml of blood was collected in a vacuum blood collection tube without anticoagulant by wing vein blood sampling method. After standing at room temperature for 30 minutes, the blood was centrifuged for 10 minutes (speed 3000 rpm) to separate serum. The serum ALT level was determined using an automatic biochemical analyzer and an alanine aminotransferase (ALT) assay kit according to the kit instructions at a detection wavelength of 340 nm and a reaction temperature of 37°C.

[0089] Method for determining the survival rate: During the feeding period, the number of deaths of broilers in each group was recorded daily, and the number of survivors was calculated. The survival rate was calculated according to the formula: survival rate (%) = (number of survivors at the end of the feeding period / initial number) × 100%.

[0090] Method for determining average daily weight gain: During the feeding period, weigh the weight of each group of broilers regularly every week (7th, 14th, 21st, 28th, 35th, 42nd day) using an electronic scale with an accuracy of 0.1g. The average daily weight gain is calculated according to the formula: average daily weight gain (g / day) = (average weight at the end of the period - average weight at the beginning of the period) / number of days of feeding.

[0091] Method for determining feed conversion rate: During the feeding period, record the total feed consumption of each group and weigh the feed weight (accuracy 0.1kg). Record the total weight gain of broilers. Feed conversion rate is calculated according to the formula: Feed conversion rate = feed consumption (kg) / body weight gain (kg).

[0092] The finished feeds prepared in Examples 1-2 were tested, wherein Comparative Example 1 was a commercially available product, and the test results were as follows:

[0093] Table 1 Performance test data

[0094] Performance Indicators Comparative Example 1 Example 1 Example 2 Liver index (%) 2.5 2.0 2.0 Serum ALT level (U / L) 50 35 30 Survival rate (%) 90 95 96 Average daily weight gain (g / day) 50 55 58 Feed conversion rate 2.0 1.8 1.7

[0095] As can be seen from Table 1, Examples 1-2 have obvious advantages over Comparative Example 1. The feeds of Examples 1-2 reduce the liver index of broilers, improve liver function indicators, increase survival rate, increase average daily weight gain, and reduce feed conversion rate. These results show that the feeds of Examples 1-2 are superior to Comparative Example 1 in improving liver circulation, enhancing growth performance, and improving feed utilization efficiency of broilers.

Claims

1. A feed for improving liver circulation in broiler chickens, characterized in that: The feed for improving broiler liver circulation comprises the following components by weight: 350-450 parts of corn, 180-250 parts of soybean meal, 40-60 parts of oil, 20-30 parts of soybean fat lecithin powder, 15-30 parts of limestone, 4-8 parts of salt, and 12-25 parts of vitamin mixture.

2. The feed for improving liver circulation in broilers according to claim 1, characterized in that: The vitamin mixture is mixed by the following components, and includes the following components by weight: vitamin A: 3-5 parts, vitamin D3: 1-2 parts, vitamin E: 2-4 parts, vitamin K: 0.5-1 parts, vitamin B1: 0.5-1 parts, vitamin B12: 0.02-0.05 parts, and folic acid: 0.2-0.5 parts.

3. The feed for improving liver circulation in broiler chickens according to claim 1, characterized in that: The oil is mixed by the following components, which include the following components by weight: 15-25 parts of soybean oil, 10-15 parts of corn oil, 5-10 parts of sunflower oil and 10-15 parts of palm oil.

4. The feed for improving liver circulation in broilers according to claim 1, characterized in that: The feed for improving liver circulation of broiler chickens also includes the following components by weight: 5-10 parts of choline and 1-3 parts of bile acid.

5. A method for preparing a feed for improving liver circulation in broiler chickens, characterized in that: The following steps are involved: S1, raw material measurement, using an electronic scale to weigh corn, soybean meal, limestone, salt, vitamin mixture, choline and bile acid, and at the same time, weigh oil and soybean fat lecithin powder, ensuring that the weight of each raw material is within the specified range, and the error does not exceed ±0.5%. During the weighing process, the ambient temperature is controlled at 20-25°C and the humidity is maintained at 50-60% to prevent the raw materials from being damp or oxidized, so as to obtain accurately weighed raw materials; S2, pre-treating the accurately weighed raw materials, screening the raw materials through a 80-100 mesh screen to remove impurities and foreign matter, using a magnetic separation device with a magnetic field strength of 8000-10000 Gauss to remove metal debris in the raw materials, and deacidifying and dehydrating the oil and soybean fat lecithin powder at a temperature of 60-80° C. for 30-60 minutes to ensure its purity and stability, thereby obtaining a pre-treated raw material; S3, magnetizing the water used for wet mixing, treating the water needed in the pretreated raw materials through a magnetizing device, setting the magnetic field strength at 3000-5000 Gauss, the water flow rate at 1-2 m / s, and the magnetizing treatment time at 30-60 minutes, so as to change the molecular structure of the water, improve its solubility and biological activity, and maintain the water temperature at 15-25° C. to prevent the growth of microorganisms, and obtain magnetized water; S4, mixing the pretreated raw materials with the magnetized water, using a double-shaft paddle mixer, setting the speed at 200-400 rpm, mixing for 5-10 minutes, ensuring that the coefficient of variation of material uniformity is less than 5%, and controlling the temperature at 20-30° C. during the mixing process to avoid thermal decomposition of nutrients and obtain a uniform mixture; S5, adding microbial culture medium, glucose, peptone and yeast extract, and inorganic salts to the uniform mixture, stirring with a stirrer at a speed of 150-300 rpm for 5-15 minutes to fully dissolve the culture medium and evenly distribute it in the mixture, adjusting the pH value to 6.5-7.5, and maintaining the temperature at 25-35° C. to create a suitable environment for microbial growth, and obtaining a mixture with the culture medium added; S6, bioconverting the mixture to which the culture medium is added, adding saccharomyces cerevisiae or lactic acid bacteria, with an inoculation amount of 0.5-1%, using a fermenter, controlling the temperature at 30-35° C., maintaining the pH value at 6.0-7.0, stirring at a speed of 100-200 rpm, and a ventilation volume of 0.5-1.0 volume of air / volume of culture solution / minute, and fermenting for 12-24 hours, so as to convert non-protein nitrogen into microbial protein, thereby increasing the protein content and digestibility of the feed, and obtaining a bioconverted mixture; S7, performing sono-photocatalytic pretreatment on the bioconverted mixed material, adjusting the humidity of the mixed material to 25-30%, maintaining the temperature at 25-30° C., using a conditioner, stirring at a speed of 50-100 rpm for 5-10 minutes to ensure that the humidity and temperature are evenly distributed, and obtaining a mixed material with suitable humidity and temperature; S8, subjecting the mixed material with suitable humidity and temperature to sono-photocatalytic treatment, using a sono-photocatalytic reactor, applying ultrasonic waves with a frequency of 20-40 kHz and a power density of 0.5-1.5 W / cm 2 At the same time, the visible light with a wavelength of 400-700nm and a light intensity of 1000-5000lux is irradiated for 10-20 minutes. The synergistic effect of sound and light can change the molecular structure of nutrients, enhance biological activity, and obtain a mixture treated with sound and light catalysis. S9, mixing the mixture treated with sono-photocatalysis with the preheated oil and the magnetized water, preheating the oil and soybean fat lecithin powder to 50-60° C., and then adding them to the mixture, mixing with a high shear mixer to obtain a wet mixture.

6. The method for preparing feed for improving liver circulation of broiler chickens according to claim 5, characterized in that: Also includes: S10, the wet mixture is granulated into granules by a granulator, a ring die granulator is used, the die hole diameter is 2-4 mm, the pressure of the roller is 50-100 kgf / cm2, the granulation temperature is controlled at 60-80°C, and the material stays in the granulator for 30-60 seconds to obtain feed granules; S11, pre-drying the feed pellets using a fluidized bed dryer, with the temperature set at 40-50° C., the air flow velocity at 1-2 m / s, and the drying time at 10-20 minutes, so that the moisture content of the pellets is reduced to 18-20%, thereby obtaining pre-dried feed pellets; S12, subjecting the pre-dried feed particles to low-temperature spray drying, using a spray drying tower, with an air inlet temperature of 60-80°C, an air outlet temperature of 40-60°C, an atomization pressure of 5-10 MPa, and a drying time of 15-30 minutes, to reduce the moisture content to 10-12%. Low-temperature drying can retain heat-sensitive nutrients and prevent decomposition or inactivation, thereby obtaining dried feed particles.

7. The method for preparing feed for improving liver circulation of broiler chickens according to claim 6, characterized in that: Also includes: S13, cooling and screening the dried feed particles, using a cooler to reduce the temperature of the particles to room temperature of 20-25°C, and then passing through a vibrating screen with a mesh size of 2 mm to screen out fine powder less than 2 mm and oversized particles greater than 4 mm. The particle size that meets the requirements is between 2-4 mm, thereby obtaining feed particles that meet the size requirements; S14, conducting quality inspection on the feed pellets that meet the size requirements, conducting nutrient analysis, including determination of crude protein, crude fat, crude fiber, minerals and vitamins, conducting microbiological inspection to detect whether Escherichia coli and Salmonella meet the standards, and also testing whether the moisture content is 10-12%, to obtain qualified feed products; S15, packing the qualified feed products in moisture-proof and anti-oxidation composite bags or paper bags, with a single bag weight of 25-50 kg, using an automatic packaging machine to ensure tight sealing to prevent moisture and oxidation. After packaging, the products are stored in a dry, ventilated, light-proof warehouse at an ambient temperature of 0-25°C and a humidity of no more than 75%, ready for sale.

8. The method for preparing feed for improving liver circulation in broiler chickens according to claim 5, characterized in that: In step S9, the high shear mixer has a mixing speed of 500-1000 rpm and a mixing time of 5-15 minutes. During the mixing process, the temperature is maintained at 40-50° C. and the humidity reaches 30-35%.

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