Preparation method and application of broiler feed by reducing the amount of mulberry leaf powder to replace soybean meal

Abstract

The invention relates to a broiler feed preparation method and application of mulberry leaf powder that replaces soybean meal with reduced amount. The broiler feed contains mulberry leaf powder of branches, which partially replaces soybean meal and also partially replaces corn, thereby alleviating the pressure of feed raw materials. Corn and soybean meal are granulated in advance, a part of mulberry powder is first separated and mixed with soybean oil to form mulberry powder paste, feed particles are wrapped with the mulberry powder paste and then mixed with the remaining mulberry powder, and the mulberry powder is attached to the mulberry powder paste and granulated again, thereby effectively improving the feed mixing processing effect. Mulberry leaves and mulberry branches are natural plants, have no drug resistance, can stimulate disease resistance factors, do not cause pathogen mutation, can enhance animal body metabolism, promote protein and enzyme synthesis and body growth, and effectively improve broiler quality.

Description

Technical Field

[0001] The invention relates to a broiler feed preparation method and application, and in particular to a broiler feed preparation method and application using mulberry leaf powder in a reduced amount to replace soybean meal, which is applied in the field of feed technology. Background Art

[0002] The feed formula of my country's traditional breeding industry is mainly composed of corn and soybean meal, and the demand for soybean meal imports is relatively large. Reducing and replacing soybean meal has become the focus and important direction of the development of animal husbandry feed today.

[0003] According to the determination of many scientific research institutions at home and abroad, mulberry leaf dry powder contains 18%-30% protein, 4%-10% crude fat, 0.3%-0.86% calcium, 1.9%-2.87% potassium, 0.47%-0.63% magnesium, and also contains a large amount of iron, zinc, copper and other minerals and a variety of microorganisms, and a full range of amino acids. In particular, it contains a variety of natural active substances, and also has the effects of anti-stress, enhancing body endurance and improving disease resistance. Mulberry leaves contain a substance called 1-deoxynozoline (DNJ), which is an alkaloid that only exists in mulberry leaves, with a content of about 100mg / 100g. This alkaloid is an inhibitor of α-glycosidase. Mulberry leaves contain not only DNJ, but also rich gamma-aminobutyric acid and phytol, and its content is 3-4 times that of green tea;

[0004] However, the production and application of mulberry leaf powder in feed is seldom used, because most of the feed raw materials are corn and soybean meal, corn particles are large, soybean meal contains fine powder and bean skin, mulberry leaf powder cannot be mixed evenly when feeding the feed raw materials, and an appropriate amount of oil needs to be added during the feed processing. The mixing of oil is prone to produce oil clumps, which is not conducive to the uniform mixing of the feed and affects the quality of the feed.

[0005] Application Contents

[0006] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is that mulberry powder cannot be evenly mixed into feed raw materials, and the added oil is easy to produce oil clumps during the raw material mixing process.

[0007] In order to solve the above problems, the present invention provides a method for preparing broiler feed by using mulberry leaf powder to replace soybean meal and its application. The broiler feed comprises the following ingredients in terms of mass percentage: 60%-70% corn, 20%-25% soybean meal, 3%-5% soybean oil, and 2%-6% mulberry powder;

[0008] The preparation method comprises the following steps:

[0009] S1. Mix corn and soybean meal, add them into a feed pelletizer for pelleting, and obtain preliminary feed pellets for later use;

[0010] S2, separating 30%-50% of the mulberry powder and mixing it with soybean oil to make mulberry powder paste, putting the preliminary feed pellets and mulberry powder paste obtained in S1 into a horizontal mixing device, stirring them using a mixing component, and then sprinkling the remaining mulberry powder into the horizontal mixing device, continuing to stir, and obtaining pellets for standby use;

[0011] S3, adding the pellets obtained in S2 into the feed pelletizer again for pelleting, and then bagging and packaging to obtain the broiler feed pellets.

[0012] In the above-mentioned broiler feed preparation method and application in which mulberry leaf powder is reduced in amount to replace soybean meal, a mixing component is used to mix the feed. When the spreading hopper filled with mulberry powder is turned over and shaken, the spreading net is shaken left and right by shaking the toggle rod, thereby effectively improving the uniform mixing effect of the mulberry powder, making it easier for the initial feed particles to wrap the scattered mulberry powder with the mulberry powder paste. Compared with the existing feed mixing method, the phenomenon of oil clumping is effectively reduced, thereby effectively improving the feed mixing processing effect, and then improving the quality of broiler feed.

[0013] As a further improvement of the present application, mulberry powder is made from mechanically harvested hybrid mulberry branches, 80-day-old branches containing leaves, which are harvested, dried, and crushed into 200-mesh powder.

[0014] As a further improvement of the present application, the granulation size of step S1 is larger than the granulation size of step S3, the granulation diameter of step S1 is 18-20 mm, and the granulation diameter of step S3 is 3-5 mm.

[0015] As another improvement of the present application, the mixing assembly in step S2 includes a stirring shaft rotatably installed inside the stirring chamber, and a spreading hopper placed on the top of the stirring chamber, and the spreading hopper is vertically corresponding to the stirring shaft.

[0016] As another improved supplement of the present application, one end of the top of the mixing bin is fixedly connected to a fixed shaft, and the other end of the top of the mixing bin is rotatably connected to a bump shaft, and the fixed shaft is parallel to the bump shaft, and the two ends of the spreading hopper are respectively mounted on the top of the fixed shaft and the bump shaft, and the middle cross-section of the bump shaft is triangular. The triangular bump shaft is used to drive the spreading hopper to flip, bump and vibrate, which is convenient for spreading mulberry powder.

[0017] As another improved supplement to the present application, one end of the bump shaft is fixedly connected to a pulley, one end of the stirring shaft is fixedly connected to a transmission wheel, the outside of the transmission wheel is meshed with a belt gear, the belt gear and the pulley are connected by a belt, the outer ring teeth of the transmission wheel are arranged at ninety degrees to realize the transmission between the stirring shaft and the bump shaft, the transmission wheel intermittently meshes with the belt gear to realize the intermittent rotation of the bump shaft, which is convenient for the intermittent spreading of mulberry powder.

[0018] As another improvement of the present application, a support plate is fixedly connected to the middle of the spreading hopper, a toggle rod is fixedly connected to the bottom of the support plate, a spreading net is fixedly connected to the outside of the toggle rod, and a buffer ring is fixedly connected between the outer ring of the spreading net and the inner wall of the spreading hopper. During the vibration of the spreading hopper, the toggle rod is shaken to increase the left and right turbulence effect of the spreading net, thereby further improving the spreading effect of the mulberry powder.

[0019] As another improvement supplement of the present application, a counterweight ball is fixedly connected to the bottom end of the toggle rod, the toggle rod is made of an elastic plastic rod, and the counterweight ball is made of a metal material. The toggle rod made of the counterweight ball and the elastic plastic rod can effectively improve the shaking effect of the toggle rod.

[0020] As another improvement supplement of the present application, a stirring blade is fixedly connected to the outside of the stirring shaft, and the outer end of the stirring blade is in contact with the counterweight ball. The inside of the stirring blade and the counterweight ball are both inlaid with magnet sheets, and the two groups of magnet sheets are magnetically attracted to each other. The stirring blade is used to move the counterweight ball to achieve deformation and bending of the toggle rod, and then the toggle rod is shaken left and right when it is restored.

[0021] The broiler feed is prepared by using mulberry leaf powder to replace soybean meal in a reduced amount. The broiler feed is prepared by the above method. Eating the feed has the function of promoting the growth and development of broiler bodies, improving the growth and weight gain of broilers, and at the same time improving the feed-to-meat conversion rate of broilers, enhancing the immunity of broilers, and improving the comprehensive muscle quality of broilers.

[0022] To sum up, the broiler feed contains mulberry leaf powder of branches, which can partially replace soybean meal and also partially replace corn, alleviating the pressure of feed raw materials. Corn and soybean meal are granulated in advance, and part of mulberry powder is first separated and mixed with soybean oil into mulberry powder paste. Feed particles are wrapped with mulberry powder paste and then mixed with the remaining mulberry powder. Mulberry powder is attached to the mulberry powder paste and granulated again, which effectively improves the feed mixing processing effect. Mulberry leaves and mulberry branches are natural plants, have no drug resistance, and can stimulate disease-resistant immune factors, enhance animal metabolism, promote protein and enzyme synthesis and body growth, and effectively improve the quality of broilers. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a flow chart of the first implementation method of this application;

[0024] Figure 2 This is a bar graph showing the effect of feeding the improved feed on broiler weight gain according to the first embodiment of the present application;

[0025] Figure 3 This is a bar graph showing the effect of feeding the improved feed according to the first embodiment of the present application on the peripheral lymphocyte immunity of broiler chickens;

[0026] Figure 4This is a bar graph showing the effect of feeding the improved feed according to the first embodiment of the present application on the serum SOD activity of broilers;

[0027] Figure 5 This is a bar graph showing the effect of feeding the improved feed according to the first embodiment of the present application on the serum lysozyme content of broilers;

[0028] Figure 6 This is a three-dimensional structural diagram of a mixing assembly according to a second embodiment of the present application;

[0029] Figure 7 This is a three-dimensional structural diagram of a mixing chamber according to a second embodiment of the present application;

[0030] Figure 8 This is a bottom-up stereoscopic structural diagram of a spreading hopper according to a second embodiment of the present application;

[0031] Fig. 9 This is a side sectional view of a spreading hopper according to a second embodiment of the present application;

[0032] Fig.10 This is a side cross-sectional view of a mixing chamber according to a second embodiment of the present application;

[0033] Fig.11 This is a three-dimensional structural diagram of the stirring shaft according to the second embodiment of the present application.

[0034] Description of the numbers in the figure:

[0035] 1. Mixing chamber; 101. Fixed shaft; 102. Bumping shaft; 103. Pulley; 2. Mixing shaft; 201. Transmission wheel; 202. Belt gear; 203. Mixing blade; 3. Spreading hopper; 301. Support plate; 302. Stirring rod; 303. Spreading net; 304. Buffer ring; 305. Counterweight ball; 306. Magnet sheet. DETAILED DESCRIPTION

[0036] Three implementation modes of the present application are described in detail below with reference to the accompanying drawings.

[0037] The first implementation method:

[0038] Figure 1-5 The invention shows a method and application of preparing broiler feed by reducing the amount of mulberry leaf powder to replace soybean meal, wherein the broiler feed comprises the following ingredients by mass percentage: 60%-70% corn, 20%-25% soybean meal, 3%-5% soybean oil, and 2%-6% mulberry powder;

[0039] The preparation method comprises the following steps:

[0040] S1. Mix corn and soybean meal, add them into a feed pelletizer for pelleting, and obtain preliminary feed pellets for later use;

[0041] S2, separating 30%-50% of the mulberry powder and mixing it with soybean oil to make mulberry powder paste, putting the preliminary feed pellets and mulberry powder paste obtained in S1 into a horizontal mixing device, stirring them using a mixing component, and then sprinkling the remaining mulberry powder into the horizontal mixing device, continuing to stir, and obtaining pellets for standby use;

[0042] S3, adding the pellets obtained in S2 into the feed pelletizer again for pelleting, and then bagging and packaging to obtain the broiler feed pellets.

[0043] The mulberry powder is made of mechanically harvested hybrid mulberry branches, 80-day-old branches with leaves, which are sun-dried after harvesting and crushed into 200-mesh powder. The granulation size of step S1 is larger than the granulation size of step S3. The granulation diameter of step S1 is 18-20 mm, and the granulation diameter of step S3 is 3-5 mm.

[0044] The broiler feed is prepared by using mulberry leaf powder to replace soybean meal in a reduced amount. The broiler feed is prepared by the above method. Eating the feed has the function of promoting the growth and development of broiler bodies, improving the growth and weight gain of broilers, and at the same time improving the feed-to-meat conversion rate of broilers, enhancing the immunity of broilers, and improving the comprehensive muscle quality of broilers.

[0045] Animal experiment setup.

[0046] Experimental feed selection:

[0047] Control group (CK): commonly used feed on the market;

[0048] One group (C1): 2% by mass of mulberry powder in broiler feed;

[0049] Group 2 (C2): 4% by mass of mulberry powder in broiler feed;

[0050] Group three (C3): 6% by mass of mulberry powder was added to broiler feed.

[0051] Experimental grouping: The experiment was divided into 4 treatment groups, each group had 6 replicates, each replicate had 10 chickens, a total of 240 chickens, the control group was fed with a basic diet, and the experimental group was fed for 8 weeks.

[0052] Determine the changes in indicators such as average daily weight gain, average daily feed consumption, and statistical feed-to-meat ratio.

[0053] The test samples were taken every week to measure serum biochemical indicators, including serum albumin, alanine aminotransferase, aspartate aminotransferase, high-density lipoprotein cholesterol, low-density lipoprotein cholesterol, total cholesterol, thyroglobulin, total protein and serum urea.

[0054] In the experiment, heparinized anticoagulated blood was sampled every 4 weeks for white blood cell count, peripheral blood lymphocytes were separated, and lymphocyte proliferation activity was tested by MTT.

[0055] Experimental results:

[0056] (1) Effect of mulberry powder replacing improved feed on broiler growth:

[0057] During the entire feeding experiment, the chickens in the treatment groups grew well, and their overall appearance and foraging performance were normal. After feeding broilers for 2 weeks, the average weight gain of the control group was 84.58g, and the weight gain of the mulberry powder treatment group was 38.30-59.63g. There was no significant difference in weight gain between the control group and the mulberry powder improved feed treatment group; but after feeding broilers for 4 weeks, the weight gain of broilers in the C1 and C2 mulberry powder improved feed groups was not significantly different from that in the control group, but the weight gain of broilers in the C3 mulberry powder improved feed group was not significantly different from that in the C1 improved group and the C2 improved group. Figure 2 As shown, compared with the control group, it was significantly lower.

[0058] Observation of feed usage showed that the overall feed intake of experimental chickens showed an increasing trend, reaching a peak at 4-6 weeks of the experiment, and then began to decrease. The decrease in the control group and the C3 supplemented group was more obvious (Table).

[0059] Table: Comparison of average feeding materials during the experimental period:

[0060]

[0061] The feed conversion efficiency increased during the 8-week experimental period, and the feed-to-meat conversion rate decreased with the increase of mulberry leaf powder addition, with the C3 group having a more prominent effect. The feed-to-meat ratio of the C3 mulberry powder-improved feed group was significantly different from that of the control group, but the feed-to-meat ratio of the C1 and C2 mulberry powder-improved feed groups was not significantly different from that of the control group, indicating that the addition of C2 and below has little effect on feed-to-meat conversion.

[0062] Table: Statistical analysis of feed-to-meat ratio during the experimental period:

[0063]

[0064] (2) Lymphocyte proliferation assay:

[0065] Peripheral blood was collected, lymphocytes were separated, and lymphocyte proliferation was detected under ConA stimulation. The results showed that at 8 weeks of experimental treatment, the lymphocyte proliferation of the mulberry powder-added group showed an upward trend compared with the control group. Figure 3This indicates that mulberry powder-modified broiler feed has the potential to improve the body's lymphocyte proliferation ability and promote immune enhancement.

[0066] (3) Improved feed promotes the improvement of broiler chickens’ antioxidant capacity:

[0067] The peroxide ions and hydroxyl free radicals produced during metabolism can cause cell damage. The stronger the antioxidant capacity of the animal body, the more effectively it can avoid the negative effects of oxidation on the body. After feeding with mulberry powder modified feed, the activity of SOD was stimulated to increase. Statistical analysis showed that the serum SOD of the mulberry powder modified feed treatment group was significantly higher than that of the control group, indicating that the antioxidant capacity of the chicken body was improved. Figure 4 The C2 modified group performed better.

[0068] (4) Effect of improved feed on serum lysozyme content:

[0069] As one of the body's nonspecific immune factors, lysozyme participates in a variety of immune responses. It plays an important role in maintaining the body's physiological balance in the body's normal defense function and nonspecific immunity: it can enhance the resistance of defense factors in the body such as serum sterilizing protein (Properdin) and γ-globulin (γ-globulin) to infection; it promotes bacterial cell lysis, stimulates the immune system, stimulates the phagocytic effect of phagocytes in the body, and enhances disease resistance and production performance. After feeding the mulberry powder improved feed for 4 weeks, there was no significant difference in serum lysozyme content among different groups. However, when the feeding continued for 6 weeks, the C2 feed group was significantly higher than the control group, and when the feeding was 8 weeks, the lysozyme content of the C2 and C3 improved feed groups was significantly higher than that of the control group. Figure 5 This suggests that the C2 content of mulberry powder stimulates the immune enhancement effect faster, and the C3 feed group may be affected by other factors, and the immune enhancement effect is slightly delayed.

[0070] (5) Improved feed safety does not affect broiler slaughter indicators:

[0071] Slaughter performance is an important reference indicator for measuring the meat production performance of livestock and poultry. Chickens with a slaughter rate higher than 80% and a full-carcass net weight higher than 60% are considered to have good meat production performance. As can be seen from the table, the slaughter rates of the improved feed group and the control group in this experiment reached 95.08% to 95.83%, and the improved feed group was slightly higher than the normal control group; in terms of semi-eviscerated rate, each group reached 88.22% to 89.35%; the full-carcass rate of the improved feeding group was 82.07% to 82.57%, higher than the full-carcass rate of 79.87% in the control group, and higher than the 60% standard for judging good meat production performance of poultry. At the same time, since the quality attributes of poultry meat are mainly composed of physical properties such as muscle appearance, texture tenderness, water retention, and aroma, shear force mainly reflects muscle tenderness, and water loss rate reflects the water retention capacity of muscle. Our test results show that the shear force of the group fed with improved feed is higher than that of the control group. This is mainly related to the effect of mulberry powder improved feed on muscle development. The shear force increases. It is generally believed that the smaller the muscle fiber diameter and the greater the density, the better the muscle quality. This shows that feeding improved mulberry powder feed does not affect the slaughter meat yield, which is excellent.

[0072] Table: Effects of feeding improved feed on broiler slaughter indicators:

[0073]

[0074]

[0075] (7) Effects of feeding modified diets on serum aspartate aminotransferase, alanine aminotransferase activities and serum urea:

[0076] ALT participates in the metabolic process of alanine, converting alanine into pyruvate, and then participates in the synthesis of glycogen or the production of energy. It catalyzes a series of important metabolic processes in the body, which is very important for maintaining the body's energy balance and metabolic stability. ALT is mainly present in the liver, and the detection of serum ALT levels is of guiding significance for judging liver function. Normal animals have low serum aspartate aminotransferase. When diseases occur in the liver, heart, and skeletal muscle of the animal body, the above enzymes will enter the blood, thereby causing an increase in enzyme activity in the serum. By measuring the above serum enzyme activity, the health status of the animal body can be effectively monitored. After the treatment with this patent configuration, the relative content of ALT is the lowest, and the serum aspartate aminotransferase activity (AST) of this group is the lowest, indicating that the C2 mulberry powder added group of improved feed has the most obvious effect on liver function and body protection.

[0077] Urea is one of the end products of the body's amino acid metabolism and is excreted from the body with urine. The serum urea content in a healthy body is low. Changes in blood urea content are often used clinically to diagnose kidney, bladder and urethral diseases.

[0078] Mulberry powder-modified feed can reduce serum urea content, and the effect is more obvious when added to a 4% combination ratio.

[0079]

[0080]

[0081] (8) Effects of feeding modified diets on serum aspartate aminotransferase, alanine aminotransferase activities and serum urea:

[0082] The results of this study showed that the addition of mulberry leaf powder had a tendency to increase the content of high-density lipoprotein cholesterol in serum and reduce the content of total cholesterol and low-density lipoprotein cholesterol in serum (see the table below), among which the effect of adding C2 group was more significant. This suggests that the mulberry powder-modified feed has a tendency to reduce the content of total cholesterol and low-density lipoprotein cholesterol in serum and increase the content of high-density lipoprotein cholesterol in serum, which helps to maintain a good blood lipid metabolism level in broilers, prevent the deposition of cholesterol and fat in the body, and promote the growth and development of the body.

[0083]

[0084]

[0085] In summary, it is confirmed that the application effect of the mulberry powder improved feed in group C2 of this patent application is the best.

[0086] The second implementation method:

[0087] In this embodiment, in the process of preparing broiler feed, a mixing component and its related contents are added. The specific newly added structure is as follows, and the remaining structure is consistent with the first embodiment.

[0088] Figure 6-7 It is shown that the mixing assembly in step S2 includes a stirring shaft 2 rotatably installed inside the stirring bin 1, and a spreading hopper 3 placed on the top of the stirring bin 1, the spreading hopper 3 corresponds vertically to the stirring shaft 2, one end of the top of the stirring bin 1 is fixedly connected to a fixed shaft 101, and the other end of the top of the stirring bin 1 is rotatably connected to a bumping shaft 102, and the fixed shaft 101 corresponds parallel to the bumping shaft 102, and the two ends of the spreading hopper 3 are respectively arranged on the top of the fixed shaft 101 and the bumping shaft 102, and the middle cross-section of the bumping shaft 102 is triangular, and the triangular bumping shaft 102 drives the spreading hopper 3 to flip, bump and vibrate, which is convenient for spreading mulberry powder, one end of the bumping shaft 102 is fixedly connected to a pulley 103, and one end of the stirring shaft 2 is fixedly connected to a transmission wheel 201, and the outer meshing connection of the transmission wheel 201 is a belt gear 202, and the belt gear 202 is connected to the pulley 103 by a belt, and the outer ring teeth of the transmission wheel 201 are arranged at ninety degrees;

[0089] The transmission wheel 201 on the stirring shaft 2 rotates one circle, and the outer ring teeth arranged at 90 degrees are intermittently meshed with the belt gear 202 for transmission, and then the transmission wheel 201 is connected to the transmission by belt transmission, so as to realize the intermittent rotation of the bumping shaft 102, which is convenient for the intermittent spreading of mulberry powder and effectively improves the spreading and mixing effect of mulberry powder.

[0090] Figure 8-10 As shown, a support plate 301 is fixedly connected to the middle of the spreading hopper 3, a toggle rod 302 is fixedly connected to the bottom of the support plate 301, the toggle rod 302 made of an elastic plastic rod has good deformation elasticity, a spreading net 303 is fixedly connected to the outside of the toggle rod 302, and a buffer ring 304 is fixedly connected between the outer ring of the spreading net 303 and the inner wall of the spreading hopper 3;

[0091] When the scattering hopper 3 filled with mulberry powder is turned over and shaken, the scattering net 303 is shaken left and right by shaking the toggle rod 302 and utilizing the elasticity of the toggle rod 302, thereby effectively improving the uniform mixing effect of the mulberry powder, thereby improving the feed mixing effect, and further improving the quality of broiler feed.

[0092] The third implementation method:

[0093] Compared with the second embodiment, the present embodiment cancels the bumping shaft 102 structure of the spreading hopper 3, and adds a counterweight ball 305 structure and related contents. The specific newly added structure is as follows, and the remaining structure is consistent with the second embodiment.

[0094] Figure 9-11 It is shown that the bottom end of the toggle rod 302 is fixedly connected to a counterweight ball 305, the toggle rod 302 is made of an elastic plastic rod, the counterweight ball 305 is made of a metal material, the outside of the stirring shaft 2 is fixedly connected to a stirring blade 203, the outer end of the stirring blade 203 is in contact with the counterweight ball 305, the inside of the stirring blade 203 and the counterweight ball 305 are both inlaid with magnet sheets 306, and the two groups of magnet sheets 306 are magnetically attracted to each other, the two groups of magnet sheets 306 are magnetically attracted to each other, so that the counterweight ball 305 is sucked onto the stirring blade 203, thereby improving the fluctuation effect of the stirring blade 203 on the toggle rod 302.

[0095] Compared with the second embodiment, this embodiment changes the way in which the spreading hopper 3 drives the shaking rod 302 to achieve the left and right turbulence of the spreading net 303, but directly uses the stirring blade 203 to shake the counterweight ball 305 to achieve the deformation and bending of the shaking rod 302, and shakes the shaking rod 302 left and right when it recovers, thereby simplifying the stirring and mixing structure.

[0096] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the scope of protection of the present invention.

Claims

1. A method for preparing broiler feed by using mulberry leaf powder to replace soybean meal, characterized in that: The broiler feed comprises the following ingredients in percentage by mass: 60%-70% corn, 20%-25% soybean meal, 3%-5% soybean oil, and 2%-6% mulberry powder, the sum of the above components being 100%; The preparation method comprises the following steps: S1. Mix corn and soybean meal, add them into a feed pelletizer for pelleting, and obtain preliminary feed pellets for later use; S2, separating 30%-50% of the mulberry powder and mixing it with soybean oil to make mulberry powder paste, putting the preliminary feed pellets and mulberry powder paste obtained in S1 into a horizontal stirring device, stirring them using a mixing component, and then sprinkling the remaining mulberry powder into the horizontal stirring device, continuing to stir, and obtaining pellets for standby use; S3, adding the pellets obtained in S2 into the feed pelletizer again for pelleting, and then bagging and packaging to obtain the broiler feed pellets; The mixing assembly in step S2 comprises a stirring shaft (2) rotatably mounted inside the stirring chamber (1) and a material spreading hopper (3) placed on the top of the stirring chamber (1), wherein the material spreading hopper (3) vertically corresponds to the stirring shaft (2), one end of the top of the stirring chamber (1) is fixedly connected to a fixed shaft (101), and the other end of the top of the stirring chamber (1) is rotatably connected to a bumping shaft (102), and the fixed shaft (101) and the bumping shaft (102) correspond in parallel, and the two ends of the material spreading hopper (3) are respectively mounted on the top of the fixed shaft (101) and the bumping shaft (102), and the middle cross-section of the bumping shaft (102) is arranged in a triangular shape, one end of the bumping shaft (102) is fixedly connected to a pulley (103), and one end of the stirring shaft (2) is fixedly connected to a transmission wheel (201), and the outer portion of the transmission wheel (201) is meshedly connected to a belt gear (202), and the belt gear (202) and the pulley (103) are connected by a belt. The outer ring teeth of the transmission wheel (201) are arranged at 90 degrees, the middle of the hopper (3) is fixedly connected to a support plate (301), the bottom of the support plate (301) is fixedly connected to a toggle rod (302), the outside of the toggle rod (302) is fixedly connected to a scattering net (303), a buffer ring (304) is fixedly connected between the outer ring of the scattering net (303) and the inner wall of the hopper (3), and the bottom of the toggle rod (302) is fixedly connected to the scattering net (303). The end of the stirring shaft (2) is fixedly connected to a counterweight ball (305), the toggle rod (302) is made of an elastic plastic rod, the counterweight ball (305) is made of a metal material, the outside of the stirring shaft (2) is fixedly connected to a stirring blade (203), the outer end of the stirring blade (203) is in contact with the counterweight ball (305), the inside of the stirring blade (203) and the counterweight ball (305) are both inlaid with magnet pieces (306), and the two groups of magnet pieces (306) are arranged to attract each other magnetically.

2. The method and application of preparing broiler feed by using mulberry leaf powder to replace soybean meal according to claim 1, characterized in that: The mulberry powder is made from hybrid mulberry branches harvested mechanically, branches containing leaves that grow for 80 days, which are sun-dried after harvesting and crushed into 200-mesh powder.

3. The method for preparing broiler feed by using mulberry leaf powder to replace soybean meal according to claim 1, characterized in that: The granulation size of step S1 is larger than that of step S3. The granulation diameter of step S1 is 18-20 mm, and the granulation diameter of step S3 is 3-5 mm.

4. The application of reducing the amount of mulberry leaf powder to replace soybean meal in preparing broiler feed is characterized by: The broiler feed is prepared by the method described in claim 1. Eating the feed has the function of promoting the growth and development of broiler bodies, improving the growth and weight gain of broilers, and at the same time improving the feed-to-meat conversion rate of broilers and improving the comprehensive muscle quality of broilers.

Images