Concentrated feed for improving reproductive performance of boars and processing technology of concentrated feed

Abstract

The invention discloses a concentrated feed for improving reproductive performance of boars and a processing technology thereof, the concentrated feed comprises the following components in parts by weight: 200-300 parts of fermented soybean meal, 200-250 parts of soybean meal, 100-150 parts of wheat middling, 100-150 parts of puffed corn flour, 55-70 parts of fish meal, 15-25 parts of calcium hydrophosphate, 10-15 parts of clam shell powder, 15-50 parts of flaxseeds, 5-15 parts of soybean oil, 5-15 parts of glucose, 45-55 parts of an additive and the balance of a carrier, and the processing technology is provided. Through scientific formula design and reasonable use of additives, the ejaculation amount, sperm density and vitality of boars can be remarkably improved, the sperm malformation rate can be effectively reduced, efficient breeding is achieved, and the provided concentrated feed has good safety and economical efficiency, can effectively replace traditional feed additives, and is suitable for large-scale production. Healthy growth of boars is promoted, and breeding benefits are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of animal feed, and in particular relates to a concentrated feed for improving the reproductive performance of boars and a processing technology thereof. Background Art

[0002] In modern pig farming, the reproductive performance of boars directly affects the economic benefits and production efficiency of pig farms. With the expansion of farming scale and the continuous advancement of farming technology, improving the reproductive performance of boars has become an important issue that needs to be urgently addressed in the farming industry. The reproductive performance of boars mainly includes indicators such as ejaculation volume, sperm density, sperm motility and sperm deformity rate. These indicators are not only closely related to the nutritional status of boars, but also affected by feed composition, feeding management and environmental factors.

[0003] Boars are the core of reproduction, and their reproductive performance is directly related to the quality and quantity of their offspring. Improving the amount of semen and sperm quality of boars can not only increase the conception rate, but also optimize the reproductive efficiency of breeding pigs, thereby reducing breeding costs and increasing economic benefits. Therefore, researching and developing effective feed additives and concentrated feeds to improve the reproductive performance of boars has become an urgent need in the breeding industry.

[0004] The quality of boars not only affects the conception rate and litter size of sows, but also affects the production performance of piglets and fattening pigs. "A good sow in one litter means a good boar in one slope." Modern large-scale boar breeding has a heavy task of mating. One boar can bear the task of mating 100 sows and can breed thousands of piglets. At present, the amount of boar feed used is less than 0.5% of the feed used in pig farms. Targeted boar feed research and development has received little attention, especially in terms of improving boar performance. Further in-depth development is needed. The existing boar feed on the market is generally difficult to meet the increasingly improved reproductive performance of boars. There is still a lot of room for improvement in stimulating boar sexual desire, increasing semen collection, and improving sperm quality. Summary of the invention

[0005] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a concentrated feed for improving the reproductive performance of boars and a processing technology thereof, thereby solving the above-mentioned technical problems existing in the prior art.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] A concentrated feed for improving the reproductive performance of boars, comprising the following components in parts by weight:

[0008] 200 - 300 parts of fermented soybean meal, 200 - 250 parts of soybean meal, 100 - 150 parts of wheat middlings, 100 - 150 parts of expanded corn flour, 55 - 70 parts of fish meal, 15 - 25 parts of calcium hydrogen phosphate, 10 - 15 parts of clam shell powder, 15 - 50 parts of flaxseed, 5 - 15 parts of soybean oil, 5 - 15 parts of glucose, 45 - 55 parts of additive, and the balance is carrier.

[0009] Further, the additive comprises the following components in parts by weight: 2.0 - 3.5% of high - activity dry yeast, 0.1 - 0.3% of Lactobacillus, 0.1 - 0.3% of Bacillus subtilis, 0.05 - 0.1% of Bifidobacterium, 4 - 6% of Saccharomyces cerevisiae cell wall, 0.5 - 0.8% of yeast selenium, 1.0 - 2.0% of ω - 3 fatty acid (microencapsulated), 1.0 - 2.0% of glucomannan, 0.005 - 0.01% of chromium picolinate, 3.0 - 8.0% of amino acids, 3 - 4% of choline chloride, 3 - 4% of sodium chloride, 8 - 12% of organic trace element complex, 2 - 4% of vitamin complex, 2 - 4% of taurine, 1.5 - 2.5% of raspberry extract, 0.5 - 1.0% of desert cistanche extract, 2.0 - 3.5% of hypericin, 1.0 - 2.0% of maca powder, 1.0 - 2.0% of betaine, 1 - 1.5% of mold inhibitor, 0.2 - 0.4% of ethoxyquinoline, and the balance is chaff powder.

[0010] Further, the additive comprises the following components in parts by weight: 3% of high - activity dry yeast, 0.2% of Lactobacillus, 0.2% of Bacillus subtilis, 0.08% of Bifidobacterium, 5% of Saccharomyces cerevisiae cell wall, 0.6% of yeast selenium, 1.5% of ω - 3 fatty acid, 1.5% of glucomannan, 0.008% of chromium picolinate, 6% of amino acids, 3.5% of choline chloride, 3% of sodium chloride, 12% of organic trace element complex, 3% of vitamin complex, 3% of taurine, 2.0% of raspberry extract, 0.8% of desert cistanche extract, 3.0% of hypericin, 1.5% of betaine, 1.5% of maca powder, 1.2% of mold inhibitor, 0.3% of ethoxyquinoline, and the balance is chaff powder.

[0011] Further, the method for extracting the raspberry extract comprises the following steps:

[0012] S101: Add pectinase in a temperature environment of 45°C, apply low - frequency ultrasonic wave with a frequency of 20 kHz and a power of 100 W for 30 min to decompose pectin and cell matrix;

[0013] S102: Raise the temperature to 55°C, add cellulase, apply low - frequency ultrasonic wave with a frequency of 40 kHz and a power of 300 W, and continue enzymatic hydrolysis for 30 min to completely destroy the cell wall;

[0014] S103, centrifuging after enzymatic hydrolysis to obtain the supernatant, retaining the soluble components in the enzymatic hydrolysis solution, and obtaining a raspberry extract.

[0015] In this process, low-frequency ultrasound is applied to the material during the enzymatic hydrolysis stage.

[0016] Furthermore, the method for extracting the deserticola Cistanche extract comprises the following steps:

[0017] The deserticola cistanche was crushed by a water-cooled grinder and then put into a supercritical extraction device for extraction;

[0018] Using supercritical CO 2 The extraction was performed for 2 h, and the temperature was controlled at 50°C, the pressure was 30 MPa, and the ethanol entrainer was 10%;

[0019] Deproteinize to a protein content of less than 5%, and remove small molecular impurities by dialysis to obtain 85% high-purity deserticola polysaccharide. The preparation method of the concentrated feed for improving the reproductive performance of boars comprises the following steps:

[0020] S1. The weighed high-activity dry yeast, lactobacillus, bacillus subtilis, bifidobacterium, cell wall of saccharomyces cerevisiae, yeast selenium, ω-3 fatty acids and bran shell powder are fully mixed to form material A;

[0021] Fully mix glucomannan, chromium picolinate, amino acid, choline chloride, sodium chloride, organic trace element complex, vitamin complex, taurine, raspberry extract, desert Cistanche extract, hypericin, betaine and maca powder to prepare material B;

[0022] Mixing material A, material B, a mildew preventer, ethoxyquinoline and the remaining amount of husk powder to obtain an additive component;

[0023] S2. After accurately weighing the soybean meal, second-grade flour, puffed corn meal, fish meal, calcium hydrogen phosphate, clam shell powder, glucose, and carrier that have been crushed and passed through a 400-mesh sieve, put them into a mixer and mix them for 30 to 45 seconds, then spray the weighed soybean oil and add the weighed additives, and mix them again for 30 to 45 seconds to obtain concentrated feed.

[0024] Furthermore, in S1, the temperature of material A during mixing is controlled within 35°C.

[0025] Furthermore, the method of use is: mixing the concentrated feed with corn in a weight ratio of 4:6 and then feeding.

[0026] Furthermore, in said S1, when the additive is obtained, the coefficient of variation of the mixing uniformity of the material is less than 5%;

[0027] In S2, when the concentrated feed is obtained, the coefficient of variation of the mixing uniformity of the material is less than 7%.

[0028] Further, in S1, when the material A, material B, the mildew preventive, ethoxyquin and the balance of bran shell powder are mixed, they are mixed for 5 to 10 minutes, and at the same time, the rotation speed of the mixer is controlled to be 10 to 12 rpm.

[0029] Advantages of the present invention:

[0030] 1. The formula obtained by compounding in the present application selects high - activity dry yeast, Saccharomyces cerevisiae cell wall, yeast selenium, raspberry and hypericin and other components for compounding, optimizes the component composition ratio, has an anti - stress health care function, and can effectively regulate reproductive performance, improve the reduction of boar ejaculate volume and poor semen quality.

[0031] 2. Other components in the concentrated feed of the present application, especially fish meal, cooperate with the core feed additive, have a good effect on regulating endocrine, can significantly improve the reproductive performance of boars after feeding, enhance the libido of boars, increase ejaculate volume, sperm density and motility. Specific embodiments

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the scope of protection of the present invention.

[0033] Embodiment 1:

[0034] The concentrated feed for improving the reproductive performance of boars provided by the embodiment of the present invention includes the following components by weight: 300 kg of fermented soybean meal, 200 kg of soybean meal, 100 kg of wheat middlings, 150 kg of expanded corn flour, 70 kg of fish meal, 25 kg of calcium hydrogen phosphate, 15 kg of clam shell powder, 50 kg of flaxseed, 15 kg of soybean oil, 15 kg of glucose, and 55 kg of additive.

[0035] Among them, the composition of the additive is: 3 kg of high - activity dry yeast, 0.2 kg of Lactobacillus, 0.2 kg of Bacillus subtilis, 0.08 kg of Bifidobacterium, 3 kg of Saccharomyces cerevisiae cell wall, 0.8 kg of yeast selenium, 1.5 kg of ω - 3 fatty acid (microencapsulated), 1.5 kg of glucomannan, 0.008 kg of chromium picolinate, 6 kg of amino acids, 3.5 kg of choline chloride, 3 kg of sodium chloride, 12 kg of organic trace element complex, 3 kg of vitamin complex, 3 kg of taurine, 2.0 kg of raspberry extract, 0.8 kg of desert cistanche extract, 3 kg of hypericin, 1.5 kg of betaine, 1.5 kg of maca powder, 1.2 kg of mildew preventive, 0.3 kg of ethoxyquin and bran shell powder.

[0036] At this time, high-activity dry yeast: rich in essential amino acids, especially lysine, containing abundant B vitamins and other active substances, can promote the growth and development of animals and improve production performance. In addition, high-activity dry yeast is superior to feed additives such as antibiotics, can promote the development of immune organs and enhance the activity of immune cells, thus ensuring the health of animals.

[0037] Saccharomyces cerevisiae cell wall: effectively enhances the functional state of macrophages and neutrophils through the contained β-glucan, regulates the immune response, and increases the resistance of animals to Gram-negative bacterial infections. In addition, it can adsorb a variety of mycotoxins, helping to reduce the accumulation of mycotoxins in animals. Therefore, it can be used as a high-quality feed component to reduce breeding costs.

[0038] Yeast selenium: converted from inorganic selenium absorbed by yeast during growth, compared with inorganic selenium, it has higher bioavailability and lower toxicity. Yeast selenium can improve the generation and activity of immune cells and enhance the disease resistance of animals. In addition, it also has an antioxidant effect, can neutralize free radicals, reduce oxidative damage, and delay the aging process of animals.

[0039] Chromium picolinate: by reducing the concentration of serum cortisol in the body and avoiding the additional loss of trace elements such as Zn, Cu, Fe, Mn, Cr, etc., chromium picolinate can enhance the immune function of animals and reduce the occurrence of diseases. It can promote muscle generation and avoid the impact of excessive fat deposition on reproductive performance. In addition, chromium can reduce the damage of heat stress to male testicular tissue and semen quality.

[0040] Taurine: High-quality breeding boars need to have excellent performance in aspects such as libido, ejaculate volume, sperm density, and sperm quality. Taurine can improve sperm density, reduce the sperm malformation rate, and long-term use can increase the content of serum luteinizing hormone and testosterone, enhance libido, and increase the semen collection volume.

[0041] Rubus idaeus: It is a traditional Chinese herb that can improve sexual function, promotes the prostate to secrete male hormones, and has the effects of tonifying the kidney and consolidating essence, and warming the kidney and strengthening yang.

[0042] Cistanche deserticola: Cistanche deserticola has the effect of warming the kidney and strengthening yang, can regulate the endocrine system, and thus enhance the libido of boars. Cistanche deserticola polysaccharide can enhance the function of the immune system and improve the disease resistance of the body, thus indirectly improving the reproductive health of boars.

[0043] Among them, the method for extracting Rubus idaeus extract includes the following steps:

[0044] S101. Add pectinase at a temperature of 45°C for 1 hour to decompose pectin and the cell matrix. At this time, at 45°C, the activity of pectinase is relatively high, which can effectively decompose pectin and the cell matrix. Pectin is one of the main components in the plant cell wall. After decomposition, the structure of the cell wall becomes looser; by decomposing pectin, the active ingredients (such as flavonoids, polyphenols, etc.) in the cell matrix are more easily released into the solution, thus improving the efficiency of subsequent extraction.

[0045] S102. Raise the temperature to 55°C and add cellulase, and continue enzymatic hydrolysis for 1 hour to completely destroy the cell wall; at this stage, the temperature rises to 55°C, providing a suitable environment for the activity of cellulase. Cellulase is specifically used to decompose cellulose and further destroy the structure of the cell wall. Through the action of cellulase, the cell wall is completely destroyed, and the intracellular substances (including fat-soluble active ingredients) are more easily released into the solution.

[0046] S103. After enzymatic hydrolysis, centrifuge to obtain the supernatant and retain the soluble components in the enzymatic hydrolysate to obtain raspberry extract.

[0047] Staged enzymatic hydrolysis can specifically release different types of active ingredients, especially fat-soluble ingredients such as flavonoids and polyphenols. These ingredients are usually present in the cell wall and the cell matrix. After two-stage enzymatic hydrolysis, their dissolution rate is significantly increased.

[0048] Flavonoids and polyphenols have good antioxidant properties. Staged enzymatic hydrolysis can enhance the antioxidant capacity of the final extract by improving their extraction efficiency.

[0049] Staged enzymatic hydrolysis can effectively improve the extraction efficiency of active ingredients in plants and enhance their antioxidant capacity through reasonable temperature control and enzyme selection, providing a good foundation for the development of related products. This method not only optimizes the extraction process but also has the advantages of economy and environmental friendliness.

[0050] Apply low-frequency ultrasonic waves to the material during the enzymatic hydrolysis stage. At this time, low-frequency ultrasonic waves can promote the contact between the enzyme and the substrate and increase the reaction rate. The micro-vibration and bubble effects generated by ultrasonic waves can help the enzyme more effectively contact and decompose the substrate, and ultrasonic waves can also destroy the plant cell wall through mechanical vibration to further release the intracellular active ingredients. The combination of this physical destruction and the chemical action of the enzyme can significantly improve the extraction efficiency, and ultrasonic waves can make the extract more uniform, avoid precipitation or aggregation of components, shorten the extraction time, and thus improve the overall extraction effect.

[0051] Among them, the method for extracting desert cistanche extract includes the following steps:

[0052] After pulverizing desert cistanche with a water-cooled pulverizer (60 mesh), put it into a supercritical extraction device.

[0053] Using supercritical CO 2 (at a temperature of 50 °C, a pressure of 30 MPa, and 10% ethanol as the entrainer) for extraction for 2 h.

[0054] Deproteinize to a protein content of <5% by the Sevage method, and remove small molecule impurities by dialysis to obtain desert cistanche polysaccharide with high purity (85%).

[0055] A method for preparing a concentrated feed for improving the reproductive performance of boars, comprising the following steps:

[0056] S1. Thoroughly mix 3 kg of highly active dry yeast, 0.2 kg of Lactobacillus, 0.2 kg of Bacillus subtilis, 0.08 kg of Bifidobacterium, 5 kg of Saccharomyces cerevisiae cell wall, 0.6 kg of yeast selenium, 1.5 kg of ω-3 fatty acid (microencapsulated), and 10 kg of chaff powder. The temperature should be kept below 35 °C throughout the process to maintain activity, serving as material A;

[0057] Thoroughly mix 1.5 kg of glucomannan, 0.008 kg of chromium picolinate, 6 kg of amino acids, 3.5 kg of choline chloride, 3 kg of sodium chloride, 12 kg of organic trace element complex, 3 kg of vitamin complex, 3 kg of taurine, 2.0 kg of raspberry extract, 0.8 kg of desert cistanche extract, 3.0 kg of hypericin, 1.5 kg of betaine, and 1.5 kg of maca powder, serving as material B;

[0058] Add material A, material B, 1.2 kg of mold inhibitor, 0.3 kg of ethoxyquinoline, and the remaining chaff powder into a drum-type additive mixer, mix for 5 min and then set aside; among them, the main shaft rotation speed of the drum-type additive mixer is controlled at 12 rpm, and the coefficient of variation of the material mixing uniformity is 4% to obtain the additive components.

[0059] S2. Weigh accurately 300 kg of fermented soybean meal crushed and passed through a 400-mesh sieve, 200 kg of soybean meal, 100 kg of wheat middlings, 150 kg of expanded corn flour, 70 kg of fish meal, 25 kg of calcium hydrogen phosphate, 15 kg of clam shell powder, 50 kg of flaxseed, 15 kg of glucose, and 5 kg of chaff powder, and put them into a double-shaft paddle mixer for mixing for 30 s; then spray 15 kg of weighed soybean oil into the double-shaft paddle mixer, and add 55 kg of weighed core material additive, mix for 30 s, and the coefficient of variation of the material mixing uniformity is 7% to obtain the concentrated feed. A low coefficient of variation means that the distribution of each component in the mixture is more uniform, thereby improving the performance and quality of the final product.

[0060] Subsequently, convey the concentrated feed material mixed in S2 to a quantitative packaging scale for weighing and packaging.

[0061] Example 2:

[0062] The embodiment of the present invention provides a concentrated feed for improving the reproductive performance of boars, comprising the following components by weight: 250kg of fermented soybean meal, 220kg of soybean meal, 120kg of second-grade flour, 120kg of puffed corn flour, 60kg of fish meal, 20kg of calcium hydrogen phosphate, 10kg of clam shell powder, 25kg of flax seeds, 10kg of soybean oil, 10kg of glucose, and 50kg of additives.

[0063] The additive comprises: 2.5 kg of highly active dry yeast, 0.1 kg of lactobacillus, 0.3 kg of bacillus subtilis, 0.1 kg of bifidobacterium, 6 kg of cell wall of saccharomyces cerevisiae, 0.8 kg of yeast selenium, 2 kg of ω-3 fatty acids (microencapsulated), 2 kg of glucomannan, 0.005 kg of chromium picolinate, 3 kg of amino acids, 3 kg of choline chloride, 3 kg of sodium chloride, 10.5 kg of organic trace element complex, 2 kg of vitamin complex, 2 kg of taurine, 2.5 kg of raspberry extract, 0.5 kg of desert cistanche extract, 2.0 kg of hypericin, 1 kg of betaine and 1 kg of maca powder, 1.5 kg of mildew inhibitor, 0.4 kg of ethoxyquinoline and the remainder of bran powder.

[0064] A method for preparing a concentrated feed for improving the reproductive performance of boars comprises the following steps:

[0065] S1. 2.5 kg of highly active dry yeast, 0.1 kg of lactobacillus, 0.3 kg of Bacillus subtilis, 0.1 kg of Bifidobacterium, 6 kg of cell wall of Saccharomyces cerevisiae, 0.8 kg of yeast selenium, 2 kg of ω-3 fatty acid (microencapsulated) and 10 kg of bran powder are fully mixed. The temperature should be below 35° C. during the whole process to maintain activity, and the mixture is used as material A.

[0066] 2kg of glucomannan, 0.005kg of chromium picolinate, 3kg of amino acid, 3kg of choline chloride, 3kg of sodium chloride, 10.5kg of organic trace element complex, 2kg of vitamin complex, 2kg of taurine, 2.5kg of raspberry extract, 0.5kg of desert cistanche extract, 2.0kg of hypericin, 1kg of betaine and 1kg of maca powder are fully mixed to form material B;

[0067] Material A, material B, 1.5 kg of mildew inhibitor, 0.4 kg of ethoxyquinoline and the remaining amount of bran powder are added to a waist-drum type additive mixer and mixed for 8 minutes for use; wherein the main shaft speed of the waist-drum type additive mixer is controlled at 11 rpm, and the coefficient of variation of the mixing uniformity of the materials is 5%, thereby obtaining an additive.

[0068] S2. Weigh accurately 250 kg of fermented soybean meal, 220 kg of soybean meal, 120 kg of wheat middlings, 120 kg of expanded corn flour, 60 kg of fish meal, 20 kg of calcium hydrogen phosphate, 10 kg of clam shell powder, 25 kg of flaxseed, 10 kg of glucose, and 105 kg of chaff powder. After weighing, put them into a double-shaft paddle mixer and mix for 35 s. Then, spray 10 kg of weighed soybean oil into the double-shaft paddle mixer and add 50 kg of weighed core feed additive, and mix for 35 s. The coefficient of variation of the mixing uniformity of the materials is 6%, and a concentrated feed is obtained.

[0069] Subsequently, convey the mixed concentrated feed materials in S2 to a quantitative packaging scale for weighing and packaging.

[0070] Example 3:

[0071] The concentrated feed provided by the embodiment of the present invention for improving the reproductive performance of boars includes the following components in kg by weight: 200 kg of fermented soybean meal, 250 kg of soybean meal, 150 kg of wheat middlings, 100 kg of expanded corn flour, 55 kg of fish meal, 15 kg of calcium hydrogen phosphate, 10 kg of clam shell powder, 15 kg of flaxseed, 5 kg of soybean oil, 5 kg of glucose, and 45 kg of additive.

[0072] Among them, the components of the additive are: 3.5 kg of high-activity dry yeast, 0.3 kg of Lactobacillus, 0.1 kg of Bacillus subtilis, 0.05 kg of Bifidobacterium, 4 kg of Saccharomyces cerevisiae cell wall, 0.5 kg of yeast selenium, 1 kg of ω-3 fatty acid (microencapsulated), 1 kg of glucomannan, 0.01 kg of chromium picolinate, 8 kg of amino acids, 4 kg of choline chloride, 4 kg of sodium chloride, 8 kg of organic trace element complex, 4 kg of vitamin complex, 4 kg of taurine, 1.5 kg of raspberry extract, 1 kg of Cistanche deserticola extract, 3.5 kg of hypericin, 2 kg of betaine, 2 kg of maca powder, 1.5 kg of mold inhibitor, 0.2 kg of ethoxyquinoline, and the balance of chaff powder.

[0073] The preparation method of the concentrated feed for improving the reproductive performance of boars includes the following steps:

[0074] S1. Thoroughly mix 3.5 kg of high-activity dry yeast, 0.3 kg of Lactobacillus, 0.1 kg of Bacillus subtilis, 0.05 kg of Bifidobacterium, 4 kg of Saccharomyces cerevisiae cell wall, 0.5 kg of yeast selenium, 1 kg of ω-3 fatty acid (microencapsulated) with 10 kg of chaff powder. The temperature needs to be kept below 35°C throughout the process to maintain activity, and it is used as material A;

[0075] 1 kg of glucomannan, 0.01 kg of chromium picolinate, 8 kg of amino acids, 4 kg of choline chloride, 4 kg of sodium chloride, 8 kg of organic trace element complex, 4 kg of vitamin complex, 4 kg of taurine, 1.5 kg of raspberry extract, 1 kg of desert cistanche extract, 3.5 kg of hypericin, 2 kg of betaine and 2 kg of maca powder are fully mixed to form Feed B;

[0076] 1.0 kg of mold inhibitor, 0.2 kg of ethoxyquin and the remaining rice hull powder are added to a drum-type additive mixer and mixed for 10 min for standby; among them, the main shaft rotation speed of the drum-type additive mixer is controlled at 10 rpm, and the coefficient of variation of the material mixing uniformity is 5%, obtaining the additive component.

[0077] S2: 200 kg of fermented soybean meal, 250 kg of soybean meal, 150 kg of wheat middlings, 100 kg of expanded corn flour, 55 kg of fish meal, 15 kg of monocalcium phosphate, 10 kg of clam shell powder, 15 kg of flaxseed, 5 kg of glucose, and 150 kg of rice hull powder that are pulverized and passed through a 400-mesh sieve are accurately weighed and then put into a double-shaft paddle mixer and mixed for 30 s; then 5 kg of weighed soybean oil is sprayed into the double-shaft paddle mixer, and 45 kg of weighed core feed additive is added and mixed for 30 s. The coefficient of variation of the material mixing uniformity is 7%, obtaining the concentrated feed. A low coefficient of variation means that the components in the mixture are more evenly distributed, thus improving the performance and quality of the final product.

[0078] The usage method is: mix the concentrated feed and corn according to a weight ratio of 4:6 and feed it to boars.

[0079] Example 4:

[0080] As Control Group 1, the average ejaculate volume of boars in a certain pig farm is 70 mL. 120 Duroc boars are randomly selected and divided into a control group and an experimental group, with 3 replicates in each group.

[0081] The control group continues to use the original additive, and the experimental group replaces it with the additives of Example 1, Example 2, and Example 3 of the present invention. The feeding amount and feeding frequency are kept the same, with a basic feeding amount of 5 kg, and the specific feeding amount is adjusted according to the condition of the breeding boars. After feeding for 6 weeks, semen collection is carried out, and the semen collection volume is statistically analyzed as shown in Table 1 below.

[0082] Table 1

[0083] Group Ejaculate volume (mL) Sperm density (100 million / mL) Sperm motility (%) Sperm malformation rate Control group 1 75.8 0.91 70.26 26.34 Example 1 331.3 2.63 92.11 3.52 Example 2 321.6 2.58 91.32 3.87 Example 3 316.9 2.52 90.19 4.05

[0084] As can be seen from Table 1 above, in the experimental groups of Example 1, Example 2, and Example 3, adding the additives of the present invention can effectively increase the ejaculate volume of boars, and the sperm density and sperm motility are improved, and the sperm malformation rate is effectively reduced compared with Control Group 1.

[0085] Example 5:

[0086] As Control Group 2, that is, the body condition of the boars in a certain pig farm is normal, and the average ejaculate volume is 160 mL. 1200 Duroc boars are randomly selected and divided into Control Group 2, Experimental Group 1, Experimental Group 2, and Experimental Group 3, with 3 replicates in each group.

[0087] Control Group 2 continues to use the original concentrated feed (including the core feed additive), and Experimental Groups 1, 2, and 3 are replaced with the concentrated feeds of Examples 1, 2, and 3 of the present invention as the boars for eating feed. The feeding amount and feeding frequency are kept the same. The basic feeding amount is 5 kg, and the specific feeding amount is adjusted according to the body condition of the breeding boars. After feeding for 10 weeks, the following reproductive performances are evaluated, specifically referring to Table 2 below.

[0088] Table 2

[0089] Group Ejaculate volume (mL) Sperm density (100 million / mL) Sperm motility (%) Sperm malformation rate Control group 2 162.9 1.72 87.73 8.35 Experimental group 1 336.4 2.75 92.68 2.93 Experimental group 2 329.7 2.61 92.16 3.18 Experimental group 3 315.2 2.55 91.29 3.24

[0090] As can be seen from the above table, for the boars fed with the concentrated feed prepared by the present invention, their ejaculate volume, sperm density, and sperm motility are all improved, and the sperm malformation rate is also reduced.

[0091] In addition, the inventors of the present invention also found that in the examples, the boars fed with the concentrated feed prepared by the present invention have the following common characteristics: the boars have better libido, shiny hair, stable appetite, better physical condition, strong limbs, and no reproductive diseases are found in these boars during the feeding period.

[0092] From Example 4 to Example 5, it can be seen that the core feed additive and the concentrated feed of the present invention have remarkable effects, have a certain effect on improving the semen collection volume and semen quality of boars, and are safe and reliable. In addition, the core feed additive and the concentrated feed of the present invention have good heat stress resistance effect, and can maintain the semen collection volume and semen quality of boars stable even in hot summer.

[0093] The above shows and describes the basic principle, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed.

Claims

1. A concentrated feed for improving the reproductive performance of boars, characterized in that: The invention comprises the following components in parts by weight: 200-300 parts of fermented soybean meal, 200-250 parts of soybean meal, 100-150 parts of second flour, 100-150 parts of puffed corn flour, 55-70 parts of fish meal, 15-25 parts of calcium hydrogen phosphate, 10-15 parts of clam shell powder, 15-50 parts of flax seeds, 5-15 parts of soybean oil, 5-15 parts of glucose, 45-55 parts of additives, and the balance is carrier.

2. The concentrated feed for improving the reproductive performance of boars according to claim 1, characterized in that: The additive comprises the following components in parts by weight: Highly active dry yeast 2.0-3.5%, Lactobacillus 0.1-0.3%, Bacillus subtilis 0.1-0.3%, Bifidobacterium 0.05-0.1%, Saccharomyces cerevisiae cell wall 4-6%, Yeast selenium 0.5-0.8%, ω-3 fatty acids 1.0-2.0%, Glucomannan 1.0-2.0%, Chromium picolinate 0.005-0.01%, Amino acids 3.0-8.0%, Choline chloride 3- 4%, sodium chloride 3-4%, organic trace element complex 8-12%, vitamin complex 2-4%, taurine 2-4%, raspberry extract 1.5-2.5%, desert Cistanche extract 0.5-1.0%, hypericin 2.0-3.5%, maca powder 1.0-2.0%, betaine 1.0-2.0%, mildew inhibitor 1-1.5%, ethoxyquinoline 0.2-0.4%, and the balance is bran shell powder.

3. The concentrated feed for improving the reproductive performance of boars according to claim 2, characterized in that: The additive comprises the following components in parts by weight: 3% highly active dry yeast, 0.2% lactobacillus, 0.2% bacillus subtilis, 0.08% bifidobacterium, 5% saccharomyces cerevisiae cell wall, 0.6% yeast selenium, 1.5% ω-3 fatty acids, 1.5% glucomannan, 0.008% chromium picolinate, 6% amino acids, 3.5% choline chloride, 3% sodium chloride, 12% organic trace element complex, 3% vitamin complex, 3% taurine, 2.0% raspberry extract, 0.8% desert cistanche extract, 3.0% hypericin, 1.5% betaine, 1.5% maca powder, 1.2% mildew inhibitor, 0.3% ethoxyquinoline, and the balance is bran powder.

4. The concentrated feed for improving the reproductive performance of boars according to claim 2 or 3, characterized in that: The method for extracting the raspberry extract comprises the following steps: S101, add pectinase at 45°C for 1 hour to decompose pectin and intercellular matrix; S102, raise the temperature to 55°C, add cellulase, and continue enzymolysis for 1 hour to completely destroy the cell wall; S103, centrifuging after enzymatic hydrolysis to obtain the supernatant, retaining the soluble components in the enzymatic hydrolysis solution, and obtaining a raspberry extract. In this process, low-frequency ultrasound is applied to the material during the enzymatic hydrolysis stage.

5. The concentrated feed for improving the reproductive performance of boars according to claim 2 or 3, characterized in that: The method for extracting the desert Cistanche extract comprises the following steps: The deserticola herb is crushed by a water-cooled grinder and then put into a supercritical extraction device for extraction; Supercritical CO2 was used for extraction for 2 h, and the temperature was controlled at 50 °C, the pressure was 30 MPa, and the ethanol entrainer was 10%; The protein content was removed to less than 5%, and small molecular impurities were removed by dialysis to obtain 85% high-purity deserticola polysaccharide.

6. The method for preparing concentrated feed for improving the reproductive performance of boars according to claim 2 or 3, characterized in that: The following steps are involved: S1. The weighed high-activity dry yeast, lactobacillus, bacillus subtilis, bifidobacterium, cell wall of saccharomyces cerevisiae, yeast selenium, ω-3 fatty acids and bran shell powder are fully mixed to form material A; Fully mix glucomannan, chromium picolinate, amino acid, choline chloride, sodium chloride, organic trace element complex, vitamin complex, taurine, raspberry extract, desert Cistanche extract, hypericin, betaine and maca powder to prepare material B; Mixing material A, material B, a mildew preventer, ethoxyquinoline and the remaining amount of husk powder to obtain an additive component; S2. After accurately weighing the soybean meal, second-grade flour, puffed corn meal, fish meal, calcium hydrogen phosphate, clam shell powder, glucose, and carrier that have been crushed and passed through a 400-mesh sieve, put them into a mixer and mix them for 30 to 45 seconds, then spray the weighed soybean oil and add the weighed additives, and mix them again for 30 to 45 seconds to obtain concentrated feed.

7. The method for preparing concentrated feed for improving the reproductive performance of boars according to claim 6, characterized in that: In S1, the temperature of material A during mixing is controlled within 35°C.

8. The method for preparing concentrated feed for improving the reproductive performance of boars according to claim 4, characterized in that: The method of use is: mix the concentrated feed with corn in a weight ratio of 4:6 and feed the mixture.

9. The method for preparing concentrated feed for improving the reproductive performance of boars according to claim 6, characterized in that: In said S1, when the additive is obtained, the coefficient of variation of the mixing uniformity of the material is less than 5%; In S2, when the concentrated feed is obtained, the coefficient of variation of the mixing uniformity of the material is less than 7%.

10. The method for preparing concentrated feed for improving the reproductive performance of boars according to claim 6, characterized in that: In S1, material A, material B, mildew inhibitor, ethoxyquinoline and the remaining amount of husk powder are mixed for 5 to 10 minutes, and the rotating speed of the mixer is controlled to be 10 to 12 rpm.