Fat powder for reducing the death rate of weaned piglets, and preparation method and application thereof

Abstract

The present application relates to a kind of fat powder for reducing weaning piglet dead rate and its preparation method and application, and the composite lipid in the preparation raw material of fat powder includes 1,3-di-oleic acid-2-palmitic acid triglyceride, 24 degrees palm oil, rice bran oil, coconut oil, linseed oil, caprylic triglyceride, capric acid triglyceride, alpha-lauric acid monoglyceride and tributyrin.The present application develops the fat acid composition close to pig milk fat structure, let piglet continue lactation period in weaning period to enable approach mainly with lipid, meet the compound energy demand of fast, medium and slow, avoid falling into energy potential difference;And the specific combination of medium and short chain fatty acids, both can improve the energy efficiency of weaning piglet, also have bacteriostatic disease characteristics, can improve the immunity of piglet, reduce the diarrhea rate.This composite lipid overcomes the problem such as piglet energy deficiency and indigestion caused by single raw material oil due to unsuitable lipid structure, can significantly reduce weaning stress, reduce the diarrhea rate and dead rate.

Description

A fat powder for reducing mortality in weaned piglets, its preparation method and application Technical Field

[0001] This invention belongs to the field of pig feed technology, and relates to a fat powder that reduces the mortality rate of weaned piglets, its preparation method, and its application. Background Technology

[0002] During the weaning period, piglets encounter various stressors, such as environmental changes, feed conversions, herd reorganization, and disease infections. These stressors can affect the growth performance, immune function, and health of weaned piglets, leading to a high mortality rate. The weaning piglet mortality rate generally refers to the proportion of piglets that die or are culled within two weeks of weaning for various reasons out of the total number of weaned piglets. It is one of the important indicators for measuring the production efficiency and economic benefits of a pig farm.

[0003] To reduce mortality rates, traditional methods have included improving feed formulations, adding antibiotics or probiotics, and strengthening feeding management. However, these methods all have limitations and drawbacks. For example, feed formulations may not meet the diverse nutritional needs of weaned piglets during the stress period; adding antibiotics and probiotics can easily lead to drug resistance; and feeding management requires significant investment of manpower and resources, resulting in a low return on investment. Therefore, none of these measures can effectively solve the problem of excessively high weaning mortality rates.

[0004] Therefore, there are many technical solutions in the industry for dealing with weaning stress in piglets, but most of them focus on improving the digestibility of raw materials, using antibiotics or antibiotic alternatives, promoting gut microbiota health, providing anti-stress nutrition, and enhancing feeding management. These solutions are basically remedial measures for weaning stress that has already occurred or is about to occur, and do not address the root cause of stress caused by energy shortage during weaning. As a result, they still cannot completely solve common problems such as lethargy, stunted growth, emaciation, and high mortality rates in weaned piglets.

[0005] By analyzing the process and mechanism of weaning stress in piglets, it can be found that the main reason for the high mortality rate of weaned piglets is energy deficiency, which is caused by insufficient feed intake and mismatch between feed energy structure and other factors. At the time of weaning, piglets must switch from liquid milk to solid feed, and the form and structure of their nutrition undergo a huge change. This leads to a significant decrease in feed intake and a shortage of energy supply. In order to maintain life functions, piglets must break down their own body fat to meet their energy needs. Therefore, often three days after weaning, piglets become visibly thin, their hair grows long and they become lethargic, until they become rigor mortis or even die, greatly increasing the mortality rate.

[0006] Furthermore, studies have shown that over 60% of the energy requirements of suckling piglets are supplied by the milk fat in breast milk, with a milk fat content as high as about 8%. However, at weaning, most creep feeds cannot provide a fat structure and content similar to breast milk. The energy supply route changes from being mainly milk fat to being mainly lactose and starch. This is one of the fundamental reasons for the disorder of endogenous digestive enzymes in piglets during weaning, and also the main reason for insufficient energy intake.

[0007] In conclusion, reducing the mortality rate of weaned piglets requires addressing the issue of energy supply. Therefore, developing a novel fat powder that can fully meet the energy needs of weaned piglets and reduce mortality is of significant theoretical and practical value. Summary of the Invention

[0008] To address the shortcomings of existing technologies, the present invention aims to provide a fat powder that reduces the mortality rate of weaned piglets, its preparation method, and its application. This fat powder can be directly added to existing piglet feed, making it convenient, efficient, and highly digestible. It features increased feed intake, improved energy utilization, and enhanced disease resistance, rapidly increasing piglet vitality and reducing the mortality rate of weaned piglets, resulting in significant economic benefits.

[0009] To achieve this objective, the present invention adopts the following technical solution:

[0010] In a first aspect, the present invention provides a fat powder for reducing the mortality rate of weaned piglets. The raw materials for preparing the fat powder for reducing the mortality rate of weaned piglets include: complex lipids, sodium cholate, emulsifier, antioxidant, and carrier; the complex lipids include 1,3-dioleoyl-2-palmitoylglycerol, 24-degree palm oil, rice bran oil, coconut oil, flaxseed oil, caprylic triglyceride, capric triglyceride, α-lauric acid monoglyceride, and tribocylic acid glyceride.

[0011] This invention develops a fatty acid composition closely resembling that of porcine milk fat, allowing piglets to continue their lipid-based energy acquisition pathway during weaning, meeting their combined needs for fast, medium, and slow energy intake, and avoiding energy potential deficits. Furthermore, the specific combination of medium- and short-chain fatty acids not only improves the energy acquisition efficiency of weaned piglets but also possesses antibacterial and disease-resistant properties, enhancing their immunity and reducing diarrhea rates. This composite lipid overcomes the problems of insufficient energy acquisition and indigestion in piglets caused by mismatched lipid structures in single-source oils, significantly reducing weaning stress, diarrhea rates, and mortality.

[0012] Meanwhile, unlike traditional antibiotic alternatives that suppress pathogens, this invention organically combines various medium- and short-chain lipids with antibacterial and antiviral properties. This combination not only provides a strong antibacterial effect but also reduces the viral load of enveloped viruses such as porcine reproductive and respiratory syndrome (PRRS) in the blood, thereby reducing the occurrence of viremia. Furthermore, it can repair intestinal mucosal damage in piglets and promote the development of the immune system, building a strong immune barrier to keep viral diseases at bay and ultimately reducing mortality in weaned piglets due to disease.

[0013] Preferably, the raw materials for preparing the fat powder that reduces the mortality rate of weaned piglets include, by mass parts: 30-70 parts of complex lipids, 0.05-0.1 parts of sodium cholate, 0.1-0.5 parts of emulsifier, 1-4 parts of antioxidant, and 40-60 parts of carrier.

[0014] When the raw materials for preparing fat powder are combined in the specific mass ratios mentioned above, its effect on reducing the mortality rate of weaned piglets becomes even more pronounced.

[0015] The mass fraction of the composite lipid can be selected from 30 parts, 35 parts, 40 parts, 45 parts, 50 parts, 55 parts, 60 parts, 65 parts, 70 parts, etc.; the mass fraction of the sodium cholate can be selected from 0.05 parts, 0.06 parts, 0.07 parts, 0.08 parts, 0.09 parts, 0.1 parts, etc.; the mass fraction of the emulsifier can be selected from 0.1 parts, 0.15 parts, 0.2 parts, 0.25 parts, 0.3 parts, 0.35 parts, 0.4 parts, 0.45 parts, 0.5 parts, etc.; the mass fraction of the antioxidant can be selected from 1 part, 1.5 parts, 2 parts, 2.5 parts, 3 parts, 3.5 parts, 4 parts, etc.; the mass fraction of the carrier can be selected from 40 parts, 43 parts, 45 parts, 48 ​​parts, 50 parts, 53 parts, 55 parts, 58 parts, 60 parts, etc.

[0016] Other specific point values ​​within the range of the above values ​​can be selected, and will not be elaborated on here.

[0017] Preferably, the composite lipids, by weight, comprise 10-15 parts of 1,3-dioleoyl-2-palmitoyl glycerol (OPO structure ester), 8-12 parts of 24-degree palm oil, 5-10 parts of rice bran oil, 6-9 parts of coconut oil, 4-8 parts of flaxseed oil, 1-2 parts of caprylic triglyceride, 1-2 parts of capric triglyceride, 2-4 parts of α-lauric acid monoglyceride, and 0.5-1 parts of tribocylic acid glyceride.

[0018] Based on the synergistic relationship between the various lipid components in the composite lipid, when they are combined in the above-mentioned specific mass ratio, their effect on improving the immunity of weaned piglets and reducing the mortality rate of weaned piglets is more prominent.

[0019] The mass fractions of the 1,3-dioleoyl-2-palmitoylglycerol can be selected as 10, 11, 12, 13, 14, 15, etc.; the mass fractions of the 24-degree palm oil can be selected as 8, 9, 10, 11, 12, etc.; the mass fractions of the rice bran oil can be selected as 5, 6, 7, 8, 9, 10, etc.; the mass fractions of the coconut oil can be selected as 6, 7, 8, 9, etc.; and the mass fractions of the flaxseed oil can be selected as 4, 5, 6, 7, etc. The mass fractions of the following can be selected: 1 part, 1.2 parts, 1.4 parts, 1.5 parts, 1.7 parts, 2 parts, etc.; the mass fractions of the following can be selected: 1 part, 1.2 parts, 1.4 parts, 1.5 parts, 1.7 parts, 2 parts, etc.; the mass fractions of the following can be selected: 1 part, 1.2 parts, 1.4 parts, 1.5 parts, 1.7 parts, 2 parts, etc.; the mass fractions of the following can be selected: 2 parts, 2.5 parts, 3 parts, 3.5 parts, 4 parts, etc.; the mass fractions of the following can be selected: 0.5 parts, 0.6 parts, 0.7 parts, 0.8 parts, 0.9 parts, 1 part, etc.

[0020] Other specific point values ​​within the range of the above values ​​can be selected, and will not be elaborated on here.

[0021] Preferably, the emulsifier includes: sucrose fatty acid ester, lysophospholipid, modified phospholipid, Tween 80, and starch.

[0022] The emulsifier formulation of the above-mentioned specific formula can achieve a more significant emulsification effect on the above-mentioned specific complex lipids, that is, it is more effective in reducing the diameter of oil droplets, improving the digestibility and utilization rate of oil, and ultimately improving the immunity of weaned piglets and reducing the mortality rate of weaned piglets.

[0023] Preferably, the emulsifier comprises, by weight parts: 5-10 parts sucrose fatty acid ester, 15-20 parts lysophospholipid, 6-8 parts modified phospholipid, 10-15 parts Tween 80, and 47-64 parts starch.

[0024] The mass fractions of the sucrose fatty acid ester can be 5, 6, 7, 8, 9, 10, etc.; the mass fractions of the lysophospholipid can be 15, 17, 18, 19, 20, etc.; the mass fractions of the modified phospholipid can be 6, 6.5, 7, 7.5, 8, etc.; the mass fractions of Tween 80 can be 10, 11, 12, 13, 14, 15, etc.; and the mass fractions of the starch can be 47, 49, 50, 52, 54, 55, 57, 58, 60, 64, etc.

[0025] Other specific point values ​​within the range of the above values ​​can be selected, and will not be elaborated on here.

[0026] Preferably, the antioxidant includes licorice antioxidant, also known as licorice antioxidant or oxygen-sparing antioxidant, whose main antioxidant components are a mixture of flavonoids and flavonoids. It is a group of fat-soluble mixtures extracted from the licorice residue after extracting licorice extract or glycyrrhizic acid, and is a brown or brownish-brown powder.

[0027] Preferably, the antioxidant further includes dilauryl thiodipropionate, butylated hydroxytoluene, tert-butylhydroquinone, and a carrier material.

[0028] The antioxidant formulation of the above-mentioned specific formula can have a more significant stabilizing effect on the above-mentioned specific complex lipids, that is, it is more effective in ensuring that the oil is not easily oxidized, and ultimately improving the immunity of weaned piglets and reducing the mortality rate of weaned piglets.

[0029] Preferably, the mass ratio of dilaurate thiodipropionate, butylated hydroxytoluene, tert-butylhydroquinone to the carrier material is (8-15):(5-10):(1-3):(70-90).

[0030] The specific point values ​​in (8-15) can be selected as 8, 9, 10, 11, 12, 13, 14, 15, etc.; the specific point values ​​in (5-10) can be selected as 5, 6, 7, 8, 9, 10, etc.; the specific point values ​​in (1-3) can be selected as 1, 1.5, 2, 2.5, 3, etc.; the specific point values ​​in (70-90) can be selected as 70, 73, 75, 78, 80, 83, 85, 90, etc.

[0031] Other specific point values ​​within the range of the above values ​​can be selected, and will not be elaborated on here.

[0032] Preferably, the carrier includes any one or a combination of at least two of puffed rice flour, puffed coconut flakes, or puffed fermented soybean meal.

[0033] Preferably, the carrier includes puffed rice flour, puffed coconut flakes, and puffed fermented soybean meal.

[0034] Preferably, the carrier comprises, by weight parts, 40-50 parts of puffed rice flour, 10-20 parts of puffed coconut flakes, and 30-50 parts of puffed fermented soybean meal.

[0035] The specific carrier formula mentioned above is more suitable for piglets to digest and absorb. The combination of puffed coconut flakes and puffed fermented soybean meal can also produce a certain synergistic effect with the medium and short chain fatty acids in the complex lipids, significantly enhancing the animal's antibacterial and disease-resistant ability and vitality, and improving the immunity of piglets.

[0036] The mass fractions of the puffed rice flour can be 40, 42, 43, 44, 45, 47, 48, or 50 parts; the mass fractions of the puffed coconut flakes can be 10, 12, 14, 15, 17, 18, or 20 parts; and the mass fractions of the puffed fermented soybean meal can be 30, 32, 34, 35, 37, 38, 40, 42, 45, 47, or 50 parts.

[0037] Other specific point values ​​within the range of the above values ​​can be selected, and will not be elaborated on here.

[0038] In a second aspect, the present invention provides a method for preparing fat powder that reduces the mortality rate of weaned piglets according to the first aspect, the method comprising the following steps:

[0039] (1) Mix the complex lipids, sodium cholate, emulsifier, and antioxidant to obtain a mixture;

[0040] (2) The mixture is emulsified to obtain an emulsion;

[0041] (3) The emulsion is adsorbed onto the carrier to obtain a solid powder, namely the fat powder.

[0042] The preparation method of this fat powder is simple and easy, the raw materials are widely available, it does not contain harmful substances, has no adverse effects on piglet breeding and the environment, and it is easy to achieve industrial-scale production.

[0043] Preferably, the emulsification process in step (2) is a two-stage emulsification process. The first stage of emulsification is carried out at 3.0-5.0 MPa (e.g., 3.0 MPa, 3.5 MPa, 4.0 MPa, 4.5 MPa, 5.0 MPa, etc.) and 35,000-50,000 rpm (e.g., 35,000 rpm, 37,000 rpm, 38,000 rpm, 40,000 rpm, 42,000 rpm, 45,000 rpm, 50,000 rpm, etc.). The second stage of emulsification is carried out at 20-35 MPa (e.g., 20 MPa, 22 MPa, 24 MPa, 27 MPa, 30 MPa, 35 MPa, etc.) and 35,000-50,000 rpm (e.g., 35,000 rpm, 37,000 rpm, 38,000 rpm, 40,000 rpm, 42,000 rpm, 45,000 rpm, 50,000 rpm, etc.).

[0044] The ultra-micro emulsification homogenization pre-digestion process used in this invention can simulate the structure of milk fat to the greatest extent in terms of lipid physical form. This allows piglets to still consume energy nutrients that are close to those of breast milk fat when they are weaned, thus preventing them from falling into an energy potential difference, allowing them to smoothly transition through the weaning period, and significantly reducing the rate of stunted pigs and mortality.

[0045] Preferably, the emulsification process in step (2) is carried out at 50-65°C, such as 50°C, 52°C, 55°C, 57°C, 58°C, 60°C, 62°C, 63°C, 64°C, 65°C, etc.

[0046] Preferably, in step (3), the emulsion is mixed and adsorbed with the carrier using a spray mixer at a pressure of 18-25 MPa (e.g., 18 MPa, 19 MPa, 20 MPa, 22 MPa, 23 MPa, 25 MPa, etc.) and a spray rate of 25-35 L / min (e.g., 25 L / min, 27 L / min, 28 L / min, 30 L / min, 32 L / min, 35 L / min, etc.).

[0047] Other specific point values ​​within the range of the above values ​​can be selected, and will not be elaborated on here.

[0048] Thirdly, the present invention provides the application of the fat powder described in the first aspect for reducing the mortality rate of weaned piglets in the preparation of weaned piglet feed.

[0049] Compared with the prior art, the present invention has the following beneficial effects:

[0050] This invention uses the molecular structure of sow milk fat as a blueprint and, based on the digestion and absorption mechanism of lipids in piglets, develops a fatty acid composition that is very close to the structure of sow milk fat. By maximally mimicking the structure of sow milk fat in terms of lipid composition, piglets can still consume energy nutrients similar to those in sow milk fat even after weaning. This helps piglets avoid falling into an energy potential gap, smoothly transition to the weaning period, and significantly reduces the rate of stunted pigs and mortality. Furthermore, this composite lipid overcomes the problems of insufficient energy supply and diarrhea that are common with single-origin oils.

[0051] Meanwhile, unlike traditional antibiotic alternatives that suppress pathogens, this invention organically combines various medium- and short-chain lipids with antibacterial and antiviral properties. This combination not only provides a strong antibacterial effect but also reduces the viral load of enveloped viruses such as porcine reproductive and respiratory syndrome (PRRS) in the blood, thereby reducing the occurrence of viremia. Furthermore, it can repair intestinal mucosal damage in piglets and promote the development of the immune system, building a strong immune barrier to keep viral diseases at bay and ultimately reducing mortality in weaned piglets due to disease. Detailed Implementation

[0052] To further illustrate the technical means and effects of the present invention, the following describes the technical solution of the present invention in conjunction with preferred embodiments of the present invention. However, the present invention is not limited to the scope of the embodiments.

[0053] The lysophospholipids mentioned below are Lishubao, a product purchased from Kemin (China) Technology Co., Ltd.; the modified phospholipids are TY, a product purchased from Anhui Zhongchuang Phospholipid Technology Co., Ltd.; and the licorice antioxidants are Oxygen-Free, a product purchased from Hebei Pengyu Biotechnology Co., Ltd. All other raw materials are commercially available and routinely sourced in this field.

[0054] Preparation Example 1-1

[0055] This preparation example provides a composite emulsifier, the raw materials of which include, by mass parts, 8 parts of sucrose fatty acid ester, 18 parts of lysophospholipid, 6 parts of modified phospholipid, 12 parts of Tween 80, and 56 parts of starch.

[0056] The preparation method is as follows: accurately weigh lysophospholipids, sucrose fatty acid esters, modified phospholipids, Tween 80 and starch according to the formula, and put them into a V-type high-efficiency mixer in sequence. Mix them evenly for 6 minutes at a speed of 80 rpm, and then take them out to obtain the emulsifier.

[0057] Preparation Examples 1-2

[0058] This preparation example provides a composite emulsifier whose raw materials differ from those in Preparation Example 1-1 only in that it lacks sucrose fatty acid esters and has 20 parts by mass of Tween 80, while other components and their proportions remain unchanged.

[0059] The preparation method is as follows: accurately weigh lysophospholipids, modified phospholipids, Tween 80 and starch according to the formula, and put them into a V-type high-efficiency mixer in sequence. Mix them evenly for 6 minutes at a speed of 80 rpm, and then take them out to obtain the emulsifier.

[0060] Preparation Examples 1-3

[0061] This preparation example provides a composite emulsifier whose raw materials differ from those in Preparation Example 1-1 only in that it lacks Tween 80 and has a mass fraction of 20 parts of sucrose fatty acid ester, while the other components and their fractions remain unchanged.

[0062] The preparation method is as follows: accurately weigh lysophospholipids, modified phospholipids, sucrose fatty acid esters and starch according to the formula, and put them into a V-type high-efficiency mixer in sequence. Mix them evenly for 6 minutes at a speed of 80 rpm, and then take them out to obtain the emulsifier.

[0063] Preparation Example 2

[0064] This preparation example provides a composite antioxidant, the raw materials of which, by weight, include 8 parts of butylated hydroxytoluene (BHT), 2 parts of tert-butylhydroquinone (TBHQ), 10 parts of dilauryl thiodipropionate (DLTP), and 80 parts of silica (carrier).

[0065] The preparation method is as follows: After accurately weighing dibutylhydrotoluene (BHT), tert-butylhydroquinone (TBHQ), dilaurate thiodipropionate (DLTP) and silica, they are put into a V-type high-efficiency mixer and mixed evenly for 6 minutes at a speed of 80 rpm. The antioxidant is then obtained.

[0066] Example 1

[0067] This embodiment provides a fat powder, the raw materials for which, by mass parts, include:

[0068] 13 parts of 1,3-dioleoyl-2-palmitoyl triglyceride, 11 parts of 24-degree palm oil, 8 parts of rice bran oil, 7 parts of coconut oil, 6 parts of linseed oil, 2 parts of caprylic triglyceride, 1 part of capric triglyceride, 3 parts of α-lauric acid monoglyceride, 0.5 parts of tributyric acid glyceride, 2 parts of licorice antioxidant, 0.1 parts of sodium cholate, 0.2 parts of the composite emulsifier prepared in Preparation Example 1-1, 0.1 parts of the composite antioxidant prepared in Preparation Example 2, and 50 parts of the composite carrier (composed of puffed rice flour, puffed coconut flakes, and puffed fermented soybean meal in a mass ratio of 4:1:3).

[0069] The preparation method is as follows:

[0070] (1) Mix 1,3-dioleoyl-2-palmitoyl triglyceride, 24-degree palm oil, rice bran oil, coconut oil, flaxseed oil, caprylic triglyceride, capric triglyceride, α-lauric acid monoglyceride, tribolic acid glyceride, and licorice antioxidant evenly, then add sodium cholate, compound emulsifier and compound antioxidant, and fully dissolve and mix.

[0071] (2) Then the temperature is raised to 50°C and a two-stage emulsification process is carried out under the action of a high-speed shear homogenizer. The first stage of emulsification is carried out at 4.0 MPa and 40,000 rpm, and the second stage of emulsification is carried out at 30 MPa and 40,000 rpm.

[0072] (3) The obtained emulsion (the oil droplets in which the diameter can be found to be between 1-2 μm by microscopic observation) is mixed and adsorbed with the composite carrier by a spray mixer to form a solid powder. The pressure is 25 MPa and the spraying speed is 30 liters / minute to obtain the fat powder.

[0073] Example 2

[0074] This embodiment provides a fat powder, the raw materials for which, by mass parts, include:

[0075] 11 parts of 1,3-dioleoyl-2-palmitoyl triglyceride, 12 parts of 24-degree palm oil, 9 parts of rice bran oil, 6 parts of coconut oil, 7 parts of flaxseed oil, 1 part of caprylic triglyceride, 2 parts of capric triglyceride, 2.5 parts of α-lauric acid monoglyceride, 1 part of tributyric acid glyceride, 1 part of licorice antioxidant, 0.05 parts of sodium cholate, 0.4 parts of the composite emulsifier prepared in Preparation Example 1-1, 0.2 parts of the composite antioxidant prepared in Preparation Example 2, and 55 parts of the composite carrier (composed of puffed rice flour, puffed coconut flakes, and puffed fermented soybean meal in a mass ratio of 5:2:5).

[0076] The preparation method is as follows:

[0077] (1) Mix 1,3-dioleoyl-2-palmitoyl triglyceride, 24-degree palm oil, rice bran oil, coconut oil, flaxseed oil, caprylic triglyceride, capric triglyceride, α-lauric acid monoglyceride, tribolic acid glyceride, and licorice antioxidant evenly, then add sodium cholate, compound emulsifier and compound antioxidant, and fully dissolve and mix.

[0078] (2) Then the temperature is raised to 55°C and a two-stage emulsification process is carried out under the action of a high-speed shear homogenizer. The first stage of emulsification is carried out at 5.0 MPa and 30,000 rpm, and the second stage of emulsification is carried out at 25 MPa and 45,000 rpm.

[0079] (3) The obtained emulsion (the oil droplets in which the diameter can be found to be between 1-2 μm by microscopic observation) is mixed and adsorbed with the composite carrier by a spray mixer to form a solid powder. The pressure is 20 MPa and the spraying speed is 25 liters / minute to obtain the fat powder.

[0080] Examples 3-4

[0081] This embodiment provides two types of fat powders. The only difference between the raw materials used in preparation and those in Example 1 is that the composite emulsifier in Preparation Example 1-1 is replaced in equal amounts with the composite emulsifiers obtained in Preparation Examples 1-2 and 1-3, respectively. All other components and their contents remain unchanged. The preparation method is the same as in Example 1.

[0082] Example 5

[0083] This embodiment provides a fat powder whose raw materials differ from those in Example 1 only in that the composite carrier lacks puffed coconut flakes, and the reduced portion is allocated to puffed fermented soybean meal, while other components and their contents remain unchanged. The preparation method is the same as in Example 1.

[0084] Example 6

[0085] This embodiment provides a fat powder whose raw materials differ from those in Example 1 only in that the composite carrier lacks puffed fermented soybean meal, and the reduced portion is allocated to puffed coconut flakes, while other components and their contents remain unchanged. The preparation method is the same as in Example 1.

[0086] Comparative Example 1

[0087] This comparative example provides a fat powder whose raw materials differ from those in Example 1 only in the absence of 1,3-dioleoyl-2-palmitoylglycerol. The reduced mass of 1,3-dioleoyl-2-palmitoylglycerol is proportionally allocated to the mass of 24-degree palm oil, rice bran oil, coconut oil, and flaxseed oil, while other components and contents remain unchanged. The preparation method is the same as in Example 1.

[0088] Comparative Example 2

[0089] This comparative example provides a fat powder whose raw materials differ from those in Example 1 only in the absence of 24-degree palm oil. The reduced mass of palm oil is proportionally allocated to the mass of 1,3-dioleoyl-2-palmitoylglycerol, rice bran oil, coconut oil, and flaxseed oil, while other components and their contents remain unchanged. The preparation method is the same as in Example 1.

[0090] Comparative Example 3

[0091] This comparative example provides a fat powder whose raw materials differ from those in Example 1 only in the absence of rice bran oil. The reduced mass of rice bran oil is proportionally allocated to the mass of 24° palm oil, 1,3-dioleoyl-2-palmitoylglycerol triglyceride, coconut oil, and flaxseed oil, while other components and their contents remain unchanged. The preparation method is the same as in Example 1.

[0092] Comparative Example 4

[0093] This comparative example provides a fat powder whose raw materials differ from those in Example 1 only in the absence of coconut oil. The reduced mass of coconut oil is proportionally allocated to the mass of 24° palm oil, rice bran oil, 1,3-dioleoyl-2-palmitoylglycerol triglyceride, and flaxseed oil, while other components and contents remain unchanged. The preparation method is the same as in Example 1.

[0094] Comparative Example 5

[0095] This comparative example provides a fat powder whose raw materials differ from those in Example 1 only in the absence of flaxseed oil. The reduced mass of flaxseed oil is proportionally allocated to the mass of 24° palm oil, rice bran oil, coconut oil, and 1,3-dioleoyl-2-palmitoylglycerol triglyceride, while other components and contents remain unchanged. The preparation method is the same as in Example 1.

[0096] Comparative Example 6

[0097] This comparative example provides a fat powder whose raw materials differ from those in Example 1 only in the absence of caprylic triglyceride and capric triglyceride. The reduced mass of these components is proportionally allocated to the mass of α-lauric acid monoglyceride and tributyric acid glyceride, while other components and their contents remain unchanged. The preparation method is the same as in Example 1.

[0098] Comparative Example 7

[0099] This comparative example provides a fat powder whose raw materials differ from those in Example 1 only in the absence of α-lauric acid monoglyceride and tributyric acid glyceride. The reduced mass of these ingredients is proportionally allocated to the mass of caprylic triglyceride and capric triglyceride, while other components and their contents remain unchanged. The preparation method is the same as in Example 1.

[0100] Comparative Example 8

[0101] This comparative example provides a fat powder whose raw materials differ from those in Example 1 only in the absence of caprylic triglyceride, caprylic triglyceride, α-lauric acid monoglyceride, and tribocylic acid triglyceride. The reduced mass of these components is proportionally allocated to the mass of 1,3-dioleoyl-2-palmitoyl triglyceride, 24-degree palm oil, rice bran oil, coconut oil, and flaxseed oil, while other components and their contents remain unchanged. The preparation method is the same as in Example 1.

[0102] Comparative Example 9

[0103] This comparative example provides a fat powder whose raw materials differ from those in Example 1 only in the absence of 1,3-dioleoyl-2-palmitoyl triglyceride, 24-degree palm oil, rice bran oil, coconut oil, and flaxseed oil. The reduced mass of these ingredients is proportionally allocated to the mass of caprylic triglyceride, capric triglyceride, α-lauric acid monoglyceride, and tributyric acid triglyceride, while other components and their contents remain unchanged. The preparation method is the same as in Example 1.

[0104] Test case

[0105] The experiment employed a single-factor design and lasted 14 days. 320 Duroc-Grandson Landrace crossbred piglets of similar weight at 25 days of age were randomly divided into 16 groups of 20 piglets each (half male, half female). The control group was fed creep feed containing 2% soybean oil. Experimental groups 1-15 were fed a creep feed with the soybean oil removed, but with an equal amount of 2% of the fat powder prepared in Examples 1-6 and Comparative Examples 1-9 of this invention added. Free access to feed and water was provided. Pig house temperature, humidity, and light were controlled according to standard experimental farm procedures. Disease prevention was carried out according to standard experimental farm procedures. The condition of the piglets was observed and recorded; any diseases were treated promptly and the results were documented. At the start of the experiment, the initial weight of the piglets was measured, and daily feed intake was recorded. At the end of the experiment, the final weight was measured, and the feed conversion ratio was calculated. The number of times piglets experienced diarrhea and the number of deaths were recorded throughout the experiment. The results are shown in the table below.

[0106]

[0107] As can be seen from the data in the table above, the fat powder product involved in this invention has excellent effects in improving the growth performance of piglets, enhancing their immunity, and reducing their mortality rate. Furthermore, the components in the compound lipid have a significant synergistic effect in promoting these effects.

[0108] The applicant declares that the technical solution of this invention is illustrated by the above embodiments, but this invention is not limited to the above embodiments, that is, it does not mean that this invention must rely on the above embodiments to be implemented. Those skilled in the art should understand that any improvements to this invention, equivalent substitutions of raw materials for the products of this invention, addition of auxiliary components, selection of specific methods, etc., all fall within the protection scope and disclosure scope of this invention.

[0109] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0110] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not describe the various possible combinations separately.

Claims

1. A fat powder that reduces mortality in weaned piglets, characterized in that, The raw materials for preparing the fat powder that reduces the mortality rate of weaned piglets include: complex lipids, sodium cholate, emulsifiers, antioxidants, and a carrier; the complex lipids, by weight, consist of 10-15 parts of 1,3-dioleoyl-2-palmitoyl glycerol, 8-12 parts of 24-degree palm oil, 5-10 parts of rice bran oil, 6-9 parts of coconut oil, 4-8 parts of flaxseed oil, 1-2 parts of caprylic acid triglyceride, 1-2 parts of capric acid triglyceride, 2-4 parts of α-lauric acid monoglyceride, and 0.5-1 parts of tributyric acid glyceride; the emulsifier, by weight, consists of 5-10 parts of sucrose fatty acid ester, 15-20 parts of lysophospholipids, 6-8 parts of modified phospholipids, and Tween 80. 10-15 parts of starch and 47-64 parts of extruded rice flour; the carrier, by weight, is: 40-50 parts of extruded rice flour, 10-20 parts of extruded coconut flakes and 30-50 parts of extruded fermented soybean meal.

2. The fat powder for reducing mortality in weaned piglets according to claim 1, characterized in that, The raw materials for preparing the fat powder that reduces the mortality rate of weaned piglets include, by mass parts: 30-70 parts of complex lipids, 0.05-0.1 parts of sodium cholate, 0.1-0.5 parts of emulsifier, 1-4 parts of antioxidant, and 40-60 parts of carrier.

3. The fat powder for reducing mortality in weaned piglets according to claim 1, characterized in that, The antioxidants include licorice antioxidants.

4. The fat powder for reducing mortality in weaned piglets according to claim 3, characterized in that, The antioxidants also include dilaurate thiodipropionate, butylated hydroxytoluene, tert-butylhydroquinone, and a carrier material.

5. The fat powder for reducing mortality in weaned piglets according to claim 4, characterized in that, The mass ratio of dilaurate thiodipropionate, butylated hydroxytoluene, tert-butylhydroquinone to the carrier material is (8-15):(5-10):(1-3):(70-90).

6. The method for preparing fat powder for reducing mortality rate of weaned piglets according to any one of claims 1-5, characterized in that, The preparation method includes the following steps: (1) mixing the compound lipid, sodium cholate, emulsifier and antioxidant to obtain a mixture; (2) emulsifying the mixture to obtain an emulsion; (3) adsorbing the emulsion onto a carrier to obtain a solid powder, namely the fat powder.

7. The method for preparing fat powder to reduce mortality rate in weaned piglets according to claim 6, characterized in that, The emulsification process in step (2) is a two-stage emulsification process. The first stage of emulsification is carried out at 3.0-5.0 MPa and 35,000-50,000 rpm, and the second stage of emulsification is carried out at 20-35 MPa and 35,000-50,000 rpm.

8. The method for preparing fat powder to reduce mortality rate in weaned piglets according to claim 6, characterized in that, The emulsification process described in step (2) is carried out at 50-65°C.

9. The method for preparing fat powder to reduce mortality rate in weaned piglets according to claim 6, characterized in that, Step (3) The emulsion is mixed and adsorbed with the carrier through a spray mixer at a pressure of 18-25 MPa and a spraying speed of 25-35 L / min.

10. The use of the fat powder that reduces the mortality rate of weaned piglets according to any one of claims 1-5 in the preparation of weaned piglet feed.

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