Low-fat feed for breeding low-fat fish and preparation method of low-fat feed

Abstract

The invention discloses a low-fat feed for culturing low-fat fish and a preparation method of the low-fat feed. The feed comprises the following components in parts by weight: 100-150 parts of low-fat fish meal, 40-100 parts of a lipid-lowering material, 30-60 parts of a vegetable protein raw material, 20-70 parts of a starch raw material, 5-13 parts of vitamin B1, 5-20 parts of aquatic trace elements, 2-10 parts of dietary fibers, 5-10 parts of functional enzymes, 5-10 parts of antibacterial peptides, 4-10 parts of a water quality improver, 1-3 parts of zeolite powder, 5-10 parts of bile acid and 5-10 parts of selenium yeast. The low-fat fish feed disclosed by the invention does not contain animal oil and vegetable oil, the low-fat fish can well digest and absorb the low-fat feed, the utilization rate of the low-fat feed is high, and the stability of the water quality of an aquaculture water body is facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of low-fat fish feed, in particular to a low-fat feed for low-fat fish breeding and a preparation method thereof. Background Art

[0002] Low-fat fish farming usually refers to a farming method that reduces the fat content of fish through specific methods. This kind of fish is often called "slimming fish" in the market. Low-fat fish farming refers to placing commercial fish with thick abdomen and excessive body fat raised in conventional ponds into high-quality clean water sources, and starving them for several months through dieting or fasting to achieve rapid weight loss and significantly reduced fat content. This process is essentially to reduce the food intake of fish and force them to consume the fat stored in the body, thereby achieving the purpose of reducing fat content, improving appearance and improving quality. Although this method can reduce the fat content of farmed fish, it affects the output of artificial breeding and economic income. Therefore, there is an urgent need for a low-fat feed to be used in fish farming.

[0003] Existing low-fat fish feeds are all added with animal oils, such as fish oil, such as soybean oil. Chinese invention patent CN103931897B discloses a feed additive and preparation method for reducing the body fat content of freshwater fish, and its ingredients include soybean oil. Chinese invention patent CN106071384A discloses a feed additive for reducing the fat content of haddock and its preparation method, and its ingredients include animal oil, and the animal oil is lard. Chinese invention patent CN106974135A discloses a freshwater fish feed additive for reducing fat content and its preparation method, and its ingredients include corn germ oil. In addition, when using low-fat fish feed to breed fish, there is no way to guarantee the water quality environment for breeding low-fat fish. It needs to be cleaned manually regularly, and the palatability of the feed is greatly affected, which makes it difficult to meet the current low-fat fish breeding needs. Summary of the invention

[0004] The purpose of the present invention is to provide a low-fat feed for low-fat fish farming, so as to solve the problems proposed in the above background technology that the low-fat fish feed contains animal oil and vegetable oil, the low-fat fish has poor digestion and absorption of the low-fat feed, the utilization rate of the low-fat feed is low, the farming water body needs to be frequently cleaned manually, which is not conducive to the stability of water quality and the water quality cannot be guaranteed.

[0005] To achieve the above-mentioned purpose, the purpose of the present invention is to provide the following technical scheme, a low-fat feed for low-fat fish farming, wherein the components by weight include: low-fat fish meal: 100-150 parts, lipid-reducing feed: 40-100 parts, vegetable protein raw material: 30-60 parts, starch raw material: 20-70 parts, vitamin B1: 5-13 parts, aquatic trace elements: 5-20 parts, dietary fiber: 2-10 parts, functional enzymes: 5-10 parts, antimicrobial peptides: 5-10 parts, water quality improver: 4-10 parts, zeolite powder: 1-3 parts, bile acid: 5-10 parts, yeast selenium: 5-10 parts.

[0006] Preferably, the lipid-lowering material is chrysophanol or rhamnosine, and the plant protein raw material is a mixture of one or more of soybean, pea and linseed meal.

[0007] Preferably, the starch raw material is a mixture of corn, wheat and wheat bran.

[0008] Preferably, the aquatic trace elements are zinc, iron and selenium, which are added to the feed in the form of zinc sulfate, ferrous sulfate and sodium selenite, respectively.

[0009] Preferably, the dietary fiber is a mixture of one or more of pectin, lignin and oligosaccharides.

[0010] Preferably, the functional enzyme is a mixture of digestive enzymes and metabolic enzymes, and the water quality improver is sodium humate.

[0011] Preferably, the low-fat fish is one or more of tilapia, cuttlefish, cod and flounder.

[0012] The present invention also provides a method for preparing a low-fat feed for low-fat fish farming, comprising the following steps:

[0013] S1, weighing low-fat fish meal, dietary fiber and zeolite, crushing and sieving the zeolite, and then mixing the low-fat fish meal, dietary fiber and crushed zeolite to obtain material No. 1;

[0014] S2. Weigh a lipid-lowering material and vitamin B1, mix the lipid-lowering material and vitamin B1, and then let it stand for 2-4 hours, stirring 5-10 times during the period, to obtain an auxiliary material;

[0015] S3, weighing a vegetable protein raw material and a starch raw material, washing the vegetable protein raw material and the starch raw material, drying the vegetable protein raw material and the starch raw material after washing, crushing the raw material by a crusher after drying, and sieving the crushed material through 30-60 mesh to obtain material No. 2;

[0016] S4. Place the No. 2 powder in a high temperature box and kill microorganisms by high temperature heat treatment. The high temperature sterilization temperature is 75-90°C and the sterilization time is 1-2h;

[0017] S5. Weigh aquatic trace elements, mix material No. 1 and material No. 2, then pour the auxiliary materials and aquatic trace elements into the stirring device, pour material No. 1 and material No. 2 into the stirring device and mix them together, stir at a speed of 500-700 r / min for 5-10 min to obtain a mixture;

[0018] S6. Weigh the functional enzyme, antimicrobial peptide, and bile acid, and mix them according to the ratio of the formula to obtain a stirring material;

[0019] S7, filtering the stirred material in step S6 to obtain a clarified filtrate and a filter residue, repeatedly extracting the filter residue 3-5 times, and combining the filtrates to obtain a filtrate;

[0020] S8. Weigh a water quality improver and yeast selenium, mix the mixture and the stirring material evenly, then pour in the water quality improver and yeast selenium, mix evenly and pour into an extrusion granulator for granulation, and dry at low temperature to obtain a low-fat feed for low-fat fish farming.

[0021] Preferably, the step S1 of weighing low-fat fish meal, dietary fiber and zeolite, crushing and sieving the zeolite, and then mixing the low-fat fish meal, dietary fiber and crushed zeolite to obtain material No. 1 specifically comprises the following steps:

[0022] S11, weighing low-fat fish meal, dietary fiber and zeolite, and mixing the low-fat fish meal with the dietary fiber;

[0023] S12, crushing the zeolite until the proportion of the material passing through a 40-mesh sieve is more than 50%, thereby obtaining zeolite powder;

[0024] S13, then mix the zeolite powder, low-fat fish meal and dietary fiber again to obtain material No. 1.

[0025] Preferably, the weighing of the functional enzyme, the antimicrobial peptide, and the bile acid in step S6, and mixing them in proportion to obtain the stirring material specifically comprises the following steps:

[0026] S61, weighing functional enzymes, antimicrobial peptides, and bile acid, and then mixing the functional enzymes, antimicrobial peptides, and bile acid in a mass ratio of 1:1:1-2;

[0027] S62, mixing by a stirring device, stirring at a speed of 500-800 r / min for 3-6 hours to obtain a stirring material.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] The present invention provides a low-fat feed for low-fat fish farming. By adding dietary fiber into the feed, the dietary fiber is one of pectin, lignin, and oligosaccharides or a mixture of multiple thereof, which helps to increase the amount of microorganisms in the intestine and promote the balance of intestinal flora, which is crucial for improving the digestive ability and immunity of fish, reducing the accumulation of harmful substances in the intestine, reducing the risk of intestinal diseases, and having a good effect on low-fat fish farming. By adding functional enzymes and water quality improvers into the feed, the functional enzymes are a mixture of digestive enzymes and metabolic enzymes, and the functional enzymes are added when low-fat fish are farmed. At the same time, by adding zeolite powder, the digestive tract of fish can be stimulated by physical stimulation: zeolite powder has a rough surface and a porous structure. When these particles enter the digestive tract of fish with the feed, they will produce a certain physical friction effect on the wall of the digestive tract. The porous structure of zeolite powder can adsorb and fix some microorganisms that are beneficial to fish, such as probiotics. These probiotics can produce beneficial metabolites in the digestive tract, such as digestive enzymes, vitamins, etc., which further promote the digestion and absorption of fish; promote the secretion of digestive juices, increase the thickness of intestinal mucosa and the degree of development of intestinal glands; by adding vitamin B1, vitamin B1 has a significant appetizing and digestive effect, can promote the digestion and absorption of feed by fish, and improve the utilization rate of feed. When fish lack vitamin B1, a series of deficiency symptoms appear, such as poor growth and development, loss of appetite, and indigestion. In addition, the low-fat fish feed of the present invention does not contain animal oil and vegetable oil, and low-fat fish meal is used to replace conventional fish meal, with low lipid content, low-fat fish digestion and absorption of low-fat feed is good, the utilization rate of low-fat feed is high, it is conducive to the stability of water quality of aquaculture water, and the fat content of aquacultured low-fat fish is low. DETAILED DESCRIPTION

[0030] The invention provides a technical solution: a low-fat feed for low-fat fish breeding, wherein the components include, by weight: 100-150 parts of low-fat fish meal, 40-100 parts of fat-reducing feed, 30-60 parts of vegetable protein raw materials, 20-70 parts of starch raw materials, 5-13 parts of vitamin B1, 5-20 parts of aquatic trace elements, 2-10 parts of dietary fiber, 5-10 parts of functional enzymes, 5-10 parts of antimicrobial peptides, 4-10 parts of water quality improvers, 1-3 parts of zeolite powder, 5-10 parts of bile acid and 5-10 parts of yeast selenium.

[0031] Among them, the lipid-lowering material is chrysophanol or rhamnosin, and the plant protein raw material is a mixture of one or more soybeans, peas, and linseed meal. The plant protein raw material plays a role in fish feed in replacing fish meal, reducing costs, providing nutrition, improving feed quality, promoting digestion and absorption, and protecting the environment and sustainability.

[0032] Wherein, the starch raw material is a mixture of corn, wheat and wheat bran.

[0033] Among them, the aquatic trace elements are zinc, iron and selenium, which are added to the feed in the form of zinc sulfate, ferrous sulfate and sodium selenite respectively; they work together to affect the growth, health, immunity and environmental adaptability of fish, providing a strong guarantee for the healthy breeding of fish.

[0034] The dietary fiber is a mixture of one or more of pectin, lignin and oligosaccharides, which together promote the healthy growth of fish and improve the breeding efficiency.

[0035] Wherein, the functional enzyme is a mixture of digestive enzymes and metabolic enzymes, and the water quality improver is sodium humate.

[0036] Soybeans: Soybeans are a protein-rich plant-based food with a very high protein content, usually between 35-40%. Soy protein is widely used in the food industry, including as a meat substitute, protein supplement and feed ingredient.

[0037] Pea: Pea is also a good source of plant-based protein, with a protein content of about 20-25%. Pea protein has become increasingly popular in recent years and is used in a variety of food and beverage products, including sports nutrition and vegetarian products.

[0038] Flaxseed meal (also called flaxseed cake or flaxseed meal): Flaxseed meal is the byproduct left after flaxseed is pressed to extract flax oil. Its protein content is about 30-40%. Flaxseed meal not only contains protein, but also rich in fiber and other nutrients.

[0039] Pectin: Pectin is a polysaccharide naturally found in fruits and vegetables and is a soluble dietary fiber. It can increase the viscosity of intestinal contents and help improve intestinal function.

[0040] Lignin: Lignin is a complex organic polymer that mainly exists in plant cell walls. It is one of the main components of plant cell walls and is an insoluble dietary fiber.

[0041] Oligosaccharides: Oligosaccharides (or oligosaccharides) are carbohydrates formed by a small number of monosaccharide molecules connected by glycosidic bonds, including oligofructose, oligogalactose, etc. They cannot be digested and absorbed in the human digestive system and are soluble dietary fiber.

[0042] Resistant starch: Resistant starch refers to starch and its degradation products that are not digested and absorbed in the small intestine. They can enter the large intestine and be fermented by microorganisms there. They are insoluble dietary fiber.

[0043] Dietary fibers are very important to human health. They help maintain intestinal health, reduce cholesterol absorption, etc.

[0044] The actual effects of sodium humate are as follows:

[0045] Fertilizer water: Sodium humate has a high carbon content and can be used as a carbon source fertilizer to stimulate the rapid reproduction of algae and to fertilize water to avoid eutrophication of water bodies.

[0046] Purify water quality: Sodium humate has the ability of adsorption, exchange, complexation and chelation. It can adsorb organic matter and suspended matter in water, chelate heavy metal ions, and oxidize toxic substances in water, such as ammonia nitrogen, hydrogen sulfide, etc.

[0047] Physical shading: After applying sodium humate, the water color becomes darker and the transparency decreases, which can block part of the sunlight and prevent the growth of moss.

[0048] Chelating heavy metal ions: The surface of sodium humate has a large negative charge and can react with heavy metal ions in water to reduce the harm of heavy metal ions to farmed animals.

[0049] Improve feed conversion rate: Adding sodium humate to aquatic feed can improve feed utilization and feed conversion rate, accelerate growth rate, and improve disease resistance of farmed animals.

[0050] The functions of bile acids are as follows:

[0051] Promote the emulsification, digestion and absorption of fat: Bile acid can activate lipase, improve the utilization and conversion rate of fat in feed by fish, and reduce the feed conversion rate.

[0052] Reduce excessive fat accumulation: Bile acid can accelerate the conversion of fat into fatty acids and export them from the liver to muscle tissue, reduce excessive fat accumulation in the liver and abdominal cavity, and prevent fish fatty liver

[0053] A method for preparing a low-fat feed for low-fat fish farming, characterized in that it comprises the following steps:

[0054] S1, weighing low-fat fish meal, dietary fiber and zeolite, crushing and sieving the zeolite, and then mixing the low-fat fish meal, dietary fiber and crushed zeolite to obtain material No. 1;

[0055] S2. Weigh a lipid-lowering material and vitamin B1, mix the lipid-lowering material and vitamin B1, and then let it stand for 2-4 hours, stirring 5-10 times during the period, to obtain an auxiliary material;

[0056] S3, weighing a vegetable protein raw material and a starch raw material, washing the vegetable protein raw material and the starch raw material, drying the vegetable protein raw material and the starch raw material after washing, crushing the raw material by a crusher after drying, and sieving the crushed material through 30-60 mesh to obtain material No. 2;

[0057] S4. Place the No. 2 powder in a high temperature box and kill microorganisms by high temperature heat treatment. The high temperature sterilization temperature is 75-90°C and the sterilization time is 1-2h;

[0058] S5. Weigh aquatic trace elements, mix material No. 1 and material No. 2, then pour the auxiliary materials and aquatic trace elements into the stirring device, pour material No. 1 and material No. 2 into the stirring device and mix them together, stir at a speed of 500-700 r / min for 5-10 min to obtain a mixture;

[0059] S6. Weigh the functional enzyme, antimicrobial peptide, and bile acid, and mix them in proportion to obtain a stirring material;

[0060] S7, filtering the stirred material in S6 to obtain a clarified filtrate and a filter residue, repeatedly extracting the filter residue 3-5 times, and combining the filtrates to obtain a filtrate;

[0061] S8. Weigh a water quality improver and yeast selenium, mix the mixture and the stirring material evenly, then pour in the water quality improver and yeast selenium, mix evenly and pour into an extrusion granulator for granulation, and dry at low temperature to obtain a low-fat feed for low-fat fish farming.

[0062] The step of weighing low-fat fish meal, dietary fiber and zeolite in S1, crushing and sieving the zeolite, and then mixing the low-fat fish meal, dietary fiber and crushed zeolite to obtain material No. 1 specifically comprises the following steps:

[0063] S11, weighing low-fat fish meal, dietary fiber and zeolite, and mixing the low-fat fish meal with the dietary fiber;

[0064] S12, crushing the zeolite until the proportion of the material passing through a 40-mesh sieve is more than 50%, thereby obtaining zeolite powder;

[0065] S13, then mixing the zeolite powder, low-fat fish meal and dietary fiber again to obtain material No. 1;

[0066] Zeolite powder can stimulate the digestive tract of fish through physical stimulation: zeolite powder has a rough surface and porous structure. When these particles enter the digestive tract of fish with feed, they will produce a certain physical friction effect on the wall of the digestive tract; chemical stimulation: certain components in zeolite powder (such as metal cations) may act as catalysts in the digestive tract, participate in chemical reactions in the digestive process, and increase the activity of digestive enzymes; biological stimulation: the porous structure of zeolite powder can adsorb and fix some microorganisms that are beneficial to fish, such as probiotics. These probiotics can produce beneficial metabolites in the digestive tract, such as digestive enzymes, vitamins, etc., which further promote the digestion and absorption of fish; promote the secretion of digestive juices, increase the thickness of intestinal mucosa and the development of intestinal glands, thereby improving the digestion and absorption capacity of fish for nutrients and reducing the feed coefficient.

[0067] The weighing of the functional enzyme, antimicrobial peptide, and bile acid in S6 and mixing them in proportion to obtain a stirring material specifically comprises the following steps:

[0068] S61, weighing functional enzymes, antimicrobial peptides, and bile acid, and then mixing the functional enzymes, antimicrobial peptides, and bile acid in a mass ratio of 1:1:1-2;

[0069] S62, mixing by a stirring device, stirring at a speed of 500-800 r / min for 3-6 hours to obtain a stirring material.

[0070] Example 1

[0071] The present embodiment provides a low-fat feed for low-fat fish farming, and the components are calculated by weight: low-fat fish meal: 100 parts, lipid-lowering material chrysophanol: 40 parts, soybeans: 30 parts, starch raw material corn: 20 parts, vitamin B1: 5 parts, aquatic trace elements: 5 parts, dietary fiber oligosaccharides: 2 parts, functional enzymes: 5 parts, antimicrobial peptides: 5 parts, sodium humate: 4 parts, zeolite powder: 1 part, bile acid: 5 parts, yeast selenium: 5 parts. In this embodiment, the aquatic trace elements are zinc, iron, and selenium, which are added to the feed in the form of zinc sulfate, ferrous sulfate, and sodium selenite, respectively, with a total mass of 5 parts. As shown in Table 1.

[0072] Table 1

[0073]

[0074] This embodiment also provides a method for preparing a low-fat feed for low-fat fish farming, comprising the following steps:

[0075] S1, weighing low-fat fish meal, oligosaccharides and zeolite, mixing the low-fat fish meal with dietary fiber oligosaccharides, crushing the zeolite until the proportion of materials passing through a 40-mesh sieve is more than 50%, to obtain zeolite powder, and then mixing the zeolite powder, low-fat fish meal and dietary fiber oligosaccharides again to obtain material No. 1;

[0076] S2, weighing chrysophanol and vitamin B1, mixing the lipid-lowering material chrysophanol and vitamin B1, and then letting them stand for 2 hours, stirring them 5 times, to obtain an auxiliary material;

[0077] S3, weighing soybeans and corn as starch raw materials, washing the soybeans and corn as starch raw materials, drying the soybeans and corn as starch raw materials after washing, crushing the raw materials by a crusher after drying, and sieving the crushed materials through 30 mesh to obtain material No. 2;

[0078] S4, placing the No. 2 powder in a high temperature box and killing microorganisms by high temperature heat treatment, the high temperature sterilization temperature is 75°C, and the sterilization time is 1 hour;

[0079] S5. Weigh aquatic trace elements, mix material No. 1 and material No. 2, then pour the auxiliary materials and aquatic trace elements into a stirring device, pour material No. 1 and material No. 2 into the stirring device and mix them together, stir at a speed of 500 r / min for 5 minutes to obtain a mixture;

[0080] S6. Weigh the functional enzyme, antimicrobial peptide, and bile acid, and then mix the functional enzyme, antimicrobial peptide, and bile acid in a ratio of 1:1:1, mix them by a stirring device, and stir at a speed of 500 r / min for 3 hours to obtain a stirring material;

[0081] S7, filtering the stirred material in S6 to obtain a clarified filtrate and a filter residue, repeatedly extracting the filter residue 3 times, and combining the filtrates to obtain a filtrate;

[0082] S8. Weigh sodium humate and yeast selenium, mix the mixture and the stirring material evenly, then pour in the sodium humate and yeast selenium, mix evenly and pour into an extrusion granulator for granulation, and dry at low temperature to obtain a low-fat feed for low-fat fish farming.

[0083] Example 2

[0084] The present embodiment provides a low-fat feed for low-fat fish farming, and the components are calculated by weight: low-fat fish meal: 150 parts, lipid-lowering material rhubarb: 100 parts, peas: 60 parts, starch raw material wheat: 70 parts, vitamin B1: 13 parts, aquatic trace elements: 20 parts, dietary fiber lignin: 10 parts, functional enzymes: 10 parts, antimicrobial peptides: 10 parts, sodium humate: 10 parts, zeolite powder: 3 parts, bile acid: 10 parts, yeast selenium: 10 parts. In this embodiment, the aquatic trace elements are zinc, iron, and selenium, which are added to the feed in the form of zinc sulfate, ferrous sulfate, and sodium selenite, respectively, with a total mass of 20 parts. As shown in Table 2.

[0085] Table 2

[0086]

[0087] This embodiment also provides a method for preparing a low-fat feed for low-fat fish farming, comprising the following steps:

[0088] S1, weighing low-fat fish meal, oligosaccharides and zeolite, mixing the low-fat fish meal with dietary fiber lignin, crushing the zeolite until the proportion of materials passing through a 40-mesh sieve is more than 50%, obtaining zeolite powder, and then mixing the zeolite powder, low-fat fish meal and dietary fiber lignin again to obtain material No. 1;

[0089] S2, weighing lipid-lowering material rhein and vitamin B1, mixing the lipid-lowering material rhein and vitamin B1, and then letting them stand for 4 hours, stirring them 10 times during the period, to obtain an auxiliary material;

[0090] S3, weighing peas and starch raw material wheat, washing the peas and starch raw material wheat, drying the peas and starch raw material wheat after washing, crushing them by a crusher after drying, and sieving the crushed materials through 60 mesh to obtain material No. 2;

[0091] S4, placing the No. 2 powder in a high temperature box and killing microorganisms by high temperature heat treatment, the high temperature sterilization temperature is 90°C, and the sterilization time is 2h;

[0092] S5. Weigh aquatic trace elements, mix material No. 1 and material No. 2, then pour the auxiliary materials and aquatic trace elements into a stirring device, pour material No. 1 and material No. 2 into the stirring device and mix them together, stir at a speed of 700 r / min for 10 min to obtain a mixture;

[0093] S6, weighing functional enzymes, antimicrobial peptides, and bile acid, and then mixing the functional enzymes, antimicrobial peptides, and bile acid in a ratio of 1:1:1, mixing by a stirring device, and stirring at a speed of 800 r / min for 6 hours to obtain a stirring material;

[0094] S7, filtering the stirred material in S6 to obtain a clarified filtrate and a filter residue, repeatedly extracting the filter residue 5 times, and combining the filtrates to obtain a filtrate;

[0095] S8. Weigh sodium humate and yeast selenium, mix the mixture and the stirring material evenly, then pour in the sodium humate and yeast selenium, mix evenly and pour into an extrusion granulator for granulation, and dry at low temperature to obtain a low-fat feed for low-fat fish farming.

[0096] Example 3

[0097] The present embodiment provides a low-fat feed for low-fat fish farming, and the components are calculated by weight: low-fat fish meal: 130 parts, lipid-lowering material chrysophanol: 76 parts, flaxseed meal: 45 parts, starch raw material wheat bran: 50 parts, vitamin B1: 9 parts, aquatic trace elements: 12 parts, dietary fiber pectin: 7 parts, functional enzymes: 7 parts, antimicrobial peptides: 7 parts, sodium humate: 7 parts, zeolite powder: 2 parts, bile acid: 8 parts, yeast selenium: 8 parts. In this embodiment, the aquatic trace elements are zinc, iron, and selenium, which are added to the feed in the form of zinc sulfate, ferrous sulfate, and sodium selenite, respectively, with a total mass of 12 parts. As shown in Table 3.

[0098] Table 3

[0099]

[0100] This embodiment also provides a method for preparing a low-fat feed for low-fat fish farming, comprising the following steps:

[0101] S1, weighing low-fat fish meal, dietary fiber pectin and zeolite, mixing the low-fat fish meal with oligosaccharides, crushing the zeolite until the proportion of materials passing through a 40-mesh sieve is more than 50%, to obtain zeolite powder, and then mixing the zeolite powder, low-fat fish meal and dietary fiber pectin again to obtain material No. 1;

[0102] S2, weighing chrysophanol and vitamin B1, mixing the lipid-lowering material chrysophanol and vitamin B1, and then letting them stand for 3 hours, stirring them 8 times during the period, to obtain an auxiliary material;

[0103] S3, weighing flaxseed meal and wheat bran as a starch raw material, washing the flaxseed meal and the wheat bran as a starch raw material, drying the flaxseed meal and the wheat bran as a starch raw material after washing, grinding the flaxseed meal and the wheat bran as a starch raw material through a grinder after drying, and sieving the ground material through 50 mesh to obtain material No. 2;

[0104] S4, placing the No. 2 powder in a high temperature box and killing microorganisms by high temperature heat treatment, the high temperature sterilization temperature is 82°C, and the sterilization time is 2h;

[0105] S5. Weigh aquatic trace elements, mix material No. 1 and material No. 2, then pour the auxiliary materials and aquatic trace elements into a stirring device, pour material No. 1 and material No. 2 into the stirring device and mix them together, stir at a speed of 600 r / min for 8 minutes to obtain a mixture;

[0106] S6, weighing functional enzymes, antimicrobial peptides, and bile acid, and then mixing the functional enzymes, antimicrobial peptides, and bile acid in a ratio of 1:1:1, mixing by a stirring device, and stirring at a speed of 600 r / min for 5 hours to obtain a stirring material;

[0107] S7, filtering the stirred material in S6 to obtain a clarified filtrate and a filter residue, repeatedly extracting the filter residue 4 times, and combining the filtrates to obtain a filtrate;

[0108] S8. Weigh sodium humate and yeast selenium, mix the mixture and the stirring material evenly, then pour in the sodium humate and yeast selenium, mix evenly and pour into an extrusion granulator for granulation, and dry at low temperature to obtain a low-fat feed for low-fat fish farming.

[0109] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A low-fat feed for low-fat fish farming, characterized in that: The components include, by weight: low-fat fish meal: 100-150 parts, lipid-reducing feed: 40-100 parts, vegetable protein raw materials: 30-60 parts, starch raw materials: 20-70 parts, vitamin B1: 5-13 parts, aquatic trace elements: 5-20 parts, dietary fiber: 2-10 parts, functional enzymes: 5-10 parts, antimicrobial peptides: 5-10 parts, water quality improver: 4-10 parts, zeolite powder: 1-3 parts, bile acid: 5-10 parts, yeast selenium: 5-10 parts.

2. The low-fat feed for low-fat fish farming according to claim 1, characterized in that: The lipid-lowering material is chrysophanol or rhein, and the plant protein raw material is a mixture of one or more of soybean, pea and linseed meal.

3. The low-fat feed for low-fat fish farming according to claim 1, characterized in that: The starch raw material is a mixture of corn, wheat and wheat bran.

4. The low-fat feed for low-fat fish farming according to claim 1, characterized in that: The aquatic trace elements are zinc, iron and selenium, which are added to the feed in the form of zinc sulfate, ferrous sulfate and sodium selenite respectively.

5. The low-fat feed for low-fat fish farming according to claim 1, characterized in that: The dietary fiber is a mixture of one or more of pectin, lignin and oligosaccharides.

6. The low-fat feed for low-fat fish farming according to claim 1, characterized in that: The functional enzyme is a mixture of digestive enzymes and metabolic enzymes, and the water quality improver is sodium humate.

7. The low-fat feed for low-fat fish farming according to claim 1, characterized in that: The low-fat fish is one or more of tilapia, cuttlefish, cod and flounder.

8. The method for preparing a low-fat feed for low-fat fish farming according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1. Weigh low-fat fish meal, dietary fiber and zeolite according to the formula, crush and sieve the zeolite, and then mix the low-fat fish meal, dietary fiber and crushed zeolite to obtain material No. 1; S2. Weigh a lipid-lowering material and vitamin B1, mix the lipid-lowering material and vitamin B1, and then let it stand for 2-4 hours, stirring 5-10 times during the period, to obtain an auxiliary material; S3, weighing a vegetable protein raw material and a starch raw material, washing the vegetable protein raw material and the starch raw material, drying the vegetable protein raw material and the starch raw material after washing, crushing the raw material by a crusher after drying, and sieving the crushed material through 30-60 mesh to obtain material No. 2; S4. Place the No. 2 powder in a high temperature box and kill microorganisms by high temperature heat treatment. The high temperature sterilization temperature is 75-90°C and the sterilization time is 1-2h; S5. Weigh aquatic trace elements, mix material No. 1 and material No. 2, then pour the auxiliary materials and aquatic trace elements into the stirring device, pour material No. 1 and material No. 2 into the stirring device and mix them together, stir at a speed of 500-700 r / min for 5-10 min to obtain a mixture; S6. Weigh the functional enzyme, antimicrobial peptide, and bile acid, and mix them according to the ratio of the formula to obtain a stirring material; S7, filtering the stirred material in step S6 to obtain a clarified filtrate and a filter residue, repeatedly extracting the filter residue 3-5 times, and combining the filtrates to obtain a filtrate; S8. Weigh a water quality improver and yeast selenium, mix the mixture and the stirring material evenly, then pour in the water quality improver and yeast selenium, mix evenly and pour into an extrusion granulator for granulation, and dry at low temperature to obtain a low-fat feed for low-fat fish farming.

9. The method for preparing a low-fat feed for low-fat fish farming according to claim 8, characterized in that: The step S1 of weighing low-fat fish meal, dietary fiber and zeolite, crushing and sieving the zeolite, and then mixing the low-fat fish meal, dietary fiber and crushed zeolite to obtain material No. 1 specifically comprises the following steps: S11, weighing low-fat fish meal, dietary fiber and zeolite, and mixing the low-fat fish meal with the dietary fiber; S12, crushing the zeolite until the proportion of the material passing through a 40-mesh sieve is more than 50%, thereby obtaining zeolite powder; S13, then mix the zeolite powder, low-fat fish meal and dietary fiber again to obtain material No.

1.

10. The method for preparing a low-fat feed for low-fat fish farming according to claim 8, characterized in that: The step S6 of weighing the functional enzyme, antimicrobial peptide, and bile acid and mixing them in proportion to obtain a stirring material specifically comprises the following steps: S61, weighing functional enzymes, antimicrobial peptides, and bile acid, and then mixing the functional enzymes, antimicrobial peptides, and bile acid in a mass ratio of 1:1:1-2; S62, mixing by a stirring device, stirring at a speed of 500-800 r / min for 3-6 hours to obtain a stirring material.

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