Aquatic feed containing strontium polysaccharide and preparation method thereof

Abstract

The invention discloses an aquatic feed containing strontium polysaccharide and a preparation method thereof, and belongs to the technical field of aquaculture. According to the aquatic feed containing the strontium polysaccharide, the soybean meal is subjected to secondary fermentation and is mixed with the raw materials such as the strontium polysaccharide, the fish meal, the high gluten flour, the chicken meal, the multi-mineral premix and the multi-vitamin premix, and the aquatic feed containing the strontium polysaccharide is obtained and can remarkably reduce indexes such as low-density cholesterol protein, cholesterol and MDA of hybrid sturgeons; and moreover, no negative influence is generated on the growth of the hybrid sturgeons, and the problem that the fishes are over-nutritive and easily suffer from diseases is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of aquaculture, and in particular relates to an aquatic feed containing strontium polysaccharide and a preparation method thereof. Background Art

[0002] With the high-density farming, in order to reduce costs, more carbohydrates are used in aquatic feeds, but fish have a low efficiency in converting and utilizing sugars. High-density feeding will lead to overnutrition of fish and increase the rate of fat production in fish livers, making fish more susceptible to diseases and affecting their health. The liver is the most important metabolic organ in fish. Its damage or lesions often lead to metabolic disorders and reduced disease resistance in aquatic animals, which can easily cause outbreaks of secondary infectious diseases and the spread of syndromes, seriously threatening the sustainable and healthy development of intensive aquaculture, and has become an important problem hindering the further development of aquaculture. How to prevent and treat fatty liver in fish has become one of the urgent problems to be solved in aquaculture. Therefore, it is extremely important to develop aquatic feed formulas that inhibit fat production. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide an aquatic feed containing strontium polysaccharide and a preparation method thereof, so as to solve the technical problem of excessive fat growth in the liver of fish in a high-density breeding environment.

[0004] To achieve the above-mentioned purpose, the technical scheme adopted by the present invention is: to provide an aquatic feed containing strontium polysaccharide, the raw materials used include basic raw materials and strontium polysaccharide, the basic raw materials include, by mass, 30-40 parts of fish meal, 20-25 parts of compound soybean meal, 10-15 parts of high-gluten flour, 3-7 parts of chicken meal, 3-7 parts of peanut bran, 3-7 parts of soybean lecithin oil, 3-6 parts of fish oil, 1-4 parts of porcine hemoglobin powder, 1-4 parts of gluten powder, 1-4 parts of seaweed powder, 1-3 parts of calcium dihydrogen phosphate, 0.5-1.5 parts of multi-mineral premix and 0.5-1.5 parts of multi-dimensional premix; the ratio of strontium polysaccharide to basic raw materials is 120-170 mg:1kg.

[0005] Fish meal contains a variety of essential amino acids, providing high-quality animal protein for farmed animals and promoting growth and development. Soybean meal is an important source of plant protein in feed and can also replace fish meal to a certain extent. High-gluten flour provides a certain amount of energy and fiber, and improves the bonding of various raw materials. Chicken meal is a high-quality source of animal protein, with a protein content of usually more than 60%, which improves the overall protein level of the feed; the taste of chicken meal can improve the palatability of the feed and promote the animal's food intake. Peanut bran contains a certain amount of plant protein (usually around 20%-25%), which can be used as a supplementary source of protein, and it is rich in fiber, which helps to improve the digestibility of feed and promote intestinal health. Soybean lecithin oil is a source of fatty acids, providing essential fatty acids, which helps to maintain cell membrane structure and function. Soybean lecithin oil can also be used as an emulsifier to help improve fat digestion and absorption and enhance the palatability of feed. Fish oil is rich in EPA and DHA, which has a positive effect on growth and the immune system, can improve skin and scale health, and promote the health and color of aquatic animals. Porcine hemoglobin powder provides rich animal protein and is suitable for enhancing the overall protein content of feed. Porcine hemoglobin powder contains a variety of essential amino acids, especially lysine, which promotes growth and development. The good taste can also increase the animal's food intake. Gluten is a source of plant protein. It is rich in plant protein, improves the adhesion of feed, helps to form feed particles, and prevents dispersion; improves digestibility and is suitable for a variety of aquatic animals. Seaweed powder is rich in a variety of minerals and vitamins, which is beneficial to animal health and helps to improve intestinal health and digestion. Some seaweed contains natural immunomodulatory ingredients to enhance immunity. Calcium dihydrogen phosphate provides necessary calcium and phosphorus to support the healthy development of bones and teeth and promote growth. Multi-mineral premixes provide a variety of minerals (such as zinc, manganese, copper, selenium, etc.) to support physiological functions and the immune system, maintain physiological balance, and ensure that animals get a comprehensive supply of minerals. Multidimensional premixes provide a variety of vitamins (such as vitamin A, D, E, B vitamins, etc.) to support growth and metabolism and improve animal immunity.

[0006] On the basis of the above technical solution, the present invention can also be improved as follows:

[0007] Furthermore, the basic raw materials include, by mass, 35 parts of fish meal, 22 parts of compound soybean meal, 12 parts of high-gluten flour, 5 parts of chicken meal, 5 parts of peanut bran, 5 parts of soybean lecithin oil, 4.5 parts of fish oil, 2.5 parts of porcine hemoglobin powder, 2.5 parts of gluten powder, 2.5 parts of seaweed powder, 2 parts of monocalcium phosphate, 1 part of multi-mineral premix and 1 part of multi-dimensional premix; the ratio of strontium polysaccharide to basic raw materials is 145 mg:1 kg.

[0008] Furthermore, the basic raw materials include, by mass, 30 parts of fish meal, 20 parts of compound soybean meal, 15 parts of high-gluten flour, 7 parts of chicken meal, 3 parts of peanut bran, 3 parts of soybean lecithin oil, 6 parts of fish oil, 4 parts of porcine hemoglobin powder, 1 part of gluten powder, 1 part of seaweed powder, 3 parts of monocalcium phosphate, 0.5 parts of multi-mineral premix and 1.5 parts of multi-dimensional premix; the ratio of strontium polysaccharide to basic raw materials is 120 mg:1 kg.

[0009] Furthermore, the basic raw materials include, by mass, 40 parts of fish meal, 25 parts of compound soybean meal, 10 parts of high-gluten flour, 3 parts of chicken meal, 7 parts of peanut bran, 7 parts of soybean lecithin oil, 3 parts of fish oil, 1 part of porcine hemoglobulin powder, 4 parts of gluten powder, 4 parts of seaweed powder, 1 part of monocalcium phosphate, 1.5 parts of multi-mineral premix and 0.5 parts of multi-dimensional premix; the ratio of strontium polysaccharide to basic raw materials is 170 mg:1 kg.

[0010] Furthermore, strontium polysaccharide is prepared by the following method: a saturated solution of Poria cocos polysaccharide (pcp) is mixed with a 2M SrCl2 solution in a volume ratio of 1-2:1-2, and then the pH of the mixed solution is adjusted to 9-11, and then allowed to react for 0.5-1.5 hours; then anhydrous ethanol is added to the reaction system, and the reaction system is allowed to stand for 22-26 hours, and finally filtered and washed to obtain strontium polysaccharide (pcp-Sr).

[0011] Furthermore, the reagent for adjusting the pH value of the mixed solution is NaOH solution.

[0012] Furthermore, the washing process is as follows: washing the filtrate with 80%, 60% and 40% ethanol solutions in sequence to obtain strontium polysaccharide.

[0013] Furthermore, the composite soybean meal is prepared by the following method: the soybean meal is crushed, then 5-7wt% of cellulomonas is added and mixed evenly, and then fermented at 30-36°C for 46-50h to obtain the composite soybean meal.

[0014] Furthermore, the cellulomonas is a mixture of Bacillus amyloliquefaciens, Lactobacillus plantarum and Saccharomyces cerevisiae in a mass ratio of 8-10:2-4:1-3.

[0015] Furthermore, the multi-mineral premix is ​​obtained by mixing calcium lactate, K2HPO4, Ca(H2PO4)2·H2O, NaCl, KI, CuSO4·5H2O, MnSO4·H2O, ZnSO4·H2O, K2CO3 and α-cellulose in a mass ratio of 300-400:200-300:150-200:50-100:0.1-0.2:30-40:2-3:10-20:30-40:50-70.

[0016] Furthermore, the multidimensional premix is ​​obtained by mixing VA, VB1, VB2, VB3, VB5, VB6, VH, VB12, VC, VD3, VE, VK3, VM and α-cellulose in a mass ratio of 50-70: 5-10: 10-15: 50-100: 20-30: 10-15: 0.3-0.5: 0.01-0.03: 500-700: 0.03-0.05: 80-110: 5-10: 3-5: 90-100.

[0017] The invention also discloses a method for preparing an aquatic feed containing strontium polysaccharide, which comprises the following steps: mixing basic raw materials and strontium polysaccharide in proportion, granulating, and air-drying to obtain the aquatic feed containing strontium polysaccharide.

[0018] Furthermore, the method comprises the following steps: mixing the basic raw material and strontium polysaccharide in proportion, processing the mixed raw material into particles with a particle size of 2-5 mm by a twin-screw extruder, and then air-drying the particles to 8-12% moisture at room temperature to obtain aquatic feed containing strontium polysaccharide.

[0019] The beneficial effects of the present invention are as follows: the present invention adds strontium polysaccharide (pcp-Sr) to prepare aquatic feed, which can significantly reduce the low-density cholesterol protein, cholesterol, MDA and other indicators of hybrid sturgeon, improve liver lipid accumulation, and has no negative impact on the growth of hybrid sturgeon, and reduces the probability of disease occurrence. The aquatic feed prepared by the present invention contains rich amino acids, vitamins and trace elements, which can directly or indirectly promote the digestion and utilization of nutrients, and has the advantages of small toxic and side effects, no drug resistance, no residue, etc., meets the requirements of green food being purely natural, and can obtain good economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is the oil red stained section of hybrid sturgeon without adding strontium polysaccharide;

[0021] Figure 2 This is the oil red stained section of the liver of hybrid sturgeon when the addition amount of strontium polysaccharide is 100 mg / kg;

[0022] Figure 3 This is an oil red stained section of the liver of hybrid sturgeon when the addition amount of strontium polysaccharide is 200 mg / kg;. DETAILED DESCRIPTION

[0023] The specific embodiments of the present invention are described below to facilitate the understanding of the present invention by those skilled in the art. If the specific conditions are not specified in the examples, the methods are carried out according to conventional conditions or conditions recommended by the manufacturer. If the manufacturers are not specified in the reagents or instruments used, they are all conventional products that can be purchased commercially. However, it should be clear that the present invention is not limited to the scope of the specific embodiments. For those skilled in the art, as long as various changes are within the spirit and scope of the present invention defined and determined by the attached claims, these changes are obvious, and all inventions and creations using the concept of the present invention are protected.

[0024] Example 1

[0025] A kind of aquatic feed containing strontium polysaccharide, the raw materials used include basic raw materials and strontium polysaccharide, the basic raw materials include by weight: 35 parts of fish meal, 22 parts of compound soybean meal, 12 parts of high-gluten flour, 5 parts of chicken meal, 5 parts of peanut bran, 5 parts of soybean lecithin oil, 4.5 parts of fish oil, 2.5 parts of porcine hemoglobin powder, 2.5 parts of gluten powder, 2.5 parts of seaweed powder, 2 parts of calcium dihydrogen phosphate, multi-mineral premix (calcium lactate, K2HPO4, Ca(H2PO4)2·H2O, NaCl, KI, CuSO4·5H2O, MnSO4·H2O, ZnSO4·H2O, K2C O3 and α-cellulose in a mass ratio of 350:250:175:75:0.125:37.5:2.5:14.05:35:60.825) 1 part and multidimensional premix (the mass ratio of VA, VB1, VB2, VB3, VB5, VB6, VH, VB12, VC, VD3, VE, VK3, VM and α-cellulose is 60:8:12:80:24:12:0.4:0.02:600:0.04:96:8:4:95.54) 1 part, the ratio of strontium polysaccharide to basic raw material is 145mg:1kg;

[0026] Strontium polysaccharide is prepared by the following method: a saturated solution of Poria polysaccharide is mixed with a 2M SrCl2 solution in a volume ratio of 1:1, and then the pH of the mixed solution is adjusted to 10 with a NaOH solution, and then the reaction is allowed to stand for 1 hour; then anhydrous ethanol is added to the reaction system, and the reaction is allowed to stand for 24 hours, and finally filtered, and the filtrate is washed with 80%, 60% and 40% ethanol solutions in sequence to obtain strontium polysaccharide.

[0027] The composite soybean meal is prepared by the following method: the soybean meal is crushed, and then 6wt% of cellulomonas (the mass ratio of Bacillus amyloliquefaciens, Lactobacillus plantarum and Saccharomyces cerevisiae is 9:3:2) is added and mixed evenly, and then fermented at 34°C for 48h to obtain the composite soybean meal.

[0028] A method for preparing an aquatic feed containing strontium polysaccharide comprises the following steps: mixing a basic raw material and strontium polysaccharide in proportion, processing the mixed raw material into particles with a particle size of 3 mm by a twin-screw extruder, and then air-drying the particles to 10% moisture at room temperature to obtain an aquatic feed containing strontium polysaccharide.

[0029] Example 2

[0030] A kind of aquatic feed containing strontium polysaccharide, the raw materials used include basic raw materials and strontium polysaccharide, the basic raw materials include by weight: 30 parts of fish meal, 20 parts of compound soybean meal, 15 parts of high-gluten flour, 7 parts of chicken meal, 3 parts of peanut bran, 3 parts of soybean lecithin oil, 6 parts of fish oil, 4 parts of porcine hemoglobin powder, 1 part of gluten powder, 1 part of seaweed powder, 3 parts of calcium dihydrogen phosphate, multi-mineral premix (calcium lactate, K2HPO4, Ca(H2PO4)2·H2O, NaCl, KI, CuSO4·5H2O, MnSO4·H2O, ZnSO4·H2O, K2C The mass ratio of strontium polysaccharide and basic raw material is 120 mg: 1 kg.

[0031] Strontium polysaccharide is prepared by the following method: a saturated solution of Poria polysaccharide is mixed with a 2M SrCl2 solution in a volume ratio of 1:2, and then the pH of the mixed solution is adjusted to 9 with a NaOH solution, and then the reaction is allowed to stand for 1.5 hours; then anhydrous ethanol is added to the reaction system, and the reaction is allowed to stand for 22 hours, and finally filtered, and the filtrate is washed with 80%, 60% and 40% ethanol solutions in sequence to obtain strontium polysaccharide.

[0032] The composite soybean meal is prepared by the following method: the soybean meal is crushed, and then 7wt% of cellulomonas (the mass ratio of Bacillus amyloliquefaciens, Lactobacillus plantarum and Saccharomyces cerevisiae is 8:2:3) is added and mixed evenly, and then fermented at 30°C for 50h to obtain the composite soybean meal.

[0033] A method for preparing an aquatic feed containing strontium polysaccharide comprises the following steps: mixing a basic raw material and strontium polysaccharide in proportion, processing the mixed raw material into particles with a particle size of 5 mm by a twin-screw extruder, and then air-drying the particles to a moisture content of 12% at room temperature to obtain an aquatic feed containing strontium polysaccharide.

[0034] Example 3

[0035] A kind of aquatic feed containing strontium polysaccharide, the raw materials used include basic raw materials and strontium polysaccharide, the basic raw materials include by weight: 40 parts of fish meal, 25 parts of compound soybean meal, 10 parts of high-gluten flour, 3 parts of chicken meal, 7 parts of peanut bran, 7 parts of soybean lecithin oil, 3 parts of fish oil, 1 part of porcine hemoglobin powder, 4 parts of gluten powder, 4 parts of seaweed powder, 1 part of calcium dihydrogen phosphate, multi-mineral premix (calcium lactate, K2HPO4, Ca(H2PO4)2·H2O, NaCl, KI, CuSO4·5H2O, MnSO4·H2O, ZnSO4·H2O, K2C The mass ratio of strontium polysaccharide and basic raw material is 170 mg: 1 kg.

[0036] Strontium polysaccharide is prepared by the following method: a saturated solution of Poria polysaccharide is mixed with a 2M SrCl2 solution in a volume ratio of 2:1, and then the pH of the mixed solution is adjusted to 11 with a NaOH solution, and then the reaction is allowed to stand for 0.5 hours; then anhydrous ethanol is added to the reaction system, and the reaction is allowed to stand for 26 hours, and finally filtered, and the filtrate is washed with 80%, 60% and 40% ethanol solutions in sequence to obtain strontium polysaccharide.

[0037] The composite soybean meal is prepared by the following method: the soybean meal is crushed, and then 5wt% of cellulomonas (the mass ratio of Bacillus amyloliquefaciens, Lactobacillus plantarum and Saccharomyces cerevisiae is 10:4:1) is added and mixed evenly, and then fermented at 36°C for 46 hours to obtain the composite soybean meal.

[0038] A method for preparing an aquatic feed containing strontium polysaccharide comprises the following steps: mixing a basic raw material and strontium polysaccharide in proportion, processing the mixed raw material into particles with a particle size of 2 mm by a twin-screw extruder, and then air-drying the moisture of the particles to 8% at room temperature to obtain an aquatic feed containing strontium polysaccharide.

[0039] Comparative Example

[0040] The difference between this comparative example and Example 1 is that strontium polysaccharide is omitted, and the remaining components and preparation process are the same as those in Example 1 to obtain an aquatic feed.

[0041] Experimental example

[0042] This experiment takes hybrid sturgeon as an example. The hybrid sturgeon (Acipenser siberiensis♀×Acipenser schrenckii♂) used was purchased from the cold water fish farm in Sanjian Township, Fengdu County, Chongqing City. They were all juvenile fish bred from the same batch. Before the formal experiment began, the experimental fish were placed in a breeding barrel with a diameter of 3m for 2 weeks. Then, hybrid sturgeon juveniles with a strong physique, uniform specifications and an initial weight of 312.21±25.31g were selected and randomly assigned to 9 breeding barrels with a diameter of 3m. Each barrel was placed with 30 fish, and each 3 breeding barrels were a group. The experimental fish were fed artificially twice a day (feeding time was 09:00 and 16:00), and the daily feeding amount was 3% of the fish body mass. After 1 hour, the uneaten residual bait was collected, dried and then weighed. Under the natural light cycle, the culture was carried out for 8 weeks, during which the water temperature was 14.4-19.8℃ and the dissolved oxygen was 8.4-8.9mg / L. The results are shown in Table 1.

[0043] The calculation methods of each growth performance index are as follows:

[0044] (1) Survival rate (SR, %) = (N t / N o )×100%;

[0045] (2) Weight gain rate (WGR, %) = (W t -W o ) / W o ×100%;

[0046] (3) Specific growth rate (SGR, % / d) = (W t -W o ) / t×100%

[0047] (4) Feed coefficient (FCR) = W f / (W t -W o );

[0048] (5) Visceral-to-body ratio (VSI, %) = W v / W×100%;

[0049] (6) Fullness (CF, g / cm 3 )=W / L 3 ×100%;

[0050] Among them, N t is the final number, bar; N o is the initial tail number, bar; W t is the final body mass, g; W o is the initial body mass, g; t is the number of experimental days, d; W f is the amount of feed intake, g; W v is the weight of fish viscera, g; W is the weight of fish body, g; L is the length of fish body, cm.

[0051] Table 1 Effects of strontium polysaccharide addition on hybrid sturgeon fry

[0052]

[0053]

[0054] Results analysis: From the table, it can be seen that strontium addition has no significant effect on the growth of hybrid sturgeon, but it can significantly reduce its fatness and fat content in muscle. In addition, the addition of strontium polysaccharide in feed can increase glutathione content, reduce MDA, and improve collective antioxidant capacity. Reducing MDA and AST (AST / GOT) means improving liver damage. Blood biochemical indicators are usually used to judge the pathological condition of organisms. ALT and AST play a role in amino transfer in the process of catalyzing the reaction of α-ketoglutarate with aspartic acid and glutamate to produce glutamate and oxaloacetic acid and glutamate and pyruvic acid. ALT and AST, as liver damage markers, will be released from hepatocytes as the level of liver damage increases. Triglycerides (TG) are synthesized in the liver and stored in adipose tissue, and are usually used to judge the health of bony fish; total cholesterol (tC) levels can indicate the homeostasis of liver cholesterol metabolism, and higher cholesterol levels also mean liver cholesterol metabolism disorders. The downregulation of TG, TC (total cholesterol), ALT and AST means that strontium polysaccharide can inhibit liver lipid levels.

[0055] The results of oil red staining were as follows Figure 1-Figure 3 As shown, the red part is fat, and the redder it is, the more fat is accumulated. It can be seen from the figure that with the increase of the amount of strontium polysaccharide added, the fat content in the liver of hybrid sturgeon decreases, indicating that the aquatic feed containing strontium polysaccharide prepared by the present invention can effectively reduce the fat content in the liver of hybrid sturgeon, solving the problem of excessive fat growth in the liver of fish in a high-density breeding environment.

Claims

1. An aquatic feed containing strontium polysaccharide, characterized in that: The raw materials used for the aquatic feed containing strontium polysaccharide include basic raw materials and strontium polysaccharide. The basic raw materials include, by mass, 30-40 parts of fish meal, 20-25 parts of compound soybean meal, 10-15 parts of high-gluten flour, 3-7 parts of chicken meal, 3-7 parts of peanut bran, 3-7 parts of soybean lecithin oil, 3-6 parts of fish oil, 1-4 parts of porcine hemoglobin powder, 1-4 parts of gluten powder, 1-4 parts of seaweed powder, 1-3 parts of calcium dihydrogen phosphate, 0.5-1.5 parts of multi-mineral premix and 0.5-1.5 parts of multi-dimensional premix; the ratio of strontium polysaccharide to basic raw materials is 120-170 mg:1 kg.

2. The aquatic feed containing strontium polysaccharide according to claim 1, characterized in that: The basic raw materials include, by mass, 35 parts of fish meal, 22 parts of composite soybean meal, 12 parts of high-gluten flour, 5 parts of chicken meal, 5 parts of peanut bran, 5 parts of soybean lecithin oil, 4.5 parts of fish oil, 2.5 parts of porcine hemoglobin powder, 2.5 parts of gluten powder, 2.5 parts of seaweed powder, 2 parts of monocalcium phosphate, 1 part of multi-mineral premix and 1 part of multi-dimensional premix; the ratio of strontium polysaccharide to basic raw materials is 145 mg:1 kg.

3. The aquatic feed containing strontium polysaccharide according to claim 1, characterized in that: The basic raw materials include, by mass, 30 parts of fish meal, 20 parts of composite soybean meal, 15 parts of high-gluten flour, 7 parts of chicken meal, 3 parts of peanut bran, 3 parts of soybean lecithin oil, 6 parts of fish oil, 4 parts of porcine hemoglobin powder, 1 part of gluten powder, 1 part of seaweed powder, 3 parts of monocalcium phosphate, 0.5 parts of multi-mineral premix and 1.5 parts of multi-dimensional premix; the ratio of strontium polysaccharide to basic raw materials is 120 mg:1 kg.

4. The aquatic feed containing strontium polysaccharide according to claim 1, characterized in that: The basic raw materials include, by mass, 40 parts of fish meal, 25 parts of composite soybean meal, 10 parts of high-gluten flour, 3 parts of chicken meal, 7 parts of peanut bran, 7 parts of soybean lecithin oil, 3 parts of fish oil, 1 part of porcine hemoglobin powder, 4 parts of gluten powder, 4 parts of seaweed powder, 1 part of monocalcium phosphate, 1.5 parts of multi-mineral premix and 0.5 parts of multi-dimensional premix; the ratio of strontium polysaccharide to basic raw materials is 170 mg:1 kg.

5. The aquatic feed containing strontium polysaccharide according to any one of claims 1 to 4, characterized in that: The strontium polysaccharide is prepared by the following method: a saturated solution of Poria polysaccharide is mixed with a 2M SrCl2 solution in a volume ratio of 1-2:1-2, and then the pH of the mixed solution is adjusted to 9-11, and then the reaction is allowed to stand for 0.5-1.5 hours; then anhydrous ethanol is added to the reaction system, and the reaction is allowed to stand for 22-26 hours, and finally filtered and washed to obtain the strontium polysaccharide.

6. The aquatic feed containing strontium polysaccharide according to any one of claims 1 to 4, characterized in that: The composite soybean meal is prepared by the following method: the soybean meal is crushed, then 5-7wt% of cellulomonas is added and mixed evenly, and then fermented at 30-36°C for 46-50h to obtain the composite soybean meal.

7. The aquatic feed containing strontium polysaccharide according to claim 6, characterized in that: The cellulomonas is a mixture of Bacillus amyloliquefaciens, Lactobacillus plantarum and Saccharomyces cerevisiae in a mass ratio of 8-10:2-4:1-3.

8. The aquatic feed containing strontium polysaccharide according to any one of claims 1 to 4, characterized in that: The multi-mineral premix is ​​obtained by mixing calcium lactate, K2HPO4, Ca(H2PO4)2·H2O, NaCl, KI, CuSO4·5H2O, MnSO4·H2O, ZnSO4·H2O, K2CO3 and alpha-cellulose in a mass ratio of 300-400:200-300:150-200:50-100:0.1-0.2:30-40:2-3:10-20:30-40:50-70.

9. The aquatic feed containing strontium polysaccharide according to any one of claims 1 to 4, characterized in that: The multidimensional premix is ​​obtained by mixing VA, VB1, VB2, VB3, VB5, VB6, VH, VB12, VC, VD3, VE, VK3, VM and α-cellulose in a mass ratio of 50-70: 5-10: 10-15: 50-100: 20-30: 10-15: 0.3-0.5: 0.01-0.03: 500-700: 0.03-0.05: 80-110: 5-10: 3-5: 90-100.

10. The method for preparing aquatic feed containing strontium polysaccharide according to any one of claims 1 to 9, characterized in that: The method comprises the following steps: mixing the basic raw material and strontium polysaccharide in proportion, granulating, and air-drying to obtain aquatic feed containing strontium polysaccharide.

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