Aquatic bait biological feed as well as preparation method and application thereof

Abstract

The invention provides an aquatic bait biological feed as well as a preparation method and application thereof. Wherein the aquatic bait biological feed comprises a yeast raw material, amino acid raw powder and feed-grade fish oil; wherein the yeast raw material is selected from at least one of yeast metabolite, yeast powder, yeast hydrolysate or yeast cell wall dry powder. The components in the aquatic bait biological feed are appropriate in particle size, can be directly ingested and absorbed by zooplanktons such as rotifers and cladocerans, are easily digested and absorbed by the zooplanktons, and are beneficial to growth and reproduction of bait organisms. In addition, the feed raw materials do not have the problems of pathogenic bacteria and drug residues, and do not have toxicity to bait organisms.

Description

Technical Field

[0001] The present invention relates to the technical field of aquatic bait, and in particular to an aquatic bait biological feed, a preparation method and application thereof. Background Art

[0002] In natural and aquaculture water bodies, there is generally a simple food chain: algae → zooplankton → fish; in order to promote the survival and growth of fish, from the perspective of the food chain, under suitable environmental conditions (temperature, light, water quality, etc.), the biomass of algae and zooplankton can be increased to promote the growth of fish. In aquaculture, sufficient zooplankton will be cultivated in the pond in advance, and water flower seedlings will be released when the biomass of zooplankton reaches a certain level.

[0003] Food organisms, also known as live food, refer to the food of aquatic economic animal seedlings. Aquatic animals have small mouth openings and underdeveloped digestive systems during the seedling stage, so they cannot directly ingest artificial feeds. They are highly dependent on natural feeds such as algae and zooplankton (rotifers, cladocerans, copepods, Artemia, etc.). From the perspective of fish fry survival rate, growth rate, health, impact on water quality, and input cost, the value of food organisms far exceeds that of artificial feeds. Therefore, it is very important to cultivate food organisms during the early stage of fish fry cultivation.

[0004] However, the existing feed for bait organisms is not very suitable for their growth and reproduction. The existing bait biological feed mainly contains higher animal and plant components (such as duck manure, cow manure, sheep manure, fermented pig manure, corn flour, tea meal, rice husk powder, peanut meal powder, fish meal, etc.). The particle size of this component is large and the suspension is poor, which makes it difficult for zooplankton to ingest; and the digestion ability of zooplankton is poor, and the digestion ability of higher animal and plant sources is insufficient; in addition, the feed raw materials derived from livestock and poultry feces may carry pathogenic microorganisms, harmful bacteria or drug residues, which will also bring health threats to aquatic animal seedlings. From the perspective of the preparation method of existing bait biological feed, the existing bait biological feed can only be used after on-site fermentation, which requires the technology of industrial control of feed production to reach a certain level.

[0005] However, there is currently no effective solution for providing an aquatic bait biological nutrient that is simple to prepare and easily absorbed by bait organisms. Summary of the invention

[0006] The main purpose of the present invention is to provide an aquatic bait biological feed, a preparation method and application thereof, so as to solve the problem in the prior art that the bait biological feed is not easily absorbed by the bait organisms.

[0007] In order to achieve the above-mentioned object, according to the first aspect of the present invention, there is provided an aquatic bait biological feed, the aquatic bait biological feed comprising: yeast raw material, amino acid raw powder and feed-grade fish oil; wherein the yeast raw material is selected from at least one of the following: yeast metabolites, yeast powder, yeast hydrolyzate or yeast cell wall dry powder.

[0008] Furthermore, when the yeast raw material is a composition of yeast metabolites, yeast powder, yeast hydrolyzate and yeast cell wall dry powder, the aquatic bait biological feed includes, by mass fraction: 10-15% of yeast metabolites, 5-10% of yeast powder, 57-70% of yeast cell wall dry powder, 1-5% of yeast hydrolyzate, 5-15% of amino acid raw powder and 0.1-0.5% of feed-grade fish oil.

[0009] In order to achieve the above-mentioned purpose, according to the second aspect of the present invention, a method for preparing the above-mentioned aquatic bait biological feed is provided, the preparation method comprising: mixing yeast raw materials, amino acid raw powder and feed-grade fish oil in a solid state according to a proportion to obtain the aquatic bait biological feed.

[0010] In order to achieve the above-mentioned purpose, according to the third aspect of the present invention, there is provided a use of the above-mentioned aquatic bait biological feed or the aquatic bait biological feed prepared by the above-mentioned preparation method in bait biological breeding.

[0011] Furthermore, the application includes: directly putting the aquatic bait biological feed into a breeding pond for bait biological breeding.

[0012] Furthermore, the dosage of aquatic bait biological feed is: 3-4 kg per mu per day.

[0013] Furthermore, the temperature for bait organism cultivation is 20-28°C.

[0014] Furthermore, the bait organisms include algae, rotifers and cladocerans.

[0015] Furthermore, when cultivating bait organisms, the cultivation pond needs to be drained and dried before water is introduced into the cultivation pond for cultivating bait organisms; preferably, the drying time is 15-30 days.

[0016] Furthermore, the water includes groundwater or external pond water filtered through a 70-80 mesh silk sieve; preferably, the water depth of the breeding pond is 50-100 cm; preferably, the area of ​​the breeding pond is 3-5 mu.

[0017] By applying the technical solution of the present invention, the particle size of the ingredients in the aquatic bait biological feed is appropriate, and can be directly ingested and absorbed by zooplankton such as rotifers and cladocerans, and is easily digested and absorbed by zooplankton, which is beneficial to the growth and reproduction of bait organisms. In addition, the feed raw materials of the present application do not have pathogenic bacteria and drug residue problems, and are non-toxic to bait organisms. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0019] Figure 1 A schematic diagram showing the growth density of zooplankton obtained by feeding using the feed and method of Example 1;

[0020] Figure 2 A schematic diagram showing the growth density of zooplankton obtained by feeding using the feed and method of Example 2;

[0021] Figure 3 A schematic diagram showing the growth density of zooplankton obtained by feeding using the feed and method of Example 3;

[0022] Figure 4 A schematic diagram showing the growth density of zooplankton obtained by feeding using the feed and method of Example 4;

[0023] Figure 5 A schematic diagram showing the growth density of zooplankton obtained by feeding using the feed and method of Comparative Example 1;

[0024] Figure 6 A schematic diagram showing the growth density of zooplankton obtained by feeding using the feed and method of Comparative Example 2;

[0025] Figure 7 A schematic diagram showing the growth density of zooplankton obtained by feeding using the feed and method of Comparative Example 3;

[0026] Figure 8 A schematic diagram showing the growth density of zooplankton obtained by feeding using the feed and method of Comparative Example 4;

[0027] Fig. 9 A schematic diagram showing the mean values ​​of the diversity index of algae raised using the feeds and methods of Examples 1-4 and Comparative Examples 1-4;

[0028] Fig.10 A schematic diagram showing the average cell density of algae fed using the feeds and methods of Examples 1-4 and Comparative Examples 1-4;

[0029] Fig.11 A schematic diagram showing the mean dissolved oxygen values ​​of feeds and methods of Examples 1-4 and Comparative Examples 1-4 is shown. DETAILED DESCRIPTION

[0030] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0031] Glossary:

[0032] Algae: Mainly aquatic, without vascular bundles, and capable of photosynthesis. They vary in size, from single-celled flagellates as small as 1 micron in length. Algae are food for zooplankton, some filter-feeding shellfish, and fish. Single-celled algae in aquaculture ponds can only be observed with the aid of a microscope, and sometimes gather in groups to form blooms visible to the naked eye. The water color of aquaculture ponds is closely related to the type and composition of algae. There are hundreds of common algae species in aquaculture ponds.

[0033] Zooplankton: refers to aquatic animals suspended in water, which have no swimming ability or weak swimming ability, cannot move long distances, and are not strong enough to resist the flow of water. Zooplankton generally includes protozoa, rotifers, cladocerans and copepods. Rotifers and cladocerans can generally be used as biological bait for fish fry.

[0034] Rotifer: It is the smallest multicellular animal. It is called rotifer because of the rotating wheel-shaped structure on its head for feeding. It is classified as a pseudocoelom. There are more than 400 species of rotifer reported in my country. It is a good starter bait for fish, shrimp, shellfish and crab seedlings. Rotifer mainly filters single-cell algae and bacteria in water.

[0035] Cladocera: Commonly known as water daphnia or red worms, they have branch-like structures on their bodies, so they are called cladocera. They belong to the phylum Arthropoda. There are more than 100 species of freshwater cladocera in my country. The food of cladocera mainly includes yeast, bacteria, unicellular algae, organic debris, etc. Cladocera are also an important natural bait for fish.

[0036] As mentioned in the background technology, bait organisms, such as rotifers and cladocerans, have great utilization value as food for aquatic economic animal seedlings, but using existing feeds with higher animals and plants as the main ingredients to cultivate bait organisms is not easy for bait organisms to absorb and may have certain toxic risks. Therefore, the present application intends to provide a bait organism feed that is easier to be absorbed by bait organisms, so as to facilitate the cultivation of bait organisms.

[0037] In a first typical embodiment of the present application, an aquatic bait biological feed is provided, which includes: yeast raw material, amino acid raw powder and feed-grade fish oil; wherein the yeast raw material is selected from at least one of the following: yeast metabolites, yeast powder, yeast hydrolyzate or yeast cell wall dry powder.

[0038] Among them, the definitions and properties of yeast metabolites, yeast powder, yeast hydrolyzate, and yeast cell wall dry powder are as follows:

[0039] Yeast metabolites: Using molasses and hydrolyzed sugar as the main raw materials, after aerobic fermentation to produce yeast, the product is produced through concentration and drying processes to produce substances rich in fulvic acid, polysaccharides and major, medium and trace elements. The crude protein content is about 20-30%, and the fulvic acid content is about 25-45%.

[0040] Yeast powder: With brewer's yeast (Saccharomyces cerevisiae), molasses and starch as the main raw and auxiliary materials, brewer's yeast is cultured by liquid fermentation and ventilation, and the live yeast cells are separated from the fermented mash. After dehydration and drying, the live bacteria product that can be directly added to the feed is obtained. It contains live yeast cells and the number of live bacteria is ≥15 billion cfu / g.

[0041] Yeast hydrolysate: A product obtained by liquid fermentation of Saccharomyces cerevisiae, followed by autolysis or exogenous enzyme-catalyzed hydrolysis, and then concentrated or dried. The yeast soluble matter is not extracted.

[0042] Yeast cell wall dry powder: The yeast body obtained by liquid fermentation of Saccharomyces cerevisiae is separated by autolysis or exogenous enzyme catalytic hydrolysis, or mechanical crushing, and the cell wall is concentrated and dried to obtain the product.

[0043] Fish oil is a kind of oil extracted from fatty fish. It is rich in eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA, commonly known as brain gold) and various n-3 polyunsaturated fatty acids (n-3PUFA).

[0044] Amino acid raw powder is a directional concentrated extract of high-efficiency amino acid nutrient solution. It is made from natural keratin hair through hydrolysis, deacidification, desalination and spray drying. It mainly contains 18 kinds of free amino acids.

[0045] The main component of the bait biological feed of the present application is yeast raw material. Since microbial protein is close to the food (bacteria) components and nutrients of rotifers and cladocerans, and there is no pollution or pathogenic bacteria, it is easier to digest and absorb. In addition, yeast metabolites contain certain inorganic nutrients, and contain biological stimulating ingredients such as betaine, which can promote the rapid growth of algae. This also provides more algae for the bait organisms to grow and reproduce, and provides sufficient material support for the bait organisms. In addition, the feed in the prior art is mostly placed at the bottom of the pond for the bait organisms (i.e., zooplankton) to eat. Because zooplankton mainly feeds on suspended food, placing it at the bottom of the pond will result in low feed utilization and the risk of causing hypoxia at the bottom of the pond. The yeast metabolites in the feed of the present application have good water solubility (water-insoluble matter ≤5%), and the yeast and yeast cell walls have good suspension, which is more conducive to direct feeding by zooplankton.

[0046] In order to further obtain feed suitable for absorption by bait organisms, in a preferred embodiment, when the yeast raw material is a composition of yeast metabolites, yeast powder, yeast hydrolyzate and yeast cell wall dry powder, the aquatic bait biological feed includes, by mass fraction: 10-15% yeast metabolites, 5-10% yeast powder, 57-70% yeast cell wall dry powder, 1-5% yeast hydrolyzate, 5-15% amino acid raw powder and 0.1-0.5% feed-grade fish oil.

[0047] Since the particle size of food that rotifers can ingest is required to be less than 10 μm, and the particle size of food that cladocerans require is less than 50 μm, the soybean meal, crushed fermented straw, and meat and bone meal in existing feeds are generally difficult to be crushed to such a particle size, and if they are crushed to such a particle size, it will cost a very high cost. Yeast raw materials are easier to be processed into feeds with smaller particle sizes for absorption and utilization by bait organisms. In a preferred embodiment, the particle size of the yeast raw materials is ≤6 μm.

[0048] In a second typical embodiment of the present application, a method for preparing the above-mentioned aquatic bait biological feed is provided, the preparation method comprising: mixing yeast raw material, amino acid raw powder and feed-grade fish oil in a solid state according to a proportion to obtain an aquatic bait biological feed. The feed of the present application can be obtained by solid-state mixing, the operation is simple, and no fermentation is required, which greatly improves the efficiency of feed preparation.

[0049] In a third typical embodiment of the present application, there is provided an application of the above-mentioned aquatic bait biological feed or the aquatic bait biological feed prepared by the above-mentioned preparation method in bait biological breeding.

[0050] Since the feed ingredients of the present application have good water solubility and good suspension, they do not need to be spread on the bottom of the pond when applied. In a preferred embodiment, the application includes: directly putting the aquatic bait biological feed into a breeding pond for bait biological breeding.

[0051] Since the energy source of the pond is sunlight, the light can only penetrate the surface layer of the pond water, and the water input can only work in the illuminated layer, so the amount of feed used is calculated based on the illuminated area. Different from the higher usage of existing feed (about 300-500 kg per mu), in order to further promote the growth of bait organisms efficiently, in a preferred embodiment, the amount of aquatic bait organism feed is: 3-4 kg per mu per day. Preferably, the temperature for bait organism cultivation is 20-28°C; preferably, the bait organisms include: algae, rotifers and cladocerans.

[0052] In order to further avoid contamination of the bait organisms during their growth, in a preferred embodiment, when cultivating the bait organisms, the cultivation pond must first be drained and dried, and then water is introduced into the cultivation pond for cultivation of the bait organisms; preferably, the drying time is 15-30 days.

[0053] In order to further provide a suitable growth environment for the growth of bait organisms, in a preferred embodiment, the water includes groundwater or external pond water filtered through a 70-80 mesh silk sieve; preferably, the water depth of the breeding pond is 50-100 cm; preferably, the area of ​​the breeding pond is 3-5 mu.

[0054] The present application is further described in detail below in conjunction with specific embodiments. These embodiments should not be construed as limiting the scope of protection claimed in the present application.

[0055] The sources of the raw materials used in the examples of this application are shown in Table 1 below:

[0056] Table 1:

[0057] raw material source Yeast metabolites Angel Yeast Co., Ltd. Yeast powder Angel Yeast Co., Ltd. Yeast hydrolysate Angel Yeast Co., Ltd. Yeast cell wall dry powder Angel Yeast Co., Ltd. Amino Acid Powder Sichuan Shihong Technology Co., Ltd. Feed grade fish oil Guangdong Gaomei Feed Co., Ltd.

[0058] The proportions of various components of the aquatic bait biological feed in each embodiment and comparative example of the present application are calculated by mass fraction, and the specific data parameters are shown in Table 2 below:

[0059] Table 2:

[0060]

[0061] Example 1

[0062] The feed raw materials were weighed according to the ratios in Table 2, and mixed to obtain aquatic bait biological feed.

[0063] The selected earthen pond is 5 mu in area. After draining, the pond is exposed to the sun for 20 days. The bottom of the pond is plowed mechanically with a plowing depth of 10 to 20 cm. Groundwater is introduced to make the water level reach 100 cm. Aquatic bait biological feed is evenly sprinkled at a dosage of 3 kg / mu per day. Samples are taken every day to detect the biomass of rotifers and cladocerans, and the cell density and dissolved oxygen content of algae species are measured. The water temperature during the experiment is 20 to 25 ° C, and the experimental time is 10 days. During the experiment, the number of cladocerans and rotifers showed an overall trend of gradual increase. Figure 1 As shown, the zooplankton density reached a peak on the 9th day, with a total of 3187.9 individuals / L.

[0064] Example 2

[0065] The feed raw materials were weighed according to the ratios in Table 2, and mixed to obtain aquatic bait biological feed.

[0066] The area of ​​the selected earthen pond was 5 mu. After draining, the pond was exposed to the sun for 20 days. The bottom of the pond was plowed mechanically with a plowing depth of 10-20 cm. Groundwater was introduced to make the water level reach 100 cm. Aquatic bait biological feed was evenly sprinkled at a dosage of 3 kg / mu per day. Samples were taken every day to detect the biomass of rotifers and cladocerans, and the cell density of algae species and dissolved oxygen content. The water temperature was 20-25°C during the experiment. The experimental time was 10 days. During the experiment, the number of cladocerans and rotifers showed a gradual increase as a whole. Figure 2 As shown, the zooplankton density reached a peak on the 10th day, with a maximum value of 4105 / L.

[0067] Example 3

[0068] The feed raw materials were weighed according to the ratios in Table 2, and mixed to obtain aquatic bait biological feed.

[0069] The area of ​​the selected earthen pond was 5 mu. After draining, the pond was exposed to the sun for 20 days. The bottom of the pond was plowed mechanically with a plowing depth of 10-20 cm. Groundwater was introduced to make the water level reach 100 cm. Aquatic bait biological feed was evenly sprinkled at a dosage of 3 kg / mu per day. Samples were taken every day to detect the biomass of rotifers and cladocerans, and the cell density of algae species and dissolved oxygen content. The water temperature was 20-25°C during the experiment. The experimental time was 10 days. During the experiment, the number of cladocerans and rotifers showed a gradual increase as a whole. Figure 3 As shown, the zooplankton density reached a peak on the 10th day, with a maximum value of 3854 / L.

[0070] Example 4

[0071] The feed raw materials were weighed according to the ratios in Table 2, and mixed to obtain aquatic bait biological feed.

[0072] The area of ​​the selected earthen pond was 5 mu. After draining, the pond was exposed to the sun for 20 days. The bottom of the pond was plowed mechanically with a plowing depth of 10-20 cm. Groundwater was introduced to make the water level reach 100 cm. Aquatic bait biological feed was evenly sprinkled at a dosage of 3 kg / mu per day. Samples were taken every day to detect the biomass of rotifers and cladocerans, and the cell density of algae species and dissolved oxygen content. The water temperature was 20-25°C during the experiment. The experimental time was 10 days. During the experiment, the number of cladocerans and rotifers showed a gradual increase as a whole. Figure 4 As shown, the zooplankton density reached a peak on the 10th day, with a maximum value of 3136 / L.

[0073] Comparative Example 1

[0074] A 5-mu earthen pond was selected. After draining, the pond was exposed to the sun for 15 days. Groundwater was added to make the water level reach 100 cm. No bait was added. Samples were taken every day to test the biomass of rotifers and cladocerans. The water temperature during this period was 20-25°C. Figure 5 As shown, the maximum zooplankton density is 423 / L.

[0075] Comparative Example 2

[0076] The aquatic bait biological feed and application method in this comparative example are the same as those in Example 2, except that the daily usage is different. The daily usage of the feed in Comparative Example 2 is 2 kg / mu. Figure 6 As shown, the maximum zooplankton density is 1135 / L.

[0077] Comparative Example 3

[0078] The feed raw materials were weighed according to the ratios in Table 2, and mixed to obtain aquatic bait biological feed.

[0079] The area of ​​the selected earthen pond was 5 mu. After draining, the pond was exposed to the sun for 20 days. The bottom of the pond was plowed mechanically with a plowing depth of 10-20 cm. Groundwater was introduced to make the water level reach 100 cm. Aquatic bait and biological feed were evenly sprinkled at a rate of 3 kg / mu per day. Samples were taken every day to detect the biomass of rotifers and cladocerans, and the cell density and dissolved oxygen content of algae species were measured. The water temperature was 20-25°C during the experiment. The experimental time was 10 days. Figure 7 As shown, the maximum zooplankton density is 1884 / L.

[0080] Comparative Example 4

[0081] The feed raw materials were weighed according to the ratios in Table 2, and mixed to obtain aquatic bait biological feed.

[0082] The area of ​​the selected earthen pond was 5 mu. After draining, the pond was exposed to the sun for 20 days. The bottom of the pond was plowed mechanically with a plowing depth of 10-20 cm. Groundwater was introduced to make the water level reach 100 cm. Aquatic bait and biological feed were evenly sprinkled at a rate of 3 kg / mu per day. Samples were taken every day to detect the biomass of rotifers and cladocerans, and the cell density and dissolved oxygen content of algae species were measured. The water temperature was 20-25°C during the experiment. The experimental time was 10 days. Figure 8 As shown, the maximum zooplankton density is 2602 / L.

[0083] In addition to the zooplankton density of each embodiment and comparative example, the data analysis of the algae species diversity, algae cell density and dissolved oxygen content of each embodiment and comparative example is as follows:

[0084] like Fig. 9 As shown, the algae diversity index during the experiment was averaged and found that the algae diversity index in the embodiments was higher than that in the comparative examples, among which the algae diversity index in embodiment 2 was the highest, which was 2.2, and the algae diversity index in comparative example 3 was the lowest, which was 1.23. The above results show that the mixture can improve the algae biodiversity in aquaculture water.

[0085] like Fig.10 As shown, it is the mean value of algae cell density diversity during the experimental time. The mean value of algae cell density in the embodiment is greater than that in the comparative example. The maximum value is in embodiment 2, with a cell density of 2.321×10 6 cells / L, the minimum value is comparative example 4, and the cell density is 0.912×10 6 cells / L.

[0086] Fig.11 is the mean dissolved oxygen content during the experiment. A certain dissolved oxygen content in the water body is a prerequisite for the survival of aquatic animals. The mean dissolved oxygen content in Examples 1-4 and Comparative Examples 1-2 is greater than 5.4 mg / L, which can meet the needs of stocking seedlings. The dissolved oxygen content in Comparative Examples 3 and 4 is relatively low, 2.1 mg / L and 3.1 mg / L respectively. Under such dissolved oxygen conditions, the survival of aquatic animal seedlings may be threatened. Among them, in Comparative Example 3, due to the excessively high content of yeast hydrolyzate, the reproduction of aerobic bacteria is promoted, resulting in lower dissolved oxygen. In addition, yeast metabolites can promote the growth and reproduction of algae. The oxygen in the water body mainly comes from the photosynthesis of algae. Since Comparative Example 4 does not contain yeast metabolites, there is insufficient algae in the water body, resulting in insufficient oxygen production.

[0087] From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects: the particle size of the ingredients in the aquatic bait biological feed of the present application is appropriate, with good water solubility and good suspension, and can be directly ingested by zooplankton such as rotifers and cladocerans, and can be easily digested and absorbed by zooplankton, without the problem of pathogenic bacteria and drug residues. Moreover, the preparation of the feed of the present application does not require fermentation, and can be directly mixed and used, which simplifies the operation process and improves production efficiency. In addition, the yeast metabolites in the feed of the present application contain certain inorganic nutrients, which can promote the rapid growth of algae, and further promote the growth of bait organisms, and can further obtain a large number of bait organisms for use as fry starter feed.

[0088] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A kind of aquatic bait biological feed, characterized in that: The aquatic bait biological feed includes: yeast raw material, amino acid raw powder and feed-grade fish oil; Wherein, the yeast raw material is selected from at least one of the following: yeast metabolites, yeast powder, yeast hydrolyzate or yeast cell wall dry powder.

2. The aquatic bait biological feed according to claim 1, characterized in that: When the yeast raw material is a combination of the yeast metabolite, the yeast powder, the yeast hydrolyzate and the yeast cell wall dry powder, Calculated by mass fraction, the aquatic bait biological feed comprises: 10-15% of the yeast metabolites, 5-10% of the yeast powder, 57-70% of the yeast cell wall dry powder, 1-5% of the yeast hydrolyzate, 5-15% of the amino acid raw powder and 0.1-0.5% of feed-grade fish oil.

3. A method for preparing aquatic bait biological feed according to claim 1 or 2, characterized in that: The preparation method comprises: The yeast raw material, amino acid raw powder and feed-grade fish oil are mixed in a solid state according to a certain proportion to obtain the aquatic bait biological feed.

4. Use of the aquatic bait biological feed according to claim 1 or 2 or the aquatic bait biological feed prepared by the preparation method according to claim 3 in bait biological breeding.

5. The use according to claim 4, characterized in that: The application includes: directly putting the aquatic bait biological feed into a breeding pond for breeding the bait biological feed.

6. The use according to claim 5, characterized in that: The dosage of the aquatic bait biological feed is: 3-4 kg per mu per day.

7. The use according to claim 5, characterized in that: The temperature for carrying out the bait organism cultivation is 20-28°C.

8. The use according to claim 4, characterized in that: The bait organisms include algae, rotifers and cladocerans.

9. The use according to claim 5, characterized in that: When the bait organisms are cultured, the culture pond must be drained and dried before water is introduced into the culture pond to culture the bait organisms. Preferably, the drying time of the pond is 15-30 days.

10. The use according to claim 9, characterized in that: The water includes groundwater or external pond water filtered through a 70-80 mesh silk sieve; Preferably, the water depth of the culture pond is 50-100 cm; Preferably, the area of ​​the breeding pond is 3-5 mu.

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