Method for regulating aquaculture water quality in shrimp and shellfish polyculture mode

Abstract

The invention provides a method for regulating aquaculture water quality in a shrimp and shellfish polyculture mode, and belongs to the technical field of aquaculture. The method comprises the following steps: establishing a bacteria-algae synergistic system capable of regulating water quality, and providing microencapsulated aquaculture baits capable of slowing down deterioration of water quality, wherein the bacteria-algae synergistic system comprises an algae system attached to a porous carrier and a biofloc system with an added carbon source skeleton, the microencapsulated culture baits include a porous pellet core to which lipids are attached under vacuum, and a biodegradable polymer coating film covering the pellet core, and the thickness of the coating film is 1 nanometer or more and 1 micron or less. According to the method provided by the invention, a zero-water exchange effect is achieved by combining the synergistic effect of baits and the bacteria-algae system, and the hydrophobicity of the baits can be improved, so that the baits are not disintegrated, the carbon source cost of the biofloc system is reduced, the volume concentration of bioflocs and the concentration oftotal suspended solids are improved, and the content of Omega-3 fatty acid in an organism and the component content and activity of immune molecules such as phenol oxidase and hemolysin are improved.

Description

technical field

[0001] The invention belongs to the technical field of aquaculture, and in particular relates to a method for adjusting the water quality of aquaculture under the mixed cultivation mode of shrimp and shellfish. Background technique

[0002] my country is a big aquaculture country. With the development of intensive aquaculture, the polyculture mode is mainly adopted. In this mode, the growth needs of the main fish and rare fish are first met, and a large amount of high-protein bait is fed to make it grow rapidly. The breeding cycle is shortened, the market is launched as soon as possible, and the purpose of maximum economic benefit is achieved. However, under such feeding and management conditions, it is easy to ignore the growth needs of other mixed animals, resulting in serious deterioration of the water body in the later stage of breeding. At the same time, the demand for bait in this mode is increasing day by day. The utilization rate of bait in the tradit...

Examples

Embodiment 1

[0040] The method for regulating water quality in shrimp and shellfish polyculture includes establishing a synergistic system of bacteria and algae capable of regulating water quality, and providing microencapsulated culture bait capable of slowing down the deterioration of water quality; the synergistic system of bacteria and algae is included on a porous carrier An epiphytic algae system and a biofloc system with a carbon source skeleton added; the above-mentioned microencapsulated culture bait includes a porous core with lipids under vacuum, and a film of a biodegradable polymer covering the core, The thickness of the film is not less than 1 nanometer and not more than 1 micrometer. In the shrimp-shell polyculture mode, the bait meets the growth needs of the shrimp, and the remaining bait and shrimp excrement are used as the shellfish bait, which significantly increases the utilization rate of the bait in the culture pond. At the same time, the feeding of shellfish purifies...

Embodiment 2

[0060] The method for regulating the water quality of aquaculture under the polyculture mode of shrimp and shellfish, the specific measures are as follows:

[0061] (1) Take 25% water, 50% oil, 20% gelatin and 5% oil-soluble components by weight, and then homogeneously obtain lipids under the condition that the temperature is 45°C and the rotating speed is 300r / min Gel, the above-mentioned oil-soluble ingredients include oil-soluble vitamins and carotenoids in equal proportions;

[0062] (2) Extrude and granulate the water-soluble nutrients to form granules suitable for transportation or storage with a water content of 5%, and then introduce the lipid gel under vacuum conditions with a temperature of 50°C and a pressure of 0.3bar and mixed with the particles, and then slowly release the vacuum to form a porous core. The above-mentioned water-soluble nutrients include protein, sugar, pantothenic acid and niacin, and the weight ratio is 5:2.5:0.5:0.3. The above-mentioned water-s...

Embodiment 3

[0069] The other steps of this example are consistent with those of Example 2, except that triallylamine and methyl oleate are not added to the organic solvent used in step (3).

technical field

[0001] The invention belongs to the technical field of aquaculture, and in particular relates to a method for adjusting the water quality of aquaculture under the mixed cultivation mode of shrimp and shellfish. Background technique

[0002] my country is a big aquaculture country. With the development of intensive aquaculture, the polyculture mode is mainly adopted. In this mode, the growth needs of the main fish and rare fish are first met, and a large amount of high-protein bait is fed to make it grow rapidly. The breeding cycle is shortened, the market is launched as soon as possible, and the purpose of maximum economic benefit is achieved. However, under such feeding and management conditions, it is easy to ignore the growth needs of other mixed animals, resulting in serious deterioration of the water body in the later stage of breeding. At the same time, the demand for bait in this mode is increasing day by day. The utilization rate of bait in the tradit...

Examples

Embodiment 1

[0040] The method for regulating water quality in shrimp and shellfish polyculture includes establishing a synergistic system of bacteria and algae capable of regulating water quality, and providing microencapsulated culture bait capable of slowing down the deterioration of water quality; the synergistic system of bacteria and algae is included on a porous carrier An epiphytic algae system and a biofloc system with a carbon source skeleton added; the above-mentioned microencapsulated culture bait includes a porous core with lipids under vacuum, and a film of a biodegradable polymer covering the core, The thickness of the film is not less than 1 nanometer and not more than 1 micrometer. In the shrimp-shell polyculture mode, the bait meets the growth needs of the shrimp, and the remaining bait and shrimp excrement are used as the shellfish bait, which significantly increases the utilization rate of the bait in the culture pond. At the same time, the feeding of shellfish purifies...

Embodiment 2

[0060] The method for regulating the water quality of aquaculture under the polyculture mode of shrimp and shellfish, the specific measures are as follows:

[0061] (1) Take 25% water, 50% oil, 20% gelatin and 5% oil-soluble components by weight, and then homogeneously obtain lipids under the condition that the temperature is 45°C and the rotating speed is 300r / min Gel, the above-mentioned oil-soluble ingredients include oil-soluble vitamins and carotenoids in equal proportions;

[0062] (2) Extrude and granulate the water-soluble nutrients to form granules suitable for transportation or storage with a water content of 5%, and then introduce the lipid gel under vacuum conditions with a temperature of 50°C and a pressure of 0.3bar and mixed with the particles, and then slowly release the vacuum to form a porous core. The above-mentioned water-soluble nutrients include protein, sugar, pantothenic acid and niacin, and the weight ratio is 5:2.5:0.5:0.3. The above-mentioned water-s...

Embodiment 3

[0069] The other steps of this example are consistent with those of Example 2, except that triallylamine and methyl oleate are not added to the organic solvent used in step (3).

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