Method for improving quality of fresh aquatic products

Abstract

The invention discloses a method for improving the quality of fresh and live aquatic products, which can effectively repair and condition fish bodies, reduce fat and shape and reduce the stress response of fish through a sectional type running water mode and treatment of a hydrogen-rich high-density circulating water culture system, improves the survival rate, improves the meat quality of the fish and reduces the content of fishy substances.

Description

(I) Technical field

[0001] The invention belongs to the field of biological breeding, and particularly relates to a method for improving the quality of fresh aquatic products. (II) Background technology

[0002] The main sales methods of aquatic products are cold fresh sales and live fresh sales. Influenced by traditional concepts, Chinese consumers prefer live fresh aquatic products, so live fresh sales can create greater profit margins and economic value. However, when live fresh aquatic products are transported from coastal breeding sites to sales sites, they are exposed to various stress factors such as deteriorating water quality, noise, and narrow space during the transportation process. These factors will increase the stress level in aquatic products. When fish suffer from oxidative stress, the body produces excessive reactive oxygen free radicals. When it exceeds the clearance capacity of the antioxidant system, it will cause an imbalance in the redox system, thereby damaging DNA, leading to protein degradation and lipid peroxidation, further damaging tissues and organs, and causing low survival rates and reduced taste of aquatic products.

[0003] Hydrogen, a colorless, odorless and tasteless gas, is considered to be physiologically inert. It can be transported across the membrane by free diffusion. It can pass through the cell membrane to reach the cytoplasm without the need for energy from the cell, and effectively eliminate reactive oxygen free radicals.

[0004] Therefore, it is necessary to find a method to solve the stress response of fresh aquatic products during breeding and transportation, which leads to reduced survival rate and quality. (III) Summary of the invention

[0005] The purpose of the present invention is to provide a method for improving the quality of fresh aquatic products, which solves the current problems of low survival rate of fish and decreased meat taste due to stress response.

[0006] The technical solution adopted by the present invention is:

[0007] The present invention provides a method for improving the quality of fresh aquatic products, the method comprising the following steps:

[0008] (1) Add fresh water to the fish pond, then add 90-110 catties of sea salt, 200-300 g of multivitamin complex, and 200-300 g of Vitamin C for every 6 cubic meters of water;

[0009] (2) Repair: Put the broodstock into the fish storage pond of step (1), open the hydrogen-rich circulating water device on the 1st to 3rd day and add 10-20mL Junmeijing for every 6 cubic meters of water; close the hydrogen-rich circulating water device on the 4th to 6th day and add 90-110 catties of sea salt and 90-110g of Sanhuang for every 6 cubic meters of water; open the hydrogen-rich circulating water device on the 7th to 9th day and add 90-110 catties of sea salt and 5-15mL of Shuizuan for every 6 cubic meters of water; close the hydrogen-rich circulating water device on the 10th to 12th day and add 90-110 catties of sea salt and 5-15mL of Yuerhuan for every 6 cubic meters of water;

[0010] (3) Conditioning: On the 13th day, add 90-110 catties of sea salt and 150-250 g of multivitamin complex to every 6 cubic meters of water;

[0011] (4) Fat loss and body shaping: On the 14th to 18th day, the hydrogen-rich circulating water device was turned on, and on the 14th to 16th day, 10 to 20 mL of Junmeijing was added to every 6 cubic meters of water, and on the 17th to 18th day, 150 to 250 g of compound multivitamin was added to every 6 cubic meters of water; on the 19th to 28th day, the hydrogen-rich circulating water device was turned off, and on the 19th to 21st day, 90 to 110 catties of sea salt and 90 to 110 g of Sanhuang were added to every 6 cubic meters of water; on the 22nd to 24th day, 90 to 110 catties of sea salt and 5 to 15 mL of Shuizuan were added to every 6 cubic meters of water; on the 25th to 27th day, 90 to 110 catties of sea salt and 5 to 15 mL of Yuerhuan were added to every 6 cubic meters of water; on the 28th day, 90 to 110 catties of sea salt and 150 to 250 g of Yuerhuan were added to every 6 cubic meters of water Compound multidimensional; on the 29th to 33rd day, turn on the hydrogen-rich circulating water device, and on the 29th to 31st day, add 10-20mL Junmeijing to every 6 cubic meters of water; on the 32nd to 33rd day, add 150-250g compound multidimensional to every 6 cubic meters of water; on the 34th to 43rd day, turn off the hydrogen-rich circulating water device, and on the 34th to 36th day, add 90-110 kilograms of sea salt and 90-110g of Sanhuang to every 6 cubic meters of water; on the 37th to 39th day, add 90-110 kilograms of sea salt and 5-15mL of Shuizuan to every 6 cubic meters of water; on the 40th to 42nd day, add 90-110 kilograms of sea salt and 5-15mL of Yuerhuan to every 6 cubic meters of water; on the 43rd day, add 90-110 kilograms of sea salt and 150-250g compound multidimensional to every 6 cubic meters of water.

[0012] Furthermore, in step (1), 100 catties of sea salt, 250 g of compound multivitamin, and 250 g of Vc stress relief are added to every 6 cubic meters of water.

[0013] Further, the seed fish in step (2) are cultured and obtained according to the following steps:

[0014] a. Seedling selection: Select conventional fish (preferably the four major carps: grass carp, black carp, silver carp and bighead carp) that are strong, vigorous, of appropriate size and uniform in size, and mix and match them for stocking, taking advantage of the different feeding habits and spatial distribution of fish, and making full use of bait resources and water space;

[0015] b. Release time: In the first half of the year, after April, the temperature is stable above 20℃; in the second half of the year, before the fish stop eating in November, water can be added to the fish ditch to release the fry for breeding; stocking should be done in the morning on a sunny day to avoid rainy weather.

[0016] c. Stocking density: The stocking density is determined according to the size of the fish ditch, water source conditions, planned production and technical management level. The planned production is 100-200kg / 667m 2 Stocking (preferably 150kg / 667m 2 ).

[0017] Furthermore, in step (2), 400-600 kg, preferably 500 kg, of broodstock are placed in every 6 cubic meters of water. The average weight of the broodstock is 2.5 kg.

[0018] Furthermore, in step (2), 15 mL of Junmeijing is added to every 6 cubic meters of water on days 1 to 3; 100 catties of sea salt and 100 g of Sanhuang are added to every 6 cubic meters of water on days 4 to 6; 100 catties of sea salt and 10 mL of Shuizuan are added to every 6 cubic meters of water on days 7 to 9; and 100 catties of sea salt and 10 mL of Yuerhuan are added to every 6 cubic meters of water on days 10 to 12.

[0019] Furthermore, in step (3), on the 13th day, 100 catties of sea salt and 200 g of multivitamin complex are added to every 6 cubic meters of water.

[0020] Further, in step (4), 15 mL of Junmeijing is added to every 6 cubic meters of water on days 14 to 16; 200 g of compound multivitamin is added to every 6 cubic meters of water on days 17 to 18; 100 catties of sea salt and 100 g of Sanhuang are added to every 6 cubic meters of water on days 19 to 21; 100 catties of sea salt and 10 mL of Shuizuan are added to every 6 cubic meters of water on days 22 to 24; 100 catties of sea salt and 10 mL of Yuerhuan are added to every 6 cubic meters of water on days 25 to 27; 100 catties of sea salt and 20 mL of Yuerhuan are added to every 6 cubic meters of water on day 28; 0g of compound multivitamin; on the 29th to 31st day, Junmeijing is added to every 6 cubic meters of water; on the 32nd to 33rd day, 200g of compound multivitamin is added to every 6 cubic meters of water; on the 34th to 36th day, 100 jin of sea salt and 100g of Sanhuang are added to every 6 cubic meters of water; on the 37th to 39th day, 100 jin of sea salt and 10mL of Shuizuan are added to every 6 cubic meters of water; on the 40th to 42nd day, 100 jin of sea salt and 10mL of Yuerhuan are added to every 6 cubic meters of water; on the 43rd day, 100 jin of sea salt and 200g of compound multivitamin are added to every 6 cubic meters of water.

[0021] The compound multivitamin described in the present invention includes vitamin A, vitamin E, B vitamins, and a nutritional enhancer, glucose, etc.; Vc Yingjiling includes L-ascorbic acid, sodium sulfate, and glucose; Junmeijing includes gallic acid; Sanhuang includes Scutellaria baicalensis, Phellodendron chinense, Rhubarb, and Isatis indigotica; Shuizu'an includes 1,8-cineole and menthol; Yuerhuan includes a natural plant eucalyptus extract; the compound multivitamin, Vc Yingjiling, Junmeijing, Sanhuang, Shuizu'an, and Yuerhuan are preferably purchased from Ganzhou Pailunmei Biotechnology Co., Ltd.

[0022] The hydrogen-rich circulating water device of the present invention adopts the known method in the art to ionize fresh water or seawater to produce hydrogen to form hydrogen-rich circulating water. Usually, a protein separator commonly used in freshwater / seawater is used, and a needle brush pump is used to convert fresh water into micro-bubble fresh water. First, the freshwater / seawater organic matter is filtered, and then a three-stage filtration system containing rattan cotton / 3D filter cotton / activated carbon / ultraviolet lamp is used for filtration, and finally, a nano-high-pressure hydrogen dissolving system containing an electrolytic hydrogen system / high-pressure hydrogen mixing system / nano bubble module / intelligent module is used for treatment; the specific operation is as follows: start the protein separator, and the rotation of the needle brush pump generates a large number of tiny bubbles. The adsorption effect generated by the ions and tension on the surface of the bubbles takes away organic matter such as suspended particles, residual bait and excrement in the water. As more and more microbubbles are generated, the bubbles that accumulate dirt will be continuously pushed to the collection cup at the top and discharged. The water after protein separation is transported to the filter tank through the water inlet pipe. The anti-blocking component can prevent the large impurities contained in the circulating water from clogging the water inlet pipe. After the circulating water enters the first filter tank through the water inlet pipe, the filter cotton filters the circulating water once to absorb the particulate impurities in the circulating water. Then the circulating water overflows the first filter tank and flows into the second filter tank. The activated carbon in the second filter tank performs a secondary filtration on the circulating water to decolorize, deodorize, decyanate, remove organic matter, heavy metals, bacteria, etc. Then the circulating water enters the third filter tank through the water hole. The ultraviolet lamp in the third filter tank is used for photolysis to remove chlorine and chloramine substances in the water and inactivate microorganisms. The circulating water is ionized into hydrogen by the electrolysis system, and then the hydrogen is dissolved in the water by high pressure to form a complete hydrogen-rich circulating water system.

[0023] Compared with the prior art, the beneficial effects of the present invention are mainly reflected in:

[0024] The aquaculture drugs used in the present invention include sea salt, three yellows (including scutellaria baicalensis, phellodendron chinense, rhubarb, and isatis indigotica), Shuizu'an (including 1,8-cineole and menthol) and Yu'erhuan (including natural plant eucalyptus extract), etc., which can effectively disinfect and kill insects in the breeding environment; at the same time, the fish recovered from the external pond breeding are fed with compound multivitamins (including vitamin A, vitamin E, and B vitamins) and Vc Yingjiling (including nutrient enhancers glucose, L-ascorbic acid, and sodium sulfate), etc., and are treated through a segmented flow mode and a hydrogen-rich high-density circulating water breeding system, which can effectively repair and condition the fish body, reduce fat and shape the fish, reduce the stress response of the fish, improve the survival rate, and at the same time, the meat quality of the fish is improved and the content of fishy substances is reduced. (IV) Description of the drawings

[0025] Figure 1 It is a standard fishery operation system.

[0026] Figure 2 It is a hydrogen-rich high-density circulating water aquaculture system. (V) Specific implementation methods

[0027] The present invention is further described below in conjunction with specific embodiments, but the protection scope of the present invention is not limited thereto:

[0028] The breeding fish used in the embodiment of the present invention are healthy and disease-free bighead carp cultured in an outdoor pond, with complete fish scales and no obvious damage or lesions; no parasites on the body surface, active swimming, sensitive reaction, and the ability to quickly avoid interference; the fish body color is normal, without abnormal fading or discoloration; the gill filaments are bright red and uniform, without rot, whitening or blackening; meet the specifications of commercial fish, with moderate weight and no obvious abdominal hypertrophy.

[0029] Compound multivitamin, Vc Yingjiling, Junmeijing, Sanhuang, Shuizuan, and Yuerhuan were all purchased from Ganzhou Pailunmei Biotechnology Co., Ltd.

[0030] The Plus C texture analyzer was used for the full texture analysis. The organ index is the ratio of the weight of the organ to its body weight. The moisture content was determined using the MS-70 rapid moisture analyzer, the crude protein content was determined using the K9860 fully automatic Kjeldahl nitrogen analyzer, the crude fat content was determined using the SOX406 fat analyzer, and the crude ash content was determined using the KSL-1200X muffle furnace. Hexanal, octanal, heptanal, and pentadecane were determined using the Trace1300-ISQ gas chromatography-mass spectrometer.

[0031] The hydrogen-rich circulating water device was purchased from Shanghai Yidun Machinery Co., Ltd., model LON-1.

[0032] Example 1: Effect of hydrogen-rich circulating water on fish quality

[0033] 1. The quality of bighead carp meat on the 0th, 20th and 40th days after temporarily raising them in hydrogen-rich circulating water

[0034] (1) Add 6 cubic meters of fresh water to an 8 cubic meter fish storage pond, then add 100 kilograms of sea salt, 250 grams of multivitamins, and 250 grams of Vc stress relief agent. At the same time, turn on the hydrogen-rich circulating water device and put in 500 kilograms of bighead carp with an average weight of 2.5 kilograms. This is Day 0.

[0035] (2) Repair: On the 1st to 3rd day, open the hydrogen-rich circulating water device and add 15mL of Junmeijing to every 6 cubic meters of water; on the 4th to 6th day, close the hydrogen-rich circulating water device and add 100 jin of sea salt and 100g of Sanhuang to every 6 cubic meters of water; on the 7th to 9th day, open the hydrogen-rich circulating water device and add 100 jin of sea salt and 10mL of Shuizuan to every 6 cubic meters of water; on the 10th to 12th day, close the hydrogen-rich circulating water device and add 100 jin of sea salt and 10mL of Yuerhuan to every 6 cubic meters of water;

[0036] (3) Conditioning: On the 13th day, add 100 catties of sea salt and 200 g of multivitamin complex to every 6 cubic meters of water;

[0037] (4) Fat loss and body shaping: On the 14th to 18th day, the hydrogen-rich circulating water device was turned on, and on the 14th to 16th day, 15 mL of Junmeijing was added to every 6 cubic meters of water; on the 17th to 18th day, 200 g of compound multivitamin was added to every 6 cubic meters of water; on the 19th to 28th day, the hydrogen-rich circulating water device was turned off, and on the 19th to 21st day, 100 catties of sea salt and 100 g of Sanhuang were added to every 6 cubic meters of water; on the 22nd to 24th day, 100 catties of sea salt and 10 mL of Shuizuan were added to every 6 cubic meters of water; on the 25th to 27th day, 100 catties of sea salt and 10 mL of Yuerhuan were added to every 6 cubic meters of water; on the 28th day, 100 catties of sea salt and 20 mL of Yuerhuan were added to every 6 cubic meters of water 0g compound multidimensional; on the 29th to 33rd day, turn on the hydrogen-rich circulating water device, and on the 29th to 31st day, add Junmeijing to every 6 cubic meters of water; on the 32nd to 33rd day, add 200g compound multidimensional to every 6 cubic meters of water; on the 34th to 43rd day, turn off the hydrogen-rich circulating water device, and on the 34th to 36th day, add 100 kilograms of sea salt and 100g of Sanhuang to every 6 cubic meters of water; on the 37th to 39th day, add 100 kilograms of sea salt and 10mL of Shuizuan to every 6 cubic meters of water; on the 40th to 42nd day, add 100 kilograms of sea salt and 10mL of Yuerhuan to every 6 cubic meters of water; on the 43rd day, add 100 kilograms of sea salt and 200g compound multidimensional to every 6 cubic meters of water.

[0038] Fish were sampled at day 0, 20 and 40, and the weight, length and back thickness of the fish were measured at the thickest part between the bilateral lateral lines; the back muscles of the fish were cut into pieces of 3 cm × 2 cm × 1 cm in length, width and thickness for the whole texture analysis of average hardness, average viscosity, average elasticity, average cohesion, average resilience and average chewiness; the liver, kidney and heart were removed and rinsed with saline, weighed after absorbing water, and the organ indexes were calculated: heart index, liver index and kidney index; the back muscles of different parts of the fish were washed, the surface water was absorbed with absorbent paper, chopped and mixed, and the water content, crude protein, crude fat, crude ash content and volatile flavor substances (fishy compounds hexanal, octanal, heptaldehyde and pentadecane) were evaluated. The results are shown in Tables 1 and 2.

[0039] 2. The quality of bighead carp meat on the 0th, 20th and 40th days after the hydrogen-rich circulating water was turned off

[0040] The hydrogen-rich circulating water device in step 1 was completely shut down, and other operations and conditions were the same as step 1. The results are shown in Tables 3 and 4.

[0041] The results in Tables 1 and 2 show that after the hydrogen-rich circulating water device was turned on, the overall quality of the fish was improved after the repair conditioning, fat reduction and shaping processes. The average weight dropped from 2.44kg to 2.15kg, and the corresponding organ index also decreased. In terms of texture, the average hardness and average chewiness were significantly reduced. In terms of nutrients and flavor substances, the fat content decreased significantly. In addition, the fishy flavor compounds such as hexanal, octanal, heptanal, and pentadecane were significantly reduced. This series of results shows that the breeding method can effectively reduce fat and shape the fish, making the fish meat more tender and the fishy value lower.

[0042] The results in Tables 3 and 4 show that in the group with the hydrogen-rich circulating water device turned off, the amount of exercise of bighead carp decreased significantly due to the lack of water flow. From 0 days to 40 days, the average body weight showed an upward trend, from the original 2.44kg to 2.67kg, and the corresponding organ index increased accordingly; in terms of texture, the average hardness and average chewiness both showed a significant increase. In terms of nutrients and flavor substances, the fat content increased significantly, and the fishy flavor compounds such as hexanal, octanal, heptanal, and pentadecane decreased much less than the group with the hydrogen-rich circulating water device turned on.

[0043] Table 1. Texture analysis

[0044]

[0045] Table 2. Organ index, moisture content, protein content, fat content, ash content, and volatile flavor substances

[0046]

[0047] Table 3. Texture analysis

[0048]

[0049] Table 4. Organ index, moisture content, protein content, fat content, ash content, and volatile flavor substances

[0050]

[0051]

[0052] Example 2: Effect of drug concentration on fish quality

[0053] 1. Fish quality of bighead carp at 0, 20 and 40 days under low concentration components

[0054] (1) Add 6 cubic meters of fresh water to an 8 cubic meter fish storage pond, then add 90 kilograms of sea salt, 200 grams of multivitamin complex, and 200 grams of Vc stress relief agent. At the same time, turn on the hydrogen-rich circulating water device and put in 500 kilograms of bighead carp with an average weight of 2.5 kilograms. This is Day 0.

[0055] (2) Repair: On the 1st to 3rd day, open the hydrogen-rich circulating water device and add 10mL of Junmeijing to every 6 cubic meters of water; on the 4th to 6th day, close the hydrogen-rich circulating water device and add 90 catties of sea salt and 90g of Sanhuang to every 6 cubic meters of water; on the 7th to 9th day, open the hydrogen-rich circulating water device and add 90 catties of sea salt and 5mL of Shuizuan to every 6 cubic meters of water; on the 10th to 12th day, close the hydrogen-rich circulating water device and add 90 catties of sea salt and 5mL of Yuerhuan to every 6 cubic meters of water;

[0056] (3) Conditioning: On the 13th day, add 90 catties of sea salt and 150 g of multivitamin complex to every 6 cubic meters of water;

[0057] (4) Fat loss and body shaping: On the 14th to 18th day, the hydrogen-rich circulating water device was turned on, and on the 14th to 16th day, 10 mL of Junmeijing was added to every 6 cubic meters of water; on the 17th to 18th day, 150 g of compound multidimensional was added to every 6 cubic meters of water; on the 19th to 28th day, the hydrogen-rich circulating water device was turned off, and on the 19th to 21st day, 90 catties of sea salt and 90 g of Sanhuang were added to every 6 cubic meters of water; on the 22nd to 24th day, 90 catties of sea salt and 5 mL of Shuizuan were added to every 6 cubic meters of water; on the 25th to 27th day, 90 catties of sea salt and 5 mL of Yuerhuan were added to every 6 cubic meters of water; on the 28th day, 90 catties of sea salt and 20 mL of Yuerhuan were added to every 6 cubic meters of water 0g compound multidimensional; on the 29th to 33rd day, the hydrogen-rich circulating water device was turned on, and Junmeijing was added to every 6 cubic meters of water on the 29th to 31st day; on the 32nd to 33rd day, 150g compound multidimensional was added to every 6 cubic meters of water; on the 34th to 43rd day, the hydrogen-rich circulating water device was turned off, and on the 34th to 36th day, 90 kilograms of sea salt and 90g of Sanhuang were added to every 6 cubic meters of water; on the 37th to 39th day, 90 kilograms of sea salt and 5mL of Shuizuan were added to every 6 cubic meters of water; on the 40th to 42nd day, 90 kilograms of sea salt and 5mL of Yuerhuan were added to every 6 cubic meters of water; on the 43rd day, 90 kilograms of sea salt and 150g compound multidimensional were added to every 6 cubic meters of water.

[0058] Fish were sampled at day 0, 20 and 40, and the weight, length and back thickness of the fish were measured at the thickest part between the bilateral lateral lines; the back muscles of the fish were cut into pieces of 3 cm × 2 cm × 1 cm in length, width and thickness for the whole texture analysis of average hardness, average viscosity, average elasticity, average cohesion, average resilience and average chewiness; the liver, kidney and heart were removed and rinsed with saline, weighed after absorbing water, and the organ indexes were calculated: heart index, liver index and kidney index; the back muscles of different parts of the fish were washed, the surface water was absorbed with absorbent paper, chopped and mixed, and the water content, crude protein, crude fat, crude ash content and volatile flavor substances (fishy compounds hexanal, octanal, heptaldehyde and pentadecane) were evaluated. The results are shown in Tables 5 and 6.

[0059] 2. Fish quality of bighead carp at 0, 20 and 40 days under high concentration components

[0060] (1) Add 6 cubic meters of fresh water to an 8 cubic meter fish storage pond, then add 110 kilograms of sea salt, 300 grams of multivitamins, and 300 grams of Vc stress relief agent. At the same time, turn on the hydrogen-rich circulating water device and put in 500 kilograms of bighead carp with an average weight of 2.5 kilograms. This is Day 0.

[0061] (2) Repair: On the 1st to 3rd day, open the hydrogen-rich circulating water device and add 20mL of Junmeijing to every 6 cubic meters of water; on the 4th to 6th day, close the hydrogen-rich circulating water device and add 110 catties of sea salt and 110g of Sanhuang to every 6 cubic meters of water; on the 7th to 9th day, open the hydrogen-rich circulating water device and add 110 catties of sea salt and 15mL of Shuizuan to every 6 cubic meters of water; on the 10th to 12th day, close the hydrogen-rich circulating water device and add 110 catties of sea salt and 15mL of Yuerhuan to every 6 cubic meters of water;

[0062] (3) Conditioning: On the 13th day, add 110 catties of sea salt and 250 g of multivitamin complex to every 6 cubic meters of water;

[0063] (4) Fat loss and body shaping: On the 14th to 18th day, the hydrogen-rich circulating water device was turned on, and on the 14th to 16th day, 20 mL of Junmeijing was added to every 6 cubic meters of water; on the 17th to 18th day, 250 g of compound multivitamin was added to every 6 cubic meters of water; on the 19th to 28th day, the hydrogen-rich circulating water device was turned off, and on the 19th to 21st day, 110 catties of sea salt and 110 g of Sanhuang were added to every 6 cubic meters of water; on the 22nd to 24th day, 110 catties of sea salt and 15 mL of Shuizuan were added to every 6 cubic meters of water; on the 25th to 27th day, 110 catties of sea salt and 15 mL of Yuerhuan were added to every 6 cubic meters of water; on the 28th day, 110 catties of sea salt and 30 mL of Yuerhuan were added to every 6 cubic meters of water 0g compound multidimensional; on the 29th to 33rd day, the hydrogen-rich circulating water device was turned on, and Junmeijing was added to every 6 cubic meters of water on the 29th to 31st day; on the 32nd to 33rd day, 250g compound multidimensional was added to every 6 cubic meters of water; on the 34th to 43rd day, the hydrogen-rich circulating water device was turned off, and on the 34th to 36th day, 110 kilograms of sea salt and 110g of Sanhuang were added to every 6 cubic meters of water; on the 37th to 39th day, 110 kilograms of sea salt and 15mL of Shuizuan were added to every 6 cubic meters of water; on the 40th to 42nd day, 110 kilograms of sea salt and 15mL of Yuerhuan were added to every 6 cubic meters of water; on the 43rd day, 110 kilograms of sea salt and 250g compound multidimensional were added to every 6 cubic meters of water.

[0064] Fish were sampled at day 0, 20 and 40, and the weight, length and back thickness of the fish were measured at the thickest part between the bilateral lateral lines; the back muscles of the fish were cut into pieces of 3 cm × 2 cm × 1 cm in length, width and thickness for the whole texture analysis of average hardness, average viscosity, average elasticity, average cohesion, average resilience and average chewiness; the liver, kidney and heart were removed and rinsed with saline, weighed after absorbing water, and the organ indexes were calculated: heart index, liver index and kidney index; the back muscles of different parts of the fish were washed, the surface water was absorbed with absorbent paper, chopped and mixed, and the water content, crude protein, crude fat, crude ash content and volatile flavor substances (fishy compounds hexanal, octanal, heptanal and pentadecane) were evaluated. The results are shown in Tables 7 and 8.

[0065] The results in Tables 5, 6, 7 and 8 show that in a high-concentration component environment, after the bighead carp has undergone repair conditioning, fat reduction and shaping, the overall quality of the fish has been improved. Compared with the low-concentration component environment, on the 40th day, the average body weight differed by 0.11 kg, and the corresponding organ index also decreased. In terms of texture, the average hardness and average chewiness were significantly reduced. In terms of nutrients and flavor substances. In addition, the fishy flavor compounds hexanal, octanal, heptanal, pentadecane, etc. were significantly reduced. This series of results shows that the breeding method can effectively reduce fat and shape the fish, so that the fish meat is more tender and the fishy value is lower.

[0066] Table 5. Texture analysis

[0067]

[0068] Table 6. Organ index, moisture content, protein content, fat content, ash content, and volatile flavor substances

[0069]

[0070] Table 7. Texture analysis

[0071]

[0072] Table 8. Organ index, moisture content, protein content, fat content, ash content, and volatile flavor substances

[0073]

[0074]

Claims

1. A method for improving the quality of fresh aquatic products, characterized in that: The method comprises the following steps: (1) Add fresh water to the fish pond, then add 90-110 catties of sea salt, 200-300 g of multivitamin complex, and 200-300 g of Vitamin C for every 6 cubic meters of water; (2) Repair: Put the broodstock into the fish storage pond of step (1), open the hydrogen-rich circulating water device on the 1st to 3rd day and add 10-20mL Junmeijing for every 6 cubic meters of water; close the hydrogen-rich circulating water device on the 4th to 6th day and add 90-110 catties of sea salt and 90-110g of Sanhuang for every 6 cubic meters of water; open the hydrogen-rich circulating water device on the 7th to 9th day and add 90-110 catties of sea salt and 5-15mL of Shuizuan for every 6 cubic meters of water; close the hydrogen-rich circulating water device on the 10th to 12th day and add 90-110 catties of sea salt and 5-15mL of Yuerhuan for every 6 cubic meters of water; (3) Conditioning: On the 13th day, add 90-110 catties of sea salt and 150-250 g of multivitamin complex to every 6 cubic meters of water; (4) Fat loss and body shaping: On the 14th to 18th day, the hydrogen-rich circulating water device was turned on, and on the 14th to 16th day, 10 to 20 mL of Junmeijing was added to every 6 cubic meters of water, and on the 17th to 18th day, 150 to 250 g of compound multivitamin was added to every 6 cubic meters of water; on the 19th to 28th day, the hydrogen-rich circulating water device was turned off, and on the 19th to 21st day, 90 to 110 catties of sea salt and 90 to 110 g of Sanhuang were added to every 6 cubic meters of water; on the 22nd to 24th day, 90 to 110 catties of sea salt and 5 to 15 mL of Shuizuan were added to every 6 cubic meters of water; on the 25th to 27th day, 90 to 110 catties of sea salt and 5 to 15 mL of Yuerhuan were added to every 6 cubic meters of water; on the 28th day, 90 to 110 catties of sea salt and 150 to 250 g of Yuerhuan were added to every 6 cubic meters of water Compound multidimensional; on the 29th to 33rd day, turn on the hydrogen-rich circulating water device, and on the 29th to 31st day, add 10-20mL Junmeijing to every 6 cubic meters of water; on the 32nd to 33rd day, add 150-250g compound multidimensional to every 6 cubic meters of water; on the 34th to 43rd day, turn off the hydrogen-rich circulating water device, and on the 34th to 36th day, add 90-110 kilograms of sea salt and 90-110g of Sanhuang to every 6 cubic meters of water; on the 37th to 39th day, add 90-110 kilograms of sea salt and 5-15mL of Shuizuan to every 6 cubic meters of water; on the 40th to 42nd day, add 90-110 kilograms of sea salt and 5-15mL of Yuerhuan to every 6 cubic meters of water; on the 43rd day, add 90-110 kilograms of sea salt and 150-250g compound multidimensional to every 6 cubic meters of water.

2. The method according to claim 1, characterized in that Step (1) Add 100 catties of sea salt, 250 g of multivitamin complex, and 250 g of Vc stress relief to every 6 cubic meters of water.

3. The method according to claim 1, characterized in that In step (2), 400-600 kg of broodstock are placed in every 6 cubic meters of water, and the average weight of the broodstock is 2.5 kg.

4. The method according to claim 1, characterized in that Step (2) On the 1st to 3rd days, add 15 mL of Junmeijing to every 6 cubic meters of water; on the 4th to 6th days, add 100 catties of sea salt and 100 g of Sanhuang to every 6 cubic meters of water; on the 7th to 9th days, add 100 catties of sea salt and 10 mL of Shuizuan to every 6 cubic meters of water; on the 10th to 12th days, add 100 catties of sea salt and 10 mL of Yuerhuan to every 6 cubic meters of water.

5. The method according to claim 1, characterized in that In step (3), on the 13th day, add 100 catties of sea salt and 200 g of multivitamin complex to every 6 cubic meters of water.

6. The method according to claim 1, characterized in that In step (4), 15 mL of Junmeijing is added to every 6 cubic meters of water on the 14th to 16th days; 200 g of compound multivitamin is added to every 6 cubic meters of water on the 17th to 18th days; 100 catties of sea salt and 100 g of Sanhuang are added to every 6 cubic meters of water on the 19th to 21st days; 100 catties of sea salt and 10 mL of Shuizuan are added to every 6 cubic meters of water on the 22nd to 24th days; 100 catties of sea salt and 10 mL of Yuerhuan are added to every 6 cubic meters of water on the 25th to 27th days; 100 catties of sea salt and 200 g of Yuerhuan are added to every 6 cubic meters of water on the 28th day. Compound multivitamin; on the 29th to 31st day, add Junmeijing to every 6 cubic meters of water; on the 32nd to 33rd day, add 200g compound multivitamin to every 6 cubic meters of water; on the 34th to 36th day, add 100 jin of sea salt and 100g of Sanhuang to every 6 cubic meters of water; on the 37th to 39th day, add 100 jin of sea salt and 10mL of Shuizuan to every 6 cubic meters of water; on the 40th to 42nd day, add 100 jin of sea salt and 10mL of Yuerhuan to every 6 cubic meters of water; on the 43rd day, add 100 jin of sea salt and 200g compound multivitamin to every 6 cubic meters of water.

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