CN111657187A - Method for artificially breeding fancy carps - Google Patents

Abstract

The invention discloses a method for artificially breeding koi, belonging to the technical field of aquaculture and comprising the following steps: building an infrastructure: mainly comprises a cement pond of a breeding pond and a cultivating pond, and a water circulation treatment system and a soil pond which are composed of a pipe drawing bin, a sedimentation bin, a physical bin, a biochemical bin and a clear water sterilization bin; artificial propagation: selecting, cultivating, oviposition, fertilization and hatching parent fishes in sequence; fish breeding and identification: identifying and retaining fancy carps with good body types, bright color, uniform patterns and elegant swimming postures; adult fish cultivation and overwintering: shifting to a cement pond for overwintering when the winter period is from the bottom of 10 months to the middle of 4 months of the next year, and stopping feeding the feed when the water temperature is lower than 16 ℃; transferring the fries into a soil pond for cultivation after overwintering; disease control: comprises sterilizing a cement pond and an earth pond; and (4) catching and transporting. By using the culture method provided by the invention, the cultured fancy carp adult fish is selected from thyme, the characteristics of the original parent fish are continued, the ornamental effect is high, the ornamental value is high, and the economic benefit is good.

Description

Method for artificially breeding fancy carps

Technical Field

The invention relates to an artificial breeding method of koi, which is mainly suitable for breeding koi in China central China and east China, and belongs to the technical field of aquaculture.

Background

The fancy carp is a high-grade ornamental fish, has extremely high ornamental value and is deeply loved by people; originally, the method refers in particular to a plurality of carps with beautiful colors; because they are often expensive, and the added names indicate that the Chinese characters are rich and abundant, the Chinese characters are popular with people who are rich and expensive from ancient times; this is in turn a more expensive and lucrative meaning for animals that are mostly reared by affluents.

Koi belongs to the order cyprinid, cyprinid and cyprinid, and is known as "underwater precious stone" or "swimming artwork" because of its physical and mental body, gorgeous color, gorgeous stripe, natural or natural swimming posture and gentle and smooth habit.

The fancy carp is a large-scale rare ornamental fish which is prepared by artificially breeding and directionally cultivating a carp mutant strain, the body color and the patterns are changeable, and the contrast of the body color and the color spots is also important embodiment of the ornamental value.

Improper method for breeding the fancy carps can lead the fancy carps to have dark color and luster, slow action and even easy infection, thus seriously affecting the appreciation of people; the screening of the koi fry is a long-term arduous work, and the consequences of the degradation of the koi offspring, the fading of the genetic characteristics and the like are caused due to the non-strict screening.

Disclosure of Invention

The invention aims to solve the problems that the improper method for breeding the fancy carps can lead the fancy carps to have dark color and luster, slow action and even easy disease infection, and seriously influence the appreciation of people; the screening of the koi fry is a long-term arduous work, and the consequences of the degradation of the koi offspring, the fading of the genetic characteristics and the like are caused due to the non-strict screening. The like, provides a method for artificially breeding koi;

the purpose of the invention is achieved by adopting the following technical scheme:

a method for artificially breeding koi comprises the following steps:

s1, building an infrastructure:

an infrastructure for artificially breeding the fancy carps mainly comprises a cement pond suitable for manual intervention operation, a water circulation treatment system for purifying a breeding environment and a soil pond for long-term growth of the fancy carps after the fancy carps grow up, wherein a plurality of oxygen increasing machines are connected with the infrastructure and are used for increasing the content of dissolved oxygen in water;

the cement pond comprises a breeding pond and a cultivating pond, the cement pond is built in a place with sunny ventilation, sufficient water flow and convenient irrigation and drainage, and the periphery of the cement pond is hard and watertight; the area of the breeding pond is 8 square meters to 15 square meters, the pond depth is 1.8 to 2m, a net fence with the height of 40 to 60cm is arranged on the periphery, four corners of the bottom of the breeding pond are arc-shaped, the opening of the breeding pond is approximately square, a glass or plastic greenhouse is erected on the breeding pond, and a sunshade net is covered on the breeding pond; the area of the cultivation pool is 15-60 square meters, the pool depth is 2-2.25m, the water depth is 1.2-1.8m, four corners of the bottom of the cultivation pool are smeared into an arc shape by mixing cement with sand, the mouth part of the top of the cultivation pool is approximately square, a warm shed is laid on the top of the cultivation pool, a heating system is arranged in the warm shed, and a sunshade net is covered above the warm shed;

the water circulation treatment system consists of a pipe drawing bin, a precipitation bin, a physical bin, a biochemical bin and a clear water sterilization bin, and is composed of five bins, wherein the bottoms of other bins of the five bins are respectively connected with the pipe drawing bin, and the bottom of the cement pond and the bottoms of the bins are respectively provided with a sewage discharge pipeline communicated with a sewage discharge pond; a circulating water pump is arranged between the clear water sterilization bin and the cultivation pool, and the water in the cultivation pool is completely circulated once within 2-3 hours by the circulating water pump;

the soil pond is a square meter with the area of 1334 to 2668 square meters and the depth of 1.2 to 2.2 meters, including the depth of 1.5 meters;

s2, artificial propagation:

the process sequentially comprises the steps of parent fish selection, parent fish cultivation, spawning fertilization and incubation;

the parent fish is selected, female fish with the age of more than 4 and the total length of more than 75cm and male fish with the age of more than 2 and the total length of more than 55cm are selected as the parent fish, and the parent fish is beautiful in body, strong in physique, pure in strain and bright in color;

the parent fish is cultivated, the water temperature is suitable for 22-28 ℃, the pH value is 6.5-8, the dissolved oxygen is 5-7mg/L, the protein content of the fed feed is 36-39%, the daily feeding amount is 2% of the weight of the parent fish, and the parent fish is fed for 4-5 times a day;

the oviposition fertilization comprises natural propagation and artificial insemination; the artificial insemination is carried out in 5-7 months, the water temperature is 19-27 ℃, the proper water temperature is 22-24 ℃, parent fishes of the same strain are selected and placed into a breeding net cage in a breeding pond according to the male-female ratio of 1: 2-1: 3, and the breeding net cage is provided with a fish nest; before spawning of female fish, fishing out and wiping off fish bodies, lightly pressing the belly, extruding the eggs into a dry basin, taking out male fish without dripping water, wiping off the fish bodies, lightly pressing the belly to enable semen to flow into the extruded eggs, uniformly stirring with feathers to enable the eggs to be fully fertilized, and then uniformly scattering fertilized eggs on fish nests in water;

after the fertilized eggs absorb water, the fertilized eggs are transferred to another breeding pond for hatching, the quality of hatching water meets the relevant standard, the water temperature is 22-24 ℃, the pH value is 6.5-8, the dissolved oxygen is 5mg/L or more, the fry is hatched after 72 hours, the fry starts to flatly swim for foraging after 48 hours, egg yolk water or brocade carp fry opening feed is fed, and the fries are transferred to an earth pond for fry cultivation after stable ingestion;

s3, fish species cultivation and identification:

the fry density is 4 ten thousand per 667 square meters to 5 ten thousand per 667 square meters, and the pond with water depth of 0.7m to 1.2m is thrown into; feeding soybean milk or open feed when the fish fry length in the first 20 days is not more than 3cm, feeding compound feed with different grain sizes according to the fish fry size after the fish fry length reaches more than 3cm, wherein the daily feeding amount is 2.5 percent of the weight of the fish, and feeding for 4-5 times daily;

according to the basic characteristics of the fancy carp strain, the fancy carp with good body type, gorgeous color quality, uniform pattern and elegant swimming posture is identified and selected;

s4, adult fish cultivation and overwintering:

shifting to a cement pond for overwintering from the bottom of 10 months to the middle ten days of the next 4 months, stocking 10-15 tails of 1-year-old koi in a water body for carrying out thin film planting in 1m, stocking 3-5 tails of 2-year-old koi in a water body for carrying out thin film planting in 1m, controlling the water temperature to be 20-24 ℃ by using a heating system, controlling the dissolved oxygen to be more than 5mg/L and the water depth to be 1.5m, feeding the feed with the protein content of more than 38 percent, feeding the fish with the daily feeding amount of 3-5 percent of the weight of the fish for 4-5 times daily;

the koi over 2 years old can also pass winter in the pond, the water depth is kept more than 1.5m, and when the water temperature is lower than 16 ℃, the feeding is stopped;

transferring the fish fries into a soil pond for cultivation after overwintering, stocking 20-120 fries per 667 square meter water surface, placing the fish fries in water with the depth of 1.2-1.8m, the dissolved oxygen content of more than 5mg/L, feeding the fish fries with the feed protein content of more than 38%, feeding the fish fries with the daily feeding amount of 2-3% of the weight of the fish, and feeding the fish fries for 4-5 times daily;

s5, disease control:

disinfecting a soil pond 7 to 10 days before stocking, draining water in the pond, and splashing 75 to 100kg of quick lime per 667 square meter or 4 to 5kg of bleaching powder with a chlorine content of more than 30 percent on the square meter per 667 square meter; carrying out 20g/m ethanol-water separation on the cement pond and the fish fishing device, and soaking for 10-20 min for disinfection;

200g of lightyellow sophora root, 125g of amur corktree bark, 125g of dutchmanspipe root, 60g of chrysanthemum and 60g of honeysuckle are prepared into a decoction, and the decoction is sprayed in a whole pool to prevent and treat the red skin disease;

s6, catching and transporting:

stopping feeding the feed for 2 days before the fishing, reducing the water level to 1m, pulling the nylon net by using a machine, fishing, and transferring into a cement pond;

the transportation adopts a mode of oxygenating plastic bags and boxing to transport the fancy carps.

In any of the above aspects, preferably, in step S1: the area of the breeding pond is 10 square meters, and the water depth is 1.25-1.5 m; the area of the cultivation pool is 30 square meters, 40 square meters and 50 square meters, and the water depth is 1.5 m;

the breeding pond and the cultivation pond, the sunshade net covered by the breeding pond and the cultivation pond are both: a hand-operated control furling type sunshade net or a motor winding type semi-automatic sunshade net; in step S2, the natural propagation specifically includes: selecting parent fishes of the same strain, and putting the parent fishes into a breeding pond with fish nests according to the male-female ratio of 1: 2-1: 3 to enable the parent fishes to naturally lay eggs and fertilize; the fish nest is made by bundling materials such as palm sheets, net sheets and the like into small bundles, or hatching grass sterilized by potassium permanganate is uniformly hung at a position 20cm below the water surface;

in the step S6, the mode of oxygenating and boxing the fancy carp by the plastic bag is specifically that 3 layers of plastic bags with the size of 1200mm multiplied by 500mm and the thickness of 0.07mm are used for shipment, the volume ratio of water contained is 1/3-1/4, the volume ratio of oxygenation is 2/3-3/4, and the plastic bags are transported in boxes one by one for 24 hours.

The application range of the breeding method is breeding of the fancy carps in China Central China and east China, and the fancy carps applied by the breeding method comprise the following varieties: red and white, big positive trichromatic, showa and trichromatic.

Furthermore, the identification and selection requirements of the fancy carp breed 'red and white': white background is pure white, red is thick and elegant, red spots are uniform in color, margins are clear, stripes on the whole body are uniformly distributed, and the left side and the right side are symmetrical; erythema on the head, which is not reflected to eyes, jaws, cheeks, and white incisions between the head and the trunk; no erythema on the abdomen, and erythema on the tail part;

the first identification is carried out 28-31 days after the red and white koi carp fries are hatched and the length is 4.5-5 cm, and the identification is carried out once every month, generally 4-5 times.

Furthermore, the fancy carp breed has the identification and selection requirements of 'big positive three colors': red and black stripes are arranged on the white bottom, the head only has red spots without black spots, and the pectoral fins are provided with black stripes; white background is pure white, and red color is thick and elegant; the stripes on the trunk are uniformly distributed, and the fins have no red stripes; especially, the upper product is the one with white tail and symmetrical stripe of the trunk;

the first identification is carried out 28-31 days after the large positive three-color fancy carp fry is hatched and the body length is 4.5-5 cm, and the identification is carried out once every month later, and generally 4-5 times.

Furthermore, the identification and selection requirements of the fancy carp breed 'showa three colors': the head has large dark red spots, the red is uniform, the edge is clear, and particularly, the head and the tail have white spots or the head has face cuts as the top product; the ink lines on the trunk are in a flash type or a triangular shape, are thick and are rolled to the abdomen; round black spots exist on the pectoral fins, and the pectoral fins are not completely white, not completely black and have no erythema;

carrying out first identification and selection in the larval open-ended adventure 3d, selecting larval fish with black spots, eliminating the larval fish with white or orange yellow, and placing the larval fish into a soil pond for cultivation after the first identification and selection; carrying out secondary identification and selection when the whole body grows to 4.5-5 cm after 30d of incubation; the selection is carried out once a month, and generally 4 to 5 times.

In any of the above-described aspects it is preferred that,

the spawning and fertilization in step S2 further includes induced spawning of the parent fish, and the induced spawning of the parent fish is specifically performed by: the method comprises the steps of sequentially adding carp Pituitary Gland (PG), Human Chorionic Gonadotropin (HCG) and luteinizing hormone releasing hormone (LHRH-A2) into physiological saline to ensure that the concentrations of the carp Pituitary Gland (PG), the Human Chorionic Gonadotropin (HCG) and the luteinizing hormone releasing hormone (LHRH-A2) in the physiological saline are respectively 3mg/mLPG, 500IU/mLHCG and 35 mu g/mLLHRH-A2, injecting 0.5-1mL of oxytocic according to the development degree of female fish, wherein the oxytocic effect time is 11-20h, and the male fish does not need to be injected.

More particularly in any of the above aspects, the identifying comprises:

and (3) second identification: selecting and reserving individuals with strong physique, lively swimming, straight spine, no deformity or defect of each fin and obvious variety characteristics, and eliminating other individuals or culturing and selling the individuals additionally;

and (3) third identification: selecting the ones with beautiful shape, symmetrical pectoral fin and head shape, no deformation of eyes, kisses and palps, bright and dense color, clear pattern stripes and obvious variety characteristics;

fourth identification and selection: selecting the fish fins with proper proportion, bright color, pure white bottom, no stain, clear red spot edge, uniform black spot and left-right balance of stripes on the whole body.

The invention has the beneficial technical effects that:

according to the method for artificially breeding the koi, the method for artificially breeding the koi solves the problems in the prior art, provides a certain technology and method, and has the following effects and positive significance in various aspects:

(1) the characteristics of the fancy carp strain are retained to a large extent, and the fancy carp subjected to multiple screening inherits the pure gene of the fancy carp parent fish;

(2) by using the culture method provided by the invention, the cultivated fancy carp adult fish has one thyme and even one thyme, continues the characteristics of the original parent fish, is classic and elegant, has high ornamental value and can generate better economic benefit.

Drawings

FIG. 1 is a schematic diagram of the steps of an embodiment of the method for artificially breeding koi according to the present invention.

Detailed Description

In order to make the technical solutions of the present invention more clear and definite for those skilled in the art, the present invention is further described in detail below with reference to the examples and the accompanying drawings, but the embodiments of the present invention are not limited thereto.

The first embodiment is as follows:

referring to fig. 1, the method for artificially breeding koi according to the present embodiment includes the following steps:

s1, building an infrastructure:

an infrastructure for artificially breeding the fancy carps mainly comprises a cement pond suitable for manual intervention operation, a water circulation treatment system for purifying a breeding environment and a soil pond for long-term growth of the fancy carps after the fancy carps grow up, wherein a plurality of oxygen increasing machines are connected with the infrastructure and are used for increasing the content of dissolved oxygen in water;

the cement pond comprises a breeding pond and a cultivating pond, and is constructed in places with sunny ventilation, sufficient water flow and convenient irrigation and drainage, and the periphery of the cement pond is hard and watertight; a breeding pond, the area of which is 8 square meters to 15 square meters, the depth of the pond is 1.8 to 2 meters, a net fence with the height of 40 to 60cm is arranged on the periphery of the breeding pond, four corners of the bottom of the breeding pond are arc-shaped, the opening of the breeding pond is approximately square, a glass or plastic greenhouse is erected on the breeding pond, and a sunshade net is covered on the breeding pond; the cultivation pool has the area of 15-60 square meters, the pool depth of 2-2.25m and the water depth of 1.2-1.8m, four corners of the bottom of the cultivation pool are sanded into an arc shape by cement, the mouth of the top of the cultivation pool is approximately square, a warm shed is laid on the top of the cultivation pool, a heating system is arranged in the warm shed, and a sunshade net is covered above the warm shed;

the water circulation treatment system consists of a pipe drawing bin, a precipitation bin, a physical bin, a biochemical bin and a clear water sterilization bin, wherein the bottoms of other bins of the five bins are respectively connected with the pipe drawing bin, and the bottom of the cement pond and the bottoms of the bins are respectively provided with a sewage discharge pipeline communicated with a sewage discharge pond; a circulating water pump is arranged between the clear water sterilization bin and the cultivation pool, and the pool water of the cultivation pool is completely circulated once within 2-3 hours by the circulating water pump;

the soil pond has the area of 1334 square meters to 2668 square meters and the depth of 1.2 to 2.2 meters, including the depth of 1.5 meters;

s2, artificial propagation:

the process sequentially comprises the steps of parent fish selection, parent fish cultivation, spawning fertilization and incubation;

selecting parent fish, wherein the parent fish is female fish with the age of more than 4 and the total length of more than 75cm and male fish with the age of more than 2 and the total length of more than 55cm, and the parent fish is beautiful in body, strong in body, pure in strain and bright in color;

breeding parent fish, wherein the suitable water temperature is 22-28 ℃, the pH value is 6.5-8, the dissolved oxygen is 5-7mg/L, the protein content of the fed feed is 36-39%, the daily feeding amount is 2% of the weight of the parent fish, and the parent fish is fed for 4-5 times daily;

oviposition fertilization including natural reproduction and artificial insemination; artificial insemination is carried out for 5 months to 7 months, water temperature is 19 ℃ to 27 ℃, proper water temperature is 22 ℃ to 24 ℃, parent fishes of the same strain are selected and put into a breeding net cage in a breeding pond according to the male-female ratio of 1: 2 to 1: 3, and the breeding net cage is provided with a fish nest; before spawning of female fish, fishing out and wiping off fish bodies, lightly pressing the belly, extruding the eggs into a dry basin, taking out male fish without dripping water, wiping off the fish bodies, lightly pressing the belly to enable semen to flow into the extruded eggs, uniformly stirring with feathers to enable the eggs to be fully fertilized, and then uniformly scattering fertilized eggs on fish nests in water;

hatching, after absorbing water, the fertilized eggs are transferred to another breeding pond for hatching, the quality of hatching water meets the relevant standard, the water temperature is 22-24 ℃, the pH value is 6.5-8, the dissolved oxygen is 5mg/L or more, fish fries are hatched after 72 hours, after the fish fries begin to flatly swim for feeding after 48 hours, egg yolk water or brocade carp fry opening feed is fed, and after the feeding is stable, the fish fries are transferred to an earth pond for fish fry cultivation;

s3, fish species cultivation and identification:

the fry density is 4 ten thousand per 667 square meters to 5 ten thousand per 667 square meters, and the pond with water depth of 0.7m to 1.2m is thrown into; feeding soybean milk or open feed when the fish fry length in the first 20 days is not more than 3cm, feeding compound feed with different grain sizes according to the fish fry size after the fish fry length reaches more than 3cm, wherein the daily feeding amount is 2.5 percent of the weight of the fish, and feeding for 4-5 times daily;

identifying and selecting the fancy carps with good body types, gorgeous color quality, uniform patterns and elegant swimming postures according to the basic characteristics of the fancy carp strains;

s4, adult fish cultivation and overwintering:

shifting to a cement pond for overwintering from the bottom of 10 months to the middle ten days of the next 4 months, stocking 10-15 tails of 1-year-old koi in a water body for carrying out thin film planting in 1m, stocking 3-5 tails of 2-year-old koi in a water body for carrying out thin film planting in 1m, controlling the water temperature to be 20-24 ℃ by using a heating system, controlling the dissolved oxygen to be more than 5mg/L and the water depth to be 1.5m, feeding the feed with the protein content of more than 38 percent, feeding the fish with the daily feeding amount of 3-5 percent of the weight of the fish for 4-5 times daily; allowing the fancy carp of more than 2 years old to pass winter in the soil pond, controlling the water depth to be more than 1.5m, and stopping feeding the feed when the water temperature is lower than 16 ℃;

transferring the fish fries into a soil pond for cultivation after overwintering, stocking 20-120 fries per 667 square meter water surface, placing the fish fries in water with the depth of 1.2-1.8m, the dissolved oxygen content of more than 5mg/L, feeding the fish fries with the feed protein content of more than 38%, feeding the fish fries with the daily feeding amount of 2-3% of the weight of the fish, and feeding the fish fries for 4-5 times daily;

s5, disease control:

disinfecting a soil pond 7 to 10 days before stocking, draining water in the pond, and splashing 75 to 100kg of quick lime per 667 square meter or 4 to 5kg of bleaching powder with a chlorine content of more than 30 percent on the square meter per 667 square meter; carrying out 20g/m ethanol-water separation on the cement pond and the fish fishing device, and soaking for 10-20 min for disinfection;

200g of lightyellow sophora root, 125g of amur corktree bark, 125g of dutchmanspipe root, 60g of chrysanthemum and 60g of honeysuckle are prepared into a decoction, and the decoction is sprayed in a whole pool to prevent and treat the red skin disease;

s6, catching and transporting:

stopping feeding the feed for 2 days before catching, reducing the water level to 1m, pulling the nylon net by using a machine, catching, and transferring into a cement pond;

the transportation adopts a mode of oxygenating plastic bags and boxing to transport the fancy carps.

Example two:

referring to fig. 1, in the present embodiment, in a method for breeding an artificial koi, in step S1: the breeding pond has the area of 10 square meters and the water depth of 1.25 to 1.5 meters; the cultivation pool area is 30 square meters, 40 square meters and 50 square meters, and the water depth is 1.5 m;

breed pond and cultivation pond, the sunshade net that both covered is: a hand-operated control furling type sunshade net or a motor winding type semi-automatic sunshade net.

Referring to fig. 1, in the artificial koi breeding method provided in this embodiment, in step S2, the natural breeding specifically includes: selecting parent fishes of the same strain, and putting the parent fishes into a breeding pond with fish nests according to the male-female ratio of 1: 2-1: 3 to enable the parent fishes to naturally lay eggs and fertilize; the fish nest is made by bundling materials such as palm sheets, net sheets and the like into small bundles, or hatching grass sterilized by potassium permanganate is uniformly hung at a position 20cm below the water surface;

in the step S6, the method for oxygenating and boxing the fancy carp by using the plastic bag is specifically that 3 layers of plastic bags with the size of 1200mm multiplied by 500mm and the thickness of 0.07mm are used for shipment, the volume ratio of water contained is 1/3-1/4, the volume ratio of oxygenation is 2/3-3/4, and the plastic bags are bagged and boxed for transportation and transportation for 24 hours.

Example three:

in the artificial koi breeding method provided by the embodiment, the koi varieties applied by the breeding method include: red and white, big positive trichromatic, showa and trichromatic.

Referring to fig. 1, in the artificial koi breeding method provided in this embodiment, the koi variety "red and white" identification and selection requirements are as follows: white background is pure white, red is thick and elegant, red spots are uniform in color, margins are clear, stripes on the whole body are uniformly distributed, and the left side and the right side are symmetrical; erythema on the head, which is not reflected to eyes, jaws, cheeks, and white incisions between the head and the trunk; no erythema on the abdomen, and erythema on the tail part;

the first identification is carried out 28-31 days after the red and white koi carp fries are hatched and the length is 4.5-5 cm, and the identification is carried out once every month, generally 4-5 times.

Referring to fig. 1, in the artificial koi breeding method provided in this embodiment, the koi variety "big positive three colors" has the identification and selection requirements: red and black stripes are arranged on the white bottom, the head only has red spots without black spots, and the pectoral fins are provided with black stripes; white background is pure white, and red color is thick and elegant; the stripes on the trunk are uniformly distributed, and the fins have no red stripes; especially, the upper product is the one with white tail and symmetrical stripe of the trunk;

the first identification is carried out 28-31 days after the large positive three-color fancy carp fry is hatched and the body length is 4.5-5 cm, and the identification is carried out once every month later, and generally 4-5 times.

Referring to fig. 1, in the artificial koi breeding method provided in this embodiment, the koi variety "showa three-color" identification and selection requirements: the head has large dark red spots, the red is uniform, the edge is clear, and particularly, the head and the tail have white spots or the head has face cuts as the top product; the ink lines on the trunk are in a flash type or a triangular shape, are thick and are rolled to the abdomen; round black spots exist on the pectoral fins, and the pectoral fins are not completely white, not completely black and have no erythema;

carrying out first identification and selection in the larval open-ended adventure 3d, selecting larval fish with black spots, eliminating the larval fish with white or orange yellow, and placing the larval fish into a soil pond for cultivation after the first identification and selection; carrying out secondary identification and selection when the whole body grows to 4.5-5 cm after 30d of incubation; the selection is carried out once a month, and generally 4 to 5 times.

Example four:

referring to fig. 1, the artificial koi breeding method provided in this embodiment is similar to the first embodiment in principle, except that, in this embodiment,

spawning and fertilization in the step S2 further comprises induced spawning of the parent fish, wherein the induced spawning of the parent fish is performed by the following specific operations: the parent fish adopts an artificial one-time intraperitoneal injection method for artificial oxytocic for induced spawning, the formula of the oxytocic is that carp Pituitary Gland (PG), Human Chorionic Gonadotropin (HCG) and luteinizing hormone releasing hormone (LHRH-A2) are sequentially added into physiological saline, the concentrations of the carp pituitary gland, the Human Chorionic Gonadotropin (HCG) and the luteinizing hormone releasing hormone (LHRH-A2) in the physiological saline are respectively 3mg/mLPG, 500IU/mLHCG and 35 mu g/mLLHRH-A2, 0.5-1mL of the oxytocic is injected according to the development degree of the parent fish, the induced spawning effect time is 11-20h, and the male parent fish does not need to be injected.

Example five:

referring to fig. 1, similar to the embodiment, in the present embodiment, the identification and selection specific description of the artificial koi breeding method provided by the present embodiment is as follows:

the identification and selection requirements of the fancy carp breed of red and white are as follows: white background is pure white, red is thick and elegant, red spots are uniform in color, margins are clear, stripes on the whole body are uniformly distributed, and the left side and the right side are symmetrical; erythema on the head, which is not reflected to eyes, jaws, cheeks, and white incisions between the head and the trunk; no erythema on the abdomen, and erythema on the tail part;

the first identification is carried out 28-31 days after the red and white koi carp fries are hatched and the length is 4.5-5 cm, and the identification is carried out once every month, generally 4-5 times.

Selecting individuals with strong physique, lively movement, straight spine, no deformity or defect of each fin and obvious variety characteristics for the second time, and eliminating other individuals or cultivating and selling the individuals additionally;

thirdly, selecting the one with beautiful shape of each fin, symmetrical pectoral fin and head shape, no deformation of eyes, kisses and palps, bright and dense color, clear pattern stripes and obvious variety characteristics;

selecting the fish fins with proper proportion, bright color, pure white bottom, no stain, clear red spot edge, uniform black spot and left-right balance of stripes on the whole body for the fourth time.

The fancy carp breed has the identification and selection requirements of 'big positive three colors': red and black stripes are arranged on the white bottom, the head only has red spots without black spots, and the pectoral fins are provided with black stripes; white background is pure white, and red color is thick and elegant; the stripes on the trunk are uniformly distributed, and the fins have no red stripes; especially, the upper product is the one with white tail and symmetrical stripe of the trunk;

carrying out first identification and selection 28-31 days after the large positive three-color fancy carp fry is hatched and when the body length is 4.5-5 cm, carrying out identification and selection once every month, and generally carrying out identification and selection for 4-5 times;

selecting individuals with strong physique, lively movement, straight spine, no deformity or defect of each fin and obvious variety characteristics for the second time, and eliminating other individuals or cultivating and selling the individuals additionally;

thirdly, selecting the one with beautiful shape of each fin, symmetrical pectoral fin and head shape, no deformation of eyes, kisses and palps, bright and dense color, clear pattern stripes and obvious variety characteristics;

selecting the fish fins with proper proportion, bright color, pure white bottom, no stain, clear red spot edge, uniform black spot and left-right balance of stripes on the whole body for the fourth time.

The 'Zhao and three-color' identifying and selecting requirement of the fancy carp breed: the head has large dark red spots, the red is uniform, the edge is clear, and particularly, the head and the tail have white spots or the head has face cuts as the top product; the ink lines on the trunk are in a flash type or a triangular shape, are thick and are rolled to the abdomen; round black spots exist on the pectoral fins, and the pectoral fins are not completely white, not completely black and have no erythema;

carrying out first identification and selection in the larval open-ended adventure 3d, selecting larval fish with black spots, eliminating the larval fish with white or orange yellow, and placing the larval fish into a soil pond for cultivation after the first identification and selection; carrying out secondary identification and selection when the whole body grows to 4.5-5 cm after 30d of incubation; selecting once every month, generally selecting 4-5 times;

selecting individuals with strong physique, lively movement, straight spine, no deformity or defect of each fin and obvious variety characteristics for the second time, and eliminating other individuals or cultivating and selling the individuals additionally;

thirdly, selecting the one with beautiful shape of each fin, symmetrical pectoral fin and head shape, no deformation of eyes, kisses and palps, bright and dense color, clear pattern stripes and obvious variety characteristics;

selecting the fish fins with proper proportion, bright color, pure white bottom, no stain, clear red spot edge, uniform black spot and left-right balance of stripes on the whole body for the fourth time.

In conclusion, in the above embodiments, according to the method for artificially breeding koi in the above embodiments, and the method for artificially breeding koi in the above embodiments, through multiple field examinations and verifications in a confidential state, the characteristics of the koi strain can be retained to a greater extent, and the multiple screened koi inherits the pure gene of the koi parent fish.

To assist the reader in understanding the present application, relevant information is provided as follows:

1 internal data

2 data title (abbreviation)

3 cultivation Environment

Selecting a place which is sheltered from wind and exposed to the sun, rich in vegetation and quiet and refreshing. Sufficient water source, good water quality and no pollution. The water inlet and the water outlet are convenient and separate. The water quality of a water source meets the requirement of GB11607, and the water for cultivation meets the requirement of NY 5051.

4 Pond construction

4.1 Cement pit

4.1.1 Breeding tank

The square meter has the area of 8 to 15 square meters, the water depth is preferably 1.5m, the square meter is approximate to square, the four corners are preferably arc-shaped, and a sunshade net is preferably covered on the top of the pool for building a glass or plastic greenhouse.

4.1.2 cultivation pool

The square meter is 15-60 square meters in area, the pool depth is 2m, the water depth is 1.5m, the square is close to, the four corners of the inner opening are smeared into an arc, the pool top needs to be heated to maintain the temperature, and a sunshade net is covered on the pool top.

4.1.3 Water circulation treatment System

Comprises a tube drawing bin, a precipitation bin, a physical bin, a biochemical bin and a sterilizing clean water bin, and is connected with a cement pond. The pool bottom and each bin bottom are provided with a sewage discharge pipeline to a sewage discharge pool. A circulating water pump is arranged between the sterilization bin and the cultivation pool, and the power of the water pump is preferably 2-3 h to circulate the water in the cement pool once.

4.2 Pond is cultivated in soil

The area is preferably 1334 square meters to 2668 square meters, and the depth of the pool is 1.5 m.

5 Artificial reproduction

5.1 parent Fish selection

The female fish is more than 4 years old and the total length is more than 75 cm; the male fish is more than 2 years old and the total length is more than 55 cm. The strain is pure, bright in color, beautiful in body shape and strong in physique.

5.2 parent Fish rearing

The proper water temperature is 22-28 ℃, the protein content of the fed feed is more than 38%, the daily feeding amount is about 2% of the weight of the fish, and the feed is fed for 4-5 times daily. The feed should meet the requirements of GB 13078.

5.3 oviposition fertilization

5.3.1 propagation conditions

The breeding season is 5-7 months, the water temperature is 19-27 ℃, and the optimum temperature is 22-24 ℃.

5.3.2 Natural reproduction

And selecting parent fishes of the same strain, and putting the parent fishes into a breeding pond with fish nests according to the male-female ratio of 1: 2-1: 3 to enable the parent fishes to naturally lay eggs and fertilize. Bundling palm sheets, net sheets and other materials into small bundles to prepare fish nests, or using finished hatching grass, sterilizing by potassium permanganate, and uniformly suspending the hatching grass below the water surface by 20 cm.

5.3.3 Artificial insemination

Selecting parent fishes of the same strain, and putting the parent fishes into a breeding pond with fish nests according to the male-female ratio of 1: 2-1: 3. Before spawning, fishing out female fish, wiping the fish body, pressing the belly lightly, extruding the eggs into a dry basin, and paying attention to not dropping water; then, the male fish is fished out, the fish body is wiped dry, the abdomen is lightly pressed, the seminal fluid flows into the squeezed eggs, the sperms are evenly stirred by the feathers to be fully fertilized, and then the fertilized eggs are evenly scattered on the fish nest in the water.

5.4 incubation

And after absorbing water, the fertilized eggs are transferred to another breeding pond for hatching, and the hatching water meets the requirement of NY 5051. The water temperature suitable for hatching is 22-24 ℃, air is filled for microflow, and the fry can be hatched for 72 hours. After the fry starts to flatly forage for about 48 hours, egg yolk water or fancy carp fry open feed is fed, and the fry can be transferred to a soil pond for fry cultivation after stable ingestion.

6 breeding of fish seeds

The fry is fertilized to be applied to an underwater pond, the density is 4 ten thousand per 667 square meters to 5 ten thousand per 667 square meters, and the water depth is 0.7m to 1.2 m. Feeding soybean milk or starter feed below 3cm (about the first 20 days), feeding compound feed with different grain diameters according to the size of fries after the length of the fries reaches above 3cm, wherein the daily feeding amount is about 2.5 percent of the weight of the fish, and the feed is fed for 4-5 times daily, and the used feed meets the requirements of GB 13078. When the water temperature reaches below 18 ℃ at the end of 10 months, the cement pond is transferred to enter a wintering period.

7 identifying and selecting

7.1 Standard requirements

The high-quality fancy carp needs to have good body type, high-quality color and luster, uniform patterns and beautiful swimming posture.

7.1.1 Reddish and white discrimination requirements

White background is pure white, and red is thick and elegant; the erythema needs to be uniform in color and clear in margin; the speckles must be uniformly distributed throughout the body, and are symmetrical from side to side; erythema must be observed on the head, but the erythema cannot be reflected to eyes, jaws and cheeks; white erythema between the head and trunk; erythema should also occur near the tail; the abdomen should not have erythema.

7.1.2 Dazheng three-color identification and selection requirement

Red and black stripes are on the white background, red spots but no black spots are on the head, and black stripes are on the pectoral fins. White background is pure white, and red is thick and elegant; the tail part is preferably white, the trunk is even, and the fins of the fish do not have red lines.

7.1.3 Zhao and three-color identification and selection requirements

The head should have large erythema, uniform redness, clear edge, and strong color. The head and tail with white spots have higher taste. The ink spots are preferably the ones with facial cuts on the head, and the ink lines on the trunk must be of a flash type or triangular shape, thick and bulky, and curled up to the abdomen. The pectoral fins should have round black spots, and should not be completely white, completely black or have erythema.

7.2 evaluation period

7.2.1 identification of Red, white and great Positive colors

The red and white and great positive three-color identification time interval is basically the same, and the first identification is about 30 days after the full length is 4.5 cm-5 cm. The medicine is selected once a month, and is generally selected from 4 times to 5 times.

7.2.2 identification of Zhao and three colors

And carrying out first identification in the larval open advection 3d, selecting larval fish with black spots (black larval selection), eliminating fish with white or orange yellow color, and putting the fish into a pond for cultivation after the first identification. The second time of identification is about 30 days of incubation when the total length is 4.5 cm-5 cm. The medicine is selected once a month, and is generally selected from 4 times to 5 times.

8 adult fish feeding management

After overwintering, the fries are transferred into a soil pond for fish culture (the specification is more than 40 cm), and 20-120 fries are stocked on the water surface every 667m 2. The water depth is 1.2 m-1.8 m. The dissolved oxygen is above 5 mg/L. The protein content of the feed is more than 38 percent, the daily feeding amount is about 2 percent of the weight of the fish, and the feed is fed for 4 to 5 times daily. The feed should meet the requirements of GB 13078.

9 management of overwintering

And during the wintering period from the bottom of 10 months to the middle ten days of the next 4 months, the carps are preferably transferred to a cement pond for cultivation, 10 to 15 koi seeds are released from a 1m water body for cultivation of 1-year koi, 3 to 5 koi seeds are released from a 1m water body for cultivation of 2-year koi seeds, the water temperature is preferably 22 to 24 ℃ (controlled by a heating system), and daily feed feeding is the same as adult fish cultivation. The koi of more than 2 years old can also pass winter in the pond, the water depth is more than 1.5m, and when the water temperature is lower than 16 ℃, the feeding is stopped.

10 disease control

Disinfecting the soil pond 7d to 10d before stocking, draining the pond water, and splashing 75kg/667 square meter to 100kg/667 square meter of quick lime or 4kg/667 square meter to 5kg/667 square meter of full pond of bleaching powder (chlorine content is more than 30%). And (3) carrying out 20g/m high-speed plantation on the cement pond and the instrument for disinfection, and soaking for 10-20 min. The principle of prevention is taken as the main principle and the prevention and treatment are combined, the disinfection and the disease prevention are frequently carried out, and the used medicines meet the requirements of NY 5071.

11 catching and transporting

11.1 catch

Stopping feeding the feed for 2d before catching, lowering the water level to 1m, pulling the nylon net by using a machine, catching, and transferring into a cement pond.

11.2 transport

11.2.1 oxygenation transport of Plastic bags

3 layers of plastic bags are used for shipment, the size of each plastic bag is 1200mm multiplied by 500mm (the thickness is 0.07 mm), the water content is 1/3-1/4, the oxygenation is 2/3-3/4, and the plastic bags are packed and transported one by one in a box and can be transported for 24 hours. The shipment quantity per bag is shown in table 1 according to the fish body specification.

TABLE 1 transportation volume of fancy carp per bag (water temperature 15-18 deg.C)

Specifications (centimeter)	Quantity (Tail)	Specifications (centimeter)	Quantity (Tail)
				＜20	40-50	40-50	2-3
20-30	25-30	50-60	1-2
				30-40	10-15	＞60	1

11.2.2 aerated transport of water tank

During transportation within 2h, water 2/3 is filled in containers such as plastic water tanks and canvas barrels, and an air pump is used for inflation or oxygenation transportation. According to the specification of fish bodies, the transportation quantity of the water body for 1m cultivation is shown in table 2.

TABLE 2 transportation volume of fancy carp per cubic water

Specifications (centimeter)	Quantity (Tail)	Specifications (centimeter)	Quantity (Tail)
				＜20	200-400	40-60	10-40
20-40	40-100	＞60	3-5

The application range of the culture method is mainly suitable for: the cultivation method of the invention is used for cultivating the fancy carps in China Central China and east China, the fancy carps cultivated by multiple times of elimination and identification are selected, thyme is selected from one to one even from ten thousand miles, the characteristics of the original parent fish are continued, the method is classic and elegant, the ornamental value is high, and simultaneously, the economic benefit can be generated, and the economic benefit can be produced at a reasonable level.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can substitute or change the technical solution of the present invention and its concept within the scope of the present invention disclosed by the present invention.

Claims (10)

1. The method for artificially breeding the koi is characterized by comprising the following steps of:

s1, building an infrastructure:

an infrastructure for artificially breeding the fancy carps mainly comprises a cement pond suitable for manual intervention operation, a water circulation treatment system for purifying a breeding environment and a soil pond for long-term growth of the fancy carps after the fancy carps grow up, wherein a plurality of oxygen increasing machines are connected with the infrastructure and are used for increasing the content of dissolved oxygen in water;

the cement pond comprises a breeding pond and a cultivating pond, the cement pond is built in a place with sunny ventilation, sufficient water flow and convenient irrigation and drainage, and the periphery of the cement pond is hard and watertight; the area of the breeding pond is 8 square meters to 15 square meters, the pond depth is 1.8 to 2m, a net fence with the height of 40 to 60cm is arranged on the periphery, four corners of the bottom of the breeding pond are arc-shaped, the opening of the breeding pond is approximately square, a glass or plastic greenhouse is erected on the breeding pond, and a sunshade net is covered on the breeding pond; the area of the cultivation pool is 15-60 square meters, the pool depth is 2-2.25m, the water depth is 1.2-1.8m, four corners of the bottom of the cultivation pool are smeared into an arc shape by mixing cement with sand, the mouth part of the top of the cultivation pool is approximately square, a warm shed is laid on the top of the cultivation pool, a heating system is arranged in the warm shed, and a sunshade net is covered above the warm shed;

the water circulation treatment system consists of a pipe drawing bin, a precipitation bin, a physical bin, a biochemical bin and a clear water sterilization bin, and is composed of five bins, wherein the bottoms of other bins of the five bins are respectively connected with the pipe drawing bin, and the bottom of the cement pond and the bottoms of the bins are respectively provided with a sewage discharge pipeline communicated with a sewage discharge pond; a circulating water pump is arranged between the clear water sterilization bin and the cultivation pool, and the water in the cultivation pool is completely circulated once within 2-3 hours by the circulating water pump;

the soil pond is a square meter with the area of 1334 to 2668 square meters and the depth of 1.2 to 2.2 meters, including the depth of 1.5 meters;

s2, artificial propagation:

the process sequentially comprises the steps of parent fish selection, parent fish cultivation, spawning fertilization and incubation;

the parent fish is selected, female fish with the age of more than 4 and the total length of more than 75cm and male fish with the age of more than 2 and the total length of more than 55cm are selected as the parent fish, and the parent fish is beautiful in body, strong in physique, pure in strain and bright in color;

the parent fish is cultivated, the water temperature is suitable for 22-28 ℃, the pH value is 6.5-8, the dissolved oxygen is 5-7mg/L, the protein content of the fed feed is 36-39%, the daily feeding amount is 2% of the weight of the parent fish, and the parent fish is fed for 4-5 times a day;

the oviposition fertilization comprises natural propagation and artificial insemination; the artificial insemination is carried out in 5-7 months, the water temperature is 19-27 ℃, the proper water temperature is 22-24 ℃, parent fishes of the same strain are selected and placed into a breeding net cage in a breeding pond according to the male-female ratio of 1: 2-1: 3, and the breeding net cage is provided with a fish nest; before spawning of female fish, fishing out and wiping off fish bodies, lightly pressing the belly, extruding the eggs into a dry basin, taking out male fish without dripping water, wiping off the fish bodies, lightly pressing the belly to enable semen to flow into the extruded eggs, uniformly stirring with feathers to enable the eggs to be fully fertilized, and then uniformly scattering fertilized eggs on fish nests in water;

after the fertilized eggs absorb water, the fertilized eggs are transferred to another breeding pond for hatching, the quality of hatching water meets the relevant standard, the water temperature is 22-24 ℃, the pH value is 6.5-8, the dissolved oxygen is 5mg/L or more, the fry is hatched after 72 hours, the fry starts to flatly swim for foraging after 48 hours, egg yolk water or brocade carp fry opening feed is fed, and the fries are transferred to an earth pond for fry cultivation after stable ingestion;

s3, fish species cultivation and identification:

the fry density is 4 ten thousand per 667 square meters to 5 ten thousand per 667 square meters, and the pond with water depth of 0.7m to 1.2m is thrown into; feeding soybean milk or open feed when the fish fry length in the first 20 days is not more than 3cm, feeding compound feed with different grain sizes according to the fish fry size after the fish fry length reaches more than 3cm, wherein the daily feeding amount is 2.5 percent of the weight of the fish, and feeding for 4-5 times daily;

according to the basic characteristics of the fancy carp strain, the fancy carp with good body type, gorgeous color quality, uniform pattern and elegant swimming posture is identified and selected;

s4, adult fish cultivation and overwintering:

shifting to a cement pond for overwintering from the bottom of 10 months to the middle ten days of the next 4 months, stocking 10-15 tails of 1-year-old koi in a water body for carrying out thin film planting in 1m, stocking 3-5 tails of 2-year-old koi in a water body for carrying out thin film planting in 1m, controlling the water temperature to be 20-24 ℃ by using a heating system, controlling the dissolved oxygen to be more than 5mg/L and the water depth to be 1.5m, feeding the feed with the protein content of more than 38 percent, feeding the fish with the daily feeding amount of 3-5 percent of the weight of the fish for 4-5 times daily;

allowing the fancy carp of more than 2 years old to pass winter in the soil pond, keeping the water depth to be more than 1.5m, and stopping feeding the feed when the water temperature is lower than 16 ℃;

transferring the fish fries into a soil pond for cultivation after overwintering, stocking 20-120 fries per 667 square meter water surface, placing the fish fries in water with the depth of 1.2-1.8m, the dissolved oxygen content of more than 5mg/L, feeding the fish fries with the feed protein content of more than 38%, feeding the fish fries with the daily feeding amount of 2-3% of the weight of the fish, and feeding the fish fries for 4-5 times daily;

s5, disease control:

disinfecting a soil pond 7 to 10 days before stocking, draining water in the pond, and splashing 75 to 100kg of quick lime per 667 square meter or 4 to 5kg of bleaching powder with a chlorine content of more than 30 percent on the square meter per 667 square meter; carrying out 20g/m ethanol-water separation on the cement pond and the fish fishing device, and soaking for 10-20 min for disinfection;

200g of lightyellow sophora root, 125g of amur corktree bark, 125g of dutchmanspipe root, 60g of chrysanthemum and 60g of honeysuckle are prepared into a decoction, and the decoction is sprayed in a whole pool to prevent and treat the red skin disease;

s6, catching and transporting:

stopping feeding the feed for 2 days before the fishing, reducing the water level to 1m, pulling the nylon net by using a machine, fishing, and transferring into a cement pond;

the transportation adopts a mode of oxygenating plastic bags and boxing to transport the fancy carps.

2. The artificial koi breeding method according to claim 1, wherein in step S1: the area of the breeding pond is 10 square meters, and the water depth is 1.25-1.5 m; the area of the cultivation pool is 30 square meters, 40 square meters and 50 square meters, and the water depth is 1.5 m;

the breeding pond and the cultivation pond, the sunshade net covered by the breeding pond and the cultivation pond are both: a hand-operated control furling type sunshade net or a motor winding type semi-automatic sunshade net.

3. The artificial koi breeding method according to claim 1, wherein in step S2, the natural reproduction specifically comprises: selecting parent fishes of the same strain, and putting the parent fishes into a breeding pond with fish nests according to the male-female ratio of 1: 2-1: 3 to enable the parent fishes to naturally lay eggs and fertilize; the fish nest is made by bundling materials such as palm sheets, net sheets and the like into small bundles, or hatching grass sterilized by potassium permanganate is uniformly hung at a position 20cm below the water surface;

in the step S6, the mode of oxygenating and boxing the fancy carp by the plastic bag is specifically that 3 layers of plastic bags with the size of 1200mm multiplied by 500mm and the thickness of 0.07mm are used for shipment, the volume ratio of water contained is 1/3-1/4, the volume ratio of oxygenation is 2/3-3/4, and the plastic bags are transported in boxes one by one for 24 hours.

4. The artificial koi breeding method according to claim 1, wherein the koi breeds applied by the breeding method comprise: red and white, big positive trichromatic, showa and trichromatic.

5. The method for cultivating artificial koi according to claim 4,

the identification and selection requirements of the fancy carp breed of red and white are as follows: white background is pure white, red is thick and elegant, red spots are uniform in color, margins are clear, stripes on the whole body are uniformly distributed, and the left side and the right side are symmetrical; erythema on the head, which is not reflected to eyes, jaws, cheeks, and white incisions between the head and the trunk; no erythema on the abdomen, and erythema on the tail part;

the first identification is carried out 28-31 days after the red and white koi carp fries are hatched and the length is 4.5-5 cm, and the identification is carried out once every month, generally 4-5 times.

6. The artificial Koi breeding method according to claim 4, wherein the Koi variety 'Dazheng three-color' identification and selection requirement is as follows: red and black stripes are arranged on the white bottom, the head only has red spots without black spots, and the pectoral fins are provided with black stripes; white background is pure white, and red color is thick and elegant; the stripes on the trunk are uniformly distributed, and the fins have no red stripes; especially, the upper product is the one with white tail and symmetrical stripe of the trunk;

the first identification is carried out 28-31 days after the large positive three-color fancy carp fry is hatched and the body length is 4.5-5 cm, and the identification is carried out once every month later, and generally 4-5 times.

7. The artificial Koi breeding method according to claim 4, wherein the Koi breed 'Showa three-color' identification and selection requirement is as follows: the head has large dark red spots, the red is uniform, the edge is clear, and particularly, the head and the tail have white spots or the head has face cuts as the top product; the ink lines on the trunk are in a flash type or a triangular shape, are thick and are rolled to the abdomen; round black spots exist on the pectoral fins, and the pectoral fins are not completely white, not completely black and have no erythema;

carrying out first identification and selection in the larval open-ended adventure 3d, selecting larval fish with black spots, eliminating the larval fish with white or orange yellow, and placing the larval fish into a soil pond for cultivation after the first identification and selection; carrying out secondary identification and selection when the whole body grows to 4.5-5 cm after 30d of incubation; the selection is carried out once a month, and generally 4 to 5 times.

8. The method for cultivating artificial koi according to claim 4,

the spawning and fertilization in step S2 further includes induced spawning of the parent fish, and the induced spawning of the parent fish is specifically performed by: the method comprises the steps of sequentially adding carp Pituitary Gland (PG), Human Chorionic Gonadotropin (HCG) and luteinizing hormone releasing hormone (LHRH-A2) into physiological saline to ensure that the concentrations of the carp Pituitary Gland (PG), the Human Chorionic Gonadotropin (HCG) and the luteinizing hormone releasing hormone (LHRH-A2) in the physiological saline are respectively 3mg/mLPG, 500IU/mLHCG and 35 mu g/mLLHRH-A2, injecting 0.5-1mL of oxytocic according to the development degree of female fish, wherein the oxytocic effect time is 11-20h, and the male fish does not need to be injected.

9. The artificial koi breeding method according to any one of claims 5, 6 and 7, wherein the identifying specifically comprises:

selecting individuals with strong physique, lively movement, straight spine, no deformity or defect of each fin and obvious variety characteristics for the second time, and eliminating other individuals or cultivating and selling the individuals additionally;

thirdly, selecting the one with beautiful shape of each fin, symmetrical pectoral fin and head shape, no deformation of eyes, kisses and palps, bright and dense color, clear pattern stripes and obvious variety characteristics;

selecting the fish fins with proper proportion, bright color, pure white bottom, no stain, clear red spot edge, uniform black spot and left-right balance of stripes on the whole body for the fourth time.

10. The artificial Koi breeding method according to claim 1, wherein the application range of the breeding method is Koi varieties in China Central China and east China.

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