CN113575479A - High-income crayfish breeding method - Google Patents

High-income crayfish breeding method Download PDF

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Publication number
CN113575479A
CN113575479A CN202110995600.6A CN202110995600A CN113575479A CN 113575479 A CN113575479 A CN 113575479A CN 202110995600 A CN202110995600 A CN 202110995600A CN 113575479 A CN113575479 A CN 113575479A
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crayfish
months
shrimp
pond
seedlings
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李淑云
陈效儒
张璐
王用黎
袁威
吴强强
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Tongwei Co Ltd
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Tongwei Co Ltd
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    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01K—ANIMAL HUSBANDRY; CARE OF BIRDS, FISHES, INSECTS; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
    • A01K61/00—Culture of aquatic animals
    • A01K61/50—Culture of aquatic animals of shellfish
    • A01K61/59—Culture of aquatic animals of shellfish of crustaceans, e.g. lobsters or shrimps
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23K—FODDER
    • A23K10/00—Animal feeding-stuffs
    • A23K10/20—Animal feeding-stuffs from material of animal origin
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23K—FODDER
    • A23K10/00—Animal feeding-stuffs
    • A23K10/20—Animal feeding-stuffs from material of animal origin
    • A23K10/22—Animal feeding-stuffs from material of animal origin from fish
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23K—FODDER
    • A23K10/00—Animal feeding-stuffs
    • A23K10/30—Animal feeding-stuffs from material of plant origin, e.g. roots, seeds or hay; from material of fungal origin, e.g. mushrooms
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23K—FODDER
    • A23K10/00—Animal feeding-stuffs
    • A23K10/30—Animal feeding-stuffs from material of plant origin, e.g. roots, seeds or hay; from material of fungal origin, e.g. mushrooms
    • A23K10/37—Animal feeding-stuffs from material of plant origin, e.g. roots, seeds or hay; from material of fungal origin, e.g. mushrooms from waste material
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23K—FODDER
    • A23K20/00—Accessory food factors for animal feeding-stuffs
    • A23K20/10—Organic substances
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23K—FODDER
    • A23K20/00—Accessory food factors for animal feeding-stuffs
    • A23K20/10—Organic substances
    • A23K20/105—Aliphatic or alicyclic compounds
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23K—FODDER
    • A23K20/00—Accessory food factors for animal feeding-stuffs
    • A23K20/10—Organic substances
    • A23K20/142—Amino acids; Derivatives thereof
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23K—FODDER
    • A23K20/00—Accessory food factors for animal feeding-stuffs
    • A23K20/10—Organic substances
    • A23K20/142—Amino acids; Derivatives thereof
    • A23K20/147—Polymeric derivatives, e.g. peptides or proteins
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23K—FODDER
    • A23K20/00—Accessory food factors for animal feeding-stuffs
    • A23K20/10—Organic substances
    • A23K20/158—Fatty acids; Fats; Products containing oils or fats
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23K—FODDER
    • A23K20/00—Accessory food factors for animal feeding-stuffs
    • A23K20/10—Organic substances
    • A23K20/174—Vitamins
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23K—FODDER
    • A23K20/00—Accessory food factors for animal feeding-stuffs
    • A23K20/20—Inorganic substances, e.g. oligoelements
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23K—FODDER
    • A23K20/00—Accessory food factors for animal feeding-stuffs
    • A23K20/20—Inorganic substances, e.g. oligoelements
    • A23K20/26—Compounds containing phosphorus
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23K—FODDER
    • A23K20/00—Accessory food factors for animal feeding-stuffs
    • A23K20/20—Inorganic substances, e.g. oligoelements
    • A23K20/28—Silicates, e.g. perlites, zeolites or bentonites
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23K—FODDER
    • A23K50/00—Feeding-stuffs specially adapted for particular animals
    • A23K50/80—Feeding-stuffs specially adapted for particular animals for aquatic animals, e.g. fish, crustaceans or molluscs
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/80—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in fisheries management
    • Y02A40/81—Aquaculture, e.g. of fish
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/80—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in fisheries management
    • Y02A40/81—Aquaculture, e.g. of fish
    • Y02A40/818—Alternative feeds for fish, e.g. in aquacultures
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
    • Y02P60/80—Food processing, e.g. use of renewable energies or variable speed drives in handling, conveying or stacking
    • Y02P60/87—Re-use of by-products of food processing for fodder production

Abstract

The invention discloses a high-income crayfish breeding method which comprises the following steps: s1, preparing a pond; s2, stocking the shrimp larvae; stocking the shrimp fries in two batches, wherein the first batch comprises the following steps: 2, putting the seedlings at the bottom of the month, wherein the specification of the seedlings is 100 plus 120 kg/kg, the number of the seedlings is 30-50 kg/mu, and the shrimps are collected in 3-4 months; and (3) second batch: in the middle ten days of 6 months, the seedling is put with the specification of 60-80 catties/catty, 80-120 catties/mu and the shrimps are collected in 7-12 months; s3, feeding management; feeding common crayfish compound feed in 2-4 months; feeding crayfish compound feed in high temperature period for 6-9 months; feeding common crayfish with the compound feed for 10-12 months. The crayfish breeding period is adjusted according to market demands, the large-size crayfish is bred in two breeding stages all the year round, and the whole-year breeding benefit of the crayfish can be effectively improved.

Description

High-income crayfish breeding method
Technical Field
The invention relates to the technical field of aquaculture, in particular to a high-income crayfish breeding method.
Background
Crayfish (Procambarus clarkii) is an aquatic animal of Crustacea, decapod and Cratadaceae, also called Procambarus clarkii, red crayfish and freshwater crayfish, is a freshwater economic animal, is popular with people because of delicious meat taste, and has become an important economic breeding variety in China in recent years.
At present, the general benefit of crayfish breeding is low, and the crayfish breeding in the next half year is mainly influenced by the high-temperature season in the next half year, so that the crayfish yield in the next half year is low, the specifications of the crayfish are small, the price of the crayfish is low, and the breeding benefit is low; therefore, the existing crayfish breeding is mainly concentrated in the first half year, large-sized crayfish can be easily bred, but the large-sized crayfish can be concentrated on the market in the first half year in a short time, and the whole price of the crayfish in the first half year is lowered due to the fact that a large amount of crayfish is on the market. Therefore, for farmers, even if the crayfish is high in yield, the overall culture benefit is low all the year round.
Disclosure of Invention
The invention aims to solve the problem of low annual benefit of crayfish breeding in the prior art, and provides a high-income crayfish breeding method.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a high-income crayfish breeding method comprises the following steps:
s1, preparing a pond;
s2, stocking the shrimp larvae; stocking the shrimp fries in two batches, wherein the first batch comprises the following steps: 2, putting the seedlings at the bottom of the month, wherein the specification of the seedlings is 100 plus 120 kg/kg, the number of the seedlings is 30-50 kg/mu, and the shrimps are collected in 3-4 months; and (3) second batch: in the middle ten days of 6 months, the seedling is put with the specification of 60-80 catties/catty, 80-120 catties/mu and the shrimps are collected in 7-12 months;
s3, feeding management; feeding common crayfish compound feed in 2-4 months; feeding crayfish compound feed in high temperature period for 6-9 months; feeding common crayfish with the compound feed for 10-12 months.
Preferably, in step S1, the pond includes a shallow water area and a deep water area, the shallow water area is a beach field arranged in the middle of the pond, and the deep water area is an annular shrimp culturing ditch arranged along the outer ring of the beach field.
Preferably, hydrilla verticillata is planted in shallow and deep water regions of the pond.
Preferably, the periphery of the shallow water area is provided with a barrier net.
Preferably, in step S2, before the first batch of young shrimps are released for breeding, sterilizing and killing the young shrimps in the pond 1-2 days in the middle of the month; and (4) disinfecting and killing the shrimp seedlings in the pond 5-6 days before the shrimp seedlings in the second batch are released.
Further preferably, in step S3, the crawfish compound feed for the high-temperature period comprises the following components by weight percent: 3-5% of fish meal, 5-8% of enzymolysis chicken powder, 4-6% of chicken powder, 3-8% of soybean protein concentrate, 16-24% of soybean meal, 6-10% of fermented soybean meal, 5-8% of corn protein powder, 12-14% of high gluten flour, 4-6% of fish pulp, 2-5% of fish oil, 0.5-1.0% of soybean lecithin, 0.2-1.0% of choline chloride, 0.5-1.0% of vitamin premix, 0.5-1.0% of mineral premix, 2-3% of monocalcium phosphate, 0.1-0.5% of L-lysine, 0.1-0.5% of L-methionine, 0.01-0.03% of (2-carboxyethyl) dimethyl sulfonium bromide, 0.02-0.04% of dehulled element, 8-20% of bentonite and 1-1.5% of sodium humate.
The crayfish is a breeding industry dominated by consumption, the consumption demand of the market on the crayfish is high in the whole period all the year round, especially the demand on large-size green shell formed shrimps is highest, the weight of the large-size formed shrimps is generally more than 50 g, the meat quality of the green shell shrimps is more delicious than that of the red shell shrimps, the shells of the shrimps are softer and thinner, and the shrimps are easy to cook and taste, so the market price of the large-size green shell shrimps is higher. The yield and the quality of the crayfish are mainly influenced by a breeding mode, in the current breeding mode, the crayfish is bred all the year round, the temperature in the first half year is proper, the breeding yield of the crayfish is high, the size of the formed crayfish is large, and the crayfish is mainly high-quality freshwater shrimp, but the market price is not high because the crayfish is concentrated and sold in the market in the first half year, the average price of the large crayfish is only about 20 yuan/jin in about 30 yuan/jin even in the most concentrated 5-6 months; and in the next half year, due to the influence of high-temperature seasons, the crayfish has low breeding yield and small specification of finished crayfish, mainly red-shell crayfish, and the price of the crayfish is low and is about 20 yuan/jin. The whole quality of the crayfishes in the next half year is poor, and the large-sized freshwater shrimps are very lack, so that the price of the large-sized freshwater shrimps is maintained at about 60 yuan/jin, but the farms do not have enough grown shrimps to meet the market.
Therefore, the breeding yield and quality of the crayfish cannot reasonably match the consumption demand of the market at present, and the overall benefit of the crayfish breeding industry is low. The invention explores a new mode for crayfish breeding, scientifically adjusts the breeding period of crayfish, and puts the crayfish fries into free-ranging in two batches, wherein the first batch is as follows: 2, putting the seedlings at the bottom of the month, wherein the specification of the seedlings is 100 plus 120 kg/kg, the number of the seedlings is 30-50 kg/mu, and the shrimps are collected in 3-4 months; and (3) second batch: and (4) putting the seedlings in the middle ten days of 6 months, wherein the specification of the put seedlings is 60-80 catties/catty, 80-120 catties/mu, and collecting shrimps in 7-12 months. Before stocking the first batch of shrimp seeds, sterilizing the pond and killing the shrimp seeds 1-2 ten days in the middle of the month; and (4) disinfecting and killing the shrimp seedlings in the pond 5-6 days before the shrimp seedlings in the second batch are released. The crayfish in 5-6 months is in a peak period of concentrated marketing, and due to large amount, the market price of large-size green shells and grown shrimps is low, the good shrimps are sold at a low level, and the breeding benefit is low. The invention adjusts the culture period, stops the culture in 5-6 months when the crayfishes are concentrated and come into the market, and disinfects and kills shrimp larvae to prepare for the subsequent culture.
The crayfish breeding method is characterized in that the crayfish is in a high-temperature season at the beginning of 7 months, the crayfish is low in yield and small in size and mostly red-shelled, and the crayfish breeding method is matched with the special crayfish compound feed in the high-temperature period to promote feeding of the crayfish, shell removal growth and reduction of the crayfish hole drilling reproductive performance in the high-temperature period; simultaneously, the water level of a deep water area of the pond is increased, the water temperature is reduced, and hydrilla verticillata is planted; the blocking net is arranged at the periphery of the shallow water area, and is matched with a good growth environment for the crayfish in a high-temperature period in many aspects, so that the pond can continuously grow a large amount of large-specification green-shell crayfish in the 7-12 months, the large-specification green-shell crayfish is always absent in the market in the 7-12 months, and the price of the large-specification green-shell crayfish is higher, therefore, the invention can effectively improve the breeding benefit of a breeding farm.
The invention has the following beneficial effects:
the invention combines the market demand, scientifically adjusts the breeding cycle of crayfishes, breeds two crayfishes in one year, the first batch: releasing the seedlings at the bottom of 2 months, and collecting the shrimps in 3-4 months; and (3) second batch: and (5) seedling is released in the middle ten days of the month 6, and shrimps are harvested in the month 7-12. The invention stops the cultivation in 5-6 months when the crayfishes are on the market intensively, and disinfects and kills shrimp seedlings in the pond in the time period, thus avoiding low price in the market and avoiding low sale of good shrimps; meanwhile, the crayfish breeding yield in 7-12 months is improved, the market demand is met when the supply of the crayfish market is not in line, the crayfish is sold at a high rate, and the crayfish breeding benefit is effectively improved.
Secondly), the special high-temperature-stage crayfish compound feed is fed during crayfish cultivation in 7-12 months, crayfish feeding can be effectively promoted in the high temperature stage, shelling growth is promoted, crayfish drilling reproductive performance is reduced, the size of the cultivated adult crayfish is large, more than 50 g/crayfish accounts for more than 70% of the total number of the crayfish, the adult crayfish is mainly freshwater shrimps, the quality of the adult crayfish is effectively improved, the crayfish is sold at a high price, and cultivation benefits are increased.
Detailed Description
The present invention will be further described with reference to the following examples.
Example 1
The following components were weighed: 4% of fish meal, 8% of enzymolysis chicken powder, 6% of chicken powder, 3% of soybean protein concentrate, 24% of soybean meal, 7% of fermented soybean meal, 8% of corn protein powder, 14% of high gluten flour, 6% of fish soluble paste, 5% of fish oil, 1.0% of soybean lecithin, 0.2% of choline chloride, 1.0% of vitamin premix, 1.0% of mineral premix, 2.0% of monocalcium phosphate, 0.5% of L-lysine, 0.1% of L-methionine, 0.03% of (2-carboxyethyl) dimethyl sulfonium bromide, 0.04% of dehulline, 8.13% of bentonite and 1% of sodium humate.
Pulverizing the above materials into powder with a pulverizer, sieving with 80 mesh sieve, and mixing in a feed mixer step by step; and (4) after uniformly mixing, granulating by using a feed particle bulking machine to obtain the crayfish compound feed in the high temperature period.
Example 2
5 percent of fish meal, 5 percent of enzymolysis chicken powder, 5 percent of chicken powder, 8 percent of soybean protein concentrate, 16 percent of soybean meal, 10 percent of fermented soybean meal, 7 percent of corn protein powder, 13 percent of high gluten flour, 5 percent of fish soluble paste, 4 percent of fish oil, 0.8 percent of soybean lecithin, 0.2 percent of choline chloride, 0.7 percent of vitamin premix, 0.8 percent of mineral premix, 2.5 percent of calcium dihydrogen phosphate, 0.5 percent of L-lysine, 0.1 percent of L-methionine, 0.02 percent of (2-carboxyethyl) dimethyl sulfonium bromide, 0.03 percent of hulling element, 14.85 percent of bentonite and 1.5 percent of sodium humate.
Pulverizing the above materials into powder with a pulverizer, sieving with 80 mesh sieve, and mixing in a feed mixer step by step; and (4) after uniformly mixing, granulating by using a feed particle bulking machine to obtain the crayfish compound feed in the high temperature period.
Example 3
4% of fish meal, 6% of enzymolysis chicken powder, 5% of chicken powder, 6% of soybean protein concentrate, 20% of soybean meal, 8% of fermented soybean meal, 6% of corn protein powder, 12% of high gluten flour, 4% of fish soluble paste, 2% of fish oil, 0.5% of soybean lecithin, 0.8% of choline chloride, 0.5% of vitamin premix, 0.6% of mineral premix, 3% of calcium dihydrogen phosphate, 0.1% of L-lysine, 0.1% of L-methionine, 0.03% of (2-carboxyethyl) dimethyl sulfonium bromide, 0.02% of dehulline, 20% of bentonite and 1.35% of sodium humate.
Pulverizing the above materials into powder with a pulverizer, sieving with 80 mesh sieve, and mixing in a feed mixer step by step; and (4) after uniformly mixing, granulating by using a feed particle bulking machine to obtain the crayfish compound feed in the high temperature period.
Example 4
Preparing a pond: the pond comprises a shallow water area and a deep water area, the shallow water area is a beach field arranged in the middle of the pond, the deep water area is an annular shrimp culture ditch arranged along the outer ring of the beach field, hydrilla verticillata is planted in the shallow water area and the deep water area of the pond, and a blocking net is arranged on the periphery of the shallow water area.
Stocking the shrimp larvae: sterilizing and killing shrimp fries in the middle ten days of 1-2 months, putting the fries at the bottom of 2 months, taking the shrimps in the fries with the size of 120 fries/jin, 30 jin/mu and 3-4 months, and feeding common crayfish compound feed during the culture period; sterilizing and killing shrimp fries in the middle ten days of 5-6 months, putting the fries in the middle ten days of 6 months, putting 60 fries/jin of fries, 120 jin/mu and collecting the shrimps in 7-12 months, feeding the crayfish compound feed prepared in the embodiment 1 in the high-temperature period in 6-9 months during the culture period, and feeding the common crayfish compound feed in 10-12 months.
Example 5
Preparing a pond: the pond comprises a shallow water area and a deep water area, the shallow water area is a beach field arranged in the middle of the pond, the deep water area is an annular shrimp culture ditch arranged along the outer ring of the beach field, hydrilla verticillata is planted in the shallow water area and the deep water area of the pond, and a blocking net is arranged on the periphery of the shallow water area.
Stocking the shrimp larvae: sterilizing and killing shrimp fries in the middle ten days of 1-2 months, putting the fries at the bottom of 2 months, putting 100 fries/jin of fries, 50 jin/mu, collecting shrimps in 3-4 months, and feeding common crayfish compound feed during the culture period; sterilizing and killing shrimp fries in the middle ten days of 5-6 months, putting the fries in the middle ten days of 6 months, putting the fries with the specification of 80 fries/jin, 80 jin/mu and collecting the shrimps in 7-12 months, feeding the crayfish compound feed prepared in the embodiment 1 in the high-temperature period in 6-9 months during the culture period, and feeding the common crayfish compound feed in 10-12 months.
Example 6
Preparing a pond: the pond comprises a shallow water area and a deep water area, the shallow water area is a beach field arranged in the middle of the pond, the deep water area is an annular shrimp culture ditch arranged along the outer ring of the beach field, hydrilla verticillata is planted in the shallow water area and the deep water area of the pond, and a blocking net is arranged on the periphery of the shallow water area.
Stocking the shrimp larvae: sterilizing and killing shrimp fries in the middle ten days of 1-2 months, putting the fries at the bottom of 2 months, putting the fries with the specification of 110 fries/jin, 40 jin/mu and collecting the shrimps in 3-4 months, and feeding common crayfish compound feed during the culture period; sterilizing and killing shrimp fries in the middle ten days of 5-6 months, putting the fries in the middle ten days of 6 months, wherein the specification of the put fries is 70 kg/kg, 100 kg/mu and collecting the shrimps in 7-12 months, feeding the crayfish compound feed prepared in the embodiment 1 in the high-temperature period in 6-9 months during the culture period, and feeding the common crayfish compound feed in 10-12 months.
Comparison test of crayfish breeding benefits
Test subjects: 6 ponds are selected, 3 ponds are randomly arranged and are respectively a control group a, a control group B and a control group C, and the other 3 ponds are respectively a test group A, a test group B and a test group C.
The test method comprises the following steps: the control groups a, b and c are all cultured according to the existing culture mode, seedling releasing culture is started in the current 2 months, the seedling releasing specification is 100 plus one day/another, 80-120 plus one day/mu, shrimp is harvested in 3-4 months, shrimp is harvested in 5-6 months, and shrimp is harvested continuously in 7-12 months.
Test group A, B, C was cultured according to the culture methods in example 4, example 5 and example 6, respectively.
And (3) test results: the control groups a, b and c receive three batches of shrimps in one year, receive the shrimps in 3-4 months, receive the shrimps in 5-6 months and continuously receive the shrimps in 7-12 months; test group A, B, C received two batches of shrimp a year, 3-4 months, and 7-12 months. The specific data are detailed in tables 1, 2, 3 and 4, wherein the table 1 is a 3-4 month culture income data statistical table; table 2 shows a statistical table of the culture income in 5-6 months; table 3 shows a 7-12 month cultivation income statistical table; table 4 is a total annual culture income statistical table. The sale price and the breeding cost of the crayfishes in the tables 1, 2 and 3 are all based on the actual market price mean value of the year 2019 and 2021 as reference standards.
TABLE 13-4 month cultivation income table
Categories Control group a Control group b Control group c Test group A Test group B Test group C
3-4 month yield (jin/mu) 92 75 84 78 71 93
3-4 month specification (g/only) 35 35 40 40 35 40
3-4 month's worth (Yuan/jin) 33 33 33 33 33 33
3-4 month yield (Yuan/mu) 3036 2475 2772 2574 2343 3069
3-4 months of cultivation cost (Yuan/mu) 412 330 368 556 542 586
3-4 months culture net profit (Yuan/mu) 2624 2145 2404 2018 1801 2483
TABLE 25-6 month culture income table
Categories Control group a Control group b Control group c Test group A Test group B Test group C
5-6 month yield (jin/mu) 125 140 132 0 0 0
Standard of 5-6 months (g/only) 40 35 35 0 0 0
5-6 month's worth (Yuan/jin) 19 19 19 0 0 0
Profit in 5-6 months (Yuan/mu) 2375 2660 2508 0 0 0
5-6 months of cultivation cost (Yuan/mu) 350 380 364 0 0 0
5-6 months culture net profit (Yuan/mu) 2025 2280 2144 0 0 0
TABLE 37-12 month cultivation income table
Categories Control group a Control group b Control group c Test group A Test group B Test group C
7-12 month yield (jin/mu) 30 22 28 135 130 150
7-12 month specification (g/only) 25 25 25 67 62 71
7-12 month's average price (Yuan/jin) 17 17 17 65 65 65
7-12 month yield (Yuan/mu) 510 374 476 8775 8450 9750
7-12 months of cultivation cost (Yuan/mu) 160 144 156 775 750 850
7-12 months culture net profit (Yuan/mu) 350 230 320 8000 7700 8900
TABLE 4 annual culture income statement
Categories Control group a Control group b Control group c Test group A Test group B Test group C
Total yield (Yuan/mu) 247 237 244 213 201 243
Total total income (Yuan/mu) 5921 5509 5756 11349 10793 12819
Total profit (Yuan/mu) 4999 4655 4868 10018 9501 11383
The data in tables 1, 2, 3 and 4 show that the control and test groups do not differ much in their benefit between months 3 and 4. The yield of the control group in the 5-6 months is close to that in the 3-4 months, and the large-size freshwater shrimps in the 5-6 months are on the market in a concentrated manner, so that the crayfish in the control group has high yield and good quality, and the overall yield in the 5-6 months is relatively general; and the test group does not breed crayfish in 5-6 months, and the test group has no income. But the profit of the test group and the control group is greatly different in the 7-12 months, and the profit of the test group is more than twice as much as that of the control group. The yield of the control group is small in 7-12 months, only small-sized red-shell crayfishes can be produced, the market price of the finished crayfishes is lower than 20 yuan/jin, and the income is low, so that large-sized green-shell crayfishes are seriously lacked in the market in 7-12 months under the current breeding method; the test group can continuously produce a large amount of large-size green-shell crayfishes under the culture method, the market price of the high-quality grown shrimps in the period is high, and the average price can reach 65 yuan/jin, so the income of 7-12 months is high.
From the annual culture results, although the test group does not produce crayfish in 5-6 months, the total yield of the crayfish is slightly lower than that of the control group, and the crayfish fries are purchased in 7-12 months, the total cost is slightly higher than that of the control group, the yield of the grown crayfish in 7-12 months of the test group is high, and the produced large-sized freshwater shrimps can be sold at a good price, so the total income and the total profit of the annual culture are more than twice of those of the control group, and the annual overall culture benefit is effectively improved.
In conclusion, the culture period is reasonably adjusted, the culture is stopped in 5-6 months when the crayfishes are intensively listed, the pond is disinfected and shrimp seedlings are killed in the time period, the market low price is avoided, and the good shrimps are prevented from being sold at low price; meanwhile, the crayfish breeding yield and the quality of the grown crayfish in 7-12 months are improved, the market demand is met when the supply of the crayfish in the market is not in line, the crayfish is sold at a high rate, and the crayfish breeding benefit is effectively improved.
The present description is to be considered as illustrative and not restrictive, and it is within the scope of the present invention that certain changes and modifications may be made in the details of the invention without departing from the spirit and scope of the invention.

Claims (6)

1. A high-income crayfish breeding method is characterized by comprising the following steps:
s1, preparing a pond;
s2, stocking the shrimp larvae; stocking the shrimp fries in two batches, wherein the first batch comprises the following steps: 2, putting the seedlings at the bottom of the month, wherein the specification of the seedlings is 100 plus 120 kg/kg, the number of the seedlings is 30-50 kg/mu, and the shrimps are collected in 3-4 months; and (3) second batch: in the middle ten days of 6 months, the seedling is put with the specification of 60-80 catties/catty, 80-120 catties/mu and the shrimps are collected in 7-12 months;
s3, feeding management; feeding common crayfish compound feed in 2-4 months; feeding crayfish compound feed in high temperature period for 6-9 months; feeding common crayfish with the compound feed for 10-12 months.
2. The crayfish farming method of claim 1, wherein the pond includes a shallow water area and a deep water area in step S1, the shallow water area is a beach field disposed in the middle of the pond, and the deep water area is an annular shrimp raceway disposed along the outer periphery of the beach field.
3. The crayfish farming method of claim 2 wherein hydrilla verticillata is planted in the shallow and deep water areas of the pond.
4. The crayfish farming method according to claim 2, wherein a barrier net is provided around the shallow water.
5. The crayfish farming method according to claim 1, wherein in step S2, the pond is disinfected and shrimp larvae killed 1 to 2 days before the first batch of shrimp larvae are released; and (4) disinfecting and killing the shrimp seedlings in the pond 5-6 days before the shrimp seedlings in the second batch are released.
6. The crayfish breeding method as claimed in claim 1, wherein in step S3, the compound feed for crayfish in the high temperature stage is composed of the following components in percentage by weight: 3-5% of fish meal, 5-8% of enzymolysis chicken powder, 4-6% of chicken powder, 3-8% of soybean protein concentrate, 16-24% of soybean meal, 6-10% of fermented soybean meal, 5-8% of corn protein powder, 12-14% of high gluten flour, 4-6% of fish pulp, 2-5% of fish oil, 0.5-1.0% of soybean lecithin, 0.2-1.0% of choline chloride, 0.5-1.0% of vitamin premix, 0.5-1.0% of mineral premix, 0.5-1.0% of monocalcium phosphate, 0.1-0.5% of L-lysine, 0.1-0.5% of L-methionine, 0.01-0.03% of (2-carboxyethyl) dimethyl sulfonium bromide, 0.02-0.04% of huller, 8-25% of bentonite and 2-5% of sodium humate.
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Application publication date: 20211102