CN110810290A - Propagation technology of crayfishes - Google Patents
Propagation technology of crayfishes Download PDFInfo
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- CN110810290A CN110810290A CN201810910478.6A CN201810910478A CN110810290A CN 110810290 A CN110810290 A CN 110810290A CN 201810910478 A CN201810910478 A CN 201810910478A CN 110810290 A CN110810290 A CN 110810290A
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Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; 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
- 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
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- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Marine Sciences & Fisheries (AREA)
- Animal Husbandry (AREA)
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- Food Science & Technology (AREA)
- Biodiversity & Conservation Biology (AREA)
- Farming Of Fish And Shellfish (AREA)
Abstract
The invention relates to a crayfish breeding technology, belonging to the technical field of agricultural breeding; establishing culture and hatching ponds, establishing a movable platform between the two ponds, and planting green grass on the movable platform; establishing a slope step and a unidirectional cave in the aquaculture pond; slope steps and two corresponding caves are built in the hatching pond, and greenhouse installation facilities are respectively built on two sides of the pond. Applying manure to the pond about one week after cleaning and disinfection, and adopting a sprinkling mode, wherein 200 kilograms of manure is applied to each mu, and the manure is fully decomposed in sunny days; applying straw fertilizer at intervals of 6-8 months, adding the straw fertilizer in blocks, and uniformly filling a layer; applying manure once more at intervals of 3-6 months, and the same way as the first fertilization. The feeding pond and the hatching pond are optimized, the movable platform is additionally arranged, the ingredients of food materials are enriched in the feeding aspect, the nutrition taken by the lobsters is improved, the improvement of the quality of the lobsters is facilitated, the proportion of the lobsters is improved, and the uniformity of the specifications of the lobsters is improved.
Description
Technical Field
The invention relates to a crayfish breeding technology, and belongs to the technical field of agricultural breeding.
Background
Crayfish is very survivable, and is also a home garden in addition to asia, europe and africa, and thus is a world-grade food.
The crayfish can be bred all the year round, and the peak time is 5-9 months. The breeding of the crayfish is special, most of the breeding process is finished in the cave, so the oviferous crayfish is difficult to see in the ordinary production. The ovaries need to mature last 2-5 months after mating and are subjected to ovulation and fertilization. Fertilized eggs are purple brown and are adhered to setae of swimming limbs on the abdomen, and the abdomen of the egg-carrying shrimp is often close to the cavity for water accumulation so as to keep the eggs in a wet state. The egg carrying amount of the crayfishes is small, generally 100-700 crayfishes are in the average of 300 crayfishes. The incubation time of the eggs is 14-24 days. During the development period of the crayfish larva, no external nutrition supply is needed, and the newly hatched crayfish needs to stay in the abdomen of the parent crayfish for about 10 days to separate from the parent crayfish. If the conditions are not suitable, the product can survive for several weeks without eating or drinking in the cave. After the pond is irrigated, the young shrimps and the parent shrimps climb out of the cave and are naturally distributed in the pond, and sometimes the parent shrimps carry the larvae to enter a water body and then release the larvae. Although the egg-carrying amount of the crayfish is less, the survival rate of the hatching of the larval is high. The dispersed breeding habit of the crayfish limits the large-scale production of the crayfish and brings adverse effects to intensive production.
Disclosure of Invention
The invention aims to provide a crayfish breeding technology which is reasonable in design and simple to operate, aiming at the defects and shortcomings of the prior art.
In order to achieve the purpose, the invention adopts the technical scheme that: the propagation technology of the crayfish comprises the following steps:
firstly, pond site selection and structure transformation:
1. fresh water culture is adopted, and sites are selected at places with good ventilation environment;
2. establishing culture and hatching ponds, establishing a movable platform between the two ponds, and planting green grass on the movable platform;
3. establishing a slope step and a unidirectional cave in the aquaculture pond; slope steps and two corresponding caves are built in the hatching pond, and greenhouse installation facilities are respectively built on two sides of the pond.
II, disinfection treatment: cleaning redundant metal fragments in the pool by a metal detection device, spraying quicklime slurry with heat in the whole pool, and using 120 kilograms of quicklime for each mu;
thirdly, fertilizing: applying manure to the pond about one week after cleaning and disinfection, and adopting a sprinkling mode, wherein 200 kilograms of manure is applied to each mu, and the manure is fully decomposed in sunny days; applying straw fertilizer at intervals of 6-8 months, adding the straw fertilizer in blocks, and uniformly filling a layer; applying manure once more at intervals of 3-6 months, and the same way as the first fertilization.
Fourthly, planting aquatic weeds: planting water plants about 3 months after fertilization, planting hydrilla verticillata and water peanuts in the center of the pond, planting elodea nutans and bitter herbs around the pond, planting part of potamogeton crispus, watercress and goldfish algae in a deep water area, planting 1/4 duckweed on the surface layer of the deep water area, planting a layer of water peanuts in a shallow water area, and planting water bamboo and arrowhead on a movable platform.
Fifthly, setting the greenhouse: the big-arch shelter is automatic flexible big-arch shelter, can carry out manual operation control according to the needs of temperature, humidity, and the inboard of big-arch shelter is equipped with the vertical net layer of one deck in addition, and the height of net layer is about 2 meters.
Sixthly, auxiliary equipment: an aerator and a temperature and humidity monitoring device are arranged in the pond;
seventhly, putting parent shrimps: 7. in late ten days of 8 months, selecting parent shrimps with bright red hard shells, strong physique, 25-40kg of body weight, full abdominal muscles and good gonad development, putting 60-100 kg of parent shrimps per mu with a male-female ratio of (3-4) to 1, and using 15g/m of parent shrimps before putting3Soaking in potassium permanganate solution for 5-10 min;
eighthly, feeding: feed for young shrimps: the crude protein content is 37.4%, and the mixture ratio of various raw materials is as follows: peru fish meal 20%, fermented blood meal 13%, bean cake 22%, cottonseed cake 15%, wheat middling 11%, corn flour 9.6%, bone meal 3%, yeast powder 2%, multivitamin premix 1.3%, ecdysone 0.1% and starch 3%;
adult shrimp feed: the crude protein content is 30.1 percent, and the mixture ratio is as follows: 5% of Peruvian fish meal, 10% of fermented blood meal, 30% of bean cake, 10% of cottonseed cake, 25% of wheat middling, 10% of corn flour, 5% of bone meal, 2% of yeast powder, 1.3% of multivitamin premix, 0.1% of ecdysone and 1.6% of starch;
in addition, the first and second substrates are,
the main component of the additional feed A is leftovers of dead fish, pigs, cattle, chickens, ducks, fish intestines and the like with strong fishy smell;
the main components of the additional feed B are rapeseed cakes, cotton seed cakes, peanut cakes, bran and bran;
the main components of the additional feed C are soybean, pumpkin, rice bran, wheat bran, bean dregs and sweet potato:
ninthly, inducing lobster activities: the lobsters are induced to move on the culture area and the movable platform through feeding, and are allowed to eat grass before and after eating.
Tenthly, induced propagation:
1. in the middle 9 months, the water in the culture pond is periodically precipitated until the steps in the pond are exposed, the water plants floating in the pond are cleaned in due time, the amount of the additional feed C can be properly added in the period,
2. adopting an artificial induction method to induce the mating and spawning of the breeding shrimps,
3. after the female shrimps lay eggs for 10-12 hours, lowering the water level to 30-40CM, carefully moving the egg-carrying female shrimps with water into an incubation pool, and carrying out centralized incubation;
4. after the larvae hatch out of membranes, artificially cultured chlamydomonas or rotifer is put into the pond, and pond water rich in plankton can be added into the hatching pond for feeding the larvae of the crayfish and the larvae of the crayfish;
5. after the young shrimps leave the parent body, the seed shrimps are brought to the steps and caught in a driving mode, and the young shrimps are caught in batches by stages;
6. the artificial propagation of crayfish can generally propagate for two rounds in each propagation season; the cement pond can produce 5000 plus 10000 tails per square meter of juvenile shrimps, and the soil pond excavated by manpower can produce 500 plus 1000 tails per square meter of juvenile shrimps;
eleven, overwintering management: the temperature of the pond is adjusted in an auxiliary mode through the greenhouse, the living state of the lobsters is checked regularly, and ice blocks are cleared in time.
Twelfth, seedling cultivation: moving the seedlings to a movable platform every morning and feeding the seedlings with the powdered additional feed B and guiding the seedlings to feed growing water plants; the additive feed A is fed in the afternoon, and the feed for the young shrimps is fed in the evening.
Preferably, in the first step, the culture and hatching ponds are both provided with a deep water area and a shallow water area, the depth of the deep water area is controlled to be 0.6-1 m, and the shallow water area is only required to be provided with a layer of water on the surface.
Preferably, the manure in the third step is mainly prepared from chicken manure or pig manure.
Preferably, the greenhouse in the fifth step is a right-angle greenhouse, namely, the two sides of the greenhouse are straight surfaces, the top of the greenhouse is a plane, the greenhouse films on the two sides can move up and down, and the greenhouse film on the top of the greenhouse film can move back and forth.
Preferably, the shrimp feed is put in the initial feeding stage of the feed in the step eight, and the additional feeds A and B are used; later using adult shrimp feed, and using additional feed B and C; the main feed is put in the morning and at night every day, and the additional feed is put in twice before and after noon.
Preferably, the ninth step is carried out by cleaning the aquatic weeds in the pond (not all the aquatic weeds are cleaned, but the aquatic weeds are cleaned and removed) by the mowing equipment.
Preferably, in the step ten, the lobsters are classified after precipitation every time, and can be classified into three types after being watered for several times at intervals of a fish net, the classification basis is the physique of the lobsters, and during subsequent mating, the lobsters can be mated in sequence according to the classification, so that the uneven rate is avoided.
The invention has the beneficial effects that: according to the breeding technology for the crayfish, the feeding pond and the hatching pond are optimized, the movable platform is additionally arranged, in the aspect of feeding, the ingredients of food are enriched, the nutrition taken by the crayfish is improved, the quality of the crayfish is improved, the proportion of the crayfish fries is improved, the uniformity of the crayfish fries is improved, the fry breeding amount and the economic benefit of the crayfish fries in unit area can be improved, and the method can be systematically operated and is convenient to popularize and apply.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Figure 1 is a schematic of the pond construction of the present invention;
description of reference numerals:
1- -a culture pond; 2- -hatching pool; 3- -a movable platform; 11- -the step of the culture pond; 21- -step of hatching tank.
Detailed Description
The invention will be further described with reference to the accompanying drawings.
Referring to fig. 1, the propagation technique of crayfish in this embodiment is as follows:
pool site selection and structure transformation: 1. fresh water culture is adopted, and sites are selected at places with good ventilation environment; 2. establishing culture and hatching ponds, establishing a circular movable platform between the two ponds, and planting green grass on the movable platform; 3. establishing a slope step and a unidirectional cave in the aquaculture pond; slope steps and two corresponding caves are built in the hatching pond, and greenhouse installation facilities are respectively built on two sides of the pond.
And (3) disinfection treatment: cleaning redundant metal fragments in the pool by a metal detection device, spraying quicklime slurry with heat in the whole pool, and using 120 kilograms of quicklime for each mu;
fertilizing: applying manure to the pond about one week after cleaning and disinfection, and adopting a sprinkling mode, wherein 200 kilograms of manure is applied to each mu, and the manure is fully decomposed in sunny days; applying straw fertilizer at intervals of 6-8 months, adding the straw fertilizer in blocks, and uniformly filling a layer; applying manure once more at intervals of 3-6 months, and the same way as the first fertilization.
Planting aquatic weeds: planting water plants about 3 months after fertilization, planting hydrilla verticillata and water peanuts in the center of the pond, planting elodea nutans and bitter herbs around the pond, planting part of potamogeton crispus, watercress and goldfish algae in a deep water area, planting 1/4 duckweed on the surface layer of the deep water area, planting a layer of water peanuts in a shallow water area, and planting water bamboo and arrowhead on a movable platform.
The greenhouse is arranged: the big-arch shelter is automatic flexible big-arch shelter, can carry out manual operation control according to the needs of temperature, humidity, and the inboard of big-arch shelter is equipped with the vertical net layer of one deck in addition, and the height of net layer is about 2 meters.
Auxiliary equipment: an aerator and a temperature and humidity monitoring device are arranged in the pond;
putting parent shrimps: 7. in late ten days of 8 months, selecting parent shrimps with bright red hard shells, strong physique, 25-40kg of body weight, full abdominal muscles and good gonad development, putting 60-100 kg of parent shrimps per mu with a male-female ratio of (3-4) to 1, and using 15g/m of parent shrimps before putting3Soaking in potassium permanganate solution for 5-10 min;
and (3) feed putting: feed for young shrimps: the crude protein content is 37.4%, and the mixture ratio of various raw materials is as follows: peru fish meal 20%, fermented blood meal 13%, bean cake 22%, cottonseed cake 15%, wheat middling 11%, corn flour 9.6%, bone meal 3%, yeast powder 2%, multivitamin premix 1.3%, ecdysone 0.1% and starch 3%;
adult shrimp feed: the crude protein content is 30.1 percent, and the mixture ratio is as follows: 5% of Peruvian fish meal, 10% of fermented blood meal, 30% of bean cake, 10% of cottonseed cake, 25% of wheat middling, 10% of corn flour, 5% of bone meal, 2% of yeast powder, 1.3% of multivitamin premix, 0.1% of ecdysone and 1.6% of starch;
in addition, the main components of the additional feed A are leftovers of dead fish, pigs, cattle, chickens, ducks, fish intestines and the like with strong fishy smell;
the main components of the additional feed B are rapeseed cakes, cotton seed cakes, peanut cakes, bran and bran;
the main components of the additional feed C are soybean, pumpkin, rice bran, wheat bran, bean dregs and sweet potato:
inducing lobster activity: the lobsters are induced to move on the culture area and the movable platform through feeding, and are allowed to eat grass before and after eating.
And (3) induced propagation: 1. in the middle ten days of 9 months, periodically lowering the water in the culture pond until the steps in the pond are exposed, timely cleaning the water plants floating in the pond, properly adding the amount of the additional feed C during the period, 2, inducing the breeding shrimps to mate and lay eggs by adopting an artificial induction method, 3, after the female shrimps lay eggs for 10-12 hours, lowering the water level to 30-40CM, carefully moving the egg-carrying female shrimps into the incubation pond with water, and carrying out centralized incubation; 4. after the larvae hatch out of membranes, artificially cultured chlamydomonas or rotifer is put into the pond, and pond water rich in plankton can be added into the hatching pond for feeding the larvae of the crayfish and the larvae of the crayfish; 5. after the young shrimps leave the parent body, the seed shrimps are brought to the steps and caught in a driving mode, and the young shrimps are caught in batches by stages; 6. the artificial propagation of crayfish can generally propagate for two rounds in each propagation season; the cement pond can produce 5000 plus 10000 tails per square meter of juvenile shrimps, and the soil pond excavated by manpower can produce 500 plus 1000 tails per square meter of juvenile shrimps;
overwintering management: the temperature of the pond is adjusted in an auxiliary mode through the greenhouse, the living state of the lobsters is checked regularly, and ice blocks are cleared in time.
And (3) seedling cultivation: moving the seedlings to a movable platform every morning and feeding the seedlings with the powdered additional feed B and guiding the seedlings to feed growing water plants; the additive feed A is fed in the afternoon, and the feed for the young shrimps is fed in the evening.
Wherein, deep water areas and shallow water areas are arranged in the culture and hatching ponds in the pond site selection and the structure improvement, the depth of the deep water areas is controlled to be 0.6-1 m, and the shallow water areas are only provided with a layer of water on the surface. The main component of the manure in the fertilization is chicken manure or pig manure. The greenhouse is a right-angle greenhouse in the greenhouse setting, namely, two sides of the greenhouse are straight surfaces, the top of the greenhouse is a plane, greenhouse films on the two sides can move up and down, and the greenhouse film on the top of the greenhouse film moves back and forth. Feeding the shrimp feed in the initial feeding stage of the feed in the feed feeding, and using additional feeds A and B; later using adult shrimp feed, and using additional feed B and C; the main feed is put in the morning and at night every day, and the additional feed is put in twice before and after noon. When the lobster activity inducing device is operated, the water plants in the pond can be properly cleaned through the mowing device (not all the water plants are cleaned, but the water plants are cleaned and removed in a surplus mode).
In addition, in the process of waiting to breed, the lobsters are classified after precipitation every time, and can be classified into three types after being watered for a plurality of times at intervals of the fish net, the classification basis is the physique of the lobsters, and the lobsters can be mated in sequence according to classification during subsequent mating, so that the uneven rate is avoided.
According to the propagation technology of the crayfish, the feeding pond and the hatching pond are optimized, the movable platform is additionally arranged, in the aspect of feeding, the ingredients of food materials are enriched, the nutrition taken by the crayfish is improved, the quality of the crayfish is improved, the proportion of the crayfish fries is improved, the uniformity of the crayfish fries is improved, the fry breeding amount and the economic benefit of the crayfish fries in unit area can be improved, and the method can be systematically operated and is convenient to popularize and apply.
The above description is only for the purpose of illustrating the technical solutions of the present invention and not for the purpose of limiting the same, and other modifications or equivalent substitutions made by those skilled in the art to the technical solutions of the present invention should be covered within the scope of the claims of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (7)
1. A crayfish propagation technology is characterized in that: the crayfish breeding technology comprises the following steps:
firstly, pond site selection and structure transformation:
(1) fresh water culture is adopted, and sites are selected at places with good ventilation environment;
(2) establishing culture and hatching ponds, establishing a movable platform between the two ponds, and planting green grass on the movable platform;
(3) establishing a slope step and a unidirectional cave in the aquaculture pond; establishing gradient steps and two corresponding caves in the hatching pond, and respectively establishing greenhouse installation facilities on two sides of the pond;
(II) disinfection treatment: cleaning redundant metal fragments in the pool by a metal detection device, spraying quicklime slurry with heat in the whole pool, and using 120 kilograms of quicklime for each mu;
(III) fertilizing: applying manure to the pond about one week after cleaning and disinfection, and adopting a sprinkling mode, wherein 200 kilograms of manure is applied to each mu, and the manure is fully decomposed in sunny days; applying straw fertilizer at intervals of 6-8 months, adding the straw fertilizer in blocks, and uniformly filling a layer; applying manure once more at intervals of 3-6 months, and the same way as the first fertilization;
(IV) planting aquatic weeds: planting waterweeds in about 3 months after fertilization, planting hydrilla verticillata and alternanthera philoxeroides in the center of the pond, planting elodea and bitter grass around the pond, planting part of potamogeton crispus, watercress and hornworts in a deep water area, planting 1/4 duckweed on the surface layer of the deep water area, planting a layer of alternanthera philoxeroides in a shallow water area, and planting water bamboo and arrowhead on a movable platform;
(V) setting the greenhouse: the greenhouse is an automatic telescopic greenhouse, can be manually operated and controlled according to the requirements of temperature and humidity, and is provided with a vertical grid layer at the inner side, wherein the height of the grid layer is about 2 meters;
(VI) auxiliary equipment: an aerator and a temperature and humidity monitoring device are arranged in the pond;
(VII) putting parent shrimps: 7. in late ten days of 8 months, selecting parent shrimps with bright red hard shells, strong physique, 25-40kg of body weight, full abdominal muscles and good gonad development, putting 60-100 kg of parent shrimps per mu with a male-female ratio of (3-4) to 1, and using 15g/m of parent shrimps before putting3Soaking in potassium permanganate solution for 5-10 min;
(eighth), feed putting: feed for young shrimps: the crude protein content is 37.4%, and the mixture ratio of various raw materials is as follows: peru fish meal 20%, fermented blood meal 13%, bean cake 22%, cottonseed cake 15%, wheat middling 11%, corn flour 9.6%, bone meal 3%, yeast powder 2%, multivitamin premix 1.3%, ecdysone 0.1% and starch 3%;
adult shrimp feed: the crude protein content is 30.1 percent, and the mixture ratio is as follows: 5% of Peruvian fish meal, 10% of fermented blood meal, 30% of bean cake, 10% of cottonseed cake, 25% of wheat middling, 10% of corn flour, 5% of bone meal, 2% of yeast powder, 1.3% of multivitamin premix, 0.1% of ecdysone and 1.6% of starch;
in addition, the first and second substrates are,
the main component of the additional feed A is leftovers of dead fish, pigs, cattle, chickens, ducks, fish intestines and the like with strong fishy smell;
the main components of the additional feed B are rapeseed cakes, cotton seed cakes, peanut cakes, bran and bran;
the main components of the additional feed C are soybean, pumpkin, rice bran, wheat bran, bean dregs and sweet potato:
(nine) inducing lobster activities: the lobsters are induced to move on the culture area and the movable platform through feeding, and are allowed to eat grass before and after eating.
(ten) inducing and breeding:
(1) and 9, in the middle ten days of the month, periodically reducing the water in the culture pond until the steps in the pond are exposed, and timely cleaning the float aquatic weeds in the pond, wherein the using amount of the additional feed C can be properly added in the period;
(2) inducing the mating and spawning of the breeding shrimps by adopting an artificial induction method;
(3) after the female shrimps lay eggs for 10-12 hours, lowering the water level to 30-40CM, carefully moving the egg-carrying female shrimps with water into an incubation pool, and carrying out centralized incubation;
(4) after the larvae hatch out of membranes, artificially cultured chlamydomonas or rotifer is put into the pond, and pond water rich in plankton can be added into the hatching pond for feeding the larvae of the crayfish and the larvae of the crayfish;
(5) after the young shrimps leave the parent body, the seed shrimps are brought to the steps and caught in a driving mode, and the young shrimps are caught in batches in stages;
(6) the artificial propagation of the crayfish can generally propagate for two rounds in each propagation season; the cement pond can produce 5000 plus 10000 tails per square meter of juvenile shrimps, and the soil pond excavated by manpower can produce 500 plus 1000 tails per square meter of juvenile shrimps;
eleventh, overwintering management: the temperature of the pond is adjusted in an auxiliary mode through the greenhouse, the living state of the lobsters is checked regularly, and ice blocks are cleared in time.
(twelfth) seedling cultivation: moving the seedlings to a movable platform every morning and feeding the seedlings with the powdered additional feed B and guiding the seedlings to feed growing water plants; the additive feed A is fed in the afternoon, and the feed for the young shrimps is fed in the evening.
2. A crayfish breeding technique as claimed in claim 1, wherein: preferably, in the first step, the culture and hatching ponds are both provided with a deep water area and a shallow water area, the depth of the deep water area is controlled to be 0.6-1 m, and the shallow water area is only required to be provided with a layer of water on the surface.
3. A crayfish breeding technique as claimed in claim 1, wherein: the main component of the manure in the third step is chicken manure or pig manure.
4. A crayfish breeding technique as claimed in claim 1, wherein: and fifthly, the greenhouse is a right-angle greenhouse, namely, the two sides of the greenhouse are straight surfaces, the top of the greenhouse is a plane, the greenhouse films on the two sides can move up and down, and the greenhouse film on the top of the greenhouse film can move back and forth.
5. A crayfish breeding technique as claimed in claim 1, wherein: feeding the shrimp feed in the initial feeding stage of the feed in the step eight, and using additional feeds A and B; later using adult shrimp feed, and using additional feed B and C; the main feed is put in the morning and at night every day, and the additional feed is put in twice before and after noon.
6. A crayfish breeding technique as claimed in claim 1, wherein: when the step nine is operated, the aquatic weeds in the pond can be properly cleaned through the mowing equipment.
7. A crayfish breeding technique as claimed in claim 1, wherein: in the step ten, the lobsters are classified after precipitation every time, and can be classified into three types after being watered for a plurality of times at intervals of the fish net, the classification basis is the physique of the lobsters, and during subsequent mating, the lobsters can be mated in sequence according to classification, so that the uneven rate is avoided.
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