CN109042401A - A kind of ecological cultivation method of river crab intercropping freshwater shrimp and channel catfish - Google Patents
A kind of ecological cultivation method of river crab intercropping freshwater shrimp and channel catfish Download PDFInfo
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Classifications
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- 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
- A01K61/10—Culture of aquatic animals of fish
-
- 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
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- 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
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Abstract
A kind of ecological cultivation method of river crab intercropping freshwater shrimp and channel catfish, comprises the following specific steps that: 1, pond prepares；2, it cleans up the pond disinfection；3, kind grass throws spiral shell；4, seed is put in a suitable place to breed；5, feedstuff feeding；6, water quality management；7, disease control；8, it catches.The present invention provides a kind of river crab, freshwater shrimp and channel catfish ecological polyculturing modes, and crab, shrimp, the fish mutual benefit in pond coexists.Channel catfish can swallow small fish and sick shrimp, can also clear up residual bait and the algae in pond, and fish body surface can secrete one or more of substances, and shrimp crab can be inhibited viral.Protein content is high in the excrement of river crab and channel catfish discharge, and easily aggregation pond bottom destroys water environment, pest and disease risk is caused to increase, freshwater shrimp can ingest the excrement of river crab and channel catfish, it purifies water, reduces the pollution that cultivation generates itself, keep good breeding environment, on the basis of not throwing or feeding material less, highly efficient and productive, ecological technical effect is realized.
Description
Technical field
The present invention relates to technical field of aquaculture, and in particular to a kind of ecology of river crab intercropping freshwater shrimp and channel catfish
Cultural method.
Background technique
Freshwater shrimp scientific name Macrobrachium nipponensis (Macrobrachium nipponense), it is commonly called as river prawn, grass shrimp, lake shrimp, belongs to crust
Guiding principle (Crustacea), pond crayfish category (Macrobrachium), it is distributed widely in China's freshwater., adaptation high with reproductive capacity
Property it is strong, full of nutrition, meat flavour is delicious, the advantages that can listing throughout the year, be it is deep by the favorite rare aquatic products of broad masses and I
The important freshwater aquiculture shrimps of state.The especially big specification freshwater shrimp of freshwater shrimp is in the situation that supply falls short of demand currently on the market, and market needs
Ask vigorous, and price is in higher level in freshwater product.
Channel catfish (Ietalurus punetaus) belong to Silurformes, Channel-catfish section fish, America is originated in, is whole world public affairs
The excellent variety for the suitable freshwater aquiculture recognized has the spies such as feeding habits are miscellaneous, growth is fast, wide adaptability, premunition is strong, meat is superior
Point.Aquatic products research institute of Hubei Province introduces the species from the U.S. for the first time within 1984, supported and promoted by the examinations of many years, has become
A kind of Important Economic fish that state generally cultivates.Channel catfish can take the photograph the mixed feed fed under Artificial feeding conditions
It eats, natural bait, such as aquatic insect, plankton, wheel animalcule, organic debris and algae etc. in water of also ingesting.
River crab scientific name Eriocheir sinensis (Eriocheir sinensis) belong to Decapoda, Grapsidae, Eriocheir, it is Jiangsu
Save most characteristic special aquaculture kind, in recent years, by the expansion of culture of Chinese mitten crab area, production cost rise year by year with
And commodity crab consumption market fails the influence of the effectively unfavorable factors such as expansion, culture of Chinese mitten crab benefit sharp fall.River crab at present
Cultivation is substantially high density intensive culture mode, and pond load capacity is big, and water environment is poor, and moss breeds seriously, right
River crab ingests and grows unfavorable, and river crab disease incidence is high.Therefore it is badly in need of exploring the cultivation mould of the best buy crab of big specification
Formula, while collocation cultivation can make full use of Water space with the aquaculture kind of river crab mutualism in crab pond, improve crab
The production capacity and economic benefit of aquaculture and ecological benefits in pond.
Summary of the invention
The purpose of the present invention is to provide the ecological cultivation method of a kind of river crab intercropping freshwater shrimp and channel catfish, Neng Gouchong
Divide and utilize cultivation water environment, improve bait utilization, reduce the incidence probability of breed variety, increases yield per unit area.
River crab, freshwater shrimp and channel catfish are carried out ecological intercropping by the present invention, and fish, shrimp, crab mutual benefit coexists, makes full use of
The dump energy of the ecosystem carries out the utilization of comprehensive and reasonable to organic contamination source, forms a structurally reasonable, energy conversion rate
High, profitable benign fishery biologic environment, to achieve the purpose that improve cultivation overall economic efficiency.
Technical solution of the invention:
A kind of ecological cultivation method of river crab intercropping freshwater shrimp and channel catfish, it is characterised in that: comprise the following specific steps that:
1, pond prepares: selection is had abundant water resources, into convenient pond is drained, and digs deep setting circular groove in the pond face Nei Yansan, on one side
Beach face is set；Pond discharge outlet is lower than water inlet, filter screen on mask of intaking, and water inlet and discharge outlet are diagonally positioned；?
Escaping-preventing facilities are arranged in pond surrounding, and escaping-preventing facilities use height to surround for the double-layer plastic of 50cm, double-layer plastic is fixed on wood
On rod, a waddy is fixed every 2m, is buried in the earth 20-30cm, and tilted 15 ° to pond；
2, clean up the pond disinfection: seed, which is put in a suitable place to breed, is exposed to the sun in pond one week the previous moon, then to 20-50cm is added water in pond, with drift
The disinfection of white powder water full pool spilling head, bleaching powder dosage are 100-150kg/ mus, 7-10d heel row solid carbon dioxide;
3, kind grass throws spiral shell: planting water plant after pond disinfection, is planted using dividing between furrow, every three row of ridge cultivation kind water plant, line-spacing 1.2m is planted
Careless row to the pool to perpendicular or parallel；The Ching Ming Festival before fresh and alive spiral shell is launched into pond, 400-500kg per acre；
4, seed is put in a suitable place to breed: stocking size in March is young crab 600-800/mu of 80-100/jin；Freshwater shrimp takes two crops in one year
It puts in a suitable place to breed, first batch is 10-20kg/ mus of shrimp species of 2-3cm/ tail in 2 months early and middle ten days, stocking size, and second batch, in early July, puts
Support ten thousand tails of shrimp seedling 5-6/mu that specification is 1-2cm；Channel catfish is put in a suitable place to breed in early and middle ten days in March, and specification is 40-50g/ tail, is put in a suitable place to breed
Density is 200-300 tail/mu, described to put young crab and complete, physical strong, the movable agility of shrimp species appendage in a suitable place to breed, described to put young crab in a suitable place to breed
With 3-5% common salt aqueous solution dipping bath 5-10min before being put in a suitable place to breed with shrimp species；
5, feedstuff feeding: river crab puts early period i.e. March to June in a suitable place to breed, mainly based on concentrated feed, supplemented by greenfeed, and is aided with
Crush it is cooked after small fish, day feeding volume is the 5%-7% of river crab gross weight, mid-term, that is, June to August part based on greenfeed,
Supplemented by concentrated feed, and it is aided with vegetal bait, day feeding volume is the 3%-5% of river crab gross weight, and later period, that is, August part is later with fresh small
Trash fish and concentrated feed are fed, and day feeding volume is the 7-10% of river crab gross weight, are fed day 2 times, the morning, 8:00-9:00 fed day
The 30%-35% of total amount, surplus 18:00-19:00 in afternoon are fed；Freshwater shrimp and channel catfish are not necessarily to other bait throwing in；
6, pond water pH value 7.5-8.5, transparency 20-25cm, dissolved oxygen 4mg/L or more water quality management: are kept；Summer high temperature day
Gas keeps peak level, and it is primary to change water every 10-15d, and each quantity of exchanged water is water level 15-20cm；Every 15-20d makes during the 6-9 month
It is primary with microorganism formulation, it is primary monthly to change agent the bottom of with；High temperature season fine day noon opens aerator 1-4h, next morning when cloudy
Open aerator 1-3h, midnight opens aerator 1-7h when unbroken rainy days；
7, disease control: adhere to relying mainly on prevention, prevent overweighting and control, prevent and treat the principle combined, seed uses the water logging of 3-5% salt before putting in a suitable place to breed
Bathe 5-10min；6-9 month, a microorganism formulation was used every 15-20d；The season of growth monthly uses 10-15kg/ mus of bleaching
Dusting water full pool spilling head；
8, catch: harvesting lists river crab successively after September part；First batch put in a suitable place to breed freshwater shrimp June current year successively harvesting list,
Second batch lists in second year harvesting in January；Channel catfish does the listing of pool harvesting in second year January.
Preferably, the step 1 middle ring ditch depth 1.2-1.5m, area be pond 20-30%, for river crab it is hidden shelling and
High temperature is avoided heat；Beach face slope ratio 1:2-2.5, area are the 20-25% in pond, inhabit and look for food above for river crab.
Preferably, in the step 3 water plant be waterweed, hornwort, eel grass and hydrilla verticillata multi items interplanting, furrow with
2.4m is spaced between furrow, summer does not carry out waterweed cutting stubble, but utilizes and add water and change water, maintains waterweed growth.
Preferably, in the step 5 vegetal bait be one of pumpkin, duckweed, cooking shredded potato, wheat bran or two kinds and
Two or more combinations.
Preferably, probiotics are one of bacillus, nitrobacteria, photosynthetic bacteria, EM bacterium in the step 6
Or more two kinds and two or more combinations.
Preferably, it is one of quick lime, zeolite powder or two kinds of combinations that step 6 indsole, which changes agent,.
Beneficial effects of the present invention: the present invention provides a kind of river crab, freshwater shrimp and channel catfish ecological polyculturing modes, make
Crab, shrimp, the fish mutual benefit in pond coexist.Channel catfish is ominivore-fish, can swallow small fish and sick shrimp, can also clear up pond
Residual bait and algae in the pool can inhibit shrimp crab viral in addition, fish body surface can secrete one or more of substances.River crab and spot
Protein content is high in the excrement of point Cha Wei Channel-catfish discharge, and easily aggregation pond bottom destroys water environment, ruins water quality, causes disease
Risk increases, and freshwater shrimp is higher to dietary protein content requirement, the excrement of can ingest river crab and channel catfish, purified water
Matter reduces the pollution that cultivation generates itself, keeps good breeding environment, on the basis of not throwing or feeding material less, realizes high
It produces, technical effect efficiently, ecological.
Specific embodiment
Below with reference to embodiment, the present invention is described further.
Embodiment 1
A kind of ecological cultivation method of river crab intercropping freshwater shrimp and channel catfish, comprising the following steps:
1, pond prepares: the rectangle pond that selection is had abundant water resources, convenient, area is 2.6 mu into draining, three face ring ditch depths
1.5m, beach face slope ratio are 1:2；Filter screen on water inlet mask, and water inlet and discharge outlet are diagonally positioned；Configure 1.5kw micropore
One, aerator；In pond, double-layer plastic cloth is arranged in surrounding, is fixed with waddy, and tilted 15 ° to pond；
2, clean up the pond disinfection: seed, which is put in a suitable place to breed, is exposed to the sun in pond one week the previous moon, then to 20cm is added water in pond, uses bleaching powder
Change the disinfection of water full pool spilling head, bleaching powder dosage is 150kg/ mus, 7d heel row solid carbon dioxide；
3, kind grass throws spiral shell: planting water plant after pond disinfection, is planted using dividing between furrow, waterweed, hornwort, eel grass and hydrilla verticillata are more
Kind interplanting, every three row of ridge cultivation kind water plant, line-spacing are 1.2 m, are spaced 2.4m between furrow and furrow, plant careless row to the pool to vertical；
The Ching Ming Festival before fresh and alive spiral shell is launched into pond, it is disposable to launch 500kg/ mus；
4, seed is put in a suitable place to breed: putting river crab March in a suitable place to breed, young crab specification is 80/jin, and breeding density is 800/mu；First batch of freshwater shrimp
It puts in a suitable place to breed in early Febuary, stocking size is 10kg/ mus of shrimp species of 2.5cm/ tail, and second batch was put in a suitable place to breed in early July, and stocking size is
50,000 tails of shrimp seedling/mu of 1.5cm；Channel catfish is put in a suitable place to breed in mid-March, and specification is 50g/ tail, and breeding density is 260 tails/mu,
It puts young crab in a suitable place to breed and shrimp species appendage is complete, physical strong, all seeds are put in a suitable place to breed preceding with 3% common salt aqueous solution dipping bath 6min；
5, feedstuff feeding: March to June supplemented by greenfeed, and is aided with small after crushing is cooked mainly based on concentrated feed
Trash fish, day feeding volume are the 7% of river crab gross weight, and June to August part is aided with vegetalitas based on greenfeed, supplemented by concentrated feed
Bait, day feeding volume are the 4% of river crab gross weight, are fed after August part with fresh small fish and concentrated feed, day feeding volume is
The 10% of river crab gross weight, will regard the situations such as weather, water temperature, water quality in practice and river crab food situation reasonably carries out in time
Adjustment；Day feeds 2 times, and morning 8:00-9:00 feeds the 30% of daily amount, and surplus 18:00-19:00 in afternoon is fed；Freshwater shrimp and spot
Point Cha Wei Channel-catfish is not necessarily to other bait throwing in；
6, pond water pH value 7.5-8.5, transparency 20-25cm, dissolved oxygen 4mg/L or more water quality management: are kept；Summer high temperature
Weather keeps peak level, and it is primary to change water every 10d, and each quantity of exchanged water is water level 20cm；Every 15d uses gemma during the 6-9 month
Bacillus and photosynthetic bacteria are primary, monthly improve water quality with quick lime；High temperature season fine day noon opens aerator 3h, next day when cloudy
Early morning opens aerator 2h, and midnight opens aerator 5h when unbroken rainy days；
7, disease control: adhere to relying mainly on prevention, prevent overweighting and control, prevent and treat the principle combined, seed puts preceding 3% salt water dipping bath in a suitable place to breed
10min；6-9 month, a bacillus and photosynthetic bacteria were used every 15d；The season of growth monthly uses 10kg/ mus of bleaching powder
Change water full pool spilling head；
8, catch: harvesting lists river crab successively after September part；First batch put in a suitable place to breed freshwater shrimp June current year successively harvesting list,
Second batch lists in second year harvesting in January；Channel catfish does the listing of pool harvesting in second year January.
By the ecological cultivation method of above river crab intercropping freshwater shrimp and channel catfish, pond yields and benefit such as 1 institute of table
Show:
1 pond of table harvest and vehicle benefits situation statistical form
Embodiment 2
A kind of ecological cultivation method of river crab intercropping freshwater shrimp and channel catfish, comprising the following steps:
1, pond prepares: the rectangle pond that selection is had abundant water resources, convenient, area is 2 mu into draining, three face ring ditch depth 1.5m,
Beach face slope ratio is 1:2；Filter screen on water inlet mask, and water inlet and discharge outlet are diagonally positioned；Configure 1.5kw micro-pore oxygenation machine
One；In pond, double-layer plastic cloth is arranged in surrounding, is fixed with waddy, and tilted 15 ° to pond；
2, clean up the pond disinfection: seed, which is put in a suitable place to breed, is exposed to the sun in pond one week the previous moon, then to 20cm is added water in pond, uses bleaching powder
Change the disinfection of water full pool spilling head, bleaching powder dosage is 150kg/ mus, 7d heel row solid carbon dioxide；
3, kind grass throws spiral shell: planting water plant after pond disinfection, is planted using dividing between furrow, waterweed, hornwort, eel grass and hydrilla verticillata are more
Kind interplanting, every three row of ridge cultivation kind water plant, line-spacing are 1.2 m, are spaced 2.4m between furrow and furrow, plant careless row to the pool to vertical；
The Ching Ming Festival before fresh and alive spiral shell is launched into pond, it is disposable to launch 500kg/ mus；
4, seed is put in a suitable place to breed: putting 600/mu of young crab that average size is 84/jin March in a suitable place to breed；Early Febuary puts first batch of blueness in a suitable place to breed
Shrimp puts 15kg/ mus of shrimp species that average size is 2cm/ tail in a suitable place to breed, and early July puts second batch of freshwater shrimp in a suitable place to breed, and putting average size in a suitable place to breed is 1cm
60,000 tails of shrimp seedling/mu；Stocking size mid-March is 300 tails of channel catfish fingerling/mu of 45g/ tail.Put in a suitable place to breed young crab and
Shrimp species appendage is complete, physical strong, and all seeds are put in a suitable place to breed preceding with 3% common salt aqueous solution dipping bath 6min；
5, feedstuff feeding: March to June supplemented by greenfeed, and is aided with small after crushing is cooked mainly based on concentrated feed
Trash fish, day feeding volume are the 7% of river crab gross weight, and June to August part is aided with vegetalitas based on greenfeed, supplemented by concentrated feed
Bait, day feeding volume are the 4% of river crab gross weight, are fed after August part with fresh small fish and concentrated feed, day feeding volume is
The 10% of river crab gross weight, will regard the situations such as weather, water temperature, water quality in practice and river crab food situation reasonably carries out in time
Adjustment；Day feeds 2 times, and morning 8:00-9:00 feeds the 30% of daily amount, and surplus 18:00-19:00 in afternoon is fed；Freshwater shrimp and spot
Point Cha Wei Channel-catfish is not necessarily to other bait throwing in；
6, pond water pH value 7.5-8.5, transparency 20-25cm, dissolved oxygen 4mg/L or more water quality management: are kept；Summer high temperature
Weather keeps peak level, and it is primary to change water every 10d, and each quantity of exchanged water is water level 20cm；Every 15d uses gemma during the 6-9 month
Bacillus and photosynthetic bacteria are primary, monthly improve water quality with quick lime；High temperature season fine day noon opens aerator 3h, next day when cloudy
Early morning opens aerator 2h, and midnight opens aerator 5h when unbroken rainy days；
7, disease control: adhere to relying mainly on prevention, prevent overweighting and control, prevent and treat the principle combined, seed puts preceding 3% salt water dipping bath in a suitable place to breed
10min；6-9 month, a bacillus and photosynthetic bacteria were used every 15d；The season of growth monthly uses 10kg/ mus of bleaching powder
Change water full pool spilling head.
By the ecological cultivation method of the above river crab, freshwater shrimp and channel catfish, pond yields and benefit are as shown in table 2:
2 pond of table harvest and vehicle benefits situation statistical form
Embodiment 3
A kind of ecological cultivation method of river crab intercropping freshwater shrimp and channel catfish, comprising the following steps:
1, pond prepares: the rectangle pond that selection is had abundant water resources, convenient, area is 3 mu into draining, three face ring ditch depth 1.5m,
Beach face slope ratio is 1:2；Filter screen on water inlet mask, and water inlet and discharge outlet are diagonally positioned；Configure 1.5kw micro-pore oxygenation machine
One；In pond, double-layer plastic cloth is arranged in surrounding, is fixed with waddy, and tilted 15 ° to pond；
2, clean up the pond disinfection: seed, which is put in a suitable place to breed, is exposed to the sun in pond one week the previous moon, then to 20cm is added water in pond, uses bleaching powder
Change the disinfection of water full pool spilling head, bleaching powder dosage is 150kg/ mus, 7d heel row solid carbon dioxide；
3, kind grass throws spiral shell: planting water plant after pond disinfection, is planted using dividing between furrow, waterweed, hornwort, eel grass and hydrilla verticillata are more
Kind interplanting, every three row of ridge cultivation kind water plant, line-spacing are 1.2 m, are spaced 2.4m between furrow and furrow, plant careless row to the pool to vertical；
The Ching Ming Festival before fresh and alive spiral shell is launched into pond, it is disposable to launch 500kg/ mus；
4, seed is put in a suitable place to breed: putting 800/mu of young crab that average size is 90/jin March in a suitable place to breed；Early Febuary puts first batch of blueness in a suitable place to breed
Shrimp puts 10kg/ mus of shrimp species that average size is 3cm/ tail in a suitable place to breed, and early July puts second batch of freshwater shrimp in a suitable place to breed, and putting average size in a suitable place to breed is 1cm
60,000 tails of shrimp seedling/mu；Stocking size mid-March is 300 tails of channel catfish fingerling/mu of 40g/ tail, puts young crab and shrimp in a suitable place to breed
Kind appendage is complete, physical strong, and all seeds are put in a suitable place to breed preceding with 3% common salt aqueous solution dipping bath 6min；
5, feedstuff feeding: March to June supplemented by greenfeed, and is aided with small after crushing is cooked mainly based on concentrated feed
Trash fish, day feeding volume are the 7% of river crab gross weight, and June to August part is aided with vegetalitas based on greenfeed, supplemented by concentrated feed
Bait, day feeding volume are the 4% of river crab gross weight, are fed after August part with fresh small fish and concentrated feed, day feeding volume is
The 10% of river crab gross weight, will regard the situations such as weather, water temperature, water quality in practice and river crab food situation reasonably carries out in time
Adjustment；Day feeds 2 times, and morning 8:00-9:00 feeds the 30% of daily amount, and surplus 18:00-19:00 in afternoon is fed；Freshwater shrimp and spot
Point Cha Wei Channel-catfish is not necessarily to other bait throwing in.
6, pond water pH value 7.5-8.5, transparency 20-25cm, dissolved oxygen 4mg/L or more water quality management: are kept；Summer
Hot weather keeps peak level, and it is primary to change water every 10d, and each quantity of exchanged water is water level 20cm；Every 15d is used during the 6-9 month
Bacillus and photosynthetic bacteria are primary, monthly improve water quality with quick lime；High temperature season fine day noon opens aerator 3h, when cloudy
Next morning opens aerator 2h, and midnight opens aerator 5h when unbroken rainy days；
7, disease control: adhere to relying mainly on prevention, prevent overweighting and control, prevent and treat the principle combined, seed puts preceding 3% salt water dipping bath in a suitable place to breed
10min；6-9 month, a bacillus and photosynthetic bacteria were used every 15d；The season of growth monthly uses 10kg/ mus of bleaching powder
Change water full pool spilling head.
By the ecological cultivation method of the above river crab, freshwater shrimp and channel catfish, pond yields and benefit are as shown in table 3:
3 pond of table harvest and vehicle benefits situation statistical form
Claims (6)
1. a kind of ecological cultivation method of river crab intercropping freshwater shrimp and channel catfish, it is characterised in that: comprise the following specific steps that:
1, pond prepares: selection is had abundant water resources, into convenient pond is drained, and digs deep setting circular groove in the pond face Nei Yansan, on one side
Beach face is set；Pond discharge outlet is lower than water inlet, filter screen on mask of intaking, and water inlet and discharge outlet are diagonally positioned；?
Escaping-preventing facilities are arranged in pond surrounding, and escaping-preventing facilities use height to surround for the double-layer plastic of 50cm, double-layer plastic is fixed on wood
On rod, a waddy is fixed every 2m, is buried in the earth 20-30cm, and tilted 15 ° to pond；
2, clean up the pond disinfection: seed, which is put in a suitable place to breed, is exposed to the sun in pond one week the previous moon, then to 20-50cm is added water in pond, with drift
The disinfection of white powder water full pool spilling head, bleaching powder dosage are 100-150kg/ mus, 7-10d heel row solid carbon dioxide;
3, kind grass throws spiral shell: planting water plant after pond disinfection, is planted using dividing between furrow, every three row of ridge cultivation kind water plant, line-spacing 1.2m is planted
Careless row to the pool to perpendicular or parallel；The Ching Ming Festival before fresh and alive spiral shell is launched into pond, 400-500kg per acre；
4, seed is put in a suitable place to breed: stocking size in March is young crab 600-800/mu of 80-100/jin；Freshwater shrimp takes two crops in one year
It puts in a suitable place to breed, first batch is 10-20kg/ mus of shrimp species of 2-3cm/ tail in 2 months early and middle ten days, stocking size, and second batch, in early July, puts
Support ten thousand tails of shrimp seedling 5-6/mu that specification is 1-2cm；Channel catfish is put in a suitable place to breed in early and middle ten days in March, and specification is 40-50g/ tail, is put in a suitable place to breed
Density is 200-300 tail/mu, described to put young crab and complete, physical strong, the movable agility of shrimp species appendage in a suitable place to breed, described to put young crab in a suitable place to breed
With 3-5% common salt aqueous solution dipping bath 5-10min before being put in a suitable place to breed with shrimp species；
5, feedstuff feeding: river crab puts early period i.e. March to June in a suitable place to breed, mainly based on concentrated feed, supplemented by greenfeed, and is aided with
Crush it is cooked after small fish, day feeding volume is the 5%-7% of river crab gross weight, mid-term, that is, June to August part based on greenfeed,
Supplemented by concentrated feed, and it is aided with vegetal bait, day feeding volume is the 3%-5% of river crab gross weight, and later period, that is, August part is later with fresh small
Trash fish and concentrated feed are fed, and day feeding volume is the 7-10% of river crab gross weight, are fed day 2 times, the morning, 8:00-9:00 fed day
The 30%-35% of total amount, surplus 18:00-19:00 in afternoon are fed；Freshwater shrimp and channel catfish are not necessarily to other bait throwing in；
6, pond water pH value 7.5-8.5, transparency 20-25cm, dissolved oxygen 4mg/L or more water quality management: are kept；Summer high temperature day
Gas keeps peak level, and it is primary to change water every 10-15d, and each quantity of exchanged water is water level 15-20cm；Every 15-20d makes during the 6-9 month
It is primary with microorganism formulation, it is primary monthly to change agent the bottom of with；High temperature season fine day noon opens aerator 1-4h, next morning when cloudy
Open aerator 1-3h, midnight opens aerator 1-7h when unbroken rainy days；
7, disease control: adhere to relying mainly on prevention, prevent overweighting and control, prevent and treat the principle combined, seed uses the water logging of 3-5% salt before putting in a suitable place to breed
Bathe 5-10min；6-9 month, a microorganism formulation was used every 15-20d；The season of growth monthly uses 10-15kg/ mus of bleaching
Dusting water full pool spilling head；
8, catch: harvesting lists river crab successively after September part；First batch put in a suitable place to breed freshwater shrimp June current year successively harvesting list,
Second batch lists in second year harvesting in January；Channel catfish does the listing of pool harvesting in second year January.
2. a kind of ecological cultivation method of river crab intercropping freshwater shrimp and channel catfish as described in claim 1, it is characterised in that: institute
Step 1 middle ring ditch depth 1.2-1.5m is stated, area is the 20-30% in pond, is avoided heat for the hidden shelling of river crab and high temperature；Beach face slope ratio
1:2-2.5, area are the 20-25% in pond, inhabit and look for food above for river crab.
3. a kind of ecological cultivation method of river crab intercropping freshwater shrimp and channel catfish as described in claim 1, it is characterised in that: institute
The multi items interplanting that water plant in step 3 is waterweed, hornwort, eel grass and hydrilla verticillata is stated, 2.4m, summer are spaced between furrow and furrow
Waterweed is not carried out in season cutting stubble, but utilize and add water and change water, maintains waterweed growth.
4. a kind of ecological cultivation method of river crab intercropping freshwater shrimp and channel catfish as described in claim 1, it is characterised in that: institute
Stating vegetal bait in step 5 is one of pumpkin, duckweed, cooking shredded potato, wheat bran or two kinds and two or more combinations.
5. a kind of ecological cultivation method of river crab intercropping freshwater shrimp and channel catfish as described in claim 1, it is characterised in that: institute
Stating probiotics in step 6 is one of bacillus, nitrobacteria, photosynthetic bacteria, EM bacterium or two kinds and two kinds more
Combination of the above.
6. a kind of ecological cultivation method of river crab intercropping freshwater shrimp and channel catfish as described in claim 1, it is characterised in that: institute
Stating step 6 indsole to change agent is one of quick lime, zeolite powder or two kinds of combinations.
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