CN103070116A - Method for earlier seedling of freshwater shrimps - Google Patents
Method for earlier seedling of freshwater shrimps Download PDFInfo
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- CN103070116A CN103070116A CN2013100224968A CN201310022496A CN103070116A CN 103070116 A CN103070116 A CN 103070116A CN 2013100224968 A CN2013100224968 A CN 2013100224968A CN 201310022496 A CN201310022496 A CN 201310022496A CN 103070116 A CN103070116 A CN 103070116A
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Abstract
The invention discloses a method for earlier seedling of freshwater shrimps. The method is characterized in that by adopting a heat prevention function of a plastic greenhouse and pool bottom film, processes of culturing parent shrimps, shrimps with eggs and baby shrimps are completed in a culturing pool, and finally a shrimp seed is earlier obtained. The method has the beneficial effects that the plastic greenhouse is utilized to effectively promote a water temperature of culturing the parent shrimps in an earlier stage at lower cost, thus the water temperature is maintained to be stable, sexual glands of the parent shrimps are enabled to earlier develop, meanwhile the affect of a bad weather on culturing the parent shrimps in the early stage is avoided, the processes of laying eggs, hatching and the baby shrimp growth are accelerated, the obtaining of early reproduced freshwater shrimps is realized, the culturing of merchandized shrimps is carried out, freshwater shrimps can earlier appear on the market, the problem of short supply of freshwater shrimps on the market in July and August is solved, and culturing benefits are improved while the requirement of the market is met; and additionally, by the adoption of the pool bottom film, heat preservation is realized, water conservation performance of a culturing pool is improved, the filling of fresh water is reduced, and the effect of promoting and maintaining stability of the water temperature in the culturing pool is further improved.
Description
Technical field
The present invention relates to a kind of method of freshwater shrimp ahead of time seedling-cultivating, belong to shell-fish seed breeding technical field.
Background technology
The growth of crustacean, gonad development, egg reproduction etc. all are subject to impact and the regulation and control of temperature, and water temperature is one of key factor of regulation and control crustacean reproductive physiology.Shrimps are finished gonad development needs certain accumulated temperature, and the maturation of sexual gland depends on the accumulation of effective temperature, and along with water temperature raises, the accumulation of effective temperature is just more, and the gonad development situation of shrimps is just better.
The natural temperature of freshwater shrimp breeding requires more than 18-20 ℃.In Middle And Lower Reaches of Changjiang River, generally at the bottom of the April, natural temperature reaches 18 ℃ substantially, and the part freshwater shrimp begins egg reproduction gradually.At the beginning of large-scale egg reproduction then generally appeared at by the end of May 6 months, this moment, natural temperature maintained more than 20 ℃ substantially.The ovum of freshwater shrimp output adheres on the female shrimp appendage, and the female shrimp of this moment is called shrimp with ovums, and through about 20 days oogenesis hatching, zoea was hatched, and the development by metamorphosis that the young that hatches experiences about 20 days again becomes young shrimp (shrimp seedling), can be used for into forming of shrimp.Therefore, utilize conventional method to breed the shrimp seedling, could obtain the shrimp seedling at the beginning of general early July to 8 month, again through 2 months one-tenth shrimp aquaculture, early September the part freshwater shrimp can reach the listing specification.
Utilize traditional approach to breed freshwater shrimp shrimp seedling, and carry out the cultivation of commercial sized prawn, have many drawbacks.At at first numerous seedling initial stage, natural temperature is lower, and unstable, is unfavorable for freshwater shrimp mate and oviposit and paedomorphosis.Secondly, utilize conventional method to cultivate the shrimp seedling, 7 – have just obtained the shrimp seedling between August, the cultivation of beginning commercial sized prawn, so commercial sized prawn lacks on the market, market freshwater shrimp price is high.And after entering September, commercial sized prawn begins again to concentrate listing, and price glides.If improve numerous seedling initial stage water temperature, impel freshwater shrimp to do sth. in advance egg reproduction, obtain early-breeding seedlings, the product shrimp aquaculture of doing business of going forward side by side can go on the market ahead of time, solves the problem of 7 – freshwater shrimp strained market supplys between August, when meeting the need of market, increases culture benefit.
Summary of the invention
For solving the deficiencies in the prior art, the object of the present invention is to provide a kind of method of freshwater shrimp ahead of time seedling-cultivating, it effectively promotes the parent culture water temperature in early stage with lower cost, the freshwater shrimp parent is grown ahead of time, avoid simultaneously the impact of the early stage adverse weather of parent culture, good environmental condition is provided for freshwater shrimp parent gonad development; Laying eggs after freshwater shrimp parent gonad development is complete, hatching, paedomorphosis stage still can guarantee higher water temperature, shorten the development time of freshwater shrimp embryo and the young, thereby obtain in advance the shrimp seedling.
In order to realize above-mentioned target, the present invention adopts following technical scheme:
A kind of method of freshwater shrimp ahead of time seedling-cultivating is characterized in that, may further comprise the steps:
(1), cultivate the pond and prepare: cultivate the pond and be rectangle, smooth at the bottom of the pond, irrigation and drainage are convenient, the drainage mouth separately, the depth of water is 1 –, 1.5 m, Chi Gengpo is than 1:(2.5 – 3.0), cultivate the pond and be equipped with micro-pore oxygenation pump and artificial shrimp nest;
(2), plastic tunnel setting: plastic tunnel ridge trend is with to cultivate the pond identical, and the 50cm working face is respectively stayed apart from pool side in the length and width two ends, and for operations such as daily bait throwing in, two sides of plastic tunnel long end are provided with manual volume film window, and with self-locking device;
(3), Water filling fertilizing: close shrimp was put in a suitable place to breed front 7 days, cultivated pond new water 50 cm that annotate, and water inlet is with the above silk cover filtering of 60 orders during water filling, and second day behind the new water of annotating is used the fertilizer that ferments through becoming thoroughly decomposed, and fertilizing amount is 30 – 40kg/100 m
2
(4), adding water changes water: growing seedlings, natural temperature is lower in earlier stage, for the ease of heating up, puts the low depth of water of parent shrimp rearing pond employing in early stage in a suitable place to breed, adds gradually later on the high depth of water of water extraction; Add water, change wet concentration and carry out when noon, outdoor water temperature was higher fine, on a small quantity repeatedly, be controlled between 10 –, 15 cm at every turn;
(5), close shrimp puts in a suitable place to breed: choose that body surface is bright and clean, appendage sound, physically fit, movable strong close shrimp, female-male proportion is 3 – 5: 1, throws in to enter to cultivate in the pond, and stocking rate is 1.6-2.0 kg/100 m
2
(6), parent shrimp rearing: close shrimp is put the second day high-quality perfect compound feed of crude protein content more than 32% that begin to throw something and feed in a suitable place to breed, suitably replenishes the fresh food of throwing something and feeding, feed day feeding volume be 4 – 6% of close shrimp body weight, throw something and feed minutes for 2 times; Cultivate water temperature in the pond more than 18-20 ℃ by the open and close controlling of control plastic tunnel volume film window;
(7), shrimp with ovums cultivates: after most of female shrimp begins oogenesis, the shrimp with ovums of regularly taking a sample to check, when the fertilized egg color became taupe and eyespot occurs, to cultivating fertilizer or the compound fertilizer for fishery of executing in the pond through fermentation, amount of application was respectively 30 –, 40 kg/100 m
2, 0.8 –, 1.6 kg/100 m
2Cultivate water temperature in the pond in 22-24 ℃ of scope by the open and close controlling of control plastic tunnel volume film window;
(8), larval culture: after large quantities of freshwater shrimp zoeas occurring, the artificial feed of throwing something and feeding every day are taked full pool spilling head; Water temperature in the control cultivation pond is in 24-28 ℃ of scope;
(9), booth temperature control: fine day was opened the ventilation equipment of booth both sides when noon, temperature was too high, avoided excess Temperature; Embryonic development period and Larval developmental stage will in time be opened the booth ventilation equipment when water temperature surpasses 24 ℃ and 28 ℃, ventilation equipment are closed during the reduction of post sunset temperature again.
The method of aforesaid freshwater shrimp ahead of time seedling-cultivating is characterized in that, the material of aforementioned artificial shrimp nest is the tea tree branch, and per hundred square metres is 3-5.
The method of aforesaid freshwater shrimp ahead of time seedling-cultivating is characterized in that, aforementioned micro-pore oxygenation pump power is 200 watts/mu.
The method of aforesaid freshwater shrimp ahead of time seedling-cultivating is characterized in that, the bottom in aforementioned cultivation pond is equipped with the pond counterdie.
Preferably, aforementioned pond counterdie is PVC single ply waterproofing pad.
The method of aforesaid freshwater shrimp ahead of time seedling-cultivating is characterized in that, aforementioned big plastic hot-shed with it adopts Double-side hot zinc-plated steel frame structure, the top and all adopt all around thickness be the PEP of 0.15mm sharp the film covering.
The method of aforesaid freshwater shrimp ahead of time seedling-cultivating is characterized in that, the roof of aforementioned plastic tunnel is single arch, and arch bar spacing 0.8m rises 6m.
The method of aforesaid freshwater shrimp ahead of time seedling-cultivating is characterized in that, in step (6), when throwing something and feeding feed, throws something and feeds 1/3 the morning, throws something and feeds 2/3 afternoon.
The method of aforesaid freshwater shrimp ahead of time seedling-cultivating is characterized in that, in step (7), 7 – after the fertilising topdressed 1 time in 10 days, executes compound fertilizer for fishery 2 – 4 kg for every mu.
The method of aforesaid freshwater shrimp ahead of time seedling-cultivating is characterized in that, in step (8), the artificial feed of throwing something and feeding are divided into two stages:
A, initial stage: the soya-bean milk 1.0-1.5kg that every day, the every mu of soya bean of throwing something and feeding was made or ripe yolk 4-6, day throwing twice, the morning, daily ration, feeding quantity accounted for 1/3 of day feeding volume, and afternoon, daily ration, feeding quantity accounted for 2/3 of day feeding volume, and Feeding time was two weeks;
B, later stage: the juvenile prawn manufactured feed of throwing something and feeding, daily ration of feeding account for 10 – 15% of shrimp body weight.
The method of aforesaid freshwater shrimp ahead of time seedling-cultivating is characterized in that, in step (7), (8), uses a probiotics every 7-10 days, uses the same day and the second night of probiotics to start in advance aerator.
Preferably, probiotics comprises: EM bacterium, photosynthetic bacteria, bacillus.
The method of aforesaid freshwater shrimp ahead of time seedling-cultivating is characterized in that, splashes with quicklime 10-15kgization water every 10-15 days every mu of cultivation ponds, keeps water pH value in the 7.0-8.5 scope.
The method of aforesaid freshwater shrimp ahead of time seedling-cultivating is characterized in that, the transparency of cultivating the pool inner water body is: early stage 25-30cm, later stage 30-35cm.
Usefulness of the present invention is: utilize plastic tunnel, in limited range, effectively promote the parent culture water temperature in early stage with lower cost, keep the stable of water temperature, parent's sexual gland is grown ahead of time, avoid simultaneously the impact of the early stage adverse weather of parent culture, accelerate to lay eggs, hatching and during larval development, realize the acquisition of freshwater shrimp early-breeding seedlings, the product shrimp aquaculture of doing business of going forward side by side, can go on the market ahead of time, solve the problem of 7 – freshwater shrimp strained market supplys between August, when meeting the need of market, increase culture benefit; The use of pond counterdie improves the water retention property of cultivating the pond in insulation, reduce the filling of new water, further improves and cultivates the lifting of pond water temperature in the booth and keep stable effect; Utilize volume film window and a series of water quality, substrate regulation measure, regulate and control flexibly water temperature, water quality, substrate, guarantee that water temperature, water quality, the substrate of whole nursery stage satisfies the requirement that freshwater shrimp is grown seedlings.
Description of drawings
Fig. 1 is the schematic diagram of used cultivation pond and plastic tunnel in the method for the invention;
The implication of Reference numeral among the figure: 1-water inlet, 2-discharge outlet, 3-Chi Geng, 4-microporous pipe disk, 5-artificial shrimp nest, 6-working face, 7-volume film window, 8-door.
Embodiment
Below in conjunction with the drawings and specific embodiments the present invention is done concrete introduction.
Paper is used cultivation pond and plastic tunnel in the method for the invention.
With reference to Fig. 1, to cultivate the pond and be rectangle, length and width is respectively 50 m, 10 m, and area is 500 m
2, East and West direction is long, and is smooth at the bottom of the pond, and irrigation and drainage are convenient, and water inlet 1 separates with discharge outlet 2, and the depth of water is 1 –, 1.5 m, the slope on the ridge, pond 3 is than being 1:(2.5 – 3.0), cultivate the pond and be equipped with a micro-pore oxygenation pump (not shown), and per 100 m
2Assemble 1 microporous pipe disk 4 and 3 artificial shrimp nests 5, artificial shrimp nest 5 adopts the tea tree branch to make, and is used for perching for close shrimp.It should be noted that the size of cultivating the pond is not limited to this.
Big plastic hot-shed with it adopts Double-side hot zinc-plated steel frame structure, the top and all adopt all around thickness be the PEP of 0.15 mm sharp the film covering.Plastic tunnel ridge trend is identical with the cultivation pond, and 50cm working face 6 is respectively stayed apart from pool side in the length and width two ends, is used for the operations such as daily bait throwing in.The booth roof is single arch type, span 11 m, and arch bar spacing 0.8 m rises 6 m.A fan push-and-pull moving door 8 is respectively established at middle part, booth thing two sides, and it selects the greenhouse Special aluminum alloy profile, guarantees sealing thermal insulation, and covering is the PC plate.Two sides of plastic tunnel long end are provided with manual volume film window 7, and with self-locking device, can freely rest on arbitrary height, and the height of volume film window 7 is 1.8 meters, and length is identical with booth length, and 25 order fly nets (not shown) are equipped with at the place of windowing.
Heat insulation effect for the reinforced plastics booth, improve simultaneously the water retention property of cultivating the pond, reduce the filling of new water, further improve and cultivate the lifting of pond water temperature in the booth and keep stable effect, as a kind of preferred scheme, the bottom of cultivating the pond also is equipped with pond counterdie (not shown), more preferably, above-mentioned pond counterdie is PVC single ply waterproofing pad, and the characteristic such as it has uvioresistant and ozone, anti tear, anti-ly freezes, without putrefaction has the effects such as good water conservation, fertilizer conservation, insulation.
After cultivation pond and plastic tunnel construction are complete, next prepare to cultivate the freshwater shrimp early-breeding seedlings.
Embodiment 1
(1), Water filling fertilizing: close shrimp was put in a suitable place to breed front 7 days, cultivated pond new water 50 cm that annotate, and water inlet is with the above silk cover filtering of 60 orders during water filling, and second day behind the new water of annotating is used the fertilizer that ferments through becoming thoroughly decomposed, and fertilizing amount is 30kg/100 m
2
(2), adding water changes water: growing seedlings, natural temperature is lower in earlier stage, for the ease of heating up, puts the low depth of water of parent shrimp rearing pond employing in early stage in a suitable place to breed, adds gradually later on the high depth of water of water extraction; Add water, change wet concentration and carry out when noon, outdoor water temperature was higher fine, on a small quantity repeatedly, be controlled between 10 –, 15 cm at every turn.
(3), close shrimp is put in a suitable place to breed: cultivate water temperature in the pond more than 18-20 ℃ by the open and close controlling of control plastic tunnel volume film window, then get that body surface is bright and clean, appendage sound, physically fit, movable strong close shrimp, more than long 4 cm of female shrimp body, more than long 5.5 cm of male shrimp body, female-male proportion is 3: 1, throw in to enter to cultivate in the pond, stocking rate is 1.6 kg/100 m
2
(4), parent shrimp rearing: close shrimp is put the second day high-quality perfect compound feed of crude protein content more than 32% that begin to throw something and feed in a suitable place to breed, suitably replenish the fresh foods such as spiral shell meat, freshwater mussel meat, the flesh of fish of throwing something and feeding, feed day, feeding volume was 4% of close shrimp body weight, divide and throw something and feed for 2 times, the morning 8:00～10:00,1/3 of day feeding volume of throwing something and feeding, afternoon 4:00～6:00,2/3 of day feeding volume of throwing something and feeding.
(5), shrimp with ovums is cultivated: after most of female shrimp begins oogenesis, cultivate water temperature in the pond in 22-24 ℃ of scope by the switching control control of control plastic tunnel volume film window, the shrimp with ovums of regularly taking a sample to check, when the fertilized egg color becomes taupe and eyespot occurs, to cultivating the fertilizer of executing in the pond through fermentation, amount of application is 30 kg/100 m
2After 7 days, topdress 1 time, execute compound fertilizer for fishery 2kg for every mu.
At the shrimp with ovums breeding phase, the transparency of water body is controlled in the 25-30cm scope, every probioticses such as EM bacterium of use in 7 days, photosynthetic bacteria, bacillus, be used for improving water quality, use the same day and the second night of probiotics to start in advance aerator; And, in this stage, splash with quicklime 15kgization water every 15 days every mu of cultivation ponds, keep water pH value in the 7.0-8.5 scope.
(6), larval culture: after large quantities of freshwater shrimp zoeas occurring, in 24-28 ℃ of scope, the artificial feed of throwing something and feeding every day are taked full pool spilling head by the water temperature in the switching control control cultivation pond of control plastic tunnel volume film window.Initial stage, the soya-bean milk 1.0kg that every day, the every mu of soya bean of throwing something and feeding was made, day throwing twice, the morning, daily ration, feeding quantity accounted for 1/3 of day feeding volume, and afternoon, daily ration, feeding quantity accounted for 2/3 of day feeding volume, and Feeding time was two weeks; After two weeks, the juvenile prawn manufactured feed of throwing something and feeding, daily ration of feeding accounts for 10% of shrimp body weight, until the young becomes the shrimp seedling.
In the larval culture stage, the transparency of water body is controlled at 25-30cm in earlier stage, and the later stage is 30-35cm, uses a probiotics every 7 days, is used for improving water quality, uses the same day and the second night of probiotics to start in advance aerator; And, in this stage, splash with quicklime 15kgization water every 15 days every mu of cultivation ponds, keep water pH value in the 7.0-8.5 scope.
Embodiment 2
(1), Water filling fertilizing: close shrimp was put in a suitable place to breed front 7 days, cultivated pond new water 50 cm that annotate, and water inlet is with the above silk cover filtering of 60 orders during water filling, and second day behind the new water of annotating is used the fertilizer that ferments through becoming thoroughly decomposed, and fertilizing amount is 40kg/100 m
2
(2), adding water changes water: growing seedlings, natural temperature is lower in earlier stage, for the ease of heating up, puts the low depth of water of parent shrimp rearing pond employing in early stage in a suitable place to breed, adds gradually later on the high depth of water of water extraction; Add water, change wet concentration and carry out when noon, outdoor water temperature was higher fine, on a small quantity repeatedly, be controlled between 10 –, 15 cm at every turn.
(3), close shrimp is put in a suitable place to breed: cultivate water temperature in the pond more than 18-20 ℃ by the open and close controlling of control plastic tunnel volume film window, then get that body surface is bright and clean, appendage sound, physically fit, movable strong close shrimp, female-male proportion is 5: 1, throw in to enter to cultivate in the pond, stocking rate is 2.0 kg/100 m
2
(4), parent shrimp rearing: close shrimp is put the second day high-quality perfect compound feed of crude protein content more than 32% that begin to throw something and feed in a suitable place to breed, suitably replenish the fresh foods such as spiral shell meat, freshwater mussel meat, the flesh of fish of throwing something and feeding, feed day, feeding volume was 6% of close shrimp body weight, divide and throw something and feed for 2 times, the morning 8:00～10:00,1/3 of day feeding volume of throwing something and feeding, afternoon 4:00～6:00,2/3 of day feeding volume of throwing something and feeding.
(5), shrimp with ovums is cultivated: after most of female shrimp begins oogenesis, cultivate water temperature in the pond in 22-24 ℃ of scope by the open and close controlling of control plastic tunnel volume film window, the shrimp with ovums of regularly taking a sample to check, when the fertilized egg color becomes taupe and eyespot occurs, execute compound fertilizer for fishery to cultivating in the pond, amount of application is 1.6 kg/100 m
2After 10 days, topdress 1 time, execute compound fertilizer for fishery 4kg for every mu.
At the shrimp with ovums breeding phase, the transparency of water body is controlled in the 25-30cm scope, every probioticses such as EM bacterium of use in 10 days, photosynthetic bacteria, bacillus, be used for improving water quality, use the same day and the second night of probiotics to start in advance aerator; And, in this stage, splash with quicklime 10kgization water every 10 days every mu of cultivation ponds, keep water pH value in the 7.0-8.5 scope.
(6), larval culture: after large quantities of freshwater shrimp zoeas occurring, in 24-28 ℃ of scope, the artificial feed of throwing something and feeding every day are taked full pool spilling head by the water temperature in the open and close controlling cultivation pond of control plastic tunnel volume film window.At the initial stage, 4 in the ripe yolk of throwing something and feeding every mu of every day day throws twice, and the morning, daily ration, feeding quantity accounted for 1/3 of day feeding volume, and afternoon, daily ration, feeding quantity accounted for 2/3 of day feeding volume, and Feeding time was two weeks; After two weeks, the juvenile prawn manufactured feed of throwing something and feeding, daily ration of feeding accounts for 15% of shrimp body weight, until the young becomes the shrimp seedling.
In the larval culture stage, the transparency of water body is controlled at 25-30cm in earlier stage, and the later stage is in the 30-35cm scope, every probioticses such as EM bacterium of use in 7 days, photosynthetic bacteria, bacillus, be used for improving water quality, use the same day and the second night of probiotics to start in advance aerator; And, in this stage, splash with quicklime 15kgization water every 15 days every mu of cultivation ponds, keep water pH value in the 7.0-8.5 scope.
In above-described embodiment 1 and embodiment 2, cultivate pond and plastic tunnel build complete after, come into operation from just beginning by the end of March, namely begin water filling, apply fertilizer, add water, change water, prepare to throw in freshwater shrimp; At the beginning of 4 months, close shrimp is put in a suitable place to breed in the cultivation pond, carried out parent shrimp rearing, in this stage, by the water temperature in the plastic tunnel rising cultivation pond, impel the freshwater shrimp sexual gland to grow in advance, shift to an earlier date oogenesis, lay eggs; At the beginning of 5 months, most of female shrimp begins oogenesis, cultivate through about 20 days shrimp with ovums, large quantities of freshwater shrimp zoeas appears in late May, through about 20 days larval culture, can obtain the freshwater shrimp early-breeding seedlings as far back as mid-June again, last again through individual month commercial sized prawn cultivation of 1-2, freshwater shrimp can go on the market in mid-July the earliest, has solved the problem of 7 – freshwater shrimp strained market supplys between August.
And traditional freshwater shrimp shrimp seedling of breeding, take In Middle And Lower Reaches of Changjiang River as example, generally from by the end of April, when natural temperature reaches more than 18 ℃ substantially, the part freshwater shrimp begins egg reproduction gradually, at the beginning of large-scale egg reproduction then generally appeared at by the end of May 6 months, shrimp with ovums was through about 20 days oogenesis hatching, and zoea is hatched, the development by metamorphosis that the young experiences about 20 days again becomes the shrimp seedling, that is to say, utilize traditional method to breed the shrimp seedling, generally will at the beginning of early July to 8 month, could obtain the shrimp seedling.
Adopt breeding method of the present invention, can obtain early-breeding seedlings, so that ahead of time listing of commercial sized prawn solves the problem of 7 – freshwater shrimp strained market supplys between August, when meeting the need of market, also can increase culture benefit; In addition, breeding method of the present invention, its nurturing an environment is relatively stable, controlled, can improve the survival rate of shrimp seedling.
Need to prove that above-described embodiment does not limit the present invention in any form, all employings are equal to replaces or technical scheme that the mode of equivalent transformation obtains, all drops in protection scope of the present invention.
Claims (12)
1. the method for a freshwater shrimp ahead of time seedling-cultivating is characterized in that, may further comprise the steps:
(1), cultivate the pond and prepare: cultivate the pond and be rectangle, smooth at the bottom of the pond, irrigation and drainage are convenient, the drainage mouth separately, the depth of water is 1 –, 1.5 m, Chi Gengpo is than 1:(2.5 – 3.0), cultivate the pond and be equipped with micro-pore oxygenation pump and artificial shrimp nest;
(2), plastic tunnel setting: plastic tunnel ridge trend is with to cultivate the pond identical, and the 50cm working face is respectively stayed apart from pool side in the length and width two ends, and for operations such as daily bait throwing in, two sides of plastic tunnel long end are provided with manual volume film window, and with self-locking device;
(3), Water filling fertilizing: close shrimp was put in a suitable place to breed front 7 days, cultivated pond new water 50 cm that annotate, and water inlet is with the above silk cover filtering of 60 orders during water filling, and second day behind the new water of annotating is used the fertilizer that ferments through becoming thoroughly decomposed, and fertilizing amount is 30 – 40kg/100 m
2
(4), adding water changes water: growing seedlings, natural temperature is lower in earlier stage, for the ease of heating up, puts the low depth of water of parent shrimp rearing pond employing in early stage in a suitable place to breed, adds gradually later on the high depth of water of water extraction; Add water, change wet concentration and carry out when noon, outdoor water temperature was higher fine, on a small quantity repeatedly, be controlled between 10 –, 15 cm at every turn;
(5), close shrimp puts in a suitable place to breed: choose that body surface is bright and clean, appendage sound, physically fit, movable strong close shrimp, female-male proportion is 3 – 5: 1, throws in to enter to cultivate in the pond, and stocking rate is 1.6-2.0 kg/100 m
2
(6), parent shrimp rearing: close shrimp is put the second day high-quality perfect compound feed of crude protein content more than 32% that begin to throw something and feed in a suitable place to breed, suitably replenishes the fresh food of throwing something and feeding, feed day feeding volume be 4 – 6% of close shrimp body weight, throw something and feed minutes for 2 times; Cultivate water temperature in the pond more than 18-20 ℃ by the open and close controlling of control plastic tunnel volume film window;
(7), shrimp with ovums cultivates: after most of female shrimp begins oogenesis, the shrimp with ovums of regularly taking a sample to check, when the fertilized egg color became taupe and eyespot occurs, to cultivating fertilizer or the compound fertilizer for fishery of executing in the pond through fermentation, amount of application was respectively 30 –, 40 kg/100 m
2, 0.8 –, 1.6 kg/100 m
2Cultivate water temperature in the pond in 22-24 ℃ of scope by the open and close controlling of control plastic tunnel volume film window;
(8), larval culture: after large quantities of freshwater shrimp zoeas occurring, the artificial feed of throwing something and feeding every day are taked full pool spilling head; Water temperature in the control cultivation pond is in 24-28 ℃ of scope;
(9), booth temperature control: fine day was opened the ventilation equipment of booth both sides when noon, temperature was too high, avoided excess Temperature; Embryonic development period and Larval developmental stage will in time be opened the booth ventilation equipment when water temperature surpasses 24 ℃ and 28 ℃, ventilation equipment are closed during the reduction of post sunset temperature again.
2. the method for freshwater shrimp ahead of time seedling-cultivating according to claim 1 is characterized in that, the material of above-mentioned artificial shrimp nest is the tea tree branch, and per hundred square metres is 3-5.
3. the method for freshwater shrimp ahead of time seedling-cultivating according to claim 1 is characterized in that, above-mentioned micro-pore oxygenation pump power is 200 watts/mu.
4. the method for freshwater shrimp ahead of time seedling-cultivating according to claim 1 is characterized in that, the bottom in above-mentioned cultivation pond is equipped with the pond counterdie, and preferred, above-mentioned pond counterdie is PVC single ply waterproofing pad.
5. the method for freshwater shrimp ahead of time seedling-cultivating according to claim 1 is characterized in that, above-mentioned big plastic hot-shed with it adopts Double-side hot zinc-plated steel frame structure, the top and all adopt all around thickness be the PEP of 0.15mm sharp the film covering.
6. the method for freshwater shrimp ahead of time seedling-cultivating according to claim 3 is characterized in that, the roof of above-mentioned plastic tunnel is single arch, and arch bar spacing 0.8m rises 6m.
7. the method for freshwater shrimp ahead of time seedling-cultivating according to claim 1 is characterized in that, in step (6), when throwing something and feeding feed, throws something and feeds 1/3 the morning, throws something and feeds 2/3 afternoon.
8. the method for freshwater shrimp ahead of time seedling-cultivating according to claim 1 is characterized in that, in step (7), 7 – after the fertilising topdressed 1 time in 10 days, executes compound fertilizer for fishery 2 – 4 kg for every mu.
9. the method for freshwater shrimp ahead of time seedling-cultivating according to claim 1 is characterized in that, in step (8), the artificial feed of throwing something and feeding are divided into two stages:
A, initial stage: the soya-bean milk 1.0-1.5kg that every day, the every mu of soya bean of throwing something and feeding was made or ripe yolk 4-6, day throwing twice, the morning, daily ration, feeding quantity accounted for 1/3 of day feeding volume, and afternoon, daily ration, feeding quantity accounted for 2/3 of day feeding volume, and Feeding time was two weeks;
B, later stage: the juvenile prawn manufactured feed of throwing something and feeding, daily ration of feeding account for 10 – 15% of shrimp body weight.
10. the method for freshwater shrimp ahead of time seedling-cultivating according to claim 1, it is characterized in that, in step (7), (8), used a probiotics every 7-10 days, use the same day and the second night of probiotics to start in advance aerator, preferably, probiotics comprises: EM bacterium, photosynthetic bacteria, bacillus.
11. to the method for the described freshwater shrimp ahead of time seedling-cultivating of 8 any one, it is characterized in that according to claim 1, splash with quicklime 10-15kgization water every 10-15 days every mu of cultivation ponds, keep water pH value in the 7.0-8.5 scope.
12. to the method for the described freshwater shrimp ahead of time seedling-cultivating of 8 any one, it is characterized in that according to claim 1 the transparency of cultivating the pool inner water body is: early stage 25-30cm, later stage 30-35cm.
Priority Applications (1)
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| CN103314806A (en) * | 2013-06-26 | 2013-09-25 | 云南良茂农业科技有限公司 | Arc-topped film greenhouse |
| CN104145862A (en) * | 2014-08-06 | 2014-11-19 | 武汉新河湾农业科技有限公司 | Shrimp seed rearing method based on floor heating type greenhouse and shrimp pond adopting method |
| CN105724296A (en) * | 2016-03-11 | 2016-07-06 | 河北省海洋与水产科学研究院 | Method for promoting mating and oogenesis of freshwater shrimps |
| CN111280102A (en) * | 2020-04-10 | 2020-06-16 | 湖州师范学院 | Method for cultivating industrial circulating water seedlings of freshwater shrimps |
| CN111280101A (en) * | 2020-03-27 | 2020-06-16 | 广西壮族自治区水产科学研究院 | Method for breeding crayfishes in early spring in workshop |
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| CN111280102A (en) * | 2020-04-10 | 2020-06-16 | 湖州师范学院 | Method for cultivating industrial circulating water seedlings of freshwater shrimps |
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