CN104756914A - Precise combined feeding method for regulating water quality in aquaculture - Google Patents
Precise combined feeding method for regulating water quality in aquaculture Download PDFInfo
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- 238000009360 aquaculture Methods 0.000 title claims abstract description 35
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- 241000251468 Actinopterygii Species 0.000 claims abstract description 70
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Classifications
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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
Abstract
The invention relates to a precise combined feeding method for regulating water quality in aquaculture, and belongs to the technical field of the aquaculture. The precise combined feeding method for regulating the water quality in the aquaculture includes steps: using high and low protein feed in mixing mode during the whole aquaculture process, regulating a carbon-nitrogen ratio in the medium period of the aquaculture, and regulating the water quality in the later period of the aquaculture. By using the precise combined feeding method for regulating the water quality in the aquaculture, the water quality can be regulated well, bacilli and lactic acid bacteria in a water body become dominant bacteria, fishes can grow well and quickly by throwing the feed in the later period of the aquaculture, a culture cycle is shortened, yields and efficiency are increased, and a feed coefficient is reduced.
Description
Technical field
The present invention relates to a kind of feedstuff feeding method, more particularly, the present invention relates to the accurate combination feeding method of regulating water quality under Polyculture in a kind of aquaculture, belong to technical field of aquaculture.
Background technology
The important developing direction of culture fishery one is " raising together with ", and main Types has: multiple types fish is raised together with, Fish-shrimp mix-culture, fish soft-shelled turtle are raised together with, fish crab is raised together with.But, under Polyculture, new problem is proposed to feed formula, feed production and feedstuff feeding technology.
First be feed formula offering question.In a pond, there are the fish of Different Nutrition demand " are raised together with ", nutritious demand difference is very large fish and shrimp etc. " raising together with ", arrange at dietary nutritional standard and work out with feed formula, for the same pond under " raising together with " pattern, at least need two kinds, even two or more feeds just can satisfy the demand, like this, in same pond, throw something and feed two kinds or two or more feeds is just needed.Under fishes and shrimps, fish crab Polyculture, the particle size of fish feed, Shrimp waste feed, the requirement of water resisting time are widely different, also need to throw something and feed two or more pellets in a pond simultaneously.
At present, the feedstuff feeding under " raising together with " pattern needs feeding method and the technical regulation of formulating " feed set meal ".Namely need in a cultivating pool, throw something and feed two kinds or two or more feeds, it is exactly " feed set meal " feeding method that multiple feed combinations is thrown something and fed simultaneously.
Feed combinations set meal, comprises the combined set meal of same feed variable grain specification feed, and combined set meal two kinds of modes of variety classes feed.Two kinds or two or more feed combinations are thrown something and fed by the combined set meal of variety classes feed in a pond, such as, fish meal, shrimp feed or crab feed are combined, use of throwing something and feeding in same pond.
Two kinds or two or more feeds, in same pond, are thrown something and fed at different time, namely two kinds or two or more feeds are thrown something and fed according to time order and function order by the combined method of feedstuff feeding time.The combined method in feedstuff feeding place, adopts the feedstuff feeding machine of more than two or two, carries out two kinds or two or more feedstuff feedings respectively in different location, this kind of method for fishes and shrimps, that fish crab is raised together with is comparatively suitable.Consequently fish fish meal, Shrimp waste are ingested feed for shrimp and crab, ingest respectively in different places.
Existing feeding technology, mainly under Polyculture, first satisfied master breeds fish, the growth needs of famous and precious fish, and high protein feed of throwing something and feeding in a large number, makes it grow fast, Shortening culturing period, go on the market as early as possible, reaches the object of maximum economic benefit.But under such feeding and management condition, easily ignore the growth needs that other raise together with fish, cause cultivation later stage water body severe exacerbation, reason is: 1, bacillus level of growth when C/N ratio is 15 is best.2, lactic acid bacteria grows best when C/N ratio is 15.3 we be familiar with also being the vibrios of most headache be then C/N ratio be five even lower time growth best.In pond when C/N ratio is more close to ten, bacillus and the inhibition of lactic acid bacteria to vibrios stronger.If we adhere to that original mode of throwing something and feeding is constant, vibrios in water body can be caused to become dominant bacteria, and bacillus and lactobacter growth are suppressed, culture benefit can be reduced on the contrary, increase fish to have an attack of one's old illness risk, cause larger economic loss, cause the serious consequence lost more than gain.
It is CN103348936A that State Intellectual Property Office discloses a publication number in 2013.10.16, name is called the patent of invention of " a kind of cultural method of Squaliobarbus curriculus fingerling ", which disclose a kind of cultural method of Squaliobarbus curriculus fingerling, comprise the steps: that (1) manually sterilizes to fry rearing pond with quicklime, injected clear water after sterilization, and discharge fermentation fertilizer cultivation water quality, throw in Squaliobarbus curriculus fry, cultivate and adopt early stage soya bean slurry or artificial feed to feed Squaliobarbus curriculus fry, cultivate later stage employing artificial feed and feed Squaliobarbus curriculus fry, Squaliobarbus curriculus summer flower is obtained after cultivation, (2) with quicklime, manually sterilized in fry culturing pond, injected clear water after sterilization, and discharge fermentation fertilizer cultivation water quality, throw in Squaliobarbus curriculus summer flower, adopt artificial feed to raise Squaliobarbus curriculus summer flower, after Squaliobarbus curriculus summer flower enters pond, throw in freshwater shrimp seed and raise together with.This inventive method is by reasonably raising together with mode to the control and employing that cultivate fry breeding density, and adopt the artificial feed of high protein to feed, substantially increase disease-resistant rate and the survival rate of Squaliobarbus curriculus fingerling, and effectively raise quality and the survival rate of the fingerling of cultivation.
According to the side effect of existing throw something and feed methods and generation thereof, especially in the middle and later periods of cultivation, as rainy weather, harmful microorganism meeting amount reproduction, a large amount of organic matters such as residual bait, ight soil, biological corpse are decomposed at short notice, deamination, consume a large amount of dissolved oxygens, produce the harmful substances such as a large amount of hydrogen sulphide, ammonia nitrogen, murder by poisoning is caused to cultured fishes, thus fulminant disease causes mortality.
Summary of the invention
The present invention to be intended to solve in prior art feedstuff feeding method under aquaculture Polyculture can make bacillus and lactobacter growth in water body be suppressed, and easily produce harmful substance in water body, cultured fishes are caused to the problem of murder by poisoning, the accurate combination feeding method of regulating water quality under Polyculture in a kind of aquaculture is provided, bacillus and lactic acid bacteria in water body can be made to become dominant bacteria, and prevent the generation of harmful substance.
In order to realize foregoing invention object, its concrete technical scheme is as follows:
The accurate combination feeding method of regulating water quality under Polyculture in aquaculture, is characterized in that: described feeding method is at noon every day, and the often kind of feed will thrown something and fed in Polyculture all adopts following methods to throw something and feed:
A, the collocation of cultivation overall process height Low protein diet use
In the cultivation overall process of Polyculture, all kinds feed early stage high protein feed and later stage Low protein diet all mix and throw something and feed simultaneously, and early stage high protein feed and the weight ratio of later stage Low protein diet be 1:1-1:3;
Early stage of the present invention, high protein feed referred to the feed that protein that the feed that protein that juvenile fish uses period is higher, later stage Low protein diet refer to that adult fish uses period is lower.Above-mentioned feed refers to the feed of all kinds required in aquaculture, and these feeds are all the conventional feed of this area.According to the difference of cultivation kind, protein requirement differs greatly, those skilled in the art know the protein content in often kind of cultivation product high protein feed in early stage and later stage Low protein diet, and protein content in described early stage high protein feed is than the protein content height 1-2% of described later stage Low protein diet.
B, cultivation adjust C/N ratio mid-term
The cultivation mid-term of Polyculture, when namely starting to have cultivated 4-5 month, by early stage high-protein feed and the weight ratio of later stage low-protein feed be adjusted to 1:2-1:4; After keeping aforementioned proportion to throw something and feed one week, continue to throw something and feed according to the ratio of steps A;
C, cultivation later stage regulating water quality
In the cultivation later stage of Polyculture, namely before fish when 1-2 month, regulate water quality, after waiting quality recovery, the later stage Low protein diet 4 days of all throwing something and feeding, then continuing hockets according to the ratio of throwing something and feeding of steps A and step B throws something and feeds until fish.
Refer to the 13:00-14:00 of every day noon every day of the present invention.
The present invention in stepb, in described one week, adds sucrose by the 40-60% of feedstuff feeding amount and throws something and feeds every day.
The present invention, in step C, described carry out adjustment to water quality and refers to that stopping feed of throwing something and feeding once or is is only thrown something and fed later stage Low protein diet.
The present invention is in step C, and feedstuff feeding amount is 70% of normal feeding volume.
The present invention is in step C, and before quality recovery, the 40-60% pressing feedstuff feeding amount every day adds sucrose.
The present invention is in step C, the described ratio of throwing something and feeding according to steps A and step B hockets and throws something and feeds until after fish refers to and throw something and feed 5 days according to the ratio of throwing something and feeding of steps A, throw something and feed 6 days according to the ratio of throwing something and feeding of step B, then continuing hockets with this frequency throws something and feeds until fish again.
The Advantageous Effects that the present invention brings:
1, the invention solves in prior art feedstuff feeding method under aquaculture Polyculture can make bacillus and lactobacter growth in water body be suppressed, and easily produces harmful substance, cultured fishes are caused to the problem of murder by poisoning in water body.After adopting feeding method of the present invention, can be good at regulating water quality, in water body, bacillus and lactic acid bacteria become dominant bacteria, to throw something and feed down feed in the cultivation later stage, fish can be grown better faster, Shortening culturing period, increase production and improve productivity, reduce feed coefficient.
2, the present invention in step, and the weight ratio of high-protein feed and later stage low-protein feed is 1:1-1:3 in earlier stage.Arrange part by weight like this and can meet fish normal physiological needs, the proportion increase of later stage Low protein diet to reduce the waste of some unnecessary forage proteins, reduces the pollution of water body.
3, the present invention is in stepb, the cultivation mid-term of Polyculture, when namely starting to have cultivated 4-5 month, by early stage high-protein feed and the weight ratio of later stage low-protein feed be adjusted to 1:2-1:4.Such setting effectively can adjust the C/N ratio of water body, and in water body, bacillus and lactic acid bacteria become dominant bacteria, decreases the energy supply of vibrios, indirectly inhibits the growth of vibrios.
4, the methods combining of steps A of the present invention, step B and step C both ensure that the quick growth of fish, prevented again forage protein waste to pollute fish growth water environment unfavorable.Because front and back phase feed collocation uses the normal physiological needs that ensure that fish, if feed early-stage fodder (high protein feed) always, the adult fish phase can reduce the demand of forage protein, causes waste, increases feeding cost; The later stage feed (Low protein diet) if fed always, individual fish a little bit smaller a little, the nutrition of feed does not reach the demand of fish, and fish growth is slow, extends the culture-cycle, increases aquaculture cost.Front and back phase feed collocation uses, and especially the use of later stage feed reduces the content of albumen, means the content of the carbon heightened, and carbon-nitrogen ratio is increased, favourable to the growth such as bacillus and lactic acid bacteria, is conducive to the deterioration preventing water environment.
5, the present invention is preferred, refers to the 13:00-14:00 of every day noon every day.Within the above-mentioned specific time, adopt the present invention to throw something and feed, can more effectively regulate C/N ratio in breeding water body, make Water be in a lower level, be conducive to the beneficial bacteriums such as bacillus and breed fast and become dominant microflora.
6, the present invention is in step C, described carry out adjustment to water quality and refers to that stopping feed of throwing something and feeding once or is is only thrown something and fed later stage Low protein diet.The sugared source that sucrose provides is polysaccharide, directly can be utilized, be convenient to its Fast-propagation by the beneficial bacterium such as bacillus and lactic acid bacteria, become beneficial bacterium, and vibrios directly can not utilize, because it lacks the necessary material of growth, growth is suppressed, and effectively prevents the generation of harmful substance.The method of above-mentioned regulating water quality can directly regulate C/N ratio in water body, Water source continuous decrease, can reach the effect regulating C/N ratio in water body.
7, the present invention is preferred, and in step C, feedstuff feeding amount is 70% of normal feeding volume.The normal physiological requirements of fish can be ensured like this, and keep it to rob dyspepsia polarity, also can reduce the ratio of nitrogen, increase the ratio of carbon.
8, the present invention is preferred, in step B and step C, adds sucrose every day throw something and feed by the 40-60% of feedstuff feeding amount.The main purpose of sucrose is to provide the necessary carbon source of bacterium normal growth, and it directly can be utilized by the beneficial bacterium such as bacillus and lactic acid bacteria and vibrios can not utilize, and directly decreases the energy supply of vibrios, suppresses the growth of vibrios.
9, the present invention is in step C, the described ratio of throwing something and feeding according to steps A and step B hockets and throws something and feeds until after fish refers to and throw something and feed 5 days according to the ratio of throwing something and feeding of steps A, throw something and feed 6 days according to the ratio of throwing something and feeding of step B, then continuing hockets with this frequency throws something and feeds until fish again.The replacing of this frequency, had both ensured the normal physiological requirements of fish, and also namely growth rate is guaranteed, and has ensured again the rational Bacterial community of breeding water body.
Embodiment
embodiment 1
The accurate combination feeding method of regulating water quality under Polyculture in aquaculture, described feeding method is at noon every day, and the often kind of feed will thrown something and fed in Polyculture all adopts following methods to throw something and feed:
A, the collocation of cultivation overall process height Low protein diet use
In the cultivation overall process of Polyculture, all kinds feed early stage high protein feed and later stage Low protein diet all mix and throw something and feed simultaneously, and early stage high protein feed and the weight ratio of later stage Low protein diet be 1:1;
B, cultivation adjust C/N ratio mid-term
The cultivation mid-term of Polyculture, when namely starting to have cultivated 4 months, by early stage high-protein feed and the weight ratio of later stage low-protein feed be adjusted to 1:2; After keeping aforementioned proportion to throw something and feed one week, continue to throw something and feed according to the ratio of steps A;
C, cultivation later stage regulating water quality
In the cultivation later stage of Polyculture, namely during first 1 month of fish, regulate water quality, after waiting quality recovery, the later stage Low protein diet 4 days of all throwing something and feeding, then continuing hockets according to the ratio of throwing something and feeding of steps A and step B throws something and feeds until fish.
embodiment 2
The accurate combination feeding method of regulating water quality under Polyculture in aquaculture, described feeding method is at noon every day, and the often kind of feed will thrown something and fed in Polyculture all adopts following methods to throw something and feed:
A, the collocation of cultivation overall process height Low protein diet use
In the cultivation overall process of Polyculture, all kinds feed early stage high protein feed and later stage Low protein diet all mix and throw something and feed simultaneously, and early stage high protein feed and the weight ratio of later stage Low protein diet be 1:3;
B, cultivation adjust C/N ratio mid-term
The cultivation mid-term of Polyculture, when namely starting to have cultivated 5 months, by early stage high-protein feed and the weight ratio of later stage low-protein feed be adjusted to 1:4; After keeping aforementioned proportion to throw something and feed one week, continue to throw something and feed according to the ratio of steps A;
C, cultivation later stage regulating water quality
In the cultivation later stage of Polyculture, namely during first 2 months of fish, regulate water quality, after waiting quality recovery, the later stage Low protein diet 4 days of all throwing something and feeding, then continuing hockets according to the ratio of throwing something and feeding of steps A and step B throws something and feeds until fish.
embodiment 3
The accurate combination feeding method of regulating water quality under Polyculture in aquaculture, described feeding method is at noon every day, and the often kind of feed will thrown something and fed in Polyculture all adopts following methods to throw something and feed:
A, the collocation of cultivation overall process height Low protein diet use
In the cultivation overall process of Polyculture, all kinds feed early stage high protein feed and later stage Low protein diet all mix and throw something and feed simultaneously, and early stage high protein feed and the weight ratio of later stage Low protein diet be 1:2;
B, cultivation adjust C/N ratio mid-term
The cultivation mid-term of Polyculture, when namely starting to have cultivated 4.5 months, by early stage high-protein feed and the weight ratio of later stage low-protein feed be adjusted to 1:3; After keeping aforementioned proportion to throw something and feed one week, continue to throw something and feed according to the ratio of steps A;
C, cultivation later stage regulating water quality
In the cultivation later stage of Polyculture, namely during first 1.5 months of fish, regulate water quality, after waiting quality recovery, the later stage Low protein diet 4 days of all throwing something and feeding, then continuing hockets according to the ratio of throwing something and feeding of steps A and step B throws something and feeds until fish.
embodiment 4
The accurate combination feeding method of regulating water quality under Polyculture in aquaculture, described feeding method is at noon every day, and the often kind of feed will thrown something and fed in Polyculture all adopts following methods to throw something and feed:
A, the collocation of cultivation overall process height Low protein diet use
In the cultivation overall process of Polyculture, all kinds feed early stage high protein feed and later stage Low protein diet all mix and throw something and feed simultaneously, and early stage high protein feed and the weight ratio of later stage Low protein diet be 1:1.2;
B, cultivation adjust C/N ratio mid-term
The cultivation mid-term of Polyculture, when namely starting to have cultivated 4 months, by early stage high-protein feed and the weight ratio of later stage low-protein feed be adjusted to 1:3.8; After keeping aforementioned proportion to throw something and feed one week, continue to throw something and feed according to the ratio of steps A;
C, cultivation later stage regulating water quality
In the cultivation later stage of Polyculture, namely during first 2 months of fish, regulate water quality, after waiting quality recovery, the later stage Low protein diet 4 days of all throwing something and feeding, then continuing hockets according to the ratio of throwing something and feeding of steps A and step B throws something and feeds until fish.
embodiment 5
On the basis of embodiment 1-4, preferred:
The described 13:00 referring to every day noon every day.
In stepb, in described one week, add sucrose by 40% of feedstuff feeding amount every day and throw something and feed.
In step C, described adjustment is carried out to water quality refer to that stopping feed of throwing something and feeding once or is is only thrown something and fed later stage Low protein diet.
In step C, feedstuff feeding amount is 70% of normal feeding volume.
In step C, before quality recovery, press feedstuff feeding amount every day 40% adds sucrose.
In step C, the described ratio of throwing something and feeding according to steps A and step B hockets and throws something and feeds until after fish refers to and throw something and feed 5 days according to the ratio of throwing something and feeding of steps A, throw something and feed 6 days according to the ratio of throwing something and feeding of step B, then continuing hockets with this frequency throws something and feeds until fish again.
embodiment 6
On the basis of embodiment 1-4, preferred:
The described 14:00 referring to every day noon every day.
In stepb, in described one week, add sucrose by 60% of feedstuff feeding amount every day and throw something and feed.
In step C, described adjustment is carried out to water quality refer to that stopping feed of throwing something and feeding once or is is only thrown something and fed later stage Low protein diet.
In step C, feedstuff feeding amount is 70% of normal feeding volume.
In step C, before quality recovery, press feedstuff feeding amount every day 60% adds sucrose.
In step C, the described ratio of throwing something and feeding according to steps A and step B hockets and throws something and feeds until after fish refers to and throw something and feed 5 days according to the ratio of throwing something and feeding of steps A, throw something and feed 6 days according to the ratio of throwing something and feeding of step B, then continuing hockets with this frequency throws something and feeds until fish again.
embodiment 7
On the basis of embodiment 1-4, preferred:
The described 13:30 referring to every day noon every day.
In stepb, in described one week, add sucrose by 50% of feedstuff feeding amount every day and throw something and feed.
In step C, described adjustment is carried out to water quality refer to that stopping feed of throwing something and feeding once or is is only thrown something and fed later stage Low protein diet.
In step C, feedstuff feeding amount is 70% of normal feeding volume.
In step C, before quality recovery, press feedstuff feeding amount every day 50% adds sucrose.
In step C, the described ratio of throwing something and feeding according to steps A and step B hockets and throws something and feeds until after fish refers to and throw something and feed 5 days according to the ratio of throwing something and feeding of steps A, throw something and feed 6 days according to the ratio of throwing something and feeding of step B, then continuing hockets with this frequency throws something and feeds until fish again.
embodiment 8
On the basis of embodiment 1-4, preferred:
The described 13:50 referring to every day noon every day.
In stepb, in described one week, add sucrose by 42% of feedstuff feeding amount every day and throw something and feed.
In step C, described adjustment is carried out to water quality refer to that stopping feed of throwing something and feeding once or is is only thrown something and fed later stage Low protein diet.
In step C, feedstuff feeding amount is 70% of normal feeding volume.
In step C, before quality recovery, press feedstuff feeding amount every day 55% adds sucrose.
In step C, the described ratio of throwing something and feeding according to steps A and step B hockets and throws something and feeds until after fish refers to and throw something and feed 5 days according to the ratio of throwing something and feeding of steps A, throw something and feed 6 days according to the ratio of throwing something and feeding of step B, then continuing hockets with this frequency throws something and feeds until fish again.
embodiment 9
The accurate combination feeding method of regulating water quality under Polyculture in a kind of aquaculture:
For multiple types fish is raised together with in Polyculture, raise together with kind and comprise: grass carp, crucian raise together with or carp, crucian are raised together with, each cultured product all will be thrown something and fed its corresponding all feeds, and the dietary protein level of often kind of cultured product is as follows:
1, grass carp and crucian are raised together with: early stage, the protein content of high protein feed was 28-30%; The protein content of later stage Low protein diet is 27-29%;
2, carp and crucian are raised together with: early stage, the protein content of high protein feed was 31-33%; The protein content of later stage Low protein diet is 29-31%.
Described feeding method is at noon every day, and the often kind of feed will thrown something and fed in Polyculture all adopts following methods to throw something and feed:
A, the collocation of cultivation overall process height Low protein diet use
In the cultivation overall process of Polyculture, all kinds feed early stage high protein feed and later stage Low protein diet all mix and throw something and feed simultaneously, and early stage high protein feed and the weight ratio of later stage Low protein diet be 1:1-1:3;
B, cultivation adjust C/N ratio mid-term
The cultivation mid-term of Polyculture, when namely starting to have cultivated 4-5 month, by early stage high-protein feed and the weight ratio of later stage low-protein feed be adjusted to 1:2-1:4; After keeping aforementioned proportion to throw something and feed one week, continue to throw something and feed according to the ratio of steps A;
C, cultivation later stage regulating water quality
In the cultivation later stage of Polyculture, namely before fish when 1-2 month, regulate water quality, after waiting quality recovery, the later stage Low protein diet 4 days of all throwing something and feeding, then continuing hockets according to the ratio of throwing something and feeding of steps A and step B throws something and feeds until fish.
Adopt this kind of feeding method than not adopting this kind of method to have obvious difference on culture efficiency, after adopting the method, feed coefficient reduces 0.1 than what do not adopt, and the throwing in cultivation later stage raises rate than not adopting method to add 0.2.Shorten the culture-cycle like this, increase production and improve productivity, reduce feed coefficient, the reduction of aquaculture cost.For raiser brings direct economic benefit.
embodiment 10
The accurate combination feeding method of regulating water quality under Polyculture in a kind of aquaculture:
Be Fish-shrimp mix-culture in Polyculture, raise together with kind and comprise: Penaeus Vannmei, Colossoma brachypomum are raised together with or Penaeus Vannmei, mullet are raised together with, each cultured product all will be thrown something and fed its corresponding all feeds, and the dietary protein level of often kind of cultured product is as follows:
1, Penaeus Vannmei, Colossoma brachypomum are raised together with: early stage, the protein content of high protein feed was 36-38%; The protein content of later stage Low protein diet is 34-36%;
2, Penaeus Vannmei, mullet are raised together with: early stage, the protein content of high protein feed was 36-38%; The protein content of later stage Low protein diet is 34-36%.
Described feeding method is at noon every day, and the often kind of feed will thrown something and fed in Polyculture all adopts following methods to throw something and feed:
A, the collocation of cultivation overall process height Low protein diet use
In the cultivation overall process of Polyculture, all kinds feed early stage high protein feed and later stage Low protein diet all mix and throw something and feed simultaneously, and early stage high protein feed and the weight ratio of later stage Low protein diet be 1:1-1:3;
B, cultivation adjust C/N ratio mid-term
The cultivation mid-term of Polyculture, when namely starting to have cultivated 4-5 month, by early stage high-protein feed and the weight ratio of later stage low-protein feed be adjusted to 1:2-1:4; After keeping aforementioned proportion to throw something and feed one week, continue to throw something and feed according to the ratio of steps A;
C, cultivation later stage regulating water quality
In the cultivation later stage of Polyculture, namely before fish when 1-2 month, regulate water quality, after waiting quality recovery, the later stage Low protein diet 4 days of all throwing something and feeding, then continuing hockets according to the ratio of throwing something and feeding of steps A and step B throws something and feeds until fish.
Adopt this kind of feeding method than not adopting this kind of method to have obvious difference on culture efficiency, after adopting the method, breeding water body transparency is than the 5cm that adds do not adopted, the beneficial bacterium amount reproductions such as surface breeding water body colony balance bacillus, not there is disease in culturing fish and shrimp, reduce drug cost 50 yuan/mu, for raiser brings direct economic benefit.
embodiment 11
The accurate combination feeding method of regulating water quality under Polyculture in a kind of aquaculture:
For fish soft-shelled turtle is raised together with in Polyculture, raise together with kind and comprise: grass carp, soft-shelled turtle raise together with or silver carp, soft-shelled turtle are raised together with, each cultured product all will be thrown something and fed its corresponding all feeds, and the dietary protein level of often kind of cultured product is as follows:
1, grass carp, soft-shelled turtle are raised together with: early stage, the protein content of high protein feed was 45-47%; The protein content of later stage Low protein diet is 43-45%;
2, silver carp, soft-shelled turtle are raised together with: early stage, the protein content of high protein feed was 45-47%; The protein content of later stage Low protein diet is 43-44%;
Described feeding method is at noon every day, and the often kind of feed will thrown something and fed in Polyculture all adopts following methods to throw something and feed:
A, the collocation of cultivation overall process height Low protein diet use
In the cultivation overall process of Polyculture, all kinds feed early stage high protein feed and later stage Low protein diet all mix and throw something and feed simultaneously, and early stage high protein feed and the weight ratio of later stage Low protein diet be 1:1-1:3;
B, cultivation adjust C/N ratio mid-term
The cultivation mid-term of Polyculture, when namely starting to have cultivated 4-5 month, by early stage high-protein feed and the weight ratio of later stage low-protein feed be adjusted to 1:2-1:4; After keeping aforementioned proportion to throw something and feed one week, continue to throw something and feed according to the ratio of steps A;
C, cultivation later stage regulating water quality
In the cultivation later stage of Polyculture, namely before fish when 1-2 month, regulate water quality, after waiting quality recovery, the later stage Low protein diet 4 days of all throwing something and feeding, then continuing hockets according to the ratio of throwing something and feeding of steps A and step B throws something and feeds until fish.
Adopt this kind of feeding method than not adopting this kind of method to have obvious difference on culture efficiency, after adopting the method, feed coefficient reduces 0.12 than what do not adopt, shorten the culture-cycle like this, increase production and improve productivity, reduce feed coefficient, feed Low protein diet, feed per ton can save 100 yuan, the reduction of aquaculture cost.For raiser brings direct economic benefit.
embodiment 12
The accurate combination feeding method of regulating water quality under Polyculture in a kind of aquaculture:
For fish crab is raised together with in Polyculture, raise together with kind and comprise: grass carp, crab raise together with or crucian, crab are raised together with, each cultured product all will be thrown something and fed its corresponding all feeds, and the dietary protein level of often kind of cultured product is as follows:
1, grass carp, crab are raised together with: early stage, the protein content of high protein feed was 28-30%; The protein content of later stage Low protein diet is 27-29%;
2, crucian, crab are raised together with: early stage, the protein content of high protein feed was 31-33%; The protein content of later stage Low protein diet is 29-31%;
Described feeding method is at noon every day, and the often kind of feed will thrown something and fed in Polyculture all adopts following methods to throw something and feed:
A, the collocation of cultivation overall process height Low protein diet use
In the cultivation overall process of Polyculture, all kinds feed early stage high protein feed and later stage Low protein diet all mix and throw something and feed simultaneously, and early stage high protein feed and the weight ratio of later stage Low protein diet be 1:1-1:3;
B, cultivation adjust C/N ratio mid-term
The cultivation mid-term of Polyculture, when namely starting to have cultivated 4-5 month, by early stage high-protein feed and the weight ratio of later stage low-protein feed be adjusted to 1:2-1:4; After keeping aforementioned proportion to throw something and feed one week, continue to throw something and feed according to the ratio of steps A;
C, cultivation later stage regulating water quality
In the cultivation later stage of Polyculture, namely before fish when 1-2 month, regulate water quality, after waiting quality recovery, the later stage Low protein diet 4 days of all throwing something and feeding, then continuing hockets according to the ratio of throwing something and feeding of steps A and step B throws something and feeds until fish.
Adopt this kind of feeding method than not adopting this kind of method to have obvious difference on culture efficiency, after adopting the method, feed coefficient reduces 0.1 than what do not adopt, measure breeding water body Bacterial community known, the bacillus after employing the method in water body and lactic acid bacteria are 2 times that do not adopt the method.Adopt this method can save feed cost and drug cost for raiser, bring good economic benefit.
Claims (7)
1. the accurate combination feeding method of regulating water quality under Polyculture in aquaculture, is characterized in that: described feeding method is at noon every day, and the often kind of feed will thrown something and fed in Polyculture all adopts following methods to throw something and feed:
A, the collocation of cultivation overall process height Low protein diet use
In the cultivation overall process of Polyculture, all kinds feed early stage high protein feed and later stage Low protein diet all mix and throw something and feed simultaneously, and early stage high protein feed and the weight ratio of later stage Low protein diet be 1:1-1:3;
B, cultivation adjust C/N ratio mid-term
The cultivation mid-term of Polyculture, when namely starting to have cultivated 4-5 month, by early stage high-protein feed and the weight ratio of later stage low-protein feed be adjusted to 1:2-1:4; After keeping aforementioned proportion to throw something and feed one week, continue to throw something and feed according to the ratio of steps A;
C, cultivation later stage regulating water quality
In the cultivation later stage of Polyculture, namely before fish when 1-2 month, regulate water quality, after waiting quality recovery, the later stage Low protein diet 4 days of all throwing something and feeding, then continuing hockets with this frequency throws something and feeds until fish.
2. the accurate combination feeding method of regulating water quality under Polyculture in a kind of aquaculture according to claim 1, is characterized in that: the described 13:00-14:00 referring to every day noon every day.
3. the accurate combination feeding method of regulating water quality under Polyculture in a kind of aquaculture according to claim 1, is characterized in that: in stepb, in described one week, adds sucrose every day throw something and feed by the 40-60% of feedstuff feeding amount.
4. the accurate combination feeding method of regulating water quality under Polyculture in a kind of aquaculture according to claim 1, it is characterized in that: in step C, described adjustment is carried out to water quality refer to that stopping feed of throwing something and feeding once or is is only thrown something and fed later stage Low protein diet.
5. the accurate combination feeding method of regulating water quality under Polyculture in a kind of aquaculture according to claim 1, it is characterized in that: in step C, feedstuff feeding amount is 70% of normal feeding volume.
6. the accurate combination feeding method of regulating water quality under Polyculture in a kind of aquaculture according to claim 1, it is characterized in that: in step C, before quality recovery, the 40-60% pressing feedstuff feeding amount every day adds sucrose.
7. the accurate combination feeding method of regulating water quality under Polyculture in a kind of aquaculture according to claim 1, it is characterized in that: in step C, the described ratio of throwing something and feeding according to steps A and step B hockets and throws something and feeds until after fish refers to and throw something and feed 5 days according to the ratio of throwing something and feeding of steps A, throw something and feed 6 days according to the ratio of throwing something and feeding of step B, then continuing hockets with this frequency throws something and feeds until fish again.
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