A kind of organic grass carp segmentation cultural method
Technical field
The present invention relates to technical field of aquaculture, be specifically related to a kind of organic grass carp segmentation cultural method.
Background technology
The grass carp cultivation generally is divided into fry rearing, nurture of fish fingerlings, adult fish culture three phases, this three phases is generally finished in the pond in the tradition cultivation, the grass carp fish body of cultivation is big bag shape, build tubbiness, meat is loose, mud fishy smell heavy, can not satisfy the consumer to requirement ecological, the healthy water product.
Summary of the invention
For overcoming defects, the present invention has designed a kind of organic grass carp segmentation cultural method.
Technical scheme of the present invention is that a kind of organic grass carp segmentation cultural method is characterized in that: organic grass carp is adopted pond rearing in the fry rearing stage; In the nurture of fish fingerlings stage, adopt raising in cage; In organic adult fish culture stage, utilize the lake net to enclose the Implement Ecological cultivation.
The present invention is adapted at being on the verge of the cultivation base in lake and carries out, require cultivation base and periphery without any pollution source, possesses the essential condition of producing organic food, all contaminants comprises that three industrial wastes, agricultural wastes, house refuse etc. all can not exist in culture zone and surrounding enviroment, there are standardization organic fry rearing pond and perfect row's flood pattern in the culture zone.
Net cage is uncovered rectangle net cage, specification: long 5-8 rice, wide 3-6 rice, high 1.5-2.3 rice, mesh divide 1 centimetre, 2 centimetres two kinds of specifications, and take bamboo pole, timber as framework, the lake net that net cage is arranged on without any pollutant encloses near the district.
Net encloses the district near near the arm of lake place, lake the fry and fingerling rearing district, and net encloses that the district requires that water quality is pure and fresh, pollution-free, the zone of water transparency 30-40 centimetre, and substrate is harder silt substrate, pasture and water coverage rate 60%, require leeward on the sunny side, have miniflow water, net to enclose Double-level Reticulated must be set, intranet and extranet enclose 10 meters at interval, 2 centimetres of internal layer meshes, 3 centimetres of outer meshes, 1.5-2.5 meters of the depth of waters, purse seine exceeds 1 meter of the water surface and " 7 " type folding net inwardly is set, and 0.5 meter on folding net prevents the fish flight.
Phase I, pond rearing fry: the fry rearing pond that utilizes lakeside, cultivate the grass carp seedling, routinely pond disinfection, buying are had the grass carp seedling that organic fry technical regulation is produced that meets that the fish breeding field of production qualification produces, put 200,000 tails in a suitable place to breed for every mu, the mode of take to splash soya-bean milk, micro-granulated feed is thrown something and fed, added water once in per 5 days, each 10-20 centimetres, used a microorganism formulation every 7 days, each every cubic metre of water body uses 1 gram; By 20-25 days cultivation, put the young minute pool of grass carp crow in a suitable place to breed the crow young pond of cultivating, young 5-6 ten thousand tails of crow are put in young every mu in the pond of cultivating of crow in a suitable place to breed, cultivate after 1.5-2 months, and when the grass carp kind was grown to 50 tail per jin, sieving changed fingerling over to raising in cage.
Second stage, raising in cage fingerling: during the raising in cage fingerling, in the net cage of 1 centimetre of mesh, cultivate first, 3-5 jin of the grass carp kinds that every square metre of stocking size is 40-50 tail per jin, adopting protein content is 35% the grains dedicated feed of grass carp kind, fingerling is tamed throw something and feed, throw something and feed every day 4 times, day feeding volume is the 5%-8% that deposits net cage fingerling body weight, guarantees ingesting of fingerling, and it is 2 liang silver carp bighead 100 tails that the net cage inner sleeve is supported specification; Long during to 10 tail per jin when Grass Carp Juveniles, change mesh over to and be 2 centimetres net cage, put 7-10 jin in a suitable place to breed for every square metre, adopting protein content is that 32% grass carp kind pellet is thrown something and fed, throw something and feed 4-5 every day, and a day feeding volume is the 4%-6% that deposits net cage fingerling body weight, guarantees that fully fingerling ingests; Prepare enough the sodium peroxide oxygenation agent between feeding period, guarantee not anoxic of net cage water body, make regular check on net cage, clean etting, guarantee the inside and outside water body exchange of net cage, the foster specification of net cage inner sleeve is half jin silver carp bighead 50-70 tail, prevents net cage district water quality overfertilization; The lime water of splashing per month during the raising in cage one time; Putting into net when fingerling length to 250 restrains encloses the district and carries out organic adult fish culture.
Phase III, net encloses the organic adult fish culture in district: before the fingerling stocking, net encloses the district and has cultivated pasture and water, and removes wild fish, and the grass carp stocking rate is every mu of 150-200 tail, put simultaneously every mu of 60 tails of silver carp of same specification in a suitable place to breed, every mu of 30 tails of bighead, every mu of 10 tails of 10 centimetres of mandarin fishes, the perennial ryegrass of throwing something and feeding is suitably replenished pellet, the day feeding volume of pellet is the 1%-2% of fish body weight, forage grass is as the criterion to eat up the same day, does not leave forage grass and spends the night in the waters, throws something and feeds every day three times, at 9 o'clock in the morning forage grass of throwing something and feeding, at 12 o'clock at noon the pellet of throwing something and feeding, the forage grass of throwing something and feeding again before at 4 o'clock in afternoon one time is removed the surplus slag of residual bait every day, make regular check on purse seine and prevent breakage, reinforcing network encloses before the strong wind and heavy rain; Fish growth encloses the lime water of splashing a time along net season per month, carries out disinfection, and pre-disease prevention occurs, net encloses the district in the Growth of Grass Carps Ctenopharyngodon Idellus stage, the microorganism formulation of splashing per month a time, each 1 kilogram every mu, through the cultivation in 2 years, the long harvesting listing to more than 6 jin time of organic grass carp.
Beneficial effect: the grass carp of adopting organic grass carp segmentation cultural method cultivation, adult fish physique is healthy and strong, build is good, meat is compact, nutritious, can satisfy people to ecological, the healthy requirement of organic grass carp, and pollutant emission is few during the cultivation, little to environmental influence, meet the ecological fishery demand for development.
Embodiment
For further illustrating the present invention, be explained below in conjunction with specific embodiment.
Technical scheme of the present invention is that a kind of organic grass carp segmentation cultural method is characterized in that: organic grass carp is adopted pond rearing in the fry rearing stage; In the nurture of fish fingerlings stage, adopt raising in cage; In organic adult fish culture stage, utilize the lake net to enclose the Implement Ecological cultivation.
The present invention is adapted at being on the verge of the cultivation base in lake and carries out, require cultivation base and periphery without any pollution source, possesses the essential condition of producing organic food, all contaminants comprises that three industrial wastes, agricultural wastes, house refuse etc. all can not exist in culture zone and surrounding enviroment, there are standardization organic fry rearing pond and perfect row's flood pattern in the culture zone.
Net cage is uncovered rectangle net cage, specification is divided two kinds: use long 5 meters, wide 3 meters, high 1.5 meters of net cage early stage, mesh divides 1 centimetre, later stage to use long 8 meters, wide 6 meters, high 2.3 meters of net cage, 2 centimetres of two kinds of specifications, take bamboo pole, timber as framework, the lake net that net cage is arranged on without any pollutant encloses near the district.
Net encloses the district near near the arm of lake place, lake the fry and fingerling rearing district, and net encloses that the district requires that water quality is pure and fresh, pollution-free, the zone of 35 centimetres of water transparencies, and substrate is harder silt substrate, pasture and water coverage rate 60%, require leeward on the sunny side, have miniflow water, net to enclose Double-level Reticulated must be set, intranet and extranet enclose 10 meters at interval, 2 centimetres of internal layer meshes, 3 centimetres of outer meshes, 2.0 meters of the depth of waters, purse seine exceeds 1 meter of the water surface and " 7 " type folding net inwardly is set, 0.5 meter on folding net prevents the fish flight.
Phase I, pond rearing fry: the fry rearing pond that utilizes lakeside, cultivate the grass carp seedling, routinely pond disinfection, buying are had the grass carp seedling that organic fry technical regulation is produced that meets that the fish breeding field of production qualification produces, put 200,000 tails in a suitable place to breed for every mu, the mode of take to splash soya-bean milk, micro-granulated feed is thrown something and fed, added water once in per 5 days, each 10 centimetres, used a microorganism formulation every 7 days, each every cubic metre of water body uses 1 gram; By 20 days cultivation, put the young minute pool of grass carp crow in a suitable place to breed the crow young pond of cultivating, young 60,000 tails of crow are put in young every mu in the pond of cultivating of crow in a suitable place to breed, cultivate after 2 months, and when the grass carp kind was grown to 50 tail per jin, sieving changed fingerling over to raising in cage.
Second stage, raising in cage fingerling: during the raising in cage fingerling, in the net cage of 1 centimetre of mesh, cultivate first, 5 jin of the grass carp kinds that every square metre of stocking size is 40 tails per jin, adopting protein content is 35% the grains dedicated feed of grass carp kind, fingerling is tamed throw something and feed, throw something and feed every day 4 times, day feeding volume is to deposit 6% of net cage fingerling body weight, guarantees ingesting of fingerling, and it is 2 liang silver carp bighead 100 tails that the net cage inner sleeve is supported specification; Long during to 10 tail per jin when Grass Carp Juveniles, change mesh over to and be 2 centimetres net cage, put 7 jin in a suitable place to breed for every square metre, adopting protein content is that 32% grass carp kind pellet is thrown something and fed, throw something and feed every day 5 times, a day feeding volume is to deposit 5% of net cage fingerling body weight, guarantees that fully fingerling ingests; Prepare enough the sodium peroxide oxygenation agent between feeding period, guarantee not anoxic of net cage water body, make regular check on net cage, clean etting, guarantee the inside and outside water body exchange of net cage, the foster specification of net cage inner sleeve is half jin silver carp bighead 50 tails, prevents net cage district water quality overfertilization; The lime water of splashing per month during the raising in cage one time; Putting into net when fingerling length to 250 restrains encloses the district and carries out organic adult fish culture.
Phase III, net encloses the organic adult fish culture in district: before the fingerling stocking, net encloses the district and has cultivated pasture and water, and removes wild fish, and the grass carp stocking rate is every mu of 150 tails, put simultaneously every mu of 60 tails of silver carp of same specification in a suitable place to breed, every mu of 30 tails of bighead, every mu of 10 tails of 10 centimetres of mandarin fishes, the perennial ryegrass of throwing something and feeding is suitably replenished pellet, the day feeding volume of pellet is 2% of fish body weight, forage grass is as the criterion to eat up the same day, does not leave forage grass and spends the night in the waters, throws something and feeds every day three times, at 9 o'clock in the morning forage grass of throwing something and feeding, at 12 o'clock at noon the pellet of throwing something and feeding, the forage grass of throwing something and feeding again before at 4 o'clock in afternoon one time is removed the surplus slag of residual bait every day, make regular check on purse seine and prevent breakage, reinforcing network encloses before the strong wind and heavy rain; Fish growth encloses the lime water of splashing a time along net season per month, carries out disinfection, and pre-disease prevention occurs, net encloses the district in the Growth of Grass Carps Ctenopharyngodon Idellus stage, the microorganism formulation of splashing per month a time, each 1 kilogram every mu, through the cultivation in 2 years, the long harvesting listing to more than 6 jin time of organic grass carp.