30 results about "Plagiognathops microlepis" patented technology

The invention discloses a freshwater lake ecological alga control method which comprises the following steps: (1) setting up a net fencing region; (2) setting up an isolation region, wherein emergent aquatic plants are transplanted in the isolation region and the transplanting density is 4 to 6 plants per square meter; (3) putting in filter feeding fishes, wherein the ratio of the filter feeding fishes to omnivorous fishes is 2:1. The method disclosed by the invention is simple and easy to operate, has strong maneuverability, has no secondary pollution and prevents algal bloom by mixed culture of the filter feeding and omnivorous fishes; fragments, alga, zooplankter and the like in each layer of a water body are caught; alga content is reduced; the water body environment is more completely purified; the emergent aquatic plants are convenient to adsorb N and P and reduce the eutrophication degree of the water body; in addition, xenocypris davidi bleeker and plagiognathops microlepis are naturally bred without being put in every year, density control is implemented in a harvesting manner of catching big fishes and leaving small fishes in the later period, the operation cost is reduced, and caught fishes also can bring certain additional economic benefits.

The invention discloses a special feed for a juvenile fish of plagiognathops microlepis. The special feed comprises the following components in parts by weight: 30-40 parts of hornwort, 30-40 parts of najas marina, 20-30 parts of soybean meal, 1-5 parts of camphorwood leaf, 4-6 parts of poplar leaf, 1-5 parts of chinaberry seed, 2-6 parts of masson pine needle, 1-3 parts of duckweed, 1-3 parts of salvinia natans, 15-20 parts of silkworm chrysalis meal, and 15-20 parts of pig blood power. The aquatic plants are used as main feed materials, the resources are rich, the secondary fermentation improves the contents of crude vegetable protein and crude fat to meet the nutrition demands; the soybean meal improves the tastiness while improving the nutritive components; camphorwood leaves, poplar leaves and the chinaberry seed can prevent and cure trichodiniasis; the masson pine needle can prevent and cure argulus; the duckweed and the salvinia natans can prevent and cure lernaea. The feed is high in stability in water, the survival rate is up to more than 95% and the growth rate of body mass are also up to more than 165.7 when the feed provided by the invention is used for feeding the fish, the feed coefficient is reduced, and the feed conversion rate is improved.

The invention discloses a plagiognathops microlepis fish and sturgeon intercropping method, which comprises the following steps of firstly performing disinfection treatment on a cement culture pond and waiting for releasing plagiognathops microlepis fish fry after disinfection; during the period after the plagiognathops microlepis fish fry is released before sturgeon fish fry is released, not feeding feedstuff to the plagiognathops microlepis fish fry, and partitioning the periphery of a food platform by using meshes about five days before the sturgeon fish fry is bred; releasing the sturgeon fish fry and breeding the sturgeon fish fry in a greenhouse; transferring the sturgeon fish fry bred in the greenhouse to deepwater net cages in a reservoir for marketable fish breeding; and finally scientifically breeding the sturgeon fish fry until marketable sturgeon comes into the market. According to the method, a single greenhouse perennial drainage breeding method is combined with a deepwater net cage breeding method in the reservoir, and a breeding mode of intercropping plagiognathops microlepis fish is adopted, so that the purpose that residual feeds, excrement of sturgeon and lichen generated in a pond are eliminated is achieved, so as to reduce the cost of marketable sturgeon breeding and the waste of environment and resources.

The invention discloses a farming method for a squaliobarbus curriculus adult fish, which comprises the following steps: 1, performing manual disinfecting for a farming pool by quicklime before the squaliobarbus curriculus fingerlings are put into the pool, freezing and drying the farming pool, pouring water into the farming pool, and applying fermentation organic fertilizer to cultivate water quality; and 2, putting the squaliobarbus curriculus fingerlings into the farming pool, feeding artificial diet, and then putting freshwater shrimps and plagiognathops microlepis fingerlings into the farming pool to be mixed with the squaliobarbus curriculus fingerlings. According to the method, due to the adoption of the method, not only is the cultured adult fish large in size and high in standard, but also the adult fish survival rate is high and the acre yield is high; with suitable breeds for mixing with the squaliobarbus curriculus fingerlings and the reasonable artificial diet, the disease-resistant rate and survival rate of the squaliobarbus curriculus adult fish are improved, and accordingly, the standard and weight of the adult fish are effectively improved, and the acre yield is also improved.

The invention relates to a method for increasing breeding yield and benefit of pond mainly for breeding grass carps. The method includes that the grass carps are bred mainly, silver Prussian carps, megalobrama amblycephala, silver carps and bighead carps and plagiognathops microlepis are bred secondarily, and only the grass carps need to be fed during feeding. Different fishes are complementary in eating habit and low in competitive eating relation and are positioned in different ecological niche spaces, so that water body space is utilized fully. Fingerlings of a same variety and different in specification are bred in a same pond, large-specification fingerlings can be fished out for selling after reaching commercial specifications through feeding for a period of time, and some small-specification fingerlings (summerlings) are supplemented at the same time, so that rotation of fishing and releasing is realized; after a breeding period is finished, the fingerlings supplemented in the middle of breeding can serve as fingerlings of commercial fishes of the next year, so that relay-type breeding is formed. Vaccines are injected to the grass carps to prevent diseases, so that survival rate is up to higher than 95%, consumption of fishery medicine is reduced, and safety is guaranteed. By feeding green grass, feed cost is lowered greatly, and feed cost is saved by 30-40%; fish meat quality is better.

The invention discloses a substrate ecological crucian pond culturing method and relates to the technical field of aquatic product culture. The method comprises the following steps of building a substrate ecological crucian pond culturing system, breeding crucian, managing culturing and catching fish products, wherein the first step comprises substeps of pond preparation, substrate set, pond interc-breeding group formation. Compared with a traditional culturing mode, life habits of cultured fishes are employed and substrate is arranged in the pond to build substrate ecological crucian pond culturing method; a problem of water quality degradation due to high density of culture can be effectively controlled, so crucian can be less attacked by diseases; inter-breeding fish substrate foods can be provided by the substrate, so cost is reduced; benefits can be increased for inter-breeding fish products; greener and healthier ecological breeding model can be achieved; and high quality of crucian and Plagiognathops microlepis can be realized.

The invention discloses a method for cooperatively controlling microcystis aeruginosa and purifying water quality by using Plagiognathops microlepis, hyriopsis cumingii, Bellamya aeruginosa and calamus, and belongs to the technical field of water quality purification. The method comprises the following implementation steps: 1, selecting a specific eutrophication water area; 2, putting the hyriopsis cumingii into a net bag of a continuous ecological floating bed; and 3, throwing the Plagiognathops microlepis and the Bellamya aeruginosa into the water respectively. The method is simple and practical, can control the microcystis aeruginosa on upper, middle and lower layers of the water and microcystis aeruginosa hypopus in bottom mud and achieves an effect of purifying the water quality; various types of organisms are added, so the biological diversity of the water is improved and balance of a water ecological system is promoted; the hyriopsis cumingii, the Bellamya aeruginosa and the Plagiognathops microlepis are caught, so a certain economic value is achieved; and the calamus can be harvested at fixed period and can be used for feeding animals or serve as paper-making raw materials, so secondary pollution is avoided.

The invention discloses a comprehensive maintaining method for submerged plants. The comprehensive maintaining method comprises the following steps that firstly, a flocculating agent is added into a water body with the quantity of 1-20 mg / l to reduce the turbidity of the water body; secondly, according to the specific circumstance of dirt attached to the submerged plants, a disinfecting agent or organic acid or pesticide or algicide or surfactant or a substrate modifying agent or a microbial agent or microorganism growth promoting liquid is added into the water body with the amount of 0.1-1 mg / l, and flow disturbance is artificially made; thirdly, a nutrition regulator or a heavy metal complex is applied in the growing stage of the submerged plants with the quantity of 0.2-1 mg / l; fourthly, plagiognathops microlepis or barbels are introduced into the water body with the quantity of 50-100 pieces per 666.7 m<2> to eat fixation algae, and chub or bighead carp are introduced with the quantity of 10-30 g / m<3> to eat planktonic single-spore algae. By means of the comprehensive treatment method, the ecology of the water body is balanced, the transparency of the water body is quickly increased so as to promote the growth of aquatic plants in the water body, dirt attached to the stems and leaves of the aquatic plants is quickly removed, and finally the purpose of long-acting cleaning of the stems and leaves of the aquatic plants and the effect of enhancing water ecological restoration are achieved.