459 results about "Oyster" patented technology

The present invention relates to the field of marine buoys, and in particular to a marine environment monitoring buoy platform, comprising a buoy body, a marine monitor arranged above the buoy body, and an ecological monitor arranged below the buoy body, a submersible assembly is arranged at the bottom of the buoy body, and the submersible assembly comprises a fixed box, a driving motor is fixedly arranged in the center of the inner cavity of the fixed box, and multiple groups of reel shafts are evenly arranged outside the driving motor, and the upper and lower ends of the reel shaft are rotatably matched with the fixed box, and the output end of the driving motor is provided with a driving gear, and a transmission gear is fixedly sleeved on the reel shaft, and the driving gear is meshed with the transmission gear, and a lowering rope is wound on the reel shaft, and one end of the lowering rope passes through the fixed box and is fixedly connected with a protective assembly. The present invention can achieve a fully surrounded and covered scouring effect on the outer wall of the ecological monitor, thereby effectively preventing marine organisms such as barnacles and oysters from parasitizing on the ecological monitor, which is beneficial to the monitoring process.

The inventive technique process of grainy calcium material for preventing and treating peanut blight primarily includes: adopting the shell powder and weathered coal as raw materials, machining into peanut blight prevention material through agglomeration granulation. The invention has innovative and reasonable design, which not only has simple process, easy implementing, but also has low cost of raw materials, product application convenience, remarkable peanut blight prevention effect, and capability of promoting high-efficient production pf peanut. In particular, the invention applies coastal oyster shell wastes for machining calcium materials for preventing and treating peanut blight, which not only reduces environmental pollution, but also promotes recycling of resources, has very significant economic, social and ecological benefits and greater promotional value.

The invention relates to an oyster culture carbon popularity method, which is specifically applied to the field of mariculture, and aims to realize quantification and management of carbon popularity value by accurately calculating and predicting carbon fixed quantity in an oyster culture process, and obviously improve the accuracy of oyster growth prediction by adopting an improved Gompertz model and an LSTM neural network. Compared with a traditional method, the growth prediction error of the method is reduced by about 30%. Multi-dimensional environmental parameter monitoring and analysis including water temperature, salinity, pH value, dissolved oxygen and the like are introduced, and the influence of environmental factors on oyster growth is comprehensively evaluated. Therefore, the cultivation management is more accurate, and the survival rate and the growth speed of oysters are improved. Accurate calculation of the carbon fixation efficiency in different growth stages is realized through a dynamic stage model; experimental data show that the carbon fixing amount measured and calculated by the method is 20-30% higher than that measured and calculated by a traditional method; based on real-time data and a prediction model, the system can dynamically adjust a breeding strategy.

The invention relates to an oyster breeding method. The method comprises the following steps: S10, constructing a floating mat main body in a breeding sea area; s20, a cage frame is constructed, the cage frame comprises a frame, the frame comprises a plurality of supporting pipes arranged at intervals, and at least two floaters are arranged below the frame; s30, fixing a plurality of young oyster strings and / or oyster cages with fresh oysters on the cage frame at intervals through cables; s40, the cage frame is put into a floating mat body through a suspension arm; and S50, the cage frames in the floating mat main body are sequentially hoisted out through a suspension arm at set intervals, the cage frames and the oyster cages fixed to the cage frames are washed, the growth state of the oysters is observed after washing is finished, and the cage frames are put back into the floating mat main body. According to the oyster breeding method, the cage frame can be lifted out of the sea surface or connected with the floating mat body through the lifting arm of the workboat, the cage frame and attachments on the oyster cage can be conveniently and regularly cleaned, the growth condition of the oysters can be conveniently and regularly checked, and the problems of diseases and insect pests and the like can be timely found and treated, so that the death rate of the oysters is reduced, and the yield of the oysters is increased.

The invention belongs to the technical field of food detection, and particularly relates to an oyster freshness distinguishing method based on an electronic nose and prior information. According to the method, oyster smell data collected by an electronic nose system is combined with traditional oyster physicochemical indexes, and the prior weight of an oyster freshness prediction model is set by calculating the correlation coefficient of the oyster smell data collected by the electronic nose system and oyster physicochemical index information closely related to freshness change; and subsequently, the weight is adjusted through a compression and incentive mechanism to construct a reliable classification model, so that the screening capability, reliability and accuracy of the freshness key characteristics at the accurate distinguishing moment are improved, and high-accuracy oyster freshness distinguishing is realized for the oyster freshness.

The invention relates to a modular gravity type net cage oyster raft which comprises a floating raft assembly, a cage frame assembly and an oyster cage. The floating mat assembly comprises a truss and a plurality of connecting pipes, the connecting pipes are connected to the interior of the truss, and a plurality of floating mat units arranged in a rectangular array are defined between the connecting pipes and the truss and / or between the connecting pipes; each cage frame assembly comprises a frame and floaters, the floaters are fixedly arranged below the frame, and the cage frame assemblies are detachably connected to at least one floating mat unit; and the plurality of oyster cages are hung on the frame and are used for culturing oysters. According to the invention, the oyster row is arranged into three modules which can be separated from each other, so that subunit operation of the workboat is facilitated, the workload of farmers is reduced, the efficiency and the safety of mounting or harvesting the oyster cages are improved, and the floaters are arranged on the cage frame assemblies, so that the downward pressure of the cage frame assemblies on the floating row assemblies is reduced, the buoyancy of the oyster row is enhanced, the service life of the oyster row is prolonged, and the storm resistance of the oyster row is improved.

The invention belongs to the field of closed-shell oyster fatness degree nondestructive testing, and provides a closed-shell oyster fatness degree nondestructive testing method and a closed-shell oyster fatness degree nondestructive testing system based on multi-sensor heterogeneous data fusion, and the method comprises the following steps: collecting heterogeneous data of a sensor to be detected and detecting a fatness degree classification model; wherein the training process of the fatness degree classification model comprises the steps of multi-type data acquisition, data preprocessing, data set division, data fusion, fatness degree classification model training and model verification. According to the method, more sufficient and complementary information is provided for detection of the fatness degree of the closed-shell oysters through fusion of multi-source heterogeneous data, the fatness degree of the closed-shell oysters can be accurately identified, the method has the advantages of real-time performance, non-invasiveness, high accuracy and the like, nondestructive detection of the freshness of the closed-shell oysters is achieved, and the detection accuracy of the freshness of the closed-shell oysters is improved. And a more powerful nondestructive testing technical support is provided for sustainable development of the oyster industry.

The invention relates to the technical field of oyster meat yield prediction, and particularly discloses an oyster meat yield prediction method based on multi-modal fusion, and the method comprises the steps: collecting an original oyster image, and obtaining apparent data and shape parameters through a segmentation network; respectively carrying out feature extraction through a self-attention mechanism and a variational auto-encoder to obtain feature vectors; splicing and fusing the feature vectors based on a Concat method, and constructing a fused feature vector; constructing a multi-layer perceptron regression prediction model by taking the fusion feature vector as input and taking the oyster meat percentage as target output; and carrying out validity verification on the trained prediction model by using the test set. According to the method, feature extraction and splicing fusion are performed through the apparent images and the shape parameters of the oysters, the prediction model suitable for the oyster meat percentage is constructed, interaction rules of different dimensions among the features can be better captured, the model prediction precision is remarkably improved, and the problems of low manual sorting efficiency and large measurement errors in the prior art are avoided.

The invention relates to a self-cleaning module type gravity type net cage culture system which comprises a floating mat assembly, a floating mat assembly and a gravity type net cage culture system. The cage frame assembly comprises frames and floaters, each frame is arranged on two adjacent floating mat units, the two ends of each frame are connected with the two ends of the two adjacent floating mat units respectively, and the floaters are fixedly arranged below the frames; the plurality of oyster cages are hung on the frame and are used for culturing fresh oysters; the cleaning assembly comprises a mounting frame and cleaning mechanisms, the mounting frame is connected with the floating mat assembly, the mounting frame can swing relative to the floating mat assembly, the multiple cleaning mechanisms are arranged along the mounting frame at intervals, and each cleaning mechanism can make contact with at least two adjacent oyster cages; and / or each oyster cage is in contact with at least one cleaning mechanism. Compared with the prior art, the cleaning assembly cleans the oyster cage under the action of water flow and stormy waves, so that the time interval for cleaning the oyster cage on water is prolonged to 3-6 months.

The automatic cleaning and sorting assembly line for the oyster comprises a washing mechanism, a large-specification screening mechanism, a friction cleaning mechanism, a dehumidification mechanism and a weight sorting mechanism which are sequentially connected, a high-pressure water gun and a stirrer are arranged in the washing mechanism to wash the oyster, and a discharging opening of the washing mechanism is connected with the large-specification screening mechanism; the large-specification screening mechanism is provided with a mounting frame for preliminarily screening the oyster according to the size, the tail end of the large-specification screening mechanism is connected with the friction cleaning mechanism, the friction cleaning mechanism is provided with brush rollers and can conduct friction cleaning on shells of the oyster, the tail end of the friction cleaning mechanism communicates with the dehumidification mechanism for air drying, and the weight sorting mechanism is arranged at the tail end of the dehumidification mechanism. And sorting the oyster according to the gram weight, and removing the oyster which does not conform to the gram weight.

The invention discloses a wind-fishing mechanism combining floating type fans and an oyster discharge field and a simulation method, and belongs to the technical field of wind power engineering, the wind-fishing mechanism comprises four floating type fans, the floating type fans are distributed in a rectangular shape, anchoring lines are installed at the bottom ends of the floating type fans, and shared mooring lines are arranged between the adjacent floating type fans. According to the method, the four sets of floating type fans are distributed in a rectangular mode, the floating type fans are preliminarily fixed through one set of anchoring lines respectively, then the adjacent floating type fans are reinforced through the shared mooring lines, a rectangle is defined by the adjacent floating type fans, and then the oyster ranks are arranged between the interiors of the floating type fans; and finally, the connecting mechanism is used for connecting the oyster raft with the shared mooring line, so that when the device is used, the material cost, the installation cost and the like of a floating wind power plant mooring / anchoring system are remarkably reduced, and on the other hand, the middle area is used for developing the oyster raft breeding pasture, and the characteristics of intensive sea use and three-dimensional sea use are achieved.

The utility model discloses an oyster breeding platform driven by wave energy, which comprises a platform body (1), and is characterized in that the platform body (1) comprises a plurality of hollow shells (2) which are parallel to one another, the adjacent hollow shells (2) are connected through a plurality of cross beams (3), a plurality of groups of support frames (4) are arranged on the platform body (1), a rotating cage (5) is rotatably supported on the support frames (4), and the rotating cage (5) is connected with the hollow shells (2) through the cross beams (3). The platform body (1) is further provided with a plurality of Solter type nodding duck mechanisms (6), the output end of each Solter type nodding duck mechanism (6) is connected with a rotating shaft of one rotating cage (5) through a belt wheel transmission pair, and the four corners of the platform body (1) are further connected with floating barrels (8) through ropes (7) respectively.

The invention relates to a low-carbon ecological oyster breeding cement substratum and a preparation method thereof, and belongs to the technical field of crossing of aquatic product culture and cement-based materials. The invention aims to solve the problems of high cement consumption, severely poor concrete durability, low efficiency of inducing attachment of oyster larvae, high carbon emission and the like of the oyster attachment base, and the problem that the oyster attachment base for breeding is difficult to prepare due to the existence of coarse aggregate. The invention provides a low-carbon ecological oyster breeding cement substratum, which is prepared from the following components in percentage by weight: 15.0 to 58.8 percent of carbonate gelling material, 29.0 to 71.0 percent of sand and 3.8 to 28.6 percent of water. The carbonate cementing material is adopted, and the dark pigment and the calcium carbonate material are doped, so that the prepared cement-based material is high in capability of inducing attachment of oysters.

The invention discloses an oyster carbon sink value evaluation method, model and equipment based on carbon sequestration amount, and a medium. The method comprises the following steps: collecting oyster breeding data in an oyster breeding process; the method comprises the following steps: respectively calculating an oyster body carbon sequestration amount, an oyster attached organism carbon sequestration amount and an oyster biological sediment carbon sequestration amount according to oyster breeding data, and summarizing the oyster body carbon sequestration amount, the oyster attached organism carbon sequestration amount and the oyster biological sediment carbon sequestration amount into a total oyster breeding carbon sink amount; and calculating the carbon sink value of the oysters according to the total carbon sink amount of the oyster culture. According to the method, a traditional culture shellfish carbon sequestration basic metering method is improved, carbon sequestration amount calculation is carried out on oyster bodies and biological sediments of attached organisms respectively, the more accurate oyster culture carbon sequestration total amount can be obtained, and the carbon sequestration income of oysters is calculated based on the carbon sequestration total amount. The method is beneficial to enriching the basic research in the field of shellfish culture carbon sink accounting, and enables the ecological service value of the shellfish culture industry to be compensated through carbon sink transaction.

Systems and methods for flipping floating oyster cages are disclosed. The system includes a support structure that when in a deployed position, the second end is submerged in water and the first end remains above water, a carriage configured to travel along the support structure and to engage with a floating cage, and a lifting device configured to move the carriage. The carriage includes a carriage guide moveably attached to the support structure, a lift arm attached to the carriage guide, a balance bar attached at the distal end of the lift arm, and a flipping apparatus. The flipping apparatus includes a carriage table coupled to the balance bar at the distal end of the lift arm such that the carriage table rotates about a rotation axis of the balance bar, where the carriage table includes a lifting frame adapted to allow water to flow through the lifting frame.

The invention relates to the technical field of coatings, and discloses a deep-sea pressure-resistant shell protective coating and a preparation method thereof.The preparation method comprises the following steps that a base material is treated, epoxy resin modified polyurethane, reinforcing filler, anti-corrosion filler, a curing agent and a solvent are sequentially added according to a preset proportion and mixed to be uniform, primer is prepared, and the base material is sprayed with the primer; and then taking the isoxazole modified polyurea as finish paint, and spraying the finish paint on one side, deviating from the base material, of the primer to obtain the protective coating. The protective coating has excellent waterproof performance, impact resistance, wear resistance and organism adhesion resistance, and can effectively prevent corrosion factors such as moisture and various ions in seawater and various fouling organisms such as barnacles, mussels, oysters and sponges in seawater from being in contact with the surface of a base material.

The invention discloses an indoor detoxification seedling raising method for plectropomus leopardus, and relates to the technical field of biology. The seedling raising method comprises the steps that after an indoor seedling raising pond is sterilized and killed, newly hatched seedlings of plectropomus leopardus are put into the indoor seedling raising pond, and after the newly hatched seedlings open to eat food, different sterilized and killed baits are adopted for feeding the seedlings in a stepped mode for seedling raising culture. According to the method, multiple baits such as nannochloropsis oculata, oyster larvae, SS rotifers, S rotifers, L rotifers, fairy shrimp nauplius larvae, copepod nauplius larvae, copepod middle worms, fairy shrimp adults and copepod adults are fed in a stepped mode, rapid growth of the plectropomus leopardus juvenile fish is promoted, the disease resistance of the juvenile fish is effectively improved, the environment adaptability is enhanced, and the survival rate of the plectropomus leopardus is increased. And the survival rate is well improved.

This invention relates to the field of coating technology, and discloses a deep-sea pressure-resistant hull protective coating and its preparation method, comprising the following steps: substrate treatment, sequentially adding epoxy resin-modified polyurethane, reinforcing filler, anti-corrosion filler, curing agent and solvent in a predetermined proportion and mixing evenly to obtain a primer, and spraying the primer onto the substrate; then using isoxazole-modified polyurea as a topcoat, spraying the topcoat on the side of the primer away from the substrate to obtain the protective coating. This protective coating has excellent waterproof performance, impact resistance, wear resistance and anti-bioadhesion ability, and can effectively prevent water, various corrosive factors such as ions in seawater, and various polluting organisms in seawater such as barnacles, mussels, oysters and sponges from contacting the substrate surface.

The invention discloses multifunctional sea grass cultivation equipment, and relates to the technical field of sea grass cultivation. The sea grass breeding mechanism is arranged at the bottom of the buoy mechanism and comprises a connecting frame and a breeding frame, the whole breeding frame is conical and spirally surrounds the connecting frame, the upper end of the breeding frame is fixedly connected with the connecting frame so that the lower portion of the breeding frame can shake up and down, and a damping mechanism is arranged between the lower end of the breeding frame and the connecting frame. Sea grass is cultivated through the upper conical spiral frame, the stability of the spiral frame is improved, the illumination condition of the sea grass is met, oysters are cultivated on the lower portion of the sea grass through the lifting rope, and cooperative growth of the sea grass and the oysters is promoted. The sea grass culture and the aquaculture are integrated, the sea grass carbon sink capacity and the marine fishery economic value can be increased in the same unit area, and meanwhile the equipment has the marine environment monitoring capacity through various water quality sensors in the equipment.

The utility model provides an ecological reef body row which comprises a bottom row, a sand rib bag body, a plurality of reef bodies and connecting ropes, the bottom row is arranged at the lowest position, the sand rib bag body is arranged on the periphery of the bottom row and fixed, the reef bodies are arranged on the bottom row, the reef bodies are connected in series through the connecting ropes, and hollow round holes are formed in the reef bodies. The ecological reef body row is convenient to manufacture and install, can effectively protect a beach face from being scoured and eroded, is of a concrete structure, large in dead weight, high in strength, better in integrity after being connected in series through the connecting ropes, capable of resisting impact of waves and tidal currents, large in surface area and roughness due to the fact that the reef bodies are of a hollow structure in the middle and provided with vertical cylinders on the periphery, and capable of effectively preventing the beach face from being scoured and eroded. An enemy and inhabiting environment is provided for oysters and other marine organisms, growth and reproduction of the oysters and the other marine organisms are facilitated, besides wave dissipation and flow weakening can be achieved through the reef columns, a plurality of bagged shells with oyster seeds can be hung on the grooves in the tops of the reef columns, and the attachment area of the oysters is further increased.

The invention provides an artificial breeding method for echinacea chlamydoides. The artificial breeding method comprises the following steps: S1, selecting parent fish; s2, performing nutrient enrichment culture on the parent fish; s3, artificial spawning and fertilization; s4, artificial incubation; s5, seedling cultivation. The feed is reasonably matched to promote parent fish development and improve egg laying and sperm production quality, spawning hormone is manually injected, injection dosage is strictly controlled, eggs and sperm which are well developed are obtained, hatching conditions of the fertilized eggs are controlled, the hatching rate of the fertilized eggs reaches 90% or above, and the hatching rate of the fertilized eggs reaches 90% or above. According to the method, oyster fertilized eggs, rotifers, artemia or cladocerans / copepods nauplii, cladocerans / copepods and floating type larva fry breeding seawater fish compound feed are sequentially fed in the fry breeding period, palatable bait series of different fry breeding stages are established, and a mature fry breeding technical route is formed.

The invention belongs to the technical field of aquatic product processing, and discloses a shell opening solution for Fujian oysters and application. The invention provides a shell opening solution for Fujian oysters. The shell opening solution comprises a magnesium chloride solution with the concentration of 0.5 mol / L-0. 6 mol / L and / or a glucose solution with the concentration of 0.5 mol / L-0. 6 mol / L. The shell opening solution is used for conducting living body paralysis on the Fujian oysters and then conducting shell opening, the food safety risk of manual oyster opening and meat taking is reduced, the Fujian oyster shell opening and meat taking efficiency is improved, manual operation is reduced, and the oyster opening rate of a biological shell opening method can reach 90% or above. The oyster meat processed by the shell opening solution is higher in yield and free of salt ion residues, various indexes of aquatic product processing are met, and oyster juice prepared from the oyster meat is better in quality, flavor and preservative capacity.

The utility model relates to the technical field of breeding cages, in particular to an oyster breeding cage lifting device adapting to tidal changes. Comprising a floating box, an aquaculture net cage which is arranged at the bottom of the floating box and can move longitudinally, a lifting mechanism which is arranged at the bottom of the floating box and used for driving the aquaculture net cage to move longitudinally, and limiting rods which are longitudinally arranged on the two sides of the floating box and used for limiting the moving path of the aquaculture net cage. A rotatable winding roller is arranged at the bottom of the first fixing frame, and a first winding wheel is rotationally arranged on the side, close to the winding roller, of the bottom of the first fixing frame. A second fixing frame is arranged in the center of the top of the culture net cage, and a second reel is rotationally arranged in the second fixing frame; a flexible winding wire is fixed to the top end of the second fixing frame. The aquaculture net cage can be longitudinally and stably lifted. The problem that the depth of the breeding cage is inconvenient to adjust is solved.

The utility model provides an oyster mushroom culture fungus bag, which comprises a fungus bag main body and a water supplementing water tank, mushroom outlet holes are arranged on the fungus bag main body, the fungus bag main body comprises an outer bag body and an inner bag body, the inner bag body is filled with culture materials, a water accumulating cavity is arranged below the outer bag body, the water accumulating cavity is arranged below the inner bag body, and the water supplementing water tank is arranged below the outer bag body. The water supplementing water tank is arranged above the fungus bag body, a detachable top cover is installed on the water supplementing water tank, the top cover is matched with the water supplementing water tank in a shielding mode, the water supplementing water tank is communicated with the plastic hose through a transverse pipe, a water supplementing pipe is arranged in the inner bag body, the upper end of the water supplementing pipe is communicated with the plastic hose, and a water dripping hole is formed in the bottom of the inner bag body. A drainage pipe is arranged at the lower end of the right side of the outer bag body and communicates with the water accumulation cavity, and small water outlet holes are evenly formed in the pipe wall of the water supplementing pipe. Excess water at the bottom of the fungus bag can be conveniently discharged, water accumulation in the bag is avoided, meanwhile, the top cover is matched with the water replenishing tank in a shielding mode, water pollution is avoided, and application and popularization are facilitated.

To provide a spacer core for culturing oysters which can maintain required intensity as a spacer core for culturing oysters even being immersed in the sea for a long period, and in which a paper tube part is quickly decomposed relative to plastic, even if the spacer core is flowed to the sea, thereby reducing environmental loads.SOLUTION: There is provided a spacer core for culturing oysters which is used by being arranged between shells. The spacer core for culturing oysters is made of a paper tube in which an epoxy resin solution is impregnated.SELECTED DRAWING: Figure 2

This invention provides a slow-release feed device for marine aquaculture, relating to the field of marine aquaculture technology. It includes a rotating drum, a drum cover, and a fixed shaft. A rotating impeller is mounted on the rotating drum, which is connected to the drum cover to form a cylindrical space. The fixed shaft passes through the central axis of the rotating drum and drum cover and is rotatably connected to them. A cake holder, a feed cake, and a cake brush are installed within the cylindrical space. The cake holder is fixedly connected to the fixed shaft, and the feed cake is mounted and fixed on the cake holder. The cake brush rotates synchronously with the rotating drum, brushing the surface of the feed cake to accelerate slow release. Utilizing ocean currents or the up-and-down movement of seawater, the rotating impeller drives the rotating drum to rotate, which in turn drives the cake brush to continuously brush the slow-release flocculated layer formed on the surface of the feed cake. This effectively accelerates the diffusion and release of feed particles, solving the problem of excessively long natural slow-release time for feed cakes and their inability to pass through a 150-mesh or finer silk sieve, thus meeting the needs of aquaculture such as oyster farming.

The utility model discloses a triploid oyster three-dimensional layered culture frame which comprises a main body, a lifting assembly is arranged in the main body, and a detection assembly is arranged in the lifting assembly. The lifting assembly comprises a plurality of mounting seats, screw rods are arranged on the outer walls of the bottoms of the mounting seats, rotating discs are mounted on the outer walls of the bottom ends of the screw rods through bolts, and rotating rods are movably mounted on the outer walls of the bottoms of the rotating discs through rotating shafts. Through the arranged lifting assembly, after the motor is started, the motor can drive the screw to start to rotate, the rotating disc can be driven to rotate along with the rotation of the screw, when the rotating disc rotates, the other rotating disc and the screw can be further driven to rotate by means of the action of the rotating rod and the connecting rod, and in the rotating process, the screw can drive the rotating disc to rotate through the action of the chain wheel and the chain. By means of the structure, the device can effectively achieve separation of water and triploid oysters, and a user can conveniently collect the triploid oysters.

The present application relates to a kind of technology for inducing marine sessile organism attachment, especially a kind of fiber reinforced ecological concrete and preparation method, belong to the cross field of marine sessile organism and marine concrete.Its material components include: cementitious material, broken stone, sand, water, dark pigment, biological calcium powder, calcium carbonate powder, trace element, chopped fiber and superplasticizer.The purpose of the present application is to induce sessile organism attachment, mainly oyster, in the tidal zone reinforced concrete corrosion prevention, considering the attachment of barnacle.By controlling to use dilute acid modification and composite grinding technology, the inducing capacity of bovine bone powder is fully exerted, the bovine bone powder content is greatly reduced, and corrosion prevention treatment and modification are carried out, a composite inducer mainly composed of bovine bone powder is realized, the content is small, and the concrete strength and permeability are almost not affected.

The invention relates to the technical field of biology, in particular to a biological substrate modification composition, a preparation as well as a preparation method and application of the biological substrate modification composition. The biological substrate modification composition provided by the invention is prepared from the following components: bacillus subtilis YXSY-01 bacterial powder, sphingomonas aquatic bacteria HD-01 bacterial liquid, bentonite, oyster shell powder, attapulgite, zeolite powder, fish bone meal of raw fish and water. The biological substrate modification composition is prepared from the following raw materials in parts by weight: 20-30% of corn starch, 20-30% of corn starch, 20-30% of corn starch, 20-30% of corn starch, 20-30% of corn starch, 20-30% of corn starch, 20-30% of corn starch, 20-30% of corn starch, 20-30% of corn starch, 20-30% of corn starch and 20-30% of corn starch. The biological substrate modification composition and the preparation provided by the invention have the capabilities of degrading faeces of bred animals and reducing the content of nitrite. The composition and the preparation can reduce the accumulation of excrement of cultured animals in a culture pond, reduce the nitrite content, purify the water quality of the culture pond and reduce the morbidity of the cultured animals.

The invention relates to the technical field of classification cultivation of oysters, in particular to a classification cultivation device for crassostrea hongkongensis, which comprises a classification mechanism, a cultivation mechanism, a material taking mechanism, a material supply mechanism and an oxygen supply mechanism. A stirring shaft is filled with phytoplankton particles, then a second oxygen pipe and the stirring shaft are communicated, an oxygen supply machine and an electric heater are turned on, then after seawater in the culture box reaches a proper temperature, male oysters and female oysters in the culture box are mutually fused and bred, then a PLC is externally connected, a first electromagnetic valve and a second electromagnetic valve are turned on, and the stirring shaft is opened. Then sea water in the water tank rushes seedlings in the water tank into the nutrition tanks one by one, then an electric push rod and a toothed plate are started to enable a stirring shaft with a toothed ring to circularly rotate clockwise and anticlockwise, then phytoplankton particles and oxygen in the stirring shaft flow into the nutrition tanks from through holes, and then the seedlings are stirred by the stirring shaft; each position in the nutrition box is filled with phytoplankton particles, feeding of oysters at each position is facilitated, systematic professional cultivation is achieved, and the yield and quality of the oysters are improved.