37results about How to "Improve primary productivity" patented technology

This invention discloses an ecological polyculturing method of sea cucumber, Penaeus monodon and Portunus trituberculatus, which comprises the following steps: choosing the Portunus trituberculatus and Penaeus monodon with quick growth speed and high economic value based on the biological characteristics that the sea cucumber and decapod crustacean have different growth time and nutrition levels;and making full use of the idle water and abundant natural baits in the pond during the aestivation of the sea cucumbers to polyculture sea cucumbers, shrimps and crabs. The culturing method is characterized by optimizing the ecological environment of the pond, reducing pollution discharge and disease spread, using the water space effectively, reducing culturing and producing cost, increasing culturing output, etc.

The invention discloses special EM (Effective Microorganisms) bacteria powder for aquaculture, as well as a preparation method and application of the special EM (Effective Microorganisms) bacteria powder. Bran, corn flour, amino acid powder and the like, which are used as dry matter fillers, are mixed with brown sugar, glucose and the like to obtain a mixture; the mixture is subjected to sealing fermentation at 25-37 DEG C for about 10 days by lactic acid bacteria, bacillus licheniformis and bacillus coagulans, so that fermented materials are prepared; then the prepared fermented materials are dried and crushed and are mixed with bacillus subtilis to obtain a final product. The EM bacteria powder can be directly scattered in a water body to inhibit pathogenic microorganisms through mass propagation of probiotics, decompose harmful substances in the water body, promote the growth of normal floras and beneficial algae in a cultivation ecosystem and keep the ecological balance of the aquaculture water body. The method is adopted to prepare the EM bacteria powder, the fermentation period is short, the process is simple, the equipment investment is low, the materials are convenient to obtain, and the method is easy to implement and is suitable for industrial production and self-production of households.

The invention discloses a mobile oxygenation device for a bottom water body of an aquaculture pond. The oxygenation device comprises a solar power assembly, an upper layer water body extraction assembly, a first floating body and a second floating body, wherein the first floating body is used for bearing the solar power assembly; the second floating body is used for bearing the upper layer water body extraction assembly; the first floating body and the second floating body are connected integrally through a connecting rod; the solar power assembly comprises a solar power generation plate, a solar power source, a guide bracket and a driving motor; and the upper layer water body extraction assembly comprises an upper layer water body extraction barrel and propeller blades. With the adoption of the device, the oxygen production capability of phytoplankton in the pond is used, and supersaturated dissolved oxygen produced by the phytoplankton on the water body surface of the pond at noon is extracted to the anoxic water body at the bottom of the pond and stored, so that the dissolved oxygen content in the whole pond is significantly increased, and problems of oxygen deficiency at the bottom of a traditional pond, water quality stratification and previous insufficient utilization of the oxygen produced by the phytoplankton are solved. The solar plate is used as a power source, and the device is independent of external power sources and electric wires, so that the device can be used normally in unpowered regions.

The invention relates to a multifunctional fishpond deep-layer oxygenation water treatment machine, which consists of on-water equipment and underwater equipment, wherein the on-water equipment comprises an equipment carrier, a solar generator set, a wind energy generator set, a programmable controller and a material liquid storage tank, the solar generator set, the wind energy generator set, the programmable controller and the material liquid storage tank are arranged on the equipment carrier, an electric valve is arranged on the material liquid storage tank, the solar generator set, the wind energy generator set and the electric valve are connected with the input end of the programmable controller and are controlled by the input end of the programmable controller, the underwater equipment comprises a main pipeline, a direct current submersible pump, a parallel Venn machine set and a fountain aeration matrix group, the direct current submersible pump is arranged on the main pipeline, the parallel Venn machine set is formed by parallelly connecting a plurality of Venturi tubes, and the fountain aeration matrix group consists of a plurality of fountain aeration matrixes. The equipment is clean and environment-friendly, the investment is low, safety and reliability are realized, the unattended operation can be realized, the operation cost is low, the oxygenation efficiency is high, the whole water body of the sealed pond can form the relatively stable flowing state, good water body ecological environment is formed, and in addition, the effect can also be realized when the equipment is used in the frozen season in winter.

The invention relates to a device of a pond culture machine, in particular to a mechanical device which can automatically move, run and work in a pond, i.e., a pond bottom sediment agitator, wherein a horizontal sliding plate (131) is arranged on the bottom of the pond bottom sediment agitator, an L-shaped cylindrical water barrel (132) is arranged above the horizontal sliding plate (131), stainless steel screens (135) used for preventing fish from entering are arranged at an upper opening and a lower opening respectively, a floating body assembly (138) is used for clamping the exterior of the water barrel (132), a sediment lifting device (134) is arranged inside a vertical tube of the water barrel (132), a submersible motor (134-g) is used for supplying driving power and transfers the power to an air floating output shaft (134-b) at the lower end part through an output shaft by a gear box and to a propeller (134-d) which is arranged relatively upwards through another output shaft which has another speed, and the air floating output shaft (134-b) is connected with a driving air floating generator (134-a). The pond bottom sediment agitator has a simple structure, is easy to manufacture and convenient to use, has a good bottom sediment agitating effect and an oxygen increasing effect, and enables the pond bottom sediment to give full play to the ecological functions without polluting the environment.

The invention discloses a novel artificial fish reel which is applicable to the open sea area with high flowing speed. Upwelling can be produced on the incident flow surface of the fish reel to convey nutritive salt on the bottom layer upwards, the primary productivity of the local sea area is improved, and the similar ecological effect of a large fish reel can be achieved. Further, the bottom of the novel artificial fish reel can be automatically buried into a sea bed to facilitate fixation. In addition, the novel artificial fish reel is small in size, and the height is less than 3m. Therefore, as long as the artificial fish reel is reasonably arranged, the artificial fish reel cannot affect ship navigation even when the fish reel is used in the sea channel area where ships come and go frequently.

The invention discloses a special compound microorganism preparation for aquaculture and a preparation method thereof and belongs to the technical field of aquaculture science. The compound microorganism preparation is prepared from the following components in percentage by weight: 30 to 50 percent of a solution A and 50 to 70 percent of a solution B, wherein the solution A contains rich insect protein and fish body protein and is decomposed into a plurality of amino acids, calcium, iron, a plurality of active peptides and chitin through microorganisms; the solution B is prepared from tocopherol, lipopolysaccharide, squalane, refined unsaturated fatty acid and vitamin and has a protection effect on heart and blood vessels of animals. The compound microorganism preparation disclosed by theinvention can keep and stabilize the quantity of phytoplankton and beneficial microorganisms, so that algal fungi in a water body keep balance; the water body of the culture water body can be remarkably improved and the growth of animals including fishes, shrimps and crabs and the like is facilitated; the yield and quality of bred aquatic products are greatly improved.

The invention relates to a water fertilizing method for large-water-surface pond culture. The method comprises the following steps: detecting indexes of bottom sludge of a pond; recording detection results: (a) the content of ammonia nitrogen exceeds 20mg / L, and the content of labile phosphorus exceeds 6mg / L; and (b) the content of ammonia nitrogen exceeds 20mg / L, and the content of labile phosphorus is lower than 6mg / L; and adopting different water fertilizing routes. According to the water fertilizing method for the large-water-surface pond culture, provided by the invention, the problems in a large-water-surface pond culture process that water fertilizing is difficult, the water fertilizing cost is high, the water fertilizing effect is poor, bottom sediments of the culture pond are deteriorated, a large amount of organic matters are accumulated, and the oxygen content is low are solved, pond culture conditions are improved, and the yield of the culture is increased.

The invention relates to a water electrolyzing type artificial fish reef. The water electrolyzing type artificial fish reef is composed of a reef body, an electrolyzer and a floating device and can provide a necessary and safe habitat for gathering, foraging, breeding, growing and hiding of aquatic organisms such as fishes and further can generate an ascending flow which can change the distribution of a flow field in a sea area to drive exchange of bottom nutritive salt substances and an upper water body to provide nutrients for proliferation and growth of plankton in the upper water body and promote the breeding ability of planktons so as to form an excellent bait field. The bait field attracts migratory fishes to be gathered and detained to realize a better fish gathering effect, and meanwhile, a current generated by a solar power generation device can electrolyze desalted seawater. The electrolyzed oxygen can increase the oxygen content of seawater around the fish reef to create a good habitat for aquatic organisms such as shells and trepangs. The electrolyzed hydrogen is collected in a gas collecting box, so that a clean energy source can be provided, thereby greatly improving the primary productivity in the surrounding sea areas.

The invention relates to a fishery microelement fertilizer and a preparation method thereof, belonging to the technical field of aquaculture. The method comprises two major steps of proportioning the fishery microelement fertilizer and mixing and stirring. The fishery microelement fertilizer provided by the invention can promote the photosynthesis of algae, increase the density of beneficial algae in the water body of an aquaculture pond, improve the balance of algal facies and enhance the primary productivity of the culture water body; and by mixing the fishery microelement fertilizer with nitrogen, phosphorus and potassium in the bulk fertilizer, the fertilizer efficiency can be improved, the water quality of the pond water can be improved, the activity of the water body can be enhanced, and the consumption of the bulk fertilizer can be reduced; and moreover, the effects of reducing the morbidity of the farmed animal and improving the disease control of the farmed animal are realized.

The invention discloses a pelagic floating fish reef based on tide and wave power generation and belongs to the technical field of marine ranch artificial fish reefs. The pelagic floating fish reef comprises a bottom-layer fish reef, two ends of the bottom-layer fish reef are connected with a floating body through steel ropes, a plurality of power generator sets are arranged on the floating body,a netting is connected between the steel ropes, and an algal spore seeder is arranged below the middle of the netting. The pelagic floating fish reef combines a wave energy and tidal energy power generation device with a floating body structure of a floating fish reef to realize primary conversion from ocean energy to electric energy and can attract fishes to gather, so that primary productivity of a sea area is improved greatly.

This invention discloses an ecological polyculturing method of sea cucumber, Penaeus monodon and Portunus trituberculatus, which comprises the following steps: choosing the Portunus trituberculatus and Penaeus monodon with quick growth speed and high economic value based on the biological characteristics that the sea cucumber and decapod crustacean have different growth time and nutrition levels;and making full use of the idle water and abundant natural baits in the pond during the aestivation of the sea cucumbers to polyculture sea cucumbers, shrimps and crabs. The culturing method is characterized by optimizing the ecological environment of the pond, reducing pollution discharge and disease spread, using the water space effectively, reducing culturing and producing cost, increasing culturing output, etc.

The invention relates to an artificial fish reef achieving wave energy power generation. The artificial fish reef is composed of a reef body, a power generation device and a transmission device. The artificial fish reef can provide a necessary and safe rest place for gathering, foraging, breeding, growing and enemy avoiding of aquatic organisms such as fishes, can generate upwelling to promote circulation of nutrient salts in the seabed and enhance the breeding capability of plankton to form an excellent bait field so as to attract gathering and retention of migratory fishes, and also can achieve environment-friendly power generation through wave energy. An LED lamp connected with the artificial fish reef can form a light environment to achieve a certain biological effect on attracting the fishes, and then the purposes of protecting and increasing fishery resources and increasing the fish catch are achieved.

The invention relates to an easy planting method for lake submerged plant through water interception, which proposes that lake mud containing corresponding materials capable of helping submerged plant to propagate and grow, such as roots, stems, seeds and buds are used for quickly and easily plant the lake submerged plant in a planting area without underflow. In the easy planting method, a large planting area of more than 0.25 square kilometers and a small water interception area of 2500 to 10,000 square kilometers are surrounded by floating enclosures with full height or half height so as to prevent blue algae out of the planting areas and wind-driven lake current from damaging the plant in the planting areas; the method of dredging along a strip-shaped area biennially is utilized, the lake mud in the areas for helping the submerged plant to propagate and grow is dredged to obtain the materials capable of helping the submerged plant to propagate and grow, such as roots, stems, seeds, buds and the like, and the mud is uniformly thrown into the planting areas as much as possible. The planting method of the present invention has simple and quick effect, low cost and high efficiency, the submerged plant can recover propagation and growth easily and quickly, and the problem that present technique for recovering the propagation and growth of the submerged plant in free lake water areas has complexity, high cost and difficulty in generalization is solved.

The invention discloses a pull-type layered artificial flexible floating fish reef, which comprises floating balls connected in series by anchor ropes, iron rings are sheathed on the anchor ropes under the floating balls, and opposite surfaces are respectively arranged on the upper and lower sides of the iron rings to repel each other. Magnet a and magnet b are set, one end of the hoop pulls the main cable through the anchor rope, the upper part of the main cable is evenly distributed with floating fish reefs, the lower part of the main cable is connected in series with a counterweight, and the lower end of the anchor cable is fixedly connected to the anchor block. A string of floating balls is fixed on the anchor block by using an anchor block at the lower end of the anchor rope for mooring, and the upper end is connected in series. The reef makes the overall firmness of the floating fish reef increase, thereby improving the safety performance, and it is easy to put in. The magnet a and the magnet b arranged on the opposite sides of the iron ring are repelled, which can generate suction to the iron ring, and pass through The iron ring limits the sinking and floating height of the floating fish reef, and the device has a simple structure, is economical and environmentally friendly, has universality, and is highly capable of mass feeding.

The invention discloses a liquid microbial agent containing polyglutamic acid and a preparation method thereof. The liquid microbial agent is prepared from 1-20 parts of a growth-promoting bacterium liquid, 1-20 parts of polyglutamic acid, 1-20 parts of mineral substances, 50-70 parts of bioorganic matter, 1-5 parts of chlorophyll and 1-5 parts of vitamin. The composite liquid microbial agent hasthe advantages of being high in water-soluble speed and content of viable organisms, and capable of inhibiting pathogenic microorganisms, flocculating harmful substances in a water body to purify water quality, chelating heavy metal ions in the water body to alleviate the toxicity of the heavy metal ions, and promoting photosynthesis of algae to provide aquatic animals with rich nutrition, and hasmultiple functions of water purification, production increase and the like.

The invention relates to the technical field of aquaculture equipment, and particularly relates to an aerator. The aerator comprises a motor and a pump head, wherein the outer casing of the motor is fixed to the pump head by fasteners; one side of the pump head is provided with an air inlet; the air inlet is connected with an air inlet pipe; a containing cavity is arranged in the pump head; the containing cavity is provided with a connecting member; a rotating shaft of the motor passes through the middle of the pump head and is fixedly connected with the connecting member; an air guide hole isformed in the connecting member; an air outlet pipe communicates with the lower end of the connecting member; the containing cavity communicates with the air outlet pipe through the air guide hole; an impeller is fixedly connected to one end of the air outlet pipe; and a plurality of air outlet holes are formed in the impeller. According to the aerator, ozone is led out from the air outlet holesformed in the circumferential side of the impeller, a larger diffusion range is achieved, dissolved oxygen in the water can be increased while the river water is disinfected, the water quality is improved, primary productivity in the water body is increased, the occurrence of diseases in the benthic culture species in ponds is reduced, and the survival rate is increased, thereby increasing production.

The invention discloses a method for regulating nematode trophic groups of a lawn compost medium by means of carbon nanomaterials. The method comprises the steps that 1,500 g of soil is loaded into each plastic pot, 50 g of domestic rubbish compost is added into each pot, and the domestic rubbish compost and the soil are compounded into a lawn establishment medium; the carbon nanomaterials of graphene, graphene oxide and carbon nanotubes are added according to the proportion that each carbon nanomaterial accounts for 1% (w / w) of the mass of the soil, a treatment group without the carbon nanomaterial serves as a control group, 5 g of seeds of lawn plant festuca arundinacea are seeded into each pot, an experiment is conducted indoors, the whole experiment lasts for 130 d, and the first harvest is mowed on the 65 d for determination. It is shown through experimental results that after the carbon nanomaterials are added, not only are growth and propagation of most trophic group nematodes promoted, but also a positive influence is brought to growth of the plant.

The invention discloses an oscillating water column wave energy utilization gas injection artificial upwelling device with a floating breakwater function and a method and belong s to the field of marine engineering. The oscillating water column wave energy utilization gas injection artificial upwelling device with the floating breakwater function is characterized by being composed of a wave energy conversion module, a gas injection module, an anchor chain and a sinker; the wave energy conversion module is suspended on the sea surface, and the lower end of the wave energy conversion module is connected with the sinker by the anchor chain; and the upper part of the gas injection module is connected to the wave energy conversion module, and the lower part of the gas injection module is constrained by a tightening device so as to be attached on a backwave side anchor chain. The method for realizing the oscillating water column wave energy utilization gas injection artificial upwelling device with the floating breakwater function comprises the following steps: device mounting, a process of converting wave energy into air kinetic energy, a process of supplementing air into an air chamber, a process of generating artificial upwelling by gas injection, circulating and repeating. The wave energy is converted and utilized by using a back-bent-tube oscillating water column technology, the artificial upwelling is formed by a gas injection artificial upwelling technology, the device has the advantages of high wave conversion rate, obvious deep-layer seawater lifting effect, durability, good reliability, low engineering investment cost, energy saving, environment friendliness and the like and can be concurrently used as a floating breakwater.

The invention relates to a water fertilizing method for large-water-surface pond culture. The method comprises the following steps: detecting indexes of bottom sludge of a pond; recording detection results: (a) the content of ammonia nitrogen exceeds 20mg / L, and the content of labile phosphorus exceeds 6mg / L; and (b) the content of ammonia nitrogen exceeds 20mg / L, and the content of labile phosphorus is lower than 6mg / L; and adopting different water fertilizing routes. According to the water fertilizing method for the large-water-surface pond culture, provided by the invention, the problems in a large-water-surface pond culture process that water fertilizing is difficult, the water fertilizing cost is high, the water fertilizing effect is poor, bottom sediments of the culture pond are deteriorated, a large amount of organic matters are accumulated, and the oxygen content is low are solved, pond culture conditions are improved, and the yield of the culture is increased.

The invention discloses a method for restoring benthic animal resources in the artificial forest of Sangria apetalum. The present invention treats the sea mulberry forest, prunes or removes the weeds and miscellaneous shrubs under the forest and then replants the native mangrove plant seedlings; Increase the harvesting of benthic animals; then dig ditches under the sea mulberry forest; after the ditches are dug, first put in pioneer aquatic animal seedlings, then put in economic species benthic animal seedlings, and finally put swimming animals in the ditch seedlings. The present invention does not need to cut down the pure forest of Sangria apetalum that has been recovered into a forest, but reduces the influence of certain biological characteristics of Sangria apetalum on benthic animals by transforming the restored Sangria apetalum artificial forest , to achieve the purpose of sustainable utilization of the Sangria apetalum plantation swamp as a marine fishery base. At the same time, artificially proliferate some economic benthic animals, and establish the ecological balance of the artificial forest area - the best model for economic benefits.

The invention relates to an easy planting method for lake submerged plant through water interception, which proposes that lake mud containing corresponding materials capable of helping submerged plant to propagate and grow, such as roots, stems, seeds and buds are used for quickly and easily plant the lake submerged plant in a planting area without underflow. In the easy planting method, a large planting area of more than 0.25 square kilometers and a small water interception area of 2500 to 10,000 square kilometers are surrounded by floating enclosures with full height or half height so as to prevent blue algae out of the planting areas and wind-driven lake current from damaging the plant in the planting areas; the method of dredging along a strip-shaped area biennially is utilized, the lake mud in the areas for helping the submerged plant to propagate and grow is dredged to obtain the materials capable of helping the submerged plant to propagate and grow, such as roots, stems, seeds, buds and the like, and the mud is uniformly thrown into the planting areas as much as possible. The planting method of the present invention has simple and quick effect, low cost and high efficiency, the submerged plant can recover propagation and growth easily and quickly, and the problem that present technique for recovering the propagation and growth of the submerged plant in free lake water areas has complexity, high cost and difficulty in generalization is solved.

The invention discloses a cellular multifunctional fish reef. The cellular multifunctional fish reef comprises a framework mechanism, a light-supplementing system, a nutritional base pond, a feeding mechanism and anchoring mechanisms, wherein the framework mechanism adopts a plurality of bamboo brackets arrayed in an equal interval manner as a skeleton, and an outer frame of the skeleton is packaged with concrete; and the nutritional base pond is distributed in the framework mechanism, the feeding mechanism is arranged right above the framework mechanism, and the anchoring mechanisms are symmetrically arranged right below the framework mechanism. The cellular multifunctional fish reef with a nutritional base nest adopts a composite process technique, natural logs with corrosion resistanceat the water bottom and a phyllostachys edulis sectional material are combined as the framework, and the area of a surface layer of the fish reef is increased by skilling utilizing manners of bamboo drilling, slotting, splicing, pre-burying and the like; and by utilizing biological phototaxis, the light-supplementing system is arranged in an inner space to attract fishes to gather together, and anutritional base bed can be further formed, so that the primary productivity of an marine environment is rapidly improved, and nutritional bases depositing in the bottom of sea can be agitated by virtue of eddies and upwelling.

The invention discloses a mobile oxygenation device for a bottom water body of an aquaculture pond. The oxygenation device comprises a solar power assembly, an upper layer water body extraction assembly, a first floating body and a second floating body, wherein the first floating body is used for bearing the solar power assembly; the second floating body is used for bearing the upper layer water body extraction assembly; the first floating body and the second floating body are connected integrally through a connecting rod; the solar power assembly comprises a solar power generation plate, a solar power source, a guide bracket and a driving motor; and the upper layer water body extraction assembly comprises an upper layer water body extraction barrel and propeller blades. With the adoption of the device, the oxygen production capability of phytoplankton in the pond is used, and supersaturated dissolved oxygen produced by the phytoplankton on the water body surface of the pond at noon is extracted to the anoxic water body at the bottom of the pond and stored, so that the dissolved oxygen content in the whole pond is significantly increased, and problems of oxygen deficiency at the bottom of a traditional pond, water quality stratification and previous insufficient utilization of the oxygen produced by the phytoplankton are solved. The solar plate is used as a power source, and the device is independent of external power sources and electric wires, so that the device can be used normally in unpowered regions.

The invention relates to a multifunctional fishpond deep-layer oxygenation water treatment machine, which consists of on-water equipment and underwater equipment, wherein the on-water equipment comprises an equipment carrier, a solar generator set, a wind energy generator set, a programmable controller and a material liquid storage tank, the solar generator set, the wind energy generator set, the programmable controller and the material liquid storage tank are arranged on the equipment carrier, an electric valve is arranged on the material liquid storage tank, the solar generator set, the wind energy generator set and the electric valve are connected with the input end of the programmable controller and are controlled by the input end of the programmable controller, the underwater equipment comprises a main pipeline, a direct current submersible pump, a parallel Venn machine set and a fountain aeration matrix group, the direct current submersible pump is arranged on the main pipeline, the parallel Venn machine set is formed by parallelly connecting a plurality of Venturi tubes, and the fountain aeration matrix group consists of a plurality of fountain aeration matrixes. The equipment is clean and environment-friendly, the investment is low, safety and reliability are realized, the unattended operation can be realized, the operation cost is low, the oxygenation efficiency is high, the whole water body of the sealed pond can form the relatively stable flowing state, good water body ecological environment is formed, and in addition, the effect can also be realized when the equipment is used in the frozen season in winter.

The invention discloses a composite microbial preparation for promoting the phosphorous release of bottom sludge of an aquaculture pond, and a preparation method and a using method of the composite microbial preparation, and belongs to the field of microbial preparations. The composite microbial preparation consists of the following components in parts by weight: 30 to 60 parts of phosphate-solubilizing bacillus, 20 to 50 parts of phytase and 5 to 25 parts of sodium humate. Compared with the prior art, the composite microbial preparation, and the preparation method and the using method thereof have the beneficial effects that due to the use of the composite microbial preparation, deposited phosphorous of the bottom sludge of the aquaculture pond can be recycled and released for phytoplankton, the fertility of a water body can be improved, the problems of reutilization of the deposited phosphorous of the bottom sludge of the pond are solved, and meanwhile, the water quality and the sediment quality are improved.

The invention discloses a novel artificial fish reel which is applicable to the open sea area with high flowing speed. Upwelling can be produced on the incident flow surface of the fish reel to convey nutritive salt on the bottom layer upwards, the primary productivity of the local sea area is improved, and the similar ecological effect of a large fish reel can be achieved. Further, the bottom of the novel artificial fish reel can be automatically buried into a sea bed to facilitate fixation. In addition, the novel artificial fish reel is small in size, and the height is less than 3m. Therefore, as long as the artificial fish reel is reasonably arranged, the artificial fish reel cannot affect ship navigation even when the fish reel is used in the sea channel area where ships come and go frequently.

The invention relates to the technical field of water body monitoring, in particular to a real-time continuous in-situ water body monitoring device for a freezing period, which comprises a monitoring mechanism and an adjusting mechanism, the monitoring mechanism comprises a dark acrylic pipe and a bright acrylic pipe, the top of the dark acrylic pipe and the top of the bright acrylic pipe are both provided with sealing devices, dissolved oxygen probes are suspended in the dark acrylic tube and the bright acrylic tube, fine lines are bound on the dissolved oxygen probes and penetrate through the sealing device, chucks are arranged in the middle of the dark acrylic tube and the bright acrylic tube, and the adjusting mechanism comprises a fixing frame and two sets of adjusting frames. The adjusting frames slides on the fixing frame and are connected through a fastening screw, concave surfaces are formed in the side walls of one sides of the adjusting frames, adjusting handles are rotationally arranged on the adjusting frames on the same sides of the concave surfaces, and adjusting plates are movably hinged to the end of the adjusting handles. According to the invention, the real-time monitoring effect of the primary productivity of the subglacial water body in the freezing period can be obviously improved, and the measurement precision is improved.

The invention relates to a synergistic aquaculture method for resource-based treatment of bottom sludge in intensive cultivation ponds, and belongs to the technical field of aquaculture. The method of the invention includes the matching of cultured species, the resource treatment of sediment and the use of oxygenation facilities. According to the present invention, the ratio of omnivorous fish and filter-feeding fish is 5:1-5:2 for polyculture, and then adopts a specific method to process sediment resources during the breeding period, and finally adds specific oxygen-increasing facilities. These three links interact with each other to recycle the sediment nutrients, so as to achieve the goal of breeding efficiency. On the one hand, the original function of the sediment is restored, and the oxidation state is restored. On the other hand, the organic matter is oxidized to reduce the oxygen debt and the probability of disease outbreak. Moreover, the purpose of increasing production and income can be achieved without adding too much material.