37results about How to "Outbreak control" patented technology

The invention discloses an alga control method for a freshwater environment based on cultivation of barracudas and mullets, relating to a water treatment method. Aiming at solving the problem that algae can not be stably and thoroughly controlled in a eutrophic fresh water body, the method comprises the following steps: at least introducing one species of estuarine/marine fishes, such as barracudas and mullets which can only be propagated in sea water, and carrying out desalination processing before cultivation to enable the barracudas and the mullets to be adapted to a freshwater living environment, wherein the mesh size in the large water body ensures whether the cultivated fishes can escape; dividing or mixing according to different ages, carrying out culture in enclosure in girds by meshes, and simultaneously cultivating and propagating silver carps, bighead carps, other local fishes and local shellfish; and propagating local common aquatic plants. Thus, the fishes can be fed on the algae in a filter-feeding mode and simultaneously swallow detritus substances, thereby achieving the purpose of thoroughly purifying the water environment. By harvesting the cultivated and propagated aquatic organisms to remove nitrogen/phosphorus nutrients in water and humus in bed material from the water body, the method disclosed by the invention greatly improves the water quality of the cultivation water body.

The invention discloses a probe, a primer, a kit, and a detection method for detecting novel coronavirus SARS-CoV-2, and application, belongs to the technical field of molecular biology nucleic acid detection technology, and aims to solve problems in field detection, reduce pollution caused in detection process, increase virus RNA detection sensitivity and specificity. The invention provides the probe and the primer for detecting novel coronavirus SARS-CoV-2, and the kit containing the probe and the primer. The invention further provides a whole-course encapsulated procedure for exponential amplification from RNA (WEPEAR method). According to the invention, the detection sensitivity on N gene as low as 1ag (about 4 copies) is realized; the detection sensitivity on S gene as low as 1 copy is achieved, meanwhile, double genes of virus nucleic acid RNA based on RT-RPA (or RT-ERA) are detected at the same time so as to further improve the reliability of the detection result, and the kit can be used for field detection or household detection.

The invention discloses an aquaculture water quality balancing purification agent, which is prepared from the following raw materials by weight: 10-25 parts of tourmaline, 20-40 parts of montmorillonite, 5-10 parts of photosynthetic bacteria, 8-24 parts of actinomycetes, 40-60 parts of zeolite, 10-15 parts of bacillus subtilis, 10-15 parts of Streptococcus faecalis, 10-25 parts of Soybean molasses, 5-10 parts of sodium dihydrogen phosphate, 3-6 parts of tryptophan, 8-16 parts of sodium humate, 10-15 parts of sodium thiosulfate, and 10-20 parts of nitrobacteria. The aquaculture water quality balancing purification agent provided by the invention can reduce harmful substances in water, balance water nutrition, control outbreak of cyanobacteria, activate growth of beneficial algae, increase the dissolved oxygen of water, and improve the content of beneficial microorganisms.

The invention discloses biological algae control technology and application thereof in treating blue-green algae of the Lake Tai. The technology comprises the following steps: culturing oreochromis nilotica in a region with the blue-green algae, performing effective biological control on the blue-green algae in a water body, controlling overgrowth of the blue-green algae in the water body and inhibiting the explosion of cyanobacterial bloom by using the oreochromis nilotica to directly eat the blue-green algae, and effectively remove enriched nitrogen and phosphorus in the water body to achieve the aim of removing pollutant and purifying water quality by using the oreochromis nilotica to eat the blue-green algae. Through the technology, the explosion of blue-green high-risk region of local part of the Lake Tai can be effectively inhibited, and income increase of local fishermen and farmers is promoted. The technology and the application overcome the defects of the conventional physical, chemical and biological blue-green algae prevention and control, not only avoid pollution and biological risk, but also realize biological control on the blue-green algae.

The invention relates to the technical field of water environment and ecology restoration, in particular to immobilized preparation and application of algicidal bacterium microspheres. Bacterial cells in cultured algicidal bacterium liquid are separated and suspended in a beef extract peptone liquid culture medium 20-80% of original sample volume, polyvinyl alcohol and sodium alginate are selected as embedding bodies, a saturated boric acid solution of calcium chloride serves as a cross-linking agent, and immobilized cross-linking is performed at the temperature of 4 DEG C for 16-32 hours to prepare the algicidal bacterium microspheres. In addition, the invention discloses application of the algicidal bacterium microspheres in inhibiting of alga overgrowth, repeated adding of algicidal bacteria is avoided, and disposable addition of the algicidal bacteria is achieved. A nutrient substance adding mode is improved, the algicidal bacterium inhibiting effect of the algicidal bacteria is not affected, and water quality influence is also not brought. The preparation process is simple, the cost is low, large-scale popularization is easy, secondary pollution is not produced, and the algicidal bacterium microspheres provide an effective way for water bloom treatment.

The invention provides a Micropterus salmonides aquaculture system and aquaculture method. The system comprises a pond, a sewage collection well and a water circulation device; the bottom of the pondis connected with the sewage collection well through a sewage discharging pipe; the sewage collection well is composed of a main well and an auxiliary well; the auxiliary well is located at one side of the main well; the bottom of the auxiliary well is provided with a drain pipe; an isolation filter layer is arranged on the top of the main well; a manure outlet is arranged at the bottom of the main well; the manure outlet is connected with the auxiliary well through a manure outgoing pipe; the tail end of the manure outgoing pipe is higher than the manure outlet at the bottom of the main well;the outlet end of the sewage discharging pipe is connected with a gas exhaust pipe and an auxiliary water outgoing pipe, wherein the gas exhaust pipe and the auxiliary water outgoing pipe have upwards-facing openings; the air exhaust opening of the air exhaust pipe is higher than the isolation filter layer; one side of the lower end portion of the gas exhaust pipe is connected with a main water outgoing pipe; the auxiliary water outgoing pipe is communicated with the auxiliary well; a long pipe is inserted into the opening of the auxiliary water outgoing pipe; the water circulation device includes a pond water pipe, a sewage collection well water pump, a sewage collection well water pipe, a circulating water pump, a microbial treatment tank, and a return pipe; water in the pond and the sewage collection well is pumped to the microbial treatment tank; the water is treated; the treated water is returned to the pond; and therefore, the problem of the discharge of aquaculture wastewater can be solved.

The invention relates to a method for controlling blue-algae bloom outbreak of urban landscape water. The method comprises the following steps: for revetment and lake bottom hardened urban landscape water, building a hardened planting pool at a river bank, and planting emergent plants; planting submerged plants in a flowerpot, and sinking the flowerpot to the bottom of the water; and planting floating-leaved plants in the flowerpot, and placing on the bottom of the water. By planting the aquatic plants and ensuring the planting area and biomass of the aquatic plants, the excessive growth and breeding of algae in the water are inhibited, and the blue-algae bloom can be inhibited and eliminated. When the blue-algae bloom outbreak is effectively controlled, the clear state of the water can be maintained, the landscape effect of the water is improved, a good living space and habitat can be provided for bottom inhabiting organisms, a high-density zooplankton colony is formed, and the biological diversity is improved. The potted aquatic plants are easy to replace and manage, and the method has the advantages of simplicity in operation and maintenance, low investment and low energy consumption.

The invention discloses a special aquaculture cleaning agent which is prepared from, by weight parts, 15-20 parts of cordate houttuynia, 0.3-0.5 parts of vanillin, 0.3-0.5 parts of thymol, 10-20 parts of diatomaceous earth, 20-30 parts of fan shell powder, 10-20 parts of modified flax powder, 35-40 parts of kaolin, 5-10 parts of activated carbon fiber, 17-20 parts of zeolite and 13-19 parts of freeze-dried duckweed powder. The special aquaculture cleaning agent can effectively remove dissolved pollutants in the aquatic water body, balance water body nutrition, improve water quality and water body transparency, control algae burst, improve water body dissolved oxygen, improve fish activity, further improve fish flesh quality, improve content of beneficial microorganisms in the water body, promote microecological balance, achieve stabilization of the aquatic water body and disease control, reduce aquaculture pollution, and improve quality and safety of special aquaculture aquatic products.

The invention discloses a water purifying agent for aquaculture. The water purifying agent comprises silicon powder, calcium chloride, carbon black, sodium silicate, diatomite, tender leaves of syzygium jambos, tender leaves of tilia amurensis and branches of weeping willow. The water purifying agent has the advantages that by the pretreatment of raw materials and the coordination of various components, the water purifying agent can effectively remove the dissolved pollutants in culture water, balance water nutrition, improve water quality, increase water transparency, control alga outbreak, increase the dissolved oxygen of the water, increase the activity of fish so as to improve fish meat quality, increase the content of beneficial microorganisms in the water, promote micro-ecological balance, stabilize the culture water, prevent and treat diseases, reduce culture pollution and increase the quality and safety of aquatic products.

The invention discloses a device for reducing urban riverway spray burst. The device comprises riverway fixing rods which are symmetrically arranged along a riverway, wherein roadbed fixing rods are arranged in parallel on the outer sides of the riverway fixing rods; a plurality of cultivation units are mounted on the riverway fixing rods; the cultivation units comprise cultivation net curtains and riverway slide bars I perpendicular to the riverway fixing rods; the left and right sides of the cultivation net curtains are connected with the riverway slide bars I; the front and rear ends of theriverway slide bars I are connected with roadbed slide bars I, so that the cultivation units are moved from the left to right along the riverway; a plurality of flowerpots are arranged on the cultivation net curtains; and a plurality of small holes are formed in the bottoms of the flowerpots. The device disclosed by the invention is long in use duration, high in control efficiency and obvious ineconomic and ecological benefits, has excellent social benefits and accords with a mainstream development direction of the ecological model.

The invention provides a method for restraining the formation and growth of spirogyra on water surfaces. The method is characterized by comprising the following steps: when the daylight intensity is 2500-5000 lux, and water temperature is 7-25 DEG C, chlorine dioxide with the concentration of 2.3-4.5 mg/L is splashed or put on the water surfaces of water bodies of ponds, ditches, or lakes, in which a large amount of spirogyra grows, for 2-3 times with the time interval of 5 minutes, so as to enable the chlorine dioxide to be in full contact with the spirogyra on the water surfaces for 10-15 minutes, the structure of the spirogyra is damaged, and finally, the spirogyra degrades automatically until disappearing. Therefore, the purposes of restraining the formation and growth of spirogyra on the water surfaces are achieved, and that a large amount of spirogyra breeds is controlled. The method provided by the invention is suitable for restraining the formation and growth of spirogyra on the water surfaces of water bodies of the ponds, the ditches, or the lakes, and controlling the condition that a large amount of spirogyra breeds.

A method for controlling algae in a freshwater pond by cultivating striped mullets relates to a method for treating water. Aiming at the problem of frequent blooming of blue green algae in a eutrophic pond aquiculture water body, the striped mullets which belong to river mouth marine fishes and can only be reproduced in sea water are introduced to filter-feed on the algae and swallow detritus substances, so that the aim of continuously and thoroughly purifying a freshwater pond aquiculture environment is fulfilled. The method is characterized by comprising the following steps of: performing gradual desalting treatment on the striped mullets before cultivation to make the striped mullets adapt to the living environment of freshwater, wherein the age of each striped mullet is less than 24 months; transferring the striped mullets into a pond required to be purified by a keeping-alive transportation method; cultivating the striped mullets in the eutrophic freshwater pond; and catching thelarge striped mullets and keeping the small striped mullets year by year according to the density of the striped mullets in a water environment. By the method for controlling the algae in the freshwater pond by cultivating the striped mullets, the content of the algae in the eutrophic freshwater pond aquiculture water body is effectively reduced, nitrogen and phosphorus nutritive salts in the water and humus in a bottom material are brought out of the water body by harvesting reproduced striped mullets, the quality of the water body is greatly improved, and algae blooming is controlled.

The invention discloses algicidal bacteria, a screening method and application. The strain of the Paenibacillus sp. XXG is currently preserved in the China General Microbiological Culture Collection Center (CGMCC) of the Institute of Microbiology, Chinese Academy of Sciences, and the preservation number of the strain is CGMCC NO. The preservation time is April 1, 2019, and the preservation numberis CGMCC (China General Microbiological Culture Collection Center) No. 17503. The algicidal bacteria are screened from soil, and the application of the algicidal bacteria in removing microcystis aeruginosa in a water system is provided. The screened algicidal bacteria XXG have the advantages of good ecological adaptability, high safety, low extraction cost, simple and feasible method and the like,are suitable for natural water system conditions, and can effectively control the outbreak of blue-green algae.

The invention belongs to the technical field of livestock breeding, and discloses fast-grown chicken complete feed, and a preparation method and application thereof. The compound feed comprises the following raw materials: corn flour, fish meal, soybean meal, soybean oil, calcium hydrophosphate, mountain flour, bentonite, trace elements, table salt, vitamins and compound Chinese herbal medicines, wherein the compound Chinese herbal medicines adopt ramulus uncariae cum uncis, herba ecliptae and sanguisorba radix. The fast-grown chicken complete feed uses the compound Chinese herbal medicines to lower the burst rate of Eimeria, reduce the hazard of enteritis, lower a chicken flock death rate, improve a finished product chicken market-appearing rate and shorten a breeding period, a livestock farm obtains a higher profit, in addition, utilization of medicines can be reduced, and the fast-grown chicken complete feed conforms to the requirements of healthy culture and green culture.

The invention discloses a method for controlling algae in eutrophic freshwater body by cultivating Xenocyprinae fishes, relating to a water treatment method. Aiming at the problem that blue-green algae frequently outbreaks in the eutrophic freshwater body during pond cultivation, Xenocyprinae fishes only propagating in a mountain stream running water environment are introduced for eating algae and detritus matters at the same time so as to achieve the purpose of thoroughly purifying the cultivating environment in the eutrophic freshwater body. The method is characterized in that the Xenocyprinae fishes are cultivated in the eutrophic freshwater body; before cultivation, fingerlings are specified to be within 24 months old and are transferred to the pond to be purified by using a keep-alive transportation method, and the big Xenocyprinae fishes are caught and small ones are reserved yearly according to the density of the Xenocyprinae fishes cultivated in the water environment. By use of the method, the algae content in the eutrophic freshwater body for cultivating can be effectively reduced, and nitrogen and phosphorus nutritive salts in the water and humus in the bottom mateiral are brought out of the water body by harvesting the proliferous Xenocyprinae fishes, so that the quality of the water body for cultivating is greatly improved, and the algae outbreak is controlled.

The invention belongs to the field of aquaculture, and relates to a preventing and controlling method of a shrimp infectious disease by utilizing rachycentron canadum. The method comprises the following steps: throwing prawn shrimp seeds into sea water with salinity between 2 and 33, wherein 30,000 to 100,000 rachycentron canadum is thrown each Mu; and throwing rachycentron canadum which is between 90 and 110g per fish when each prawn is between 0.3 and 0.7g, wherein 50 rachycentron canadum is thrown in each mu. Massive experiments prove that 90-110g/fish ingests the rachycentron canadum ill or dead prawn in the shrimp culturing pool, and the probability that healthy prawn is ingested is very small due to the habits of the prawn. The characteristic of the rachycentron canadum is used for solving the problem of low survival rate of cultured prawn caused by healthy prawn ingestion.

The invention discloses an ecological filter bed for river regulation. The ecological filter bed comprises a slope body, the slope body comprises a filter chamber (5) and an aeration chamber (8) arranged below the filter chamber, the filter chamber and the aeration chamber are separated through a first partition plate (13), a first filter layer (1), a second filter layer (2), a third filter layer (3) and a fourth filter layer (4) are arranged in the filter chamber, the first filter layer and the second filter layer are connected through a second partition plate (10), the second filter layer and the third filter layer are connected through a third partition plate (11), and the third filter layer and the fourth filter layer are connected through a fourth partition plate (12).