169 results about "Sargassaceae" patented technology

A method and system for the inland aquaculture of marine species using water from a saline aquifer having a heavy metals content within the acceptable limits of the EPA guidelines for drinking water. The aquifer is preferably the Coconino aquifer located in Arizona and New Mexico. The system can be used to culture microalgae, macroalgae, fish, shrimp and many other marine species. Nutrients and fertilizers can be added to the water to optimize culture conditions for particular species. Useful products can be isolated from the marine species or the cultured marine species can be harvested as useful products themselves.

An three-dimensional intensive culture technique of shrimps, crabs and shellfish in a seawater pond comprises the following steps: the pond is cleaned up before stocking, the bottom of the pond is solarized, a central canal and a circular canal are excavated, and feed water is disinfected and sterilized with medicines; fresh seawater is fed, the water quality culture, fertilization and algae culture are carried out, a lifting device for a swimming crab breeding cage is prepared, and lines are parallel set up at the two ends of the culture pond with each line spaced 50cm; and 30cm higher than the surface of the water, the cage is suspended every 50cm, the inside of the cage is provided with fine sand, the outside of the cage is sheathed with a plastic netting, benthonic seashells are put into the cage for the first, and the stocking density is 30 benthonic seashells per mu, then the stocking of prawns is carried out, and the stocking density is 5000 prawns per mu. By adopting the three-dimensional multi-species hybrid culture technique of shrimps, crabs and shellfish in a seawater pond, the water layers of the stocking ponds can be fully utilized, the utilization rates of each water layer of the stocking ponds, stocking devices and manpower are further improved, the water purification capacity of the seashell can be fully utilized, and the swimming crabs are suspended in a cage, thus avoiding cannibalism and catching and killing the shrimps and seashells in the same pound; Furthermore, the three-dimensional intensive culture technique provides adhesion and sheltering objects for prawns, and achieves the purposes of improving yield and increasing economic benefits.

The invention relates to a cultivating method of a sinocyclocheilus grahami seedling, belonging to the technical field of fish culture. The cultivating method comprises the steps of the cultivation of fish fries growing mouths in rich water, artificial cultivation of fish fries, the rearing of fish fries at middle and rear stages and pest control. In the cultivation of fish fries growing mouths in rich water, a temporarily-cultivating pond is arranged in a tunnel, bait for fish fries growing mouths is chlamydomonas and rotatoria cultivated in rich water and the fish fries are cultivated at water temperature of 15 DEG C for 10-12 days. In the artificial cultivation of fish fries, the fish fries are cultivated by eel powder feed with the protein content of 40 percent for 40 days. The feed in the fish fries at middle and rear stages is carp crushed feed with the protein content of 39 percent. In the pest control, the water quality and the conditions of fish bodies are detected every three days, 50-80ml / mu of povidone iodine for controlling bacterial infection and 50-50ml / mu of rotatoria one-time removal (ammonium ethylene-bis-dithiocarbamate) for controlling balantidiasis are splashed every 15 days. The invention can effectively improve the survival rate and the growth speed of inocyclocheilus grahami seedlings, is simple and convenient, and is beneficial to being popularized and generalized. Bacterial.

The invention discloses a method for planting salvia officinalis in hardness adherance, which belongs to the technical field of algae propagation. The method comprises the following steps of: pre-processing the adherance, preparing a seedling collection pond, preparing to plant algae, collecting seedlings, cultivating young seedlings, putting in a sea area and managing on the sea. According to the method disclosed by the invention, the salvia officinalis are directly planted on artificial reefs, stones or cement components, can be firmly combined on the surfaces of the artificial reefs, the stones or the cement components through adhesion accentuation trainings in stages and then can be put into sea water in a appropriate time, new branches of the salvia officinalis can be grown on the adherance year by year, the problems that the salvia officinalis are in resource exhaustion due to man-made damage and the year-to-year propagation for maintaining algae resources in the sea area are solved, the method plays a great role in environment modification, resource recovery and the like, and simultaneously, the operation is simple and convenient.

The invention discloses bacillus subtilis and an application thereof to aquaculture, and belongs to the technical field of aquatic microorganisms. The bacillus subtilis NC108 is preserved on April 10, 2017 with the preservation number being CGMCC NO: 14010 at China General Microbiological Culture Collection Center, which is located at No.3 No.1 yard Beichenxilu Chaoyang District, Beijing, andthe preservation is required by Qingdao Agricultural University. The bacillus subtilis NC108 can fast efficiently reduce the content of ammoniacal nitrogen and nitrite in the water body, degrades alga, and has certain antagonism on the skin ulcer syndrome of apostichopus japonicas. The consumption of chemical pesticides and accumulation of chemical pesticides in the water body are reduces, so thatenvironmental pollution is prevented. The bacillus subtilis NC108 is beneficial for improving the quality and yield of aquatic animals and has remarkable economic benefit and social benefit.

The invention discloses a method for ecologically cultivating larva of blue crab in a pond. The traditional method for cultivating larva of blue crab has low survival rate of larva seed; in order to improve the survival rate of the offspring seed, firstly the survival rate of the crab seed from strengthened cultivation to spawning season is necessarily improved, which is taken as precondition forimproving survival rate of crab seed; and then the rational and scientific ecologic cultivation is realized to improve the survival rate of crab seed and meet the need of mass production of blue crab. The method comprises following steps: using bound seed crab rock lobster; cutting single-side eye handle, using flowing water stimulation method to improve the survival rate of broody crab to 70-80%; then propagating natural alga and using biological agent comprising photosynthetic bacteria to maintain excellent micro-ecological environment of pond, the propagation of bacteria is restrained, thetransparency is reduced, the inter-killing of the crab larvae is reduced, the survival rate of zoea changing as megalopa is improved. The method has quick growing speed of larvae, regular growth and larva survival rate reaching 30%.

The invention discloses an excessive reproduction control technology of benthic macro-algae in an apostichopus japonicas culturing pond. The excessive reproduction of the benthic macro-algae in the apostichopus japonicas culturing pond can cause severe damage to the normal growth of the apostichopus japonicas. The excessive reproduction and massive death of the macro-algae can breed large amounts of pathogenic microorganisms such as bacteria, viruses and the like and consume much of the oxygen in the water, so as to cause the famine of the dissolved oxygen in the bottom water body, reduce the immunity of the apostichopus japonicas, and cause the disease outbreak and the like. Aiming at the problem of the traditional control technology and method of the benthic macro-algae, the invention provides three technical methods to control the damage caused by the excessive reproduction of the benthic macro-algae in the apostichopus japonicas culturing pond, wherein the first method comprises the step of compositely culturing the macro-algae of asparagus so as to control the excessive reproduction of the benthic macro-algae in a light shading manner; the second method comprises the step of splashing the mud with good suspension property so as to control the reproduction of the benthic macro-algae in a manner of reducing the transparency of the culturing water; and the third method comprises the step of by utilizing a shading net, adjusting the illumination so as to control the reproduction of the benthic harmful algae. The invention saves the resource cost, solves the key problem in the apostichopus japonicas culturing technology, and has the advantage of long-term market development and economic investment potential.

The invention relates to a water treatment technique, in particular to a method for biological resource recovery of industrial marine fish aquaculture wastewater. In the method, macroscopic algae, filter feeders, sediment animals and carnivorous fishes are cultured in the industrial marine fish aquaculture wastewater of which the water temperature is between 4 and 27 DEG C to form a biological filter to treat the wastewater discharged by industrial fish aquaculture, wherein the macroscopic algae are warm water macroscopic algae and cold water macroscopic algae; the filter feeders are filtering seashells and fishes, the seashells comprise one or more of oyster, sea-mussel and scallop, and the filtering fishes are barracudas; the carnivorous fishes comprise one or more of weever, flounder and black marine rock fish; and the sediment animals are Stichopus japonicus Selenka. In the method, based on the ecology principle, the macroscopic algae, the filter feeders, the sediment animals and the carnivorous fishes are combined together, and the macroscopic algae, the filter feeders, the sediment animals and the carnivorous fishes coordinate with one another and serve as the biological filter to comprehensively treat the wastewater discharged by the industrial fish aquaculture.

The invention discloses a pool polyculture method for tor brevifilis, flying carps and bighead carps. The pool polyculture method comprises the following steps of selecting a polyculture pool; neatening the polyculture pool; fertilization: applying fermented chicken droppings as a base fertilizer, topdressing EM bacterium and unicellular alga activin after 3-4 days, and adding urea and calcium superphosphate; putting: in January, disinfecting with quick lime and putting flying carps and bighead carps after 12-18 days, wherein the density of the flying carps is 90-110 fishes / mu and the density of the bighead carps is 45-55 fishes / mu; in the first ten days of June, putting the tor brevifilis, the density of the tor brevifilis is 3200-3700 fishes / mu; feeding and management: feeding the granulated feed accounting for 4-7wt% of the weight of the tor brevifilis; water quality management: changing and adding water and using a microbial preparation in the feeding process; disease control: disinfecting with quick lime at intervals of 15 days; from the start of July, killing pests by adopting o, o-dimethyl (2, 2, 2-trichlorine-1-hydroxy ethyl) phosphonate, and adding allicin and isatis root in the fed feed; daily management.

The invention discloses biological fish manure for aquaculture, which mainly comprises a base fertilizer, a deodorant, an activator and a carrier. After the biological fish manure is applied for 5-7 days, plankton mainly containing yellow green and drab brown alga and ovigerous females in a culturing water body are easily digested and absorbed by breeding animals, the feeding amount of the manure is reduced, and the culturing cost is saved. During the culturing, water quality is fertile, fresh, soft and clear, and the breeding animals are low in morbidity, high in rate of survival, and beefy and tender in meat quality. According to the biological fish manure, the utilization problem of beer brewing wastes is solved, the healthy and sustainable development of green aquaculture industry is promoted, the recycling economy, namely wastes are turned to be profitable, and the social and economic benefits are good.

The invention discloses an ecological polyculture method of river cabs, freshwater shrimps and rhodeus sinensis, wherein the river cabs, the freshwater shrimps and the rhodeus sinensis are cultured in a mixed mode. The method includes the steps that stocking of crab species is conducted in the middle of March, the specification of young crabs ranges from 40 per jin to 50 per jin, and the stocking density ranges from 600 per mu to 800 per mu; the freshwater shrimps serve as shrimp species, a mode of mixed breeding for two times in one year is adopted, the first breeding is conducted in the middle of February, the stocking specification is that the size of the fresh shrimps ranges from 2 cm to 3 cm, the stocking density ranges from 15 kg / mu to 25 kg / mu, the second breeding is conducted in the end of June, the stocking specification is that the size of the fresh shrimps ranges from 0.7 cm to 1 cm, and the stocking density ranges from 50,000 per mu to 60,000 per mu; stocking of the rhodeus sinensis is conducted in February, the stocking density ranges from 350 per mu to 450 per mu, the male-female ratio ranges from 1:1.1 to 1:1.2, and meanwhile matched stocking of 200-300 anodonta woodianas is conducted. According to the method, the ecological complementarity of the river cabs, the freshwater shrimps and the rhodeus sinensis is adopted to conduct polyculture, the river cabs are mainly bred, the rhodeus sinensis is mainly used for removing residual feeds, the baits are fully utilized, the algae are the objects devoured by the river cabs and the freshwater shrimps, and the rhodeus sinensis is bred in a mixed mode to control the blue-green algae outbreak in the river cab pool.

The invention discloses a method for constructing artificial algal crusts by utilizing mixed algae. The method comprises the following steps of: selecting sufficiently developed algal crusts on the desert, collecting the algal crusts, and grinding the algal crusts after air-drying the algal crusts; sieving bare sand with a 0.2mm sieve, then adding 1 liter of BG11 liquid culture medium to 100g of bare sand, and collecting the algae together with the grains of sand fixed on the algae three weeks later, wherein the inoculum size is 50g dry soil per liter of culture medium, the culture temperature is the room temperature, the illumination intensity is 4000lux, and in the cultured mixed algae, the dominant species are filamentous algae which are mainly microcoleus, lyngbya and phormidium and account for 80% of the total biomass, and species such as oscillatoria, chlorococcum humicola, chlorella, chlamydomonas, Navicula, hantzschia and the like account for 20% of the total biomass; grindingthe collected algae into alga powder after air-drying the collected algae, and putting the alga powder in a refrigerator at minus 20 DEG C; and carrying out inoculation on the bare sand when the soiltemperature is 20 DEG C, wherein the inoculum size is 80g.m<-2>, and the moisture applied daily is 3L.m<-2>. The method successfully avoids the problems of purification and separation of the algae, and has wide applicability.

The invention relates to an artificial breeding method for Stichopus japonicus, belonging to the field of sea cucumber breeding. The research reports on the artificial breeding of the sea cucumber at home and abroad are very few at present and the artificial breeding technique lacks for systematic information. The invention systematically introduces notable problems of all links from the aspects of breeding facilities, water quality conditions, algae seed selection, bait cultivation and the like. Especially for the fishing of parent sea cucumbers, undamaged individuals with body length being above 20cm, body weight being above 250g and gonad indexes being above 10 percent are required to be selected as the parent sea cucumbers; and for larva breeding, breeding plants mostly adopt a shade-drying running water stimulation method to induce spawning, and the fed baits are mainly cultivated algae which comprise Chaetoceros muelleri, Phaeodactylum tricomutum, Nitzschia closterium Minutissima and the like. By controlling breeding density and well doing all links such as spawning, hatching and larva culture, a good effect is achieved.

The invention discloses a mixed culture method of golden pomfret. According to the mixed culture method, based on conventional culture of golden pomfret, the golden pomfret is mixed with siganid for culture; through the technical measures of sea area selection, net cage preparation and fingerling stocking, a new mixed culture mode is adopted; by utilizing the characteristic that the siganid likes algae, the siganid eats all algae attached to the netting, the problem of mesh blocking by algae is solved, and the manpower and material resources for cleaning the netting are saved; the siganid in mixed culture mainly eats the algae on the netting, and only a little feed is needed; and therefore, the culture cost is very low, and the economic benefits of the culture are increased. Meanwhile, by utilizing the characteristic that the body fluid of the siganid contains antagonistic component against melon seed worms, after the mixed culture of siganid and golden pomfret, the problem that the golden pomfret is susceptible to the melon seed worms is solved, and the harm of the melon seed worms against golden pomfret is restricted by use of biological factor, thereby killing two birds with one stone.

The invention discloses an alga cultivation device with indoor controllable cultivation conditions. A bottom plate is arranged at the bottom of an annular tank; a bearing is vertically connected with a rotating shaft; a rotating transverse arm is horizontally connected to the top of the rotating shaft; the rotating shaft is connected with an adjustable motor; the adjustable motor is connected with a speed regulator through a connection line; thrust blades are respectively vertically connected with two ends of the rotating transverse arm; the thrust blades are arranged inside a tank chamber of the annular tank; light sources are symmetrically arranged on two sides of the annular tank. The alga cultivation device has the advantages that temperature control and light control are achieved, and hydrodynamic condition experiments under different cultivation conditions are provided. In the alga cultivation process, the blades of the device rotate in a uniform speed, so that the problems that the flow speed is not stable, not uniform and the like are effectively solved.

The invention discloses a method for controlling the growth of scenic water algae by using emergent and submerged aquatic plants. The emergent aquatic plant is cyperus alternifolius, and the submerged aquatic plant is green myriophyllum aquaticum. In the method, the cyperus alternifolius and the green myriophyllum aquaticum are planted in cultivated layers of the scenic water in a checkerboard type composite plantation mode, namely the green myriophyllum aquaticum is distributively planted in the cultivated layers in the checkerboard type, wherein the spacing of the green myriophyllum aquaticum is 5cm, the cyperus alternifolius is compositely planted with the green myriophyllum aquaticum every three plants of green myriophyllum aquaticum, wherein the spacing of the cyperus alternifolius is 20cm, the depth of the cultivated layers in the scenic water is less than 0.5m, and the composite plantation area is not less than 30 percent of the water area. The method has the advantages of simpleness, practicability, simple and convenient operation, and capacities of avoiding ecological risks, suppressing the overgrowth of the regenerated water algae and guaranteeing the safety and appreciation of an aquatic environment. The submerged and emergent aquatic plants are easily harvested and coact to produce allelochemicals capable of suppressing the algae. Therefore, the algae hardly grow in the scenic water, and the treatment cost is low.

The invention provides Ye pseudoalteromonas. The classification and name of the Ye pseudoalteromonas is Pseudoalteromonaselyakovii, the name of the bacterial strain is BN-C-11, the bacterial strain is preserved by China General Microbiological Culture Collection Center (CGMCC) on Nov. 11th, 2016, and the preservation number is CGMCCNo. 13265. The invention also provides an application method of the Ye pseudoalteromonas, and is used for producing fungicide for controlling red tide algae. Through biological enzymes generated by fermentation products of the Ye pseudoalteromonas in ponds, reservoirs and sea areas, inundation of the red tide algae can be controlled, and a part of active substances can absorb illumination wave bands necessary for algae growth, so that inundated growth of the red tide algae is controlled, normal growth of aquatic organisms is not influenced, the breeding density is improved, a breeding environment is improved, and the purpose of improving the cultivation yield of the aquatic organisms is reached.

The invention discloses a device and method for sargassaceae seaweed germplasm preservation. The device includes a culturing system, a cycling filtration system, a spraying system and an illumination system; the technology and equipment required by the culturing system are simple, the investment is small, the production cost is low, a culturing device and a long-term culturing method are provided for living-body germplasm preservation and eco-physiological characteristic study of sargassaceae seaweed, and according to the culturing device and the long-term culturing method, observation can be conducted at any time, and experimental operation is simple and easy to implement. When the germplasm preservation device is used for sargassaceae seaweed culturing, the dry exposure state under the natural ecological environment is simulated, the duration of contact between the seaweed and air is long, the photosynthetic efficiency is high, and the seaweed more easily grows. When the method is used for seaweed germplasm preservation, epiphytic algae is little, the stress resistance is good, and the seaweed germplasm can be preserved in a room for a long time; according to the method, management in the seaweed germplasm preservation process is convenient, little water is used, sea water is recycled, and more than 80% of water can be saved.

The invention provides a thalassiosira pseudonana Guh005 with the preservation number of CCTCC NO.M2015044. A specific nutrient solution formula is adopted for carrying out three-stage amplification culture on the thalassiosira pseudonana and is used for feeding after Mercenaria mercenaria D-shaped planula larva metamorphosis is finished for 36 hours, and feeding effect is the same as the conventional shell-fish bait. Under the culture by virtue of the nutrient solution formula provided by the invention, outdoor quick three-stage expanding propagation can be carried out on the marine diatom under the condition that illumination intensity is 2000-8000Lux, and especially the marine diatom can be a priority selection of a bait for breeding Mercenaria mercenaria larvae in rainy days.

The invention discloses a nuttallia olivacea larva large-scale breeding method, relates to the technical field of aquaculture, and particularly belongs to the nuttallia olivacea larva large-scale breeding method. The method is characterized by comprising the following steps of four-grade bait preparation, wherein a first-stage unicellular alga species starts to be cultivated from December to January in winter or 3-4 months before spawning of parent shellfish, second-stage alga species is prepared from February to March in spring, a three-stage alga solution is produced from March to May in spring, and large-scale unicellular bait is produced in a pond from April to August in spring and summer; parent shellfish collection and spawning; fertilized egg hatching; larva breeding. The method hasthe advantages that the method is not limited by natural conditions, the yield is high, and large-scale benefits are remarkable.

The invention discloses a microcystis aeruginosa research device which comprises a water tank, a motor and a lighting system, wherein the water tank is in the shape of an annular column with an upward opening; the motor is arranged in the center of circle of the water tank; an output shaft of the motor is provided with vertical supporting beams; the top ends of the supporting beams are provided with horizontal suspension arm beams; water pushing sheets are arranged below the suspension arm beams and extend into the water tank; and the lighting system is arranged at the periphery of the water tank. The device has the characteristic that a water body has basically consistent flow velocity during an experiment.

The invention relates to the aquaculture technique, which in detail is an ecological cultivating method for shallow sea fishes. In china northern fish cultivating areas, thermostable and large-scale algae such as asparagus are mixed cultivated to improve the culturing environment. The invention makes full use of asparagus to adsorb nitrogen and phosphorous to reduce water pollution; and at the same, the asparagus is an important economic algae, for which the economic benefit is increased. In conclusion, the invention possesses both ecological benefit and economic benefit, and is especially suitable for northern parts in China.

The invention discloses a synergetic control-algae method of silver carp, variegated carp, Cladophora and transparent algae involving water disposal method, which comprises the following steps: raising silver carp and variegated carp in eutrophication water body; constructing floating net cage; attached growing Cladophora on the nylon twine web of floating net cage; placing transparent algae in floating net cage. This invention resolve the water quality deteriorate problem because overgrowth of algae. The average clearance of phosphoric is at 70-73% with algae at 73.5-75.5%, oligon at 67.5-70.5%.

The invention discloses a plant growth regulator for promoting the growth of water plants and beneficial algae in shrimp and crab ponds and relates to the field of aquaculture. The water plants comprise waterweed. The beneficial algae comprise chlorella pyrenoidosa and scenedesmus obliquus. The plant growth regulator is a mixture comprising any one or more of diethyl aminoethyl hexanoate, compound nitrophenol, gibberellin and brassinolide. The use amount of the plant growth regulator used to promote the growth of the beneficial algae is in a range of 0.01 to 1 mg / L, and the use amount of the plant growth regulator for promoting the growth of the waterweed is in a range of 0.001 to 0.06 mg / L. The plant growth regulator can effectively promote the increasing of fresh weight of the waterweed, plant height and the growth of fibril, can observably promote the growth of chlorella pyrenoidosa and scenedesmus obliquus, can increase the density of chlorella pyrenoidosa and scenedesmus obliquus in valid time, and can improve the survival rate and growth rate of juvenile fish, shrimps and crabs.

The invention relates to a method for mixed breeding of adult crabs and young carbs in a paddy field. A three-dimensional ecospecific breeding mode integrally combining rice, 1st crab species, young crabs, and soybeans is adopted. The method comprises the following steps: (1) selecting the paddy field; (2) selecting the 1st crab species and the young crabs, and respectively performing temporary culture; (3) fertilizing the paddy field; (4) digging an annular groove, a water inlet and a water outlet in the paddy field; (5) culturing rice crops and soybean crops; (6) respectively disinfecting the paddy field, the 1st crab specifies and the young crabs; (7) breeding the 1st crab specifies; and (8) breeding the young crabs. According to the method disclosed by the invention, weeds and insectsin the paddy field, and plankton and benthos in water are used for breeding the river crabs, and the quantity of the weeds, filamentous algae and pest in the paddy field can be controlled, so that themethod provides an ample space for growth of the rice crops and the yield of the rice crops is increased.

The invention relates to a method for preparing Enteromorpha prolifera extract for prohibiting red tide alga and the application thereof. And the preparing method: leaching Enteromorpha linza plants or their crushed matters with water, alcohol or acetone, aether, and chloroform or methanol, and concentrating the obtained extract by rotary evaporation, and throwing the concentrated extract into a to-be-processed water body to prohibit growth of red tide alga in the water body. And the extract of the Enteromorpha linza extract can be used to prohibit the red tide alga growing. Ordinarily, per kg Enteromorpha linza is leached with 30-50 L sterilized sea water for 1-3 days and the obtained Enteromorpha linza extract is applied to the to-be-processed water body, and 10-100 ml extract is thrown into per L water body and the prohibition rate is above 98%. And the invention can effectively prohibit harmful marine red tide alga.

The invention discloses rhodobacter capsulatus and an application thereof. The invention provides rhodobacter capsulatus BN-W-6 which has a collection number of CGMCC No.8311 and belongs to photosynthetic bacteria. The rhodobacter capsulatus is fermented by adding an energy source after enlargement cultivation to obtain fermentation products including chlorophyll a, carotenoid, ketone-carotenoid, hydrogenase, catalase and the like. Biological enzymes generated by the fermentation products of the rhodobacter capsulatus in a pond can ensure that macroscopic algae are gradually decomposed, the products including chlorophyll a, carotenoid and the like can absorb illumination wavebands necessary for growth of the macroscopic algae to make the macroscopic algae shrunk and agglomerated until death, and the dead macroscopic algae can not influence bottom matters, thereby achieving the aims of controlling rampant growth of algae and not influencing the normal growth of sea cucumbers. The fermentation broth of the rhodobacter capsulatus provided by the invention can be used for inhibiting and removing the macroscopic algae, so that the culture density is increased, the culture environment is improved, and the aim of improving the pond culture output of aquatic organisms is achieved.

A method for controlling algae in a freshwater pond by cultivating 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 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 thatthe aim of continuously and thoroughly purifying the environment of pond aquiculture water is fulfilled. The method is characterized by comprising the following steps of: performing gradual desaltingtreatment on the mullets before cultivation to make the mullets adapt to the living environment of freshwater, wherein the age of each mullet is less than 24 months; transferring the mullets into a pond required to be purified by a keeping-alive transportation method; cultivating the mullets in the eutrophic pond water body; and catching the large mullets and keeping the small mullets year by year according to the density of the mullets in the environment of pond water. By the method for controlling the algae in the freshwater pond by cultivating the mullets, the content of the algae in the eutrophic pond aquiculture water body can be 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 mullets, the quality of the water body is greatly improved, and algae blooming is controlled.

The invention relates to a microorganism deodorant with a brown alga extract, Houttuynia cordata and mint. The microorganism deodorant is prepared from a microorganism bacteria agent, a plant extract, an alga extract, biological active enzyme and water, wherein the microorganism bacteria agent contains the following components in percentage by mass: 15%-35% of lactobacillus plantarum, 15%-35% of beer yeast, 2%-6% of bifidobacterium, 2%-6% of nitrifying bacteria and 3%-5% of azotobacter chroococcum; the plant extract contains the following components in percentage by mass: 4%-15% of a lemon extract, 4%-15% of a Houttuynia cordata extract and 3%-8% of a mint extract; and the alga extract is 0.5%-2.5% of a brown alga wall-broken extract. The microorganism deodorant is low in cost, high in efficiency, wide in application range and very practical in specific production, and the garbage disposal efficiency is greatly improved.