125results about How to "Reduce water changes" patented technology

The invention provides a rapid cultivation device and method of a daphnia magna laboratory and belongs to the field of cultivation of zooplankter. The rapid cultivation device comprises supports, base plates, water bath tanks, a water storage tank, cultivation cups, heating rods, thermometers, turbulence pumps, a fluorescent lamp and a time controller. Each base plate is arranged at the bottom of the corresponding support. The storage water tank is arranged on the base plate of the bottommost support. The water bath tanks are arranged on the base plates of the two upper supports. One thermometer, one turbulence pump and two heating rods are arranged in the water storage tank. Each water bath tank is provided with one thermometer, two heating rods and six cultivation cups. The fluorescent lamp is located above the portion deviating from the center of the support and is parallel to the support. The time controller is in contact with the fluorescent lamp. The rapid cultivation device is easy and convenient to operate, high in operability, easy to set up and free of a complicated device structure. Daphnia magna cultivated through the rapid cultivation device is rapid in reproduction and large in quantity, the life condition of the daphnia magna is stable, and the individual difference of the daphnia magna is small, so that results of toxic tests of fleas are stable and reliable, the test quality is guaranteed, and enough test materials can be provided for tests such as removal of zooplankter pollution to water in the industry of water treatment at the same time.

The invention relates to an intensive ecological culture method for trachidermus fasciatus. The intensive ecological culture method specifically includes the steps of culture pond preparation, biological film fish nest distribution, biological film culture, pond ecosystem establishment and pond ecosystem maintenance. The intensive ecological culture method for the trachidermus fasciatus overcomes the shortcomings of low trachidermus fasciatus culture density, high death rate, low growth speed, waste of water, ponds and manpower resources and the like in existing trachidermus fasciatus culture.

The invention relates to the field of aquatic animal breeding, and provides an aquatic animal breeding system. The aquatic animal breeding system comprises a breeding pond, a settling pond, a filter pond and a water pump. The bottom of the breeding pond is inclined from the periphery to the center. The breeding pond and the settling pond are connected through a pollution collecting pipe. The end, connected with the breeding pond, of the pollution collecting pipe is located in the center of the bottom of the breeding pond. The end, connected with the settling pond, of the pollution collecting pipe is vertically arranged. One or more pollution absorption grooves are formed in the end, connected with the breeding pond, of the pollution collecting pipe. A partition plate is arranged between the settling pond and the filter pond. The aquatic animal breeding system has the advantages that water pressure is utilized, the effect of pollution removal and separation of the breeding pond can be achieved by opening the water pump, the purpose of cleaning the bottom of the pond even in the breeding cycle can be achieved, breeding pollutant residues in the pond are reduced, the water changing frequency is reduced, and manpower and material resources are saved.

The invention discloses a sepia-lycidas flow-type artificial fry breeding device. The sepia-lycidas flow-type artificial fry breeding device comprises a solid-liquid separation pond, an ammonia-nitrogen processing pond, a foam separation pond, a mechanical degerming device, an ultraviolet lamp and a culture pond which are sequentially connected to form a loop. The mechanical degerming device comprises a cylinder provided with an inner cavity; a piston capable of being driven by external force to slide in a reciprocating mode is arranged in the inner cavity of the cylinder; the cylinder is further provided with a liquid inlet channel and a liquid discharging channel, a liquid inlet valve rod is arranged in the liquid inlet channel, and a liquid discharging valve rod is arranged in the liquid discharging channel; the liquid inlet valve rod and the liquid discharging valve rod can be driven by the external force to control the inner cavity of the cylinder to be communicated with or insulated from the outside in a time-segmented mode; the liquid inlet channel is connected with a homogenate tank which can provide homogenate fluid; an air groove is formed in the inner wall of the cylinder; the distance between the two end portions of the air groove is greater than the thickness of the piston. The sepia-lycidas flow-type artificial fry breeding device has the advantages of being small in water change quantity, good in water processing effect, low in operating cost and manufacturing cost, good in stability, capable of producing a great number of fries and controlling the ammonia-nitrogen processing scale according to requirements, good in disease control effect and environmentally friendly.

The invention discloses an indoor culture method of biological flocs. The method comprises the following steps: calculating additive amount of an exogenous carbon source, maintaining C/N ratio in water to be (10-15):1, and starting to regulate inflating volume when water color turns to faint yellow from clear color or white so as to keep dissolved oxygen to be less than 1.0mg/L, wherein the exogenous carbon source is a mixture of glucose and cane sugar. The biological flocs culture method disclosed by the invention can realize successful culture of biological flocs indoors without oxygenation or with less oxygenation, overcomes the defect that the biological flocs only can be cultured under sufficient aeration condition at present, and realizes utilization of the biological flocs culture technology in indoor cultivation. By application of the culture method, mass propagation of heterotrophic bacteria in water can be promoted, formation of the biological flocs can be accelerated, content of nitrite and ammonia nitrogen in cultivation water can be lowered and water-change volume of the cultivation water can be reduced. According to the culture method, accumulation of harmful substances in the cultivation water is reduced, feed utilization efficiency is improved, and consequently, cultivation yield and cultivation income are increased.

The invention discloses an ecological cultivation method for juvenile and young hippocampi striatum. The ecological cultivation method comprises the following steps: step 1: building a culture pond; step 2, preparing before the breeding, preparing a nutrient solution for fertilizer and water, and controlling water microorganism; step 3: selecting and cultivating parents of hippocampus striatum; and step 4: cultivating juvenile and young fish. According to the ecological cultivation method for the juvenile and young hippocampus striatum provided by the invention, copepods can be normally bred in the culture pond and can provide palatable bait for hippocampus larvae of different specifications; at the same time, the amount of replaced water is little, and the water environment is stable, anda suitable ecological environment can be provided for the hippocampus larvae, thereby facilitating the growth and survival of the hippocampi striatum; and the survival rate and growth speed of the juvenile and young hippocampus striatum can be increased.

The invention discloses a sea cucumber culturing feed additive and a preparing and using method thereof. The feed additive is prepared from medical stone and Chinese herbal medicaments, wherein the mass mixing ratio of the medical stone to the Chinese herbal medicaments is 50-70:50-30; and the Chinese herbal medicaments comprise 30 to 50 mass percent of raidx astragali, 15 to 25 mass percent of Chinese angelica, 5 to 15 mass percent of common andrographis herb, 5 to 15 mass percent of honeysuckle flower, 5 to 15 mass percent of indigowoad leaf and 5 to 15 mass percent of fried scorch-fried crataegus. The preparation method comprises: grinding the components respectively; sieving the ground components with a 60 to 100 mesh sieve; and feeding the ground components in ratio into a feed mixer to stir the components uniformly, wherein the required coefficient of variation (CV) of mixing precision is less than 10 percent. The ratio of the sea cucumber culturing feed additive to the feed is 1:9, the feed additive is added into the feed, and the mixture is mixed uniformly and used in a larva pool. The sea cucumber culturing feed additive has the advantages of avoiding secondary pollution, reducing water exchange, effectively promoting the growth of sea cucumbers, improving the body immunity and disease resistance of the sea cucumbers, reducing the use of antibiotics and chemical medicaments, along with widely available raw materials, safety, no toxicity and convenient use.

The invention discloses a method for utilizing a biofloc technology to optimize breeding of juvenile litopenaeus vannamei, and relates to juvenile shrimp breeding. The method comprises the first step of putting incubated litopenaeus vannamei nauplius to a breeding unit containing breeding water to be subjected to breeding; the second step of adding a carbon source and probiotics into a body of water when the nauplius is developed to a Z2-M1 period, so that the biofloc is formed; the third step of reducing feeding amount and water exchanging amount after the biofloc is formed. The biofloc technology and an existing breeding technology are combined to be used for scale production of the juvenile litopenaeus vannamei, by using the biofloc to purify water quality and using the biofloc as a high protein fish bait for the juvenile litopenaeus vannamei, the effects of lowering water quality indexes like ammonia nitrogen, reducing the water exchanging amount and the feeding amount, and increasing the survival rate of the bred juvenile litopenaeus vannamei are reached, an ecological technical craft of breeding the juvenile litopenaeus vannamei is formed, and thus the method for utilizing the biofloc technology to optimize breeding of the juvenile litopenaeus vannamei has good ecological benefit and social benefit.

The invention discloses a shrimp culturing method. The shrimp culturing method comprises the following steps that (1) an aquaculture pond is prepared according to a conventional culturing method, and shrimp seeds are thrown into the aquaculture pond according to a conventional density; (2) 10 kilograms to 20 kilograms of bioflocculation provenance is poured into each mu every day when the ages of the shrimps are smaller than one month, and 20 kilograms to 30 kilograms of bioflocculation provenance is poured into each mu every day when the ages of the shrimps are larger than one month; (3) a water bottom aeration machine is used for oxygenation in the whole culturing process. The method for preparing the bioflocculation provenance comprises the steps that brown sugar, rice bran and feed additives are evenly mixed and then are added to clean fresh water to be evenly stirred, sealing is conducted, fermentation is conducted for three to four days at the temperature of 25-32 DEG C, and then the bioflocculation provenance is obtained, wherein the weight ratio of the clean fresh water, to the brown sugar, to the rice bran and to the feed additives is 250:5-8:30-40:2-3. By the adoption of the shrimp culturing method, the feed coefficient of shrimp culturing ranges from 0.7 to 0.8; compared with traditional culturing feed, the growing period of the shrimps cultured according to the method is shortened by 15 days to 20 days under the condition that the adult shrimps are obtained.

Th invention discloses a dish-washing machine easy to clean, and relates to a dish-washing machine. After the dish-washing machine is subjected to self-cleaning repeatedly, multiple food residues arestill adsorbed to the surface of a draining board, manual cleaning is needed, the vision feeling is affected, and the user experience is poor. The dish-washing machine comprises a tank, a trough body,a panel, a cleaning assembly, a connector, a water inlet assembly, a drainage assembly and a cabinet, and the trough body is formed in the upper portion of the cabinet; the cleaning assembly comprises a water guide plate and a filter; the water guide plate is provided with a water outlet; the filter is of a bottomless structure and is installed on the lower portion of the water guide plate, an upper opening of the filter is communicated with the water outlet, and a lower opening of the filter is connected with a slag breaker which is installed below a water pumping area. According to the technical scheme, the water guide plate guides washing water to flow, cleaning is facilitated, the food residues cannot be accumulated on the surface, the washing water good in washing effect can flow into the pumping area rapidly, the water filtration rate cannot be affected after long-time use, and the water resource is effectively saved.

The invention relates to a pond engineering circulating water culture method, which includes the following steps: dividing the pond into a centralized culture area, a dirt precipitation area and a water purification area, wherein the area of each area is respectively 2.0-4.0%, 50-60% and 36-48% of the effective area of the pond water body; forming a culture water groove in the centralized culturearea; sequentially arranging an ecological base and an ecological floating bed in the water purification area according to the flowing direction of the pond water body; stocking feeding fishes in a centralized culture area, stocking benthic fishes and filter-feeding fishes in the dirt precipitation area, and stocking filter-feeding fishes in the water purification area; adopting a feed feeding mode in the centralized culture area, and adopting a natural feeding and stocking mode in the dirt precipitation area and water purification area. Through the adoption of the method, the effects of little water change or even no water change can be achieved during cultivation, the cultivation water is recycled, the use of drugs is reduced, and the environmental pollution caused by emission is reduced, so that the method has a positive effect on ensuring a high-yield, high-efficiency, safe and ecological culture mode for the pond and effectively improving the quality of cultured fish products.

The invention discloses an application of bdellovibro swimmers in culturing young sea cucumbers, which is implemented by adding bdellovibro swimmer bacterial liquid to a water body and/or feeds. The implementation process specifically comprises the steps of preparing facilities and water quality conditions for culturing young sea cucumbers, catching parental sea cucumbers, rearing the parental sea cucumbers, hatching spawns and culturing larvae, and collecting and culturing young sea cucumbers. The key technology is as follows: adding the bdellovibro swimmer bacterial liquid with final concentration of 10-107pfu/mL to the water body and/or simultaneously soaking the feeds in the bdellovibro swimmer bacterial liquid with concentration of 10-107pfu/mL for 30 minutes. By applying the invention, the average survival rate of the cultured young sea cucumbers reaches more than 50%, and the water quality can be effectively improved. Experiment shows that the water can be kept unchanged in 20 days at most, thus saving the labor and cost and greatly improving the economic benefits. Besides, the survival rate of the cultured young sea cucumbers is high, the quality of the young sea cucumbers is good, and the invention is water-saving, energy-saving, environment-friendly and low-carbon.

The invention discloses a fish and flower simultaneous co-culturing device, which comprises a base, a fish tank and a top box, wherein the base, the fish tank and the top box are sequentially connected from bottom to top, the top box is provided with a groove plate to form a planting groove, the interior of the top box is provided with a water pipe mounting port and a water inlet, the interior of the fish tank is provided with a timing circulating jet pump which is connected with the water pipe mounting port of the top box through a water suction pipe and is connected with a power source, the lower end of the fish tank is provided with a outfall, the outfall is provided with a valve, and the interior of the base is provided with an LED (light emitting diode) lamp and a connecting electric line. The fish and flower simultaneous co-culturing device has the advantages that by arranging the LED lamp at the bottom part, various flowers and grasses can be planted at the top box according to self favorite, so the appearance is attractive, and the ornament value is high; the fishes and the flowers can be co-cultured, so the environment is beautified, the air is purified, and the household geomancy is improved.

The invention relates to a novel biological floc. The biological floc includes microalgae aggregates and commensalism heterotrophic bacteria, and the commensalism heterotrophic bacteria are Pesudomonas sp. and Bacillus sp. The biological floc significantly improves the water quality of the nursing pond of the litopenaeus vannamei, improves the survival rate, growth index and immunity of the litopenaeus vannamei, reduces the application amount of compound feed and external carbon sources, and reduces the aeration intensity and quantity of exchanged water.

The invention relates to a recirculating prawn aquaculture method in combination with a nitrification-assimilation effect and belongs to the technical field of aquaculture. A culture system used in the method comprises a culture pond, a microfilter, a water circulating pump, a biofilter, an ultraviolet sterilization device and a Roots blower; when the culture system is utilized for culture, browngranulated sugar 40-50% of the bait feeding amount or molasses 50-60% of the bait feeding amount is added into the culture pond every day to promote growth of heterotrophic bacteria, and part of metabolic waste is removed by utilizing the bacterial assimilation effect. According to the method, in the circulating water culture system with nitrification as a water treatment core, a carbon source iscontinuously increased in the culture process, growth of the rhodobacteriaceae bacteria in a culture water body is promoted, the bacterial assimilation effect is strengthened, meanwhile, the nitrification effect of nitrification bacteria is not inhibited, the assimilation effect and the nitrification effect jointly purify the water body, the microbial water treatment efficiency is improved, the load of a water treatment system is reduced, and a culture water environment is improved.

The invention provides a method for improving artificial hybridization of willow cut twigs. The method comprises the following steps: 1, bud twig collection and treatment, wherein an excellent single plant which grows robust and is free of plant diseases and insect pests and at the prime age is selected as a parent, and before buds begin to expand at the beginning of February, the twigs provided with buds are cut from the middle or upper portion of the crown in a selected mother tree, the diameter of each twig ranges from 1 cm to 2.5 cm, and the length of each twig is 1m; (2) after the twig is picked, conducting water planting on the male bud twigs in a greenhouse; placing the female bud twigs in shade for water planting, wherein the indoor temperature ranges from 8 DEG C to 11 DEG C, and the relative humidity ranges from 40% to 50%; three to five days later, moving the female bud twigs into the greenhouse for water planting together with the male bud twigs. According to the method, a soil culture method is adopted after the cut twigs are subjected to water planting and induced to root, the twigs are moved into flowerpots containing nutrient soil after root primordia emerge through water planting, for the bud twigs which are subjected to soil culture and root, a small amount of water is only supplied to the flowerpots when necessary, work such as pruning, cleaning and water exchange in the water planting process can be reduced, and labor and time are saved.

The invention discloses a breeding method for improving disease resistance of soft-shelled turtles, wherein the method includes the following steps: S1, building a breeding pond: arranging soil at thebottom of the breeding pond, sterilizing, applying an organic fertilizer, planting aquatic plants, injecting clear water and adjusting the pH value of the clear water; S2, putting the soft-shelled turtles and a bait material: selecting robust and young soft-shelled turtles, sterilizing, putting into the breeding pond with the female-male proportion of (3-5):1, and putting the bait material for 1-3 times daily; and S3, carrying out daily management: carrying out tour inspection of the breeding pond in the morning and evening, timely cleaning residual baits, and exchanging water timely. The breeding method for improving disease resistance of the soft-shelled turtles has the advantages of high utilization rate of resources, good self-regulation of the water body, less water exchange amount,reduction of breeding cost and green environmental protection, the soft-shelled turtles have the advantages of low incidence rate, good disease resistance, strong immunity, fast growth and development, short breeding cycle, good meat quality and high nutritional value, and the economic benefits of soft-shelled turtle breeding is increased.