451 results about "Shrimp culture" patented technology

The present invention relates to feed additives for shrimps in aquaculture. The invention provides methods for making a biological compositions comprising yeast cells that can improve the immune functions of shrimps in culture. The invention also relates to methods for manufacturing the biological compositions, and methods of using the biological compositions as feed additives.

The invention provides a shrimp-fish-shellfish-alga multi-unit culture and aquatic organism regulation system thereof. A shrimp culture zone, a fish culture zone, a shellfish culture zone, a large scale alga cultivation zone, a probiotics and microalga culture zone, a water processing zone and an emergency drainage system are arranged in a closed water circulation culture system, wherein the culture water circulates in different culture and water processing units. As the water circulates in different culture units and is utilized in multiple levels by various aquatic organisms of different trophic level and ecological niche, the system gives the various aquatic organisms full play to the positive bait resource complementarity, prevents the aquatic organisms from directly competing on living space and dissolved oxygen and reduces the mutual damage caused by organic remains and metabolic waste, achieves the 'self-modification' and 'biomanipulation' of the culture environment, enables the environment itself to recover from the pollution in culture process, and decontaminates the seawater culture environment.

The shrimp culturing system includes a culturing tank and a clarifier tank. A plurality of shrimp cubes are suspended in the culture tank by set pairs of support bars. Each shrimp cube includes a plurality of stacked frames set at predetermined intervals. Each frame supports a mesh therein providing living space for the shrimp, and each stack is interconnected by ropes, which connect to the support bars to be suspended thereby. The shrimp cubes provide maximal space for culturing shrimp. The waste water from the culture tank cycles into the clarifier tank, which nurtures a biofloc to consume the waste and assimilate nitrogen, thereby producing their own waste that can be consumed by the shrimp. Excess solid waste drains via a solids removal manifold, and clarified water is airlifted back into the culture tank. A post-larval tank can be stacked onto the clarifier tank to introduce new batches of shrimp.

The invention discloses a method for ecologically poly-culturing fishes with different feeding habits in net cages of a shrimp culture pond. A plurality of net cages are arranged in the shrimp culture pond; one or more omnivorous fishes, filter-feeding fishes and carnivorous fishes are put into the net cages; shrimps are put outside the net cages; the putting density of the shrimps is reduced; and the fishes and the shrimps are cultured in a separated manner by the net cages. The method can be used for culturing the fishes and shrimps in a separated manner, so that the shrimps are prevented from being preyed by the fishes, the fish baits are sufficiently utilized, and the catching is easy.

The invention relates to an aquaculture technology, which in detail relates to a two- stage controllable ecological and high effective technology for cultivating South America prawn in fresh water. It is characterized in that it comprises: in the first stage culturing young shrimps in temperature controllable shrimp culture pool for 28- 35 days until the prawn grows to 3- 6 cm; moving prawn to brackish water with low salt concentration for 100 days. The invention is suitable for prawn cultivation in north center, realizes cultivation effect in normal field the same to that in high- level pool with membrane in the bottom; the survival rate is high, fertilizer coefficient is only 0.92, and the cultivation quantity and economical benefit for prawn are increased.

The invention discloses an environmentally-friendly pond culture method for freshwater shrimps. The method comprises the following steps of: (1) selection of a pond; (2) pond reformation, (3) stocking of shrimp seedlings, (4) fodder and feeding, (5) water quality control and daily management and (6) catch of adult shrimps. Compared with the prior art, the method has the advantages that: popularization and application of the environmentally-friendly pond culture method for the freshwater shrimps successfully researched by the invention can gain better economic benefit in freshwater shrimp culture, more important, the water quality of the pond of the culture mode is kept well all the time, nearly no culture wastewater is drained and the ecological benefit is extremely obvious. Under the conditions of frequent disease attack of the current other shrimp varieties and higher culture risk, the popularization of the environmentally-friendly culture mode for the freshwater shrimps is a good path for becoming rich for fishermen.

A rice and lobster co-culture method includes a rice planting part and a lobster breeding part. The lobster breeding part includes the steps of (1) rice field modification; (2) juvenile shrimp culture; (3) adult shrimp breeding; (4) parent shrimp putting; (5) adult shrimp fishing, supplementary juvenile shrimp putting and parent shrimp retention. The rice planting part includes the steps of (1) rice cultivation; (2) rice field management; (3) field drying; (4) rice pest and disease control; (5) draining and harvesting. Compared with an ordinary rice and lobster co-culture mode, the morbidity frequency of lobsters can be reduced to 45 days or so from 7-10 days, the disease control cost is reduced by 150 yuan / mu or so, and the survival rate can be increased to 80% or above from 30-40%.

The invention discloses a fresh water shrimp culture method, which comprises the steps of weed culture, shrimp postlarvae selection, stocking time selection, and control during shrimp postlarvae culture. The step of control during the shrimp postlarvae culture comprises the steps of: controlling waterweed coverage rate and water body transparency: when the fresh water shrimp culture is in the medium term, particularly fresh water shrimps enter autumn-propagation season (August and September in Yangtze river basin), the waterweed area is controlled to be 40 to 50 percent of the water body area, the transparency is controlled to more than 40 centimeters, and shrimp postlarvae is difficult to survive due to insufficient plankton bait; and killing the autumn-propagation shrimp postlarvae by skillfully using quick lime: during culture, the growth and development condition of the shrimps is frequently observed, particularly when the fresh water shrimps enter the autumn-propagation season (August and September in Yangtze river basin), the egg hatching condition of precocious female is observed, and when eggs of most ovigerous female become grey or transparent or zoea is hatched out, 10 to 14g of quick lime is used for each cubic meter of water body, the quick lime is sprayed to all the pond in six days, and afterwards the quick lime is used once each week to kill the autumn-propagation shrimp postlarvae. The technical measure can reduce 70 to 90 percent of autumn-propagation shrimp postlarvae.

The invention discloses a method for establishing the algal phase of a shrimp culture pond, microalgae with the dominance of greater than 0.15 is selected from a culture water body, the microalgae is arranged in culture liquid with the nitrogen source concentration of 261 to 338mumol / L and the phosphorus source concentration of 25 to 32mumol / L, the enlarged culture and propagation are carried out under the culture conditions till the microalgae total biomass which is required by the shrimp culture, algae liquid is further introduced into the shrimp culture pond for the shrimp culture: the temperature is 24 to 27 DEG C; the salinity is 21 to 26; the pH is 7.5 to 8.5; the light intensity is 5500 to 7000Lx, and the lighting ratio is 12: 12 to 14: 10. The microalgae ecological environment of the shrimp culture pond is optimized by establishing the algal phase to cause the balanced culture of various types of microalgae, thereby being conductive to avoiding the single biological diversity of the shrimp pond caused by excessive culture of individual microalgae or group disappearance during the culture process and the situations of drastic change of water environment, deterioration of the quality of the environment of the culture water body, and the like.

The invention relates to a device and a method for removing sewage and preventing live shrimps from escaping in a circulating water shrimp culture system. The bottom sewage collecting pipe is arrangedat the bottom of the aquaculture pond with a sewage collecting outlet on it. a live shrimp escape prevention frame is arranged in a backwater sewage discharge groove, and an escape prevention net isarranged in the live shrimp escape prevention frame; one end of the bottom sewage collecting pipe is closed, and the other end of the bottom sewage collecting pipe is communicated with the inside of the escape prevention net through a backwater pipe; one end of the water level adjusting pipe is inserted into the backwater sewage discharge groove and is positioned outside the live shrimp escape prevention frame, and the other end of the water level adjusting pipe is connected with a backwater pipeline of the circulating water system through a lower backwater pipe; and the water level is adjusted by inserting the water level adjusting pipe into the height of the backwater sewage discharging groove. The device and the method for removing sewage and preventing live shrimps from escaping in circulating water shrimp culture system are not only beneficial to observing the removal of dirt and the escape condition of live shrimps, but also can regularly clean or replace the escape prevention net so as to prevent the escape prevention net from being blocked to influence the circulation of a circulating water system and effectively solve the problem of removing sewage in the process of culturing shrimps by circulating water, and can effectively prevent the live shrimps from escaping and facilitate the separation of the dead shrimps and the live shrimps.

The invention relates to a method for constructing a specific pathogen-free penaeid shrimp culture system, which comprises the steps of adopting comprehensive treatment of culture water for avoiding the entry of pathogens; introducing selected oocystis borgei into a penaeid shrimp culture pond for constructing a good microalgae community structure, and using a microalgae-controlled water environment to reduce the concentration of injurious factors, such as ammonia nitrogen, nitrite nitrogen and the like in a water body, improving the water quality, eliminating stress factors, improving the content of dissolved oxygen in the water and leading the environment of the water body to be in the good dynamic balance state for a long time. A system of the oocystis borgei, rhodopseudanonas palustris and phycomycete is utilized for inhibiting the growth of vibrios during the early stage, the middle stage and the late stage of culture; and schmackeria dubin is utilized to intake microalgae, thereby controlling the number of the microalgae in the water body and eliminating the adverse impacts of rapid proliferation of the microalgae on a culture environment. Penaeid shrimps have the advantages of specific pathogen-free property, rapid growth, strong disease resistance, strong stress resistance, short culture period, large and uniform formed size, high output, good investment efficiency and the like.

The method for increasing commodity rate of breeding black shrimps in the invention includes selecting excellent seeds, postponing the time of shrimp postlarvae stocking properly and feeding some chubs, bighead carps, etc., controlling the coverage rate of float grass and the transparency of water, and making use of calces. When in the metaphase of breeding black shrimps, more particularly, when the black shrimps are in the propagation season of Autumn, the area of float grass is controlled to be 60-70% of the water area, the transparency is controlled to be 40-50cm. In the propagation season, when the color of oogenesis of shrimps becomes grey and transparent, or flea-shape larva is hatched out, calces of 10-20g per stere is used for spraying the whole pool within five days, then the method is used every week and is totally used for 7-10 times. By increasing the measures of controlling the coverage rate of float grass and the transparency of water and making use of calces, neoteny of black shrimps and over propagation are controlled, the growth of grown shrimps is promoted, and the commodity rate of black shrimps can reach 90% at the end of the year. The method of breeding black shrimps has the advantages of easy and convenient operation as well as easy popularization and use, etc., which is a good method for effectively increasing commodity rate of breeding black shrimps.

The invention provides an ecological young shrimp culture method for macrobrachium rosenbergii. The method includes the steps of preparing a young shrimp culture pond, preparing water used for young shrimp culture, obtaining young shrimp larvas, feeding bait, managing water quality, transferring the young shrimps to another pond, desalting for young shrimp emergence and the like. In the bait feeding process, the young shrimps are fed on natural bait unit cell algae, fairy shrimp nauplii and artificial bait egg custard, the natural bait is environmentally friendly and healthy, the articical bait is rich in nourishment, and nutritional ingredients are not prone to running off; when the water quality is managed, nuisanceless water quality ameliorant and microbial preparations are adopted to adjust the water quality. Hormones and poisonous chemicals are not used in the young shrimp culture process, the young shrimps are high in survival rate and grow healthily and strongly, young shrimp emergence is fast, and the ecological young shrimp culture method is low in cost, high in efficiency and capable of effectively increasing economic benefits of an aquaculture farm.

The present invention is technology of cultivating hybrid fresh water crayfish in rice and lotus field. The technology includes selecting rice and lotus field, sterilizing, applying basal fertilizer, transplanting rice or lotus, raising young crayfish, filtering to avoid escape and field management. The present invention has simple method, high crayfish yield, low cost and other advantages.

The invention relates to a water quality control method for indoor high-density temporary shrimp seed culture. The method includes the steps of ponding preparations of temporary culture device arrangement, culture water disinfection, probiotics adhesion and inoculation and water environment regulation, and temporary culture process water quality control of early-period water quality control in temporary culture and later-period water quality control in temporary culture. Diaphragms and an aerating pipe are arranged in a temporary culture pond of the temporary culture device. The method has the advantages that since the diaphragms are hung in the temporary culture water, shrimp seed perching and adhesion area is increased, and temporary culture density is increased; bait particles fed in the early period are evenly distributed in the water and mostly adsorbed on the surfaces of the diaphragms by the aid of the rough surfaces of the diaphragms and water flow drive caused by even aeration, and accordingly specification irregularity caused by ingestion difference is reduced; biological membranes can be formed on the surfaces of the diaphragms to absorb and degrade suspended organic chips, residual feeds, faeces, water soluble nitrogenous pollutants in the water, good culture environment is maintained, wastewater emission in the culture process is reduced, and environmental pollution is reduced. Besides, the method can be applied to shrimp culture.

The invention discloses a Bacillus subtilis N2 with an ammonia nitrogen degradation function and application thereof. The Bacillus subtilis N2 is isolated from a shrimp culture water body. Studies confirm that the Bacillus subtilis N2 can quickly and effectively reduce the ammonia nitrogen content in the water body, and do not convert ammonia nitrogen into nitrite to cause stress or damage to a cultured object again. In addition, the Bacillus subtilis N2 and artemia gnotobiote tests show that at higher concentrations, a strain does not produce toxic effects on farmed animals, and has certain probiotic effects; the strain is more tolerant, a salinity and the environmental pH have little effect on bacterial growth, and regardless of being isolated from the freshwater or the seawater and theacid or the alkali environment, the strain N2 can grow well and function efficiently; it is of great significance in the marine aquaculture industry. The Bacillus subtilis N2 is inoculated into the aquaculture water body, the water quality is stable, the cultured object grows healthily, the adaptability is strong, and the safety is high. The strain can be used as a good strain of a novel microecological preparation and have a good application prospect.

The invention relates to an industrial prawn culture system based on gas stripping circulation. The industrial prawn culture system based on gas stripping circulation comprises a culture pool group consisting of two pairs of prawn culture pools distributed in a matrix shape, wherein the long-strip region between the two pair of prawn culture pools is a circulating water disposal pool; the circulating water disposal pool comprises a middle gulley trap, as well as a mechanical floatation tank and a biological filter which are sequentially distributed on two sides of the middle gulley trap; the shrimp culture pools are communicated with the mechanical floatation tank; the mechanical floatation tank is communicated with the biological filter; a gas stripping tube is arranged between the biological filter and the prawn culture pools and is provided with at least two layers of optional gas stripping water outlets in upper and lower layers; when in use, the difference between the height of the gas stripping water outlets and the liquid level is less than 10cm; the top of the mechanical floatation tank is connected with a blowdown weir through the gulley trap; the center of the prawn culture pool is provided with central drainage holes; each central drainage hole is communicated with a trench through a blow-off pipe. The system is simple in process and simple in facilities, and can be used for effectively reducing the equipment investment and running cost of an industrial circulating water prawn culture system, reducing the water circulation energy consumption and improving the survival rate of prawn culture.

The invention discloses a three-dimensional composite duck and shrimp culture method carried out in a rice field. The method includes the following steps of preparing the rice field, selecting rice seeds, ducklings and shrimps, cultivating rice, putting the ducklings into the rice field, putting the shrimps into the rice field, carrying out field management, luring the ducklings to get out of the rice field, harvesting rice and catching the shrimps. The ecological adaptability of the method is high, the structure of products obtained in the method is various, the economic efficiency is high, diseases, insect pests and weeds can be prevented for the rice by means of the ducklings and the shrimps, the use quantity of pesticides and chemical fertilizers can be reduced, pollution to the environment is reduced and planting cost can be further reduced.

The invention discloses fermented soft pellet feed used for shrimp culture. The fermented soft pellet feed used for shrimp culture is obtained by fermenting feed raw materials with a zymophyte-enzymecompound preparation; and the feed raw materials comprise the following components in parts by weight: 3-15 parts of shrimp meal, 8-20 parts of fish meal, 10-30 parts of soybean meal, 3-15 parts of black soldier fly powder, 3-15 parts of shrimp shell powder, 3-15 parts of plasma proteins, 1-10 parts of silkworm chrysalis meal, 0-5 parts of water-soluble chitin, 1-10 parts of peanut meal, 5-20 parts of flour, 2-8 parts of potassium fulvate, 0-5 parts of fish oil, 0-5 parts of soybean oil, 0-5 parts of soybean phospholipid, 0.1-1.5 parts of calcium phosphate monobasic, 1-10 parts of a shrimp premix and 1-10 parts of a Chinese herbal medicine compound additive. According to the fermented feed, a method of pelleting before fermentation is adopted, nutrient substances of the raw materials are kept, and a digestive enzyme and active bacteria and fungi are added, so that the fermented soft pellet feed used for shrimp culture has the functions of significantly enhancing intestinal immunity ofshrimps and protecting livers and intestinal functions.

The invention aims to provide a method for sex induction of hermaphrodite shrimps. According to the method, a target gene in macrobrachium is silenced by using an RNA interference technology to realize sex induction of macrobrachium rosenbergii, wherein the nucleotide sequence of the target gene is SEQ ID NO:1. By virtue of the induction technology provided by the invention, a macrobrachium individual has sex reversion and becomes hermaphrodite macrobrachium rosenbergii, and the developments of a female reproductive system and a male reproductive system are realized in the body of the hermaphrodite macrobrachium rosenbergii, so that a set of effective macrobrachium rosenbergii sex induction technology is established. Meanwhile, by using the hermaphrodite shrimps cultured by the method provided by the invention, a good scientific research material and an animal sample can be provided for sex determination, sex differentiation and researches on reproduction and fertilization of shrimps and crabs.

The invention discloses a shrimp ditch sterilization device for rice field shrimp culture, and belongs to the technical field of rice field shrimp culture sterilization equipment. The device comprisesa bottom plate; rolling wheels are arranged at the bottom end of the bottom plate in a bilateral symmetry mode; a vertical frame is arranged at the right side of the top end of the bottom plate; anda push handle is arrange at the upper part of the right side of the vertical frame. Through arrangement of a stirring mechanism, when a motor moves at different rotating speeds, the stirring area of the stirring mechanism can be changed, so that the stirring area is enlarged, and the mixing effect and efficiency among liquid reagents are improved; through arrangement of a liquid circulating mechanism, liquid at the bottom of the box body can be pumped to the top of a box body, so that the purpose that liquid circularly flows up and down in the box body is achieved, contact between liquid on different layers with the stirring mechanism is increased, and the mixing effect and efficiency of liquid reagents are further improved. The stirring mechanism and the liquid circulating mechanism sharea same set of motor, so that the device structure is simplified, and the electric energy utilization rate is increased.

The invention provides an industrial circulating water shrimp culturing method capable of increasing the efficiency. The method is characterized in that five shrimp culturing ponds are taken as a combination, and one standard coarse culturing pond is mainly applied to centralized standard coarse culturing and timely nutritional culturing; four culturing special ponds are specially used for culturing commercial sized prawns; centralized standard coarse culturing is combined with dispersed culturing; each pond is provided with an independent circulating water system. The method is suitable for industrial circulating water shrimp culturing; a water pond combination is adopted, and standard coarse-nutritional culturing, centralized standard coarse culturing and dispersed culturing are combined in an identical system, so that six times of culturing can be performed, the waste discharge amount is small, the production efficiency is high, the economical benefit is good, the front-stage utilization ratio of a circulating water shrimp culturing system is increased, the front-stage water body space and facility running waste are reduced, and the problems of inhibition of growth, excessive deposition of harmful substances in water and high water treatment load at a later stage due to excessive culturing capacity are solved.

The invention belongs to the field of shrimp culture and discloses a continuous culturing method for two-year-five-crop prawns. The continuous culturing method for two-year-five-crop prawns concretely comprises steps in that during the first crop, South America prawns and fishes are mixedly cultured around the Tomb-Sweeping day; during the second crop, penaeus japonicus are stocked around the Autumn Begins day; during the third crop, South Africa prawns are stocked around the First Frost Day and cultured in a winter shed around the Light Snow day; during the fourth crop, the South Africa prawns and fishes are mixedly cultured around the Tomb-Sweeping day of the next year; and during the fifth crop, penaeus japonicus are stocked around the Autumn Begins day of the next day. The culturing mode has the great advantage of stable production. The prawn and fish mixed-culturing mode has excellent stability; the penaeus japonicus has high economic value; winter shed prawns are welcomed by farmers due to stability and high profits; three excellent culturing modes are combined, rational seedling releasing density is set out and scientific set meals matches and detailed daily management are arranged, so farmer earnings can be greatly improved; and a system solution scheme is provided for the prawn culturing industry.

The invention relates to a microbial preparation for marine culture and a production method of the microbial preparation. The microbial preparation mainly comprises bacillus aquimaris. The microbial preparation has good characters and has the functions of well improving a substrate of a culture pond, decomposing organic wastes, reducing the content of ammonia nitrogen and nitrite and promoting growth of sea cucumbers. The bacillus aquimaris can grow in a low-temperature and high-salt environment, the acre yield of sea cucumbers can be improved in seedling growth and culture of the sea cucumbers, vibrios can be suppressed for shrimp culture, the disease rate is reduced, and the acre yield is improved. Meanwhile, the bacillus aquimaris has the characteristic of high salt resistance and can grow under the condition with the content of salt below 4%.

The invention discloses a rice, lotus, fish and shrimp polyculturing method. The rice, lotus, fish and shrimp polyculturing method comprises the following steps of (1) base fertilizer application, (2) lotus planting, (3) rice planting and shrimp stocking, (4) fish stocking, (5) bait feeding and (6) topdressing. The rice, lotus, fish and shrimp polyculturing method makes full use of the growth requirement required by lotus, fish and shrimp; shrimp can loosen soil during crawling and fish is prone to moving in mud to search for food, so that during polyculturing, the shrimp and the fish can help form viscous and loosened soil and mud, which are suitable for growth of the lotus; meanwhile, the lotus can transmit air via pores in lotus root to meet the requirements on respiration during growth and supplement sufficient oxygen content for the fish and the shrimp; fish and shrimp culturing and lotus growth supplement each other; by matching with acid fertilizer in soil, which is rich in organic matters, the lotus can be stout and strong in rhizome, thick in flesh, strong in shape and high in quality; by planting floating rice inside a lotus pond, the lotus pond can be made full use of.

The invention relates to an Australia lobster Chinese herbal medicine feed additive which is characterized by consisting of the following components in parts by weight: 3-8 parts of common andrographis herb, 2-8 parts of felwort, 4-9 parts of inkfish powder, 5-10 parts of selfheal, 10-18 parts of isatis root, 6-10 parts of codonopsis pilosula, 5-10 parts of common andrographis herb, 6-12 parts of skullcap, 3-5 parts of clover, 1-2 parts of bitter gourd flower, 3-5 parts of cushaw flower, 1-2 parts of dragon's tongue leaf, 1-2 parts of pseudostellaria maximowicziana and 10-15 parts of the root of Chinese pulsatilla. The Australia lobster Chinese herbal medicine feed additive is mainly used for improving the moist resistance, heat resistance, virus resistance and growth promotion capacity of Australia lobster under high-temperature high-density breeding conditions; the Chinese herbal medicine additive has the effects of clearing away heat and toxic materials, resisting bacteria, diminishing inflammation and resisting viruses, the body balance and physiological functions of the Australia lobster are regulated, the digestive absorption is improved, and the growth is promoted. Moreover, the cost of the feed is greatly reduced through adoption of raw materials which are both medicine and food, so that healthy and safe shrimp culture is possible.

The present invention relates to the technical field of shrimp culture, and discloses a shrimp culture farm. The shrimp culture farm comprises a site and a greenhouse structure which covers the site,wherein the site is provided with a culture module, a new water treatment module, a tail water treatment module and a water purification module; the culture module consists of a plurality of multi-stage culture pools; the new water treatment module is used for treating externally introduced new water; the tail water treatment module is used for treating tail water discharged by the culture module;and the water purification module is capable of purifying the water treated with the tail water treatment module and the new water treatment module and providing the purified water for the culture module to use. The shrimp culture farm solves the problem of low shrimp culture yield caused by incapability of effectively utilizing the site space of the culture farm in an existing culture pool typeshrimp culture mode, and also solves the problems of environmental pollution and water resource waste caused by directly discharged sewage and incapability of recycling the tail water in the culture pools due to no water recycling system in an existing shrimp culture farm.

The invention discloses a strip planting method of aquatic plants in a crab-shrimp culture pond. The method includes: clearing and sterilizing a pond, designating an aquatic plant area and a non-aquatic-area area, applying fertilizers in the aquatic plant area by deep tillage, fencing a bottom compact field, planting aquatic plants, reasonably managing the aquatic plants, and removing a fence. The strip planting method of aquatic plants in the crab-shrimp culture pond has the advantages that growth characteristics of the shrimp and crab and growth habits of different aquatic plants are combined, the functions of the aquatic plants in improving environment and promoting growth of the shrimp and crab are given to maximum play, and yield of the shrimp and crab can be increased by 5-10%.

The invention discloses a high-yield shrimp culture method. The high-yield shrimp culture method includes the steps of feeding, management and the like. In this way, the high-yield shrimp culture method can improve the disease resistance of shrimps, make the shrimps taste better, increase the nutritive value of the shrimps, achieve environmental friendliness and safety and increase the yield.