CN101962227B - Method for removing water eutrophication - Google Patents
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- CN101962227B CN101962227B CN200910057635A CN200910057635A CN101962227B CN 101962227 B CN101962227 B CN 101962227B CN 200910057635 A CN200910057635 A CN 200910057635A CN 200910057635 A CN200910057635 A CN 200910057635A CN 101962227 B CN101962227 B CN 101962227B
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Abstract
The invention discloses a method for removing water eutrophication, which comprises the following steps of: investigating a community structure of aquatic organisms in water body, and finding a missing link or broken link in a food chain according to an investigation result; stocking predacious fishes in the water body, removing small trash fishes and herbivorous fishes from the water body by adopting a medicament mode or a manual fishing mode, and regulating the community structure of the fishes in the water body; planting submerged plants, floating plants and emergent aquatic plants in the water with the depth of 0 to 1.5m; and stocking filter-feeding fishes, filter-feeding shellfishes, detritus feeding benthonic animals and herbivorous fishes in the water body. The method for removing water eutrophication can realize the removal of the water eutrophication and ecological restoration for large-scale water body of which the parameters cannot be manually controlled, effectively inhibit the outburst of algal bloom and keep the stable quality of the water body.
Description
Technical field
The present invention relates to water ecology and repair the field.Relate in particular to a kind of method of the body eutrophication of anhydrating.
Background technology
In recent years, water pollution and eutrophication phenomenon were very serious, and from the whole nation, in the storehouse, 27 emphasis lakes of monitoring, 20 in the storehouse, lake of the bad V class of IV-water quality is up to 74%.Wherein " three lakes " (Taihu Lake, Chaohu, Dian Chi) water quality is bad V class, and main contamination index is total nitrogen and total phosphorus.Particularly in May, 2007 Taihu Lake blue-green alga bloom incident, directly influence Wuxi resident's drinking water safety.From Shanghai; Upper reaches source quality 83% is V class and bad V class; All there was wawter bloom in various degree to occur as the Dianshan Lake at one of water source is almost annual in recent years; Article 16, bad V class water accounts for 53.4% in main river course (like Huangpu River, Suzhou River, Tai Pu river etc.), has not had I class water quality river course at present, and national water quality type lack of water city ranks have been stepped in Shanghai.Therefore, the environmental quality renovation of waters, the face of land is being faced with unprecedented challenge.
In recent years, along with expanding economy and growth in the living standard, all kinds of artificial water landscapes in Shanghai City different zones arise at the historic moment, according to incompletely statistics, Shanghai City man-made tourist site water surface area is above 2,100,000 square metres.Result through typical representational artificial water scenery water quality being carried out researching determining shows; Monitoring data analysis from 25 section water samples; III, IV, V and bad V class water account for 8%, 32%, 28% and 32% of monitoring sum respectively; Wherein V and bad V class water account for 60%, and organic indicators such as being followed successively by total nitrogen, potassium permanganate salt index, COD, five-day BOD and ammonia nitrogen mainly exceeds standard.Though the quality of man-made tourist site water body is better than river, the whole city, Lake Water Body, water eutrophication also be really one very urgent, concerning the major issue of citizen's living environment.
At present, the domestic method that is used for the eutrophic water restoration of the ecosystem adopts the microbially decontaminate method more, and this method is because microbe population is huge, and decomposition rate is fast, can obtain positive effect in a short time fast; But also short just because of life cycle, life vigor relies on reasons such as water temperature, and the N of decomposition, P can not be removed polluted water body fully, so this method only is fit to the water pollution processing of short-term.And the macroscopical aquatic animals and plants method of domestic employing is carried out the ecological water processing; Normally only adopt the submerged vegetation reparation or only adopt filter-feeding fish control algae to purify water; And usually than the sealing water body of small scale (as below 100 mu) or can the MC water level, waters such as MC current carries out ecological water and handles; And for the water body than big scale, this single method is difficult to obtain ideal effect.
Summary of the invention
The technical problem that the present invention will solve provides a kind of method of the body eutrophication of anhydrating, this method can to one can not MC water body parameter carry out effective body eutrophication than the big scale water body and remove, realize restoration of the ecosystem than the big scale water body.
In order to address the above problem, the anhydrate method of body eutrophication of the present invention may further comprise the steps:
Hydrobiological structure of community in the investigation water body according to this investigation result, is found out missing link or chain rupture link in the food chain, and is adjusted food chain with this, and inflation method comprises:
Put predacious fish in a suitable place to breed or take the medicine mode in the water body kind, remove raw fish and herbivorous fishes in the water body, adjustment water body fish structure of community;
Kind planting submerged plant, floatingleaved plant and emergent at the bottom of 0～1.5m depth of water;
In water body, put filter-feeding fish, filter-feeding shellfish, chip feeding habits zoobenthos and herbivorous fishes in a suitable place to breed.
Submerged plant, floatingleaved plant and emergent to growing up are directly gathered in, or herd to support and fish for after herbivorous fishes ingest to submerged plant, to migrate out water body to these three types of waterplant from water body and the water-bed nutritive substance that absorbs.Preferred; Before submerged plant, floatingleaved plant and emergent death, it is gathered in; Because the decomposition experimental result after the submerged plant death shows: the interior phosphorus content of body discharges in 1 week and finishes after the submerged plant death; Nitrogen content discharged in 1 month and finishes, and after submerged plant death, gathered in, and caused the secondary pollution of water body easily.
Fish for predacious fish, filter-feeding fish, herbivorous fishes, filter-feeding shellfish and the chip feeding habits zoobenthos put in a suitable place to breed, to migrate out water body to nutritive substance.Preferred, fish are fished for putting the back in a suitable place to breed and prohibit fish and carried out later in 3 years, make the control algae fish biomass of keeping capacity in the water body, and the fish population age structure is abundant, mends simultaneously and puts the fish density of fishing for, and realizes multiple stocking and multiple fishing.
Preferably, before kind of planting submerged plant, at the floatingleaved plants such as the peripheral water chestnut of plantation earlier of submerged plant growing area, with construction submerged plant growing area static relatively water surrounding and the transparency that meets the submerged plant survival; When kind of planting submerged plant, the kind of selecting fish not like food and survival is easily earlier planted as pioneer plant; When the transparency that grows up to construction when floatingleaved plant and pioneer submerged plant reaches 80～100cm, broadcast the submerged plant of planting fish happiness food in this transparency depth of water scope again.Preferred; When the depth of water surpasses 0.8 meter; Said pioneer plant is selected from the high submerged plants of plant type such as comprising watermifoil, p.malaianus or water caltrop, and during smaller or equal to 0.8 meter, said pioneer plant is selected from submerged plants such as comprising hornwort, eel grass or waterweed in the depth of water; The submerged plant of said fish happiness food comprises hydrilla verticillata or eel grass, and the submerged plant of this fish happiness food is broadcast and plants in 1.0 meters of the depth of waters with interior coastal belt.
The cultivated area of said submerged plant accounts for 20～30% of the whole water surface, planting density be 60～80 strains/square metre.
Preferably, described filter-feeding fish in the winter time or when putting in a suitable place to breed spring, the fingerling specification of putting in a suitable place to breed is 5 tail/jin, and stocking rate is 35～50g/m
3Said filter-feeding fish is when putting in a suitable place to breed summer, and the summer flower fry specification of putting in a suitable place to breed is 4000 tail/kilograms, and stocking rate is 2～30,000 tail/mus.
The said filter-feeding shellfish of putting in a suitable place to breed comprises hydriopsis cumingii, anodonta woodiana pacifica or cristaria plicata, and stocking rate is 20～50g/m
3
The said chip feeding habits zoobenthos of putting in a suitable place to breed comprises shrimps or snail.
Preferably, reach 50% in the submerged plant cover degree and adopt when above net cage to herd foster mode to put herbivorous fishes in a suitable place to breed, the control submerged vegetation is spread unchecked, and also controls simultaneously and destroys aquatic vegetation because of herbivorous fishes are excessive.
The anhydrate method of body eutrophication of the present invention; Reach 800 mu at water surface area; Water level, water (flow) direction, flow velocity all can not the people be the application of succeeding of the lake water territory, natural big shallow lake controlled, have effectively suppressed the outburst of blue-green alga bloom, and V class to the bad V class of the water quality after the processing during by water inlet reaches III-IV class water quality standard; And the water quality after should handling can keep stable, has realized the self-restoration of the ecosystem than the open eutrophication water of big scale.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is done further explain.
Fig. 1 is the anhydrate synoptic diagram of 5 nutrition short chains that the method for body eutrophication makes up in water body of the present invention;
Fig. 2 is the anhydrate exploded view of 5 nutrition short chains that the method for body eutrophication makes up in water body of the present invention.
Embodiment
The invention provides a kind of method of the body eutrophication of anhydrating, may further comprise the steps:
The hydrobiont background survey.
Find out hydrobiological structure of community characteristics such as water body fish, planktonic organism, zoobenthos, pasture and water; According to investigation result, find out water body and go eutrophication food chain missing link or chain rupture link, through repairing or rebuilding the nutrition short chain, reach the eutrophication purpose.
Adjustment water body fish structure of community.
Put predacious fish (like mandarin fish, erythroculter ilishaeformis) in a suitable place to breed, throw in the medicine mode,, remove herbivorous fishes (like grass carp, bream) through the mode of fishing for, for kind of a planting submerged plant creates conditions to remove raw fish (like pseudorasbora parva, meal bar fish etc.).
Kind planting submerged plant, floatingleaved plant and emergent at the bottom of 0～1.5m depth of water.
Floatingleaved plants such as water chestnut, the fish of at first selecting fish not ingest are not liked the kinds such as submerged plant of food and survival easily and plant as pioneer plant.Select watermifoil, p.malaianus (growth summer and autumn) and the water caltrop higher submerged plants of plant type such as (winter-spring season growths) to plant in the depth of water above under 0.8 meter the envrionment conditions; The depth of water then selects hornwort, hydrilla verticillata (growth summer and autumn) and waterweed (winter-spring season growth) to plant smaller or equal to 0.8 meter coastal belt.Build up when reaching transparency and being 80～100cm at pioneer's botanical system, broadcast winter in this transparency depth of water scope again and plant the hydrilla verticillata hibernaculum, broadcast spring and plant the eel grass seed; Can carry out the submerged plant nutrition plantlet of transplant work of these two kinds of fish happiness foods summer.The hydrilla verticillata hibernaculum is broadcast 100～200 jin/mu of the amounts of planting; The eel grass seed is broadcast 3～4 jin/mu of the amounts of planting.After the submerged plant survival growth, can spread, depend primarily on transparency change to 1.5～2.0 meters depth of waters and depths more.The submerged plant cultivated area accounts for 20～30% of the whole water surface, planting density 60～80 strains/square metre.
Put hydrocoles in a suitable place to breed.
After coastal belt submerged vegetation structure is stable, just can put hydrocoles in a suitable place to breed.
Select low temperature season (the 1-2 month in December to next year usually) to put filter-feeding fish (fingerling, 5 tail/jin), stocking rate 35～50g/m in a suitable place to breed
3(foundation: the water body planktonic algae nature primary productivity of mensuration), can effectively prevent the generation of algal bloom.Also can be chosen in and put filter-feeding fish summer flower fry (4000 tail/kilogram) in a suitable place to breed in high temperature season such as June, about 2～30,000 tail/mus of stocking rate.
Can put any period such as filter-feeding shellfish such as hydriopsis cumingii, anodonta woodiana pacifica, cristaria plicata etc. in a suitable place to breed in 1 year; But because be the growth and breeding animated period of filter-feeding shellfish 4～June; Be chosen in that to put filter-feeding shellfish effect 4～June in a suitable place to breed preferable, putting quantity in a suitable place to breed is 20～50g/m
3, can make corresponding adjustment according to water body substrate situation.
Put chip feeding habits zoobenthos in a suitable place to breed and also can in 1 year, carry out any period, same because 4～June is the growth and breeding animated period of chip feeding habits zoobenthos such as shrimps, snail, is chosen in that to put chip feeding habits zoobenthos effect 4～June in a suitable place to breed preferable.These two types of chip feeding habits zoobenthos have very strong prolificacy, so stocking rate can be suitably a small amount of.
Surpassing 50% in the submerged plant cover degree adopts when above net cage to herd to support herbivorous fishes control submerged plant and spreads unchecked.
Harvesting submerged plant, floatingleaved plant and emergent.
In the June in every year, winter-spring season grass classes such as harvesting water caltrop; In annual pasture and water kind of gathering in growth summer and autumn 10～November, to migrate out water body to submerged plant, floatingleaved plant and emergent from water body and the water-bed nutritive substance that absorbs.Because the decomposition experimental result after the submerged plant death shows: the interior phosphorus content of body discharges in 1 week and finishes after the submerged plant death; Nitrogen content discharged in 1 month and finishes; Therefore must before submerged plant death, receive and cut open; Can be discharged into once more in the water body otherwise absorb the nutritive substance that transforms, cause endogenous to pollute through submerged plant.
Fish for hydrocoles.
Fish for predacious fish, filter-feeding fish, herbivorous fishes, filter-feeding shellfish and the chip feeding habits zoobenthos put in a suitable place to breed, to migrate out water body to nutritive substance.Usually select low temperature season, how to fish in autumn and winter.Can carry out the fish prods results through fishing for, take out fish to migrate out water body to nutritive substance.Fish fish for that being preferably in prohibits fishing after putting in a suitable place to breed carried out later in 3 years, can make the fish population age structure abundant, and population is stable.Mend simultaneously and put the fish density of fishing for.Realize wheel mend wheel put catch stay greatly little.The rate of catching out is no more than 2/3 of aquatic products potentiality.
Through the anhydrate above-mentioned steps of method of body eutrophication of the present invention; 5 nutrition short chains (seeing Fig. 1,2) in eutrophication water, have successfully been made up; I.e. 1. planting aquatic plants (comprising submerged plant, floatingleaved plant and emergent); Absorb the water nutrition material, directly gather in waterplant and remove nutritive substance; 2. plant planting submerged plant, absorption of nutrients matter adopts net cage to put herbivorous fishes in a suitable place to breed and herds the food submerged plant, fishes for taking-up to herbivorous fishes again, thereby takes away nutritive substance; 3. nutritive substance is absorbed by algae, puts the filter-feeding fish algae that ingests in a suitable place to breed, takes away the nutritive substance in the water body through fishing for filter-feeding fish; 4. nutritive substance is absorbed by algae, puts the filter-feeding shellfish algae that ingests in a suitable place to breed, takes away the nutritive substance in the water body through taking shellfish away; 5. nutritive substance is absorbed by waterplant (algae and pasture and water); Sedimentary chip is ingested by chip feeding habits zoobenthos snail and shrimps after the waterplant death; Directly fish for or eaten up by predacious fish again, take the nutritive substance in the water body away through fishing for predacious fish.Simultaneously, a large amount of secondary oxygen of some gram algae materials of submerged plant release itself and generation can suppress algae grows.Therefore,, can effectively control the quantity of algae in the water body, make water body keep higher transparency through the operation of above 5 nutrition short chains.
Repair the practical implementation process that the present invention utilizes the integrated body eutrophication method of anhydrating of aquatic ecosystem of setting forth in conjunction with the big shallow lake of actual items case lake water environmental ecology.This project is through artificial constructed aquatic ecosystem; Utilize hydrobiont inherent trophic cascade relation; Aquatic zoobenthos, fish and the waterplant of configuration tool water purification function are set up food short chain efficiently, through results catches or hand harvest waterplant; Reduce secondary pollution, reached the purpose of quick removal or reduction water nutrition material.Through ecological investigation of field condition and laboratory experiment,, further formulate the ecological fishery water conservation strategy of big shallow lake lake water matter management of long-term and maintenance in conjunction with on-the-spot water quality, ecological index detected result.
Specifically comprise following measure:
1) 5 food short chains of design of graphics 1,2, the efficient nutritive substance of removing the Da Dian lake fast.
2) through the fish labelling method; Record and increase weight to the 200-300g/ tail silver carp summer flower (specification 5g/ tail) in the December, 2007 of throwing in August, 2006; Summer flower fry injected volume is 215 kilograms, reaches 8062 kilograms by 70%, 2008 year 8 opah body weight gains of surviving rate; Nutritive substance shifts through the fish body can make big shallow lake Lake Water Body total nitrogen content decline 0.174mg/L, total phosphorous decline 0.0458mg/L.
3) carried out the dynamics research of submerged plant to nutritive substances such as nitrogen phosphorus in the laboratory, content comprises:
A. the Analysis of Nutritional of submerged plant comprises analysis of moisture content, coarse ash mensuration, determination of total nitrogen content and total phosphorus determination;
B. phosphorus and nitrogen release conditions research after the submerged plant death;
C. submerged plant is to nitrogen phosphorus nutrition element absorption, assimilation, storage case study in the water body.
Submerged plant Analysis of Nutritional result shows that the average nitrogen content of several kinds of submerged plants (dry weight) is 3.116%, and average phosphorus content is 0.506%, plants area (83600m according to big shallow lake Lakers work post
2), thoroughly gather in a submerged plant and can make big shallow lake Lake Water Body total nitrogen content decline 0.403mg/L, total phosphorous decline 0.0473mg/L.
Submerged plant sees table 1 to the absorption experiment result of nitrogen phosphorus, and to the removal amount of nitrogen phosphorus in the water body and the cultivated area of various pasture and water, establishing biomass of submerged plant is 200g/m according to submerged plant growth
2, then the process of growth through plant can make total nitrogen content decline 0.0125mg/1 in the Lake Water Body of big shallow lake, total phosphorous decline 0.00455mg/L.
Table 1 submerged plant increases the removal amount (mg/g) of the bright amount of 1g to nitrogen phosphorus
Decomposition experimental result according to after the submerged plant death shows: the interior phosphorus content of body discharges in 1 week and finishes after the submerged plant death, and nitrogen content then discharged in 1 month and finishes; Thereby draw Da Dian lake submerged plant fully death promptly begin harvesting or herd to support herbivorous fishes and ingest.
4) through fish in the artificial aquatic ecosystem and submerged plant can remove Da Dian lake TN, TP content is:
Table 2 fish, careless removal amount to N, P
Actual effect:
1) after the embodiment of the present invention method, the lake water matter of forming sediment greatly be improved significantly.
Implement artificial ecosystem through Da Dian lake relatively and repair before the source quality and repair the back water-quality ratio, the result shows that repairing big shallow lake, back lake water matter reaches national water environment quality standard III-IV class water quality standard, and water grade is IV-bad V before repairing.The result shows, the anhydrate method of body eutrophication of the artificial aquatic ecosystem that this project is set up makes big shallow lake lake water matter improve 1-2 grade (seeing table 3) effectively.
Water-quality ratio before and after the big shallow lake of table 3 Lakers worker aquatic ecosystem was repaired
Relatively discovery through river course, Dianshan Lake average same period water quality outside (average during the 2006.7-2007.8) water quality and the Da Dian lake after the restoration of the ecosystem of Da Dian lake; The water grade that the water grade in Da Dian lake is in II-IV, outer river course is that the water grade of V-bad V, Dianshan Lake is IV-bad V; The result shows: the water quality in Da Dian lake obviously is superior to contiguous waters, and neighbour nearly waters exceeds 2-3 water grade (seeing table 4).
The comparison of big shallow lake lake water matter and outer river course, Dianshan Lake water quality condition during table 42006 year August in year July-2007
Water-quality determination result month by month after setting up through the big shallow lake Lakers worker ecosystem relatively finds that the effect that water quality is purified gradually is very obvious, and water quality keep relative stability basically (seeing table 5).Successfully utilize the biological self-purification of artificial constructed aquatic ecosystem, reached quick removal and reduced the purpose of big shallow lake Lake Water Body nutritive substance.
The water quality monthly variation that the big shallow lake of the table 5 Lakers worker ecosystem is repaired
2) blue-green alga bloom is effectively suppressed.
After the integrated body eutrophy measure of anhydrating of artificial ecosystem, chlorophyll a is from the 40-60g/m of beginning
3Drop to comparatively stable 20-30g/m
3, do not have blue-green alga bloom to break out in continuous 3 years.
Quantitative result:
1) growth of the Da Dian lake filter-feeding fish of putting in a suitable place to breed through 1.5 years can make the water body total nitrogen concentration 0.174mg/L that descends at least, total phosphorous decline 0.0458mg/L.
2) submerged plant of Da Dian lake plantation, harvesting once can make water body total nitrogen content decline 0.416mg/L, total phosphorous decline 0.0519mg/L.
This of the inventive method technology has been applied to restoration of the ecosystem engineerings such as Canal Town Da Dian lake, the luxuriant She Shan of generation villa garden, Songjiang, Shanghai water system, the luxuriant Kunshan of generation dish arm of lake; Make Small and Medium Sized repair water area water-quality and bring up to the III class by original IV-V class; Transparency is brought up to 1.0～1.5m by 0.3 original～0.5m, and the blue-green alga bloom phenomenon never takes place so far in the project implementation.
Utilize the inventive method all can not the people than big scale (800 mu), water level, water (flow) direction, flow velocity being the engineering practice that eutrophication is gone in the open waters controlled; Obtained remarkable effect: not only successfully suppress the outburst of blue-green alga bloom; And the water quality after handling reaches III-IV water quality standard by V class to the bad V class of water inlet, and kept water quality basicly stable.This has played important reference function to other than the regulation of the open water body water surrounding of big scale, the restoration of the ecosystem of eutrophication water with newly excavate landscape water body go be with a wide range of applications aspect the eutrophication Ecological Disposal.
The above embodiment has only expressed embodiment of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to claim of the present invention.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the present invention's design, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with accompanying claims.
Claims (11)
1. the method for body eutrophication of anhydrating is characterized in that, comprises the steps:
Hydrobiological structure of community in the investigation water body according to this investigation result, is found out missing link or chain rupture link in the food chain, and is adjusted food chain with this, and inflation method comprises:
In water body, put predacious fish in a suitable place to breed or take the medicine mode, remove raw fish and herbivorous fishes in the water body, adjustment water body fish structure of community;
Kind planting submerged plant, floatingleaved plant and emergent at the bottom of 0～1.5m depth of water;
In water body, put filter-feeding fish, filter-feeding shellfish, chip feeding habits zoobenthos and herbivorous fishes in a suitable place to breed;
Foster herbivorous fishes are directly gathered in or herded to the submerged plant, floatingleaved plant and the emergent that grow up, fish for after submerged plant is ingested, to migrate out water body to these three types of waterplant from water body and the water-bed nutritive substance that absorbs;
Before submerged plant, floatingleaved plant, emergent death, it is gathered in;
Fish for predacious fish, filter-feeding fish, herbivorous fishes, filter-feeding shellfish and the chip feeding habits zoobenthos put in a suitable place to breed, to migrate out water body to nutritive substance.
2. the method for the body eutrophication of anhydrating according to claim 1 is characterized in that, before the kind planting submerged plant, at the peripheral floatingleaved plant of plantation earlier of submerged plant growing area, to build the water surrounding of static state relatively.
3. the method for the body eutrophication of anhydrating according to claim 1; It is characterized in that; When planting planting submerged plant; The kind of selecting earlier fish not like food and survival is easily planted as pioneer plant, when the transparency that grows up to construction when this pioneer plant and floatingleaved plant reaches 80～100cm, broadcasts in this transparency depth of water scope and plants the submerged plant that the fish happiness is eaten.
4. the method for the body eutrophication of anhydrating according to claim 6; It is characterized in that; When the depth of water surpasses 0.8 meter; Said pioneer plant is selected from and comprises watermifoil, p.malaianus or the high submerged plant of this type of water caltrop plant type, and during smaller or equal to 0.8 meter, said pioneer plant is selected from and comprises hornwort, eel grass or waterweed submerged plant in the depth of water.
5. according to the method for claim 1 or the 6 described body eutrophication of anhydrating, it is characterized in that the cultivated area of said submerged plant accounts for 20～30% of the whole water surface, planting density be 60～80 strains/square metre.
6. the method for the body eutrophication of anhydrating according to claim 1 is characterized in that, said filter-feeding fish in the winter time or when putting in a suitable place to breed spring, the fingerling specification of putting in a suitable place to breed is 5 tail/jin, and stocking rate is 35～50g/m
3
7. the method for the body eutrophication of anhydrating according to claim 1 is characterized in that, said filter-feeding fish is when putting in a suitable place to breed summer, and the summer flower fry specification of putting in a suitable place to breed is 4000 tail/kilograms, and stocking rate is 2～30,000 tail/mus.
8. the method for the body eutrophication of anhydrating according to claim 1 is characterized in that, the said filter-feeding shellfish of putting in a suitable place to breed comprises hydriopsis cumingii, anodonta woodiana pacifica or cristaria plicata, and stocking rate is 20～50g/m
3
9. the method for the body eutrophication of anhydrating according to claim 1 is characterized in that, the said chip feeding habits zoobenthos of putting in a suitable place to breed comprises shrimps or snail.
10. the method for the body eutrophication of anhydrating according to claim 1 is characterized in that, reaches 50% in the submerged plant cover degree and adopts when above net cage to herd foster mode to put herbivorous fishes in a suitable place to breed.
11. the method for the body eutrophication of anhydrating according to claim 4 is characterized in that, said fish are fished for after putting in a suitable place to breed, to prohibit fishing and carried out later in 3 years, and benefit is put the fish density of fishing for, the realization multiple stocking and multiple fishing.
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