CN102084842B - Method for controlling algae in freshwater pond by cultivating mullets - Google Patents
Method for controlling algae in freshwater pond by cultivating mullets Download PDFInfo
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- CN102084842B CN102084842B CN 200910199740 CN200910199740A CN102084842B CN 102084842 B CN102084842 B CN 102084842B CN 200910199740 CN200910199740 CN 200910199740 CN 200910199740 A CN200910199740 A CN 200910199740A CN 102084842 B CN102084842 B CN 102084842B
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Abstract
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 that the 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 desalting treatment 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.
Description
Technical field
The present invention relates to a kind of method for treating water, being specifically related to a kind of offshore river mouth marine fishes and moving and support the method for controlling algae content in nature eutrophication poisons in freshwater, is be applicable in the eutrophic water body environment such as reservoir, pond, artificial wet land system prevention and control the method that high algae water occurs.
Background technology
Due to the excessive input natural water of the nutriments such as nitrogen, phosphorus, the natural water eutrophication is more and more serious, and pond culture feeds intake many, and ight soil and residual bait accumulate in a large number, cause algae excessive growth in water, annual autumn in summer high temperature season, algae excessive growth in water, blue-green algae is broken out again and again in pond culture, stench is unpleasant, water quality deterioration, the ecosystem is unbalance, affects fish production.
Present algae control method both domestic and external has three classes: a class is easily to cause secondary pollution and chemical method residual but instant effect; One class is the very high Physical of cost of wasting time and energy; Also having a class is bioanalysis, bioanalysis because of except the algae cost low, there is no accessory substance and receive increasing concern, its basic principle is the growth of adopting special organism control algae or controlling its food chain constituent.In biological method, indigenous water plants recovery rate in the heavier water body of Eutrophic Extent is always not high, and the exotic plants such as Eichhornia crassipes can be caused species invasion, uses the control of microorganisms algae to have health risk and ecological risk.Abroad by throwing in predacious fish or manually fishing for the fish that remove food zooplankton in water body, the population quantity that improves zooplankton in water body controls algae content, and the method effect in the large water surface and deep water body is not obvious, and success rate is not high.Domesticly directly filter in drinking water algae and control algae by putting the filter-feeding fishes such as silver carp, flathead in a suitable place to breed, but because silver carp, flathead only can effectively filter food to macro, Microalgae but increases rapidly, and is higher before often making Measures of Algae in Water Body aggregate level and chlorophyll concentration process.In recent years, the breeding environment cleaning project is carried out rapidly, its core is take water plants, filter feeder and substrate deposition refuse is had the Detritivorous animal of the effect of ingesting as clean biometric, strengthen the environment cleaning function, reduce the pollutant levels of breeding environment and existence water body, reach the degree of depth, thoroughly control the purpose of algae.
Mullet (Liza haematocheila) is a kind of offshore river mouth marine fishes, can only breed in seawater, but grow through arriving in fresh water after progressively desalination is raised and train, take algae and detritus material as food.In patent documentation, so far there are no moves to support be used as clean biometric in the fresh water environment of pond, and the environment of purifying waste water is controlled the report of blue algae bloom.
Summary of the invention
The object of the invention is to overcome existing pond culture water technology lacks, blue-green algae is broken out the actual conditions that affect fish production again and again, a kind of method for controlling algae in freshwater pond by cultivating mullets is provided, the method cost is low, simple to operate, there is not secondary pollution, the detritus material of eating in filter food algae due to mullet, more thorough than silver carp, flathead purified treatment effect; They can only be grown in fresh water and irreproducible, can not bring species invasion, when purifying water, can also increase than silver carp, the flathead aquaculture products of high-quality more, increase economy and social value.
The present invention is achieved through the following technical solutions: a kind of method for controlling algae in freshwater pond by cultivating mullets, move in Aquacultural water and support mullet; Move and process through desalination progressively before supporting, allow them adapt to fresh water living environment, the specification of desalination is the fingerling in cultivation 24 months, and best total length is 2-5 centimetre, then takes nearby or remote surviving transportation method is transferred in the water environment that needs to purify and be cultivated; Moving foster fish moves foster by different age gradings or mixing; According to propagation mullet density situation of biomass in water environment catch year by year stay greatly little; Move foster zone and comprise inland pond culture water environment, move foster purpose and comprise control algae content, improve water quality, increase water transparency and increase output of aquatic products.
The present invention is completed by following steps: the 1. desalination of mullet: move the mullet of 1-24 month monthly age size foster in specific Cultivation container, guarantee that dissolved oxygen is sufficient, then progressively add fresh water, exclusive segment degree of saltiness water, reduce the salinity of cultivation water environment, make the mullet fry and fingerling adapt to the freshwater aquiculture environment fully; Desalination best age specification is the 1-6 monthly age month, desalination required time 1-15 days, and the monthly age, larger desalination speed was slower; 2. the mullet fry and fingerling that has adapted to the freshwater aquiculture environment nearby or remote On Transportaion of Live to eutrophication water, put in a suitable place to breed by monthly age or a size fractionation minute pond; 3. move the mullet fry and fingerling of supporting the pond, every mu of area of the fry of 2-5 centimetre is put the 50-500 tail in a suitable place to breed, allow its self-sow breed, in environment, the capacity of every cubic metre reaches the 10-300 gram, can filter up hill and dale the food algae, detritus material in the water environment of eating reaches the purpose of more thoroughly controlling algae, fishes for when the fish body weight surpasses 1000 grams and every cubic metre of environmental capacity greater than 300 gram.
Advantage of the present invention and beneficial effect are:
1. the present invention compares with existing algae control method, has a cost low, simple to operate, does not have secondary pollution, and the mullet of introduction is irreproducible in fresh water, does not have the ecological risk of alien species invasion.Fish for simultaneously the mullet of results and take part detritus material in the nutritive salt such as algae, a part of nitrogen phosphorus and substrate in water out of water environment, purifying water body also can produce certain additional economic benefit more up hill and dale.
2. benefit of the present invention is to utilize the mullet of introducing to eat algae simultaneously in filter, the detritus material of also eating, and more thoroughly environment purification, more effectively reduce the algae bio amount, reaches the purpose of controlling algae content and alleviating eutrophication.
3. in the present invention, mullet is Detritivorous fish, play the effect of desilting in the ecosystem, organic matter in the freshwater sediments is transported in water, makes the more optimized structure of matter and energy circulation in the ecosystem with rationally, additionally increase the output rating of freshwater Organic Matter In Sediments.
4. unit of water body is required during algae moves foster fish quantity than additive method still less in control in the present invention, reduces the carrying difficulty.
Embodiment
The present invention is described in further detail by following embodiment, but the technology contents that this embodiment is narrated is illustrative, rather than determinate, should not limit to protection scope of the present invention with this.
Embodiment 1: a kind of method for controlling algae in freshwater pond by cultivating mullets, move in the pond water breeding water body and support mullet; Move and process through desalination progressively before supporting, allow them adapt to fresh water living environment, the specification of desalination is the fingerling in cultivation 24 months, and best total length is 2-5 centimetre, then takes nearby or remote surviving transportation method is transferred in the water environment that needs to purify and be cultivated; Move foster by different age gradings or mixing; According to propagation mullet density situation of biomass in water environment catch year by year stay greatly little; Move foster zone and comprise inland pond culture water environment, move foster purpose and comprise control algae content, improve water quality, increase water transparency and increase output of aquatic products.
Embodiment 2: present embodiment comprises that particular content is the 1. desalination of mullet: move the mullet of 1-24 month monthly age size foster in specific Cultivation container, guarantee that dissolved oxygen is sufficient, then progressively add fresh water, exclusive segment degree of saltiness water, reduce the salinity of cultivation water environment, make the mullet fry and fingerling adapt to the freshwater aquiculture environment fully; The desalination best age is the 1-6 monthly age month, desalination required time 1-15 days, and the monthly age, larger desalination speed was slower; 2. the mullet fry and fingerling that has adapted to the freshwater aquiculture environment nearby or remote On Transportaion of Live to eutrophication water, put in a suitable place to breed by monthly age or size fractionation; 3. move the mullet fry and fingerling of supporting the pond, every mu of area of the fry of 2-5 centimetre is put the 50-500 tail in a suitable place to breed, allow its self-sow breed, in environment, the capacity of every cubic metre reaches the 10-300 gram, can filter up hill and dale the food algae, detritus material in the water environment of eating reaches the purpose of more thoroughly controlling algae, fishes for when the fish body weight surpasses 1000 grams and every cubic metre of environmental capacity greater than 300 gram.The present embodiment utilization moves foster mullet filter food algae and the humus of eating, and is more abundant except algae from the more profound large water surface water body of eutrophication that makes, and purifies more thorough.Experimental result shows, extra increase move support mullet after, the algae average removal rate is 92.6%.
Embodiment 3: present embodiment and embodiment 2 differences are that mullet seedling control algae is added in the pond culture of 1.5 meters of mean depth of water, move and support 2-5 centimetre of mullet, the total quantity of every mu of immigration is the 100-300 tail, can effectively control algae content in pond waters, algae content reduces 70%-90% than the contrast water body, effectively control the outburst of eutrophic water body blue-green alga bloom the anniversary, avoided the blue algae bloom growth.
Embodiment 4: present embodiment is added mullet fingerling control algae with the pond culture that enforcement 2 differences are 1.5 meters of mean depth of water, move and support 100 1 300 gram mullets, the total amount of every mu of immigration is the 10-50 kilogram, can effectively control algae content in pond waters, algae content reduces 80%-90% than the contrast water body, effectively control the outburst of eutrophic water body blue-green alga bloom the anniversary, avoided the blue algae bloom growth.
This programme moves foster zone and comprises inland pond culture water environment, moves foster purpose and comprises control algae content, improves water quality, increases water transparency.
Claims (5)
1. method for controlling algae in freshwater pond by cultivating mullets is characterized in that: comprise the following steps:
1. the desalination of mullet: move the mullet of 1-24 month monthly age size foster in specific Cultivation container, guarantee that dissolved oxygen is sufficient, then progressively add fresh water, exclusive segment degree of saltiness water, reduce the salinity of cultivation water environment, progressively make the mullet fry and fingerling adapt to the freshwater aquiculture environment fully, desalination required time 1-15 days;
2. the mullet fry and fingerling that has adapted to fresh water environment nearby or remote On Transportaion of Live to eutrophication water, put in a suitable place to breed by monthly age or total length size fractionation;
Fish for when 3. the mullet body weight surpasses 1000 grams and every cubic metre of environmental capacity greater than 300 gram;
4. move foster mullet and can filter up hill and dale the food algae, effectively control algae content in pond waters, algae content reduces 70%-90% than the contrast water body.
2. method for controlling algae in freshwater pond by cultivating mullets according to claim 1 is characterized in that: the mullet best age of selecting to be desalinated is the 1-6 monthly age month.
3. method for controlling algae in freshwater pond by cultivating mullets according to claim 1 is characterized in that: after desalination, every mu of area of mullet fry of 2-5 centimetre is put the 50-500 tail in a suitable place to breed, allows its self-sow propagation, and in environment, the capacity of every cubic metre reaches the 10-300 gram.
4. method for controlling algae in freshwater pond by cultivating mullets according to claim 1 is characterized in that: add mullet seedling control algae in the pond culture of 1.5 meters of mean depth of water, move and support 2-5 centimetre of mullet, the total quantity of every mu of immigration is the 100-300 tail.
5. method for controlling algae in freshwater pond by cultivating mullets according to claim 1 is characterized in that: add mullet fingerling control algae in the pond culture of 1.5 meters of mean depth of water, move and support 100-300 gram mullet, the total amount of every mu of immigration is the 10-50 kilogram.
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| CN 200910199740 CN102084842B (en) | 2009-12-02 | 2009-12-02 | Method for controlling algae in freshwater pond by cultivating mullets |
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| CN 200910199740 CN102084842B (en) | 2009-12-02 | 2009-12-02 | Method for controlling algae in freshwater pond by cultivating mullets |
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| CN102084842B true CN102084842B (en) | 2013-06-12 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103782929A (en) * | 2012-11-05 | 2014-05-14 | 上海能正渔业科技开发有限公司 | Method for colonizing and releasing seawater mullets in public freshwater area |
| CN103803708B (en) * | 2012-11-08 | 2015-12-16 | 上海能正渔业科技开发有限公司 | Inland eutrophication freshwater method is repaired in the purification of seawater mullet |
| CN104322409A (en) * | 2014-10-20 | 2015-02-04 | 苏州苏湘特种水产养殖场 | Cost-reduced pike aquaculture method |
| CN104355416A (en) * | 2014-12-04 | 2015-02-18 | 上海能正渔业科技开发有限公司 | Algae-controlling and water-purifying biocenosis |
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2009
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