CN101412563A - Blue algae bloom control method based on floating rice cultivation - Google Patents
Blue algae bloom control method based on floating rice cultivation Download PDFInfo
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- CN101412563A CN101412563A CNA200810162518XA CN200810162518A CN101412563A CN 101412563 A CN101412563 A CN 101412563A CN A200810162518X A CNA200810162518X A CN A200810162518XA CN 200810162518 A CN200810162518 A CN 200810162518A CN 101412563 A CN101412563 A CN 101412563A
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Abstract
The invention discloses a cyanobacteria bloom control method based on the cultivation of floating rice. Rice sprouts at 5-trifoliate stage are fixed on a polystyrene foam board by a sponge, then the polystyrene foam board floats on a water body which needs to be controlled for cultivation, rice is duly harvested, and the polystyrene foam board is recovered. The cyanobacteria bloom control method can effectively control water bloom in lakes; and the cyanobacteria bloom control method is applied to ensure that the count of blue-green algae cells in eutrophic water bodies of the lakes is decreased to less than 1,000 ml<-1> within ten days in summer, thereby apparently improving the water quality of the eutrophic water bodies.
Description
Technical field
The present invention relates to eutrophication water blue algae wawter bloom control techniques, especially, relate to a kind of method with floating rice cultivation technology control blue-green alga bloom.
Background technology
Body eutrophication (Water Eutrophication) is a kind of water body aging phenomenon.When the eutrophication phenomenon appearred in water body, planktonic organism bred in a large number, and the water surface often presents blueness, redness, brown, oyster white, decided on dominant planktonic color.This phenomenon is called " wawter bloom " (Water Bloom) in rivers and lakes, marine being called " red tide " (Red Tide).
Lake eutrophication is a common problem, and developed countries such as America and Europe just once ran into same situation in early days in industrialization.At present, except that developed country, China, India, Brazil, Paraguay and Philippines, Thailand etc. also all are faced with the problem of lake eutrophication.Lake eutrophication is that China quite grows the great water environmental problems in one period at present and from now on.
Owing to lack practicable technology, wawter bloom control in lake is still a worldwide difficult problem.Just because of this, although China is carrying out many inputs aspect the wawter bloom control of lake, the outburst of lake (comprising Taihu Lake) wawter bloom is the trend that increases of frequence of exposure and intensity on the contrary.
The wawter bloom preventing and controlling are systems engineerings, at present can thoroughly effectively remove harmful algae in the water without any single biology, chemistry and physical measure.In order to remove algal tufa, numerous domestic and international experts has dropped into effort for many years, has studied the method that the various control algal tufa breaks out, as chemical method, mechanical process, biological process, ecological method and flocculence or the like.Some treatment measures in theory or feasible under certain conditions, but actually or on a large scale, then often do not reach expected effect, all there is certain limitation in various treatment technologies.The concrete measure of preventing and treating wawter bloom at present has following several:
1 physical method
With the method for machinery results algae,, and control algae, the pipeline of cut-out nutrition in algae species succession process with microorganism predation modes such as (planktonic organism or fish) with gac or clay flocculation precipitation.The nitrogen phosphorus nutrient that the method for physics can not fundamentally reduce water body just takes stopgap measures and does not effect a permanent cure.
2 biological methods
Using has microorganisms such as specificity infects, cracked virus, bacterium, fungi to blue-green algae, utilizes them effects such as the degraded of nitrogen phosphorus or Competition for Nutrients to be reached the effect that suppresses blue algae growth.But the specificity of bacterium, fungi is relatively poor, and efficient is also lower.Also can utilize the ecological characteristics of blue-green algae to carry out gene controls the algae genetically engineered and administers and control algal bloom.What is more important no matter which kind of special microorganism all should be considered its effect to the biology of pond ecosystem, should prevent " secondary pollution " especially.
3 allelopathies
The rival is by discharging the compound inhibition or promoting the effect pavilion that other species are grown.Such as the Microcystis aeruginosa allelopathy, be exactly mainly study some common waterplant in its growth the excretory compound to the restraining effect of the growth of Microcystis aeruginosa.
4 chemical processes
(claim algicide, algicide) kill algae, this is the easiest solution to use chemical agent.Oneself algicide synthetic and that filter out has at present: organism such as rosin amine, three azine derivatives, organic acid, aldehyde, ketone and quaternary ammonium compound, the inorganicss such as precipitation agent of mantoquita (copper sulfate, cupric oxide), potassium permanganate, phosphorus.At present, the exploitation of nontoxic, efficient, economic algicide is in and explores (Wang Lingling etc., 2007) among the development.
5 additive methods
Can be sprayed onto in the water body by some being had the multi-functional algae-inhibiting agent that contains the composite parts of biological and chemical, suitably regulate the nutrition composition of water body, strengthen its algal control performance, and continue act on algae, control its unusual breeding.
Another it is pointed out that development of modern science and technology, no matter is scene or remote sensing monitoring or computer simulation or data transfer, has all possessed the condition that digital management was controlled in good time and lake environment was carried out to water nutrition thing level.
The above-mentioned various reason method of being in harmony respectively has its characteristics, but in the use limitation is arranged all also.If we can understand and grasp all kinds of nutritive substances biomass geochemistry character and change procedure under various conditions better, use above-mentioned the whole bag of tricks rightly, it is in the cards that water nutrition thing level and algal grown are controlled in certain scope.
Summary of the invention
The objective of the invention is at the deficiencies in the prior art, a kind of blue algae bloom control method based on floating rice cultivation is provided, can makes the blue-green algae cell numeration of nutrition-enriched water of lake in ten days, drop to 1000mL in summer (algal bloom season) with present method
-1Below, and water body nitrogen and phosphorus content are significantly descended, water quality be improved significantly.
For realizing purpose of the present invention, adopt following technical scheme: a kind of blue algae bloom control method based on floating rice cultivation, it may further comprise the steps:
(1) rice seedling with five leaf phases is fixed on the polystyrene foam plate with sponge.
(2) polystyrene foam plate is swum on the water body that need control and cultivate, polystyrene foam plate covers in the water body that need control fully.
(3) results paddy rice, and reclaim polystyrene foam plate.
The present invention with respect to the beneficial effect of prior art is:
1. the utmost point is controlled the lake wawter bloom effectively, and using the present invention can make the blue-green algae cell numeration of nutrition-enriched water of lake drop to 1000mL in ten days in summer
-1Below.
2. obviously improve the water quality of eutrophication water.
Embodiment
Improving constantly of water body concentration of nitrogen and phosphorus is the prerequisite of blue algae bloom. Phosphorus content surpasses in the water 0.3mg.L-1, then the algal grown breeding will obviously be accelerated. Whether have the scholar to propose formula calculates water body and reaches Eutrophication. The general standard of judging at present body eutrophication is: nitrogen content surpasses 0.2～0.3mg.L-1, phosphorus content is greater than 0.01～0.02mg.L-1, BOD is greater than 10mg.L-1, the algae sum surpasses 20000 cellsmL in the fresh water of pH value 7～9-1, Chlorophyll-a Content is greater than 10 μ g.L-1。
Illumination is the necessary condition of blue algae growth. Happiness illumination and high temperature are the key properties of blue-green algae, when high temperature, During high illumination, blue-green algae can Fast Growth. The content threshold value of light intensity, light intensity〉26 μ mol m-2.s-1, water temperature〉and 18.8 ℃. Climatic factor is the inducement of blue algae bloom often.
Paddy rice is best suited in one of crop of water planting, and biomass is big. Under the normal water planting condition, height can Reach 1 meter, the system of fibrous root is very flourishing, can constantly grow adventitious root, and than under the cachexia, root system can reach To half meter. Every gram dry weight paddy rice is nitrogenous to reach 2%, and phosphorus content can reach 0.2-0.4%, and these all are to repair rich battalion Fosterization water body provides favourable condition.
The present invention controls blue-green alga bloom with floating rice cultivation, and its principle is: a large amount of luminous energy of rice absorbing, and not saturating The floating plate of light more makes the algae in the water body cover, and adds paddy rice to the strong absorption of nitrogen phosphorus, thereby forms the life to algae Grow and the very disadvantageous condition of propagation, reach the purpose of effective control blue-green alga bloom.
Description of drawings
Fig. 1 is contrast water body outside drawing;
The water body outside drawing of Fig. 2 after method of the present invention is handled.
Embodiment
With the rice seedling of five leaf phases sponge stuck-at-m
2On the polystyrene foam plate of the thick 2-4cm of size, density 10cm * 10cm makes it swim on the water body that need control then, cultivates.Note the control disease and pest in the culturing process and prevent that the floating plate slippage from influencing shaded effect.Periodic monitoring water quality parameter: blue-green algae density, chlorophyll a content, dissolved oxygen, pH value, specific conductivity, water turbidity, full N, NH
4 +-N, NO
3 -N, solubility P etc.The cystose of results paddy rice, and recovery in good time is with anti-pollution.
Embodiment 1
We have investigated near the water quality of the Tai Lake in section Jia Pu town, Changxing, Zhejiang Province since in April, 2008, find to have two adjacent zones (the about 200m of area
2About) the wawter bloom occurrence degree obviously different, the blue-green algae cell numeration of regional A (the 31 ° of 06.513N in central position, 119 ° of 56.495E) is 26045 ± 3142 (n=5) cellmL
-1, and the numeration of the blue-green algae cell of area B (the 31 ° of 06.490N in central position, 119 ° of 56.516E) is 7496 ± 2695 (n=5) cell mL
-1, the advantage kind of the algae that grows in two kinds of water bodys all is the slimeball algae of Cyanophyta chromosphere Trentepohlia.Can we get top layer (0-50cm) water sample of regional A and B, transport to the glass solarium and carry out floating water planting rice test, and main purpose is: 1, analyze TAIHU LAKE and be used for the water planting paddy rice; 2, can research floating water planting paddy rice measure effectively control the generation of blue-green alga bloom and to the cleaning action of water body.Incubator is of a size of 60cm * 40cm * 20cm, and polystyrene foam plate is of a size of 60cm * 40cm * 2cm, and rice shoot was transplanted in five leaf phases, and every cystose is fixed 15 strain rice shoots, and every kind of water body is established contrast and the processing of floating water planting paddy rice, three repetitions.
As depicted in figs. 1 and 2, behind rice transplanting the 9th day, the water sample A that handles through floating water planting paddy rice can not detect chlorophyll a, and the chlorophyll a content of water sample B also becomes very low, and the chlorophyll a content of contrast A and B still maintains higher level.The water of handling with the floating water planting paddy rice of method of the present invention becomes limpid, visible significantly roof inverted image, and significantly dead algae deposition is arranged at the bottom of the case; And contrast has serious wawter bloom.
The foregoing description is used for the present invention that explains, rather than limits the invention, and in the protection domain of spirit of the present invention and claim, any modification and change to the present invention makes all fall into protection scope of the present invention.
Claims (2)
1. blue algae bloom control method based on floating rice cultivation is characterized in that it may further comprise the steps:
(1) rice seedling with five leaf phases is fixed on the polystyrene foam plate with sponge.
(2) polystyrene foam plate is swum on the water body that need control and cultivate, polystyrene foam plate covers in the water body that need control fully.
(3) results paddy rice, and reclaim polystyrene foam plate.
2. the blue algae bloom control method based on floating rice cultivation according to claim 1 is characterized in that, the density of described rice seedling is 10cm * 10cm.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA200810162518XA CN101412563A (en) | 2008-12-01 | 2008-12-01 | Blue algae bloom control method based on floating rice cultivation |
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|---|---|---|---|
| CNA200810162518XA CN101412563A (en) | 2008-12-01 | 2008-12-01 | Blue algae bloom control method based on floating rice cultivation |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102134126A (en) * | 2011-01-13 | 2011-07-27 | 浙江大学 | Method for controlling cyanobacteria bloom |
| CN102745814A (en) * | 2012-06-21 | 2012-10-24 | 浙江大学 | Preparation method for barley decomposed solution used for controlling harmful algae |
| CN104276662A (en) * | 2014-09-16 | 2015-01-14 | 江苏农林职业技术学院 | Method for purifying eutrophic landscape water body on planted floating bed |
| CN104828950A (en) * | 2015-05-08 | 2015-08-12 | 黄伟强 | Processing method of domestic sewage |
| CN108243926A (en) * | 2018-01-17 | 2018-07-06 | 广西大学 | A kind of rhizomatous ciltivating process of rice |
-
2008
- 2008-12-01 CN CNA200810162518XA patent/CN101412563A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102134126A (en) * | 2011-01-13 | 2011-07-27 | 浙江大学 | Method for controlling cyanobacteria bloom |
| CN102134126B (en) * | 2011-01-13 | 2012-07-04 | 浙江大学 | Method for controlling cyanobacteria bloom |
| CN102745814A (en) * | 2012-06-21 | 2012-10-24 | 浙江大学 | Preparation method for barley decomposed solution used for controlling harmful algae |
| CN104276662A (en) * | 2014-09-16 | 2015-01-14 | 江苏农林职业技术学院 | Method for purifying eutrophic landscape water body on planted floating bed |
| CN104276662B (en) * | 2014-09-16 | 2016-08-24 | 江苏农林职业技术学院 | The method of plant floating bed purifying eutrophic landscape water body |
| CN104828950A (en) * | 2015-05-08 | 2015-08-12 | 黄伟强 | Processing method of domestic sewage |
| CN108243926A (en) * | 2018-01-17 | 2018-07-06 | 广西大学 | A kind of rhizomatous ciltivating process of rice |
| CN108243926B (en) * | 2018-01-17 | 2020-09-08 | 广西大学 | Water culture method for underground stems of rice |
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