Method for controlling algae in eutrophic freshwater body by cultivating Xenocyprinae fishes

A technology of eutrophication and freshwater aquaculture, applied in the field of water treatment, to achieve the effect of reducing algal biomass, increasing output rate, and no secondary pollution

Inactive Publication Date: 2011-10-12
SHANGHAI NENGZHENG FISHING TECH DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, there have been no reports in patents and literature that transplanted to freshwater eutrophication ponds for cleaning organisms, purifying the water environment, and controlling cyanobacteria outbreaks

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1: A kind of algae control method of transplanting and cultivating Pomfret subfamily fish in eutrophic freshwater water body, transplanting and raising Pomfret subfamily fish in the pond culture water body; Allow Pomfret subfamily fish to adapt to freshwater eutrophication life before transplanting Environment, the size of the transplanted fish is 2-5 cm in length or within 24 months of breeding, and then transported to the eutrophic water environment that needs to be purified by the nearest or long-distance transport method; when transplanting, press Different age classification or mixed transplantation; according to the biomass density of the proliferating pomfret subfamily fish in the water environment, the larger ones are caught and the smaller ones are kept year by year.

Embodiment 2

[0018] Embodiment 2: This embodiment includes specific content as 1. the transplanting of the subfamily of pomfret fish: transplanting the subfamily of pomfret fish of the age of 1-24 months into a specific culture container to ensure sufficient dissolved oxygen, so that Pomfret subfamily fish fry fully adapt to the freshwater eutrophic aquaculture environment; the best size for transplanting is 1-6 months old, and the older the month, the more difficult it is to transplant; ② Pomfret that have adapted to the freshwater eutrophic aquaculture environment Subfamily fish fingerlings are transported to eutrophic water bodies nearby or at a long distance, and stocked according to age or size; Stock 50-500 tails per mu area, let them grow and proliferate naturally, and the capacity per cubic meter in the environment can reach 10-300 grams, which can completely swallow algae and decaying substances in the water environment, so as to achieve the purpose of more thorough algae control ...

Embodiment 3

[0019] Embodiment 3: the difference between this embodiment and Example 2 is that the average water depth of 1.5 meters of pond culture adds pomfret subfamily fry to control algae, and transplants 2-5 cm pomfret subfamily fish, and the total quantity per mu moved in is 100- 300 tails can effectively control the algae content in the pond water body, and the algae content is reduced by 70% compared with the control water body. The anniversary effectively controls the outbreak of cyanobacteria blooms in eutrophic water bodies and avoids the outbreak of cyanobacteria in aquaculture water bodies.

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PUM

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Abstract

The invention discloses a method for controlling algae in eutrophic freshwater body by cultivating Xenocyprinae fishes, relating to a water treatment method. Aiming at the problem that blue-green algae frequently outbreaks in the eutrophic freshwater body during pond cultivation, Xenocyprinae fishes only propagating in a mountain stream running water environment are introduced for eating algae and detritus matters at the same time so as to achieve the purpose of thoroughly purifying the cultivating environment in the eutrophic freshwater body. The method is characterized in that the Xenocyprinae fishes are cultivated in the eutrophic freshwater body; before cultivation, fingerlings are specified to be within 24 months old and are transferred to the pond to be purified by using a keep-alive transportation method, and the big Xenocyprinae fishes are caught and small ones are reserved yearly according to the density of the Xenocyprinae fishes cultivated in the water environment. By use of the method, the algae content in the eutrophic freshwater body for cultivating can be effectively reduced, and nitrogen and phosphorus nutritive salts in the water and humus in the bottom mateiral are brought out of the water body by harvesting the proliferous Xenocyprinae fishes, so that the quality of the water body for cultivating is greatly improved, and the algae outbreak is controlled.

Description

technical field [0001] The invention relates to a water treatment method, in particular to a method for transplanting fish in mountain streams into eutrophic freshwater water bodies to control algae content, and is suitable for inland reservoirs, mountain ponds, ponds, artificial wetland systems, and water sources A method for preventing and controlling the occurrence of high-algae water in nutrient-rich freshwater environments such as underground reservoirs and lakes. Background technique [0002] Due to the excessive input of nutrients such as nitrogen and phosphorus into natural water bodies, the eutrophication of natural water bodies is becoming more and more serious. The ponds are fed with a lot of feed, and a large amount of feces and residual bait accumulate. Every summer and autumn high temperature season, the algae in the water grow excessively, and the cyanobacteria blooms frequently break out. Bad smell, deteriorating water quality and unbalanced ecosystem affect ...

Claims

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Application Information

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IPC IPC(8): C02F3/32
Inventor 阳清发杨武
Owner SHANGHAI NENGZHENG FISHING TECH DEV CO LTD
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