Alga control method for freshwater environment based on cultivation of barracudas and mullets

A water environment and fresh water technology, applied in the field of water treatment, can solve the problems of transplanting to lakes, rivers, reservoirs, ponds, artificial wetlands and other problems that have not been seen so far, and achieve the effects of controlling cyanobacteria blooms, simple operation, and reducing difficulty in transportation

Active Publication Date: 2011-05-04
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 the patent literature that it has been transplanted into lakes, rivers, reservoirs, ponds, artificial wetlands and other freshwater environments 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

[0016] Embodiment 1: Transplanting barracuda and mullet in freshwater environment The algae control method is to transplant at least one of barracuda and mullet in a eutrophic freshwater environment. Before transplanting, they are gradually desalinated to allow them to adapt to the freshwater living environment. The desalinated fish species are 2-5 cm in length or within 24 months of breeding, and then they are transferred to the nearby or long-distance preservation transportation method to the place that needs to be purified. Breeding in water environment, no feed is fed during the breeding process. In the water body with large water surface, meshes are used to divide the enclosure. The size of the mesh is to ensure that the transplanted fish cannot escape as a standard. The mesh is checked regularly to prevent the mesh from being damaged. The transplanted pike and mullet are graded or mixed according to different ages, and silver carp and bighead carp are transplanted and mu...

Embodiment 2

[0017] Embodiment 2: the freshwater environment transfers pike and mullet to control algae. The method for controlling algae includes specific implementation contents as 1. desalination of pike and mullet: transplanting pike and mullet of 1-24 months of age to specific breeding In the container, ensure sufficient dissolved oxygen, then gradually add fresh water, remove part of the brackish water, reduce the salinity of the aquaculture water environment, and make the barracuda and mullet fry fully adapt to the freshwater aquaculture environment; the best specification for desalination is from January to June The age of the month, the time required for desalination is 1-15 days, the older the month, the slower the desalination speed; ②At least one or two groups of barracuda and mullet fry species that have adapted to the freshwater aquaculture environment are closest to each other in any proportion Or long-distance transport to eutrophic water bodies, stocking in grades according...

Embodiment 3

[0018] Embodiment 3: The difference between this embodiment and Embodiment 2 is the transplanting method: at least one of the barracuda and mullet fry species that have adapted to the freshwater aquaculture environment is transported to the eutrophic water body nearby or at a long distance, according to Age or size classification or mixed non-graded stocking. When grading and stocking, ensure that the mesh size of the enclosure mesh is suitable to prevent small-size fry from entering the enclosure of large-size fry or escaping, which is convenient for later fishing; Close to the reservoir bay to isolate a certain area environment, stock small-sized fry and fingerlings, and use large-sized meshes to enclose a wider area in an area far away from the reservoir bay, stock large-sized fish species over 6 months old, and the fish body exceeds 1,000 grams And when the environmental capacity per cubic meter is greater than 300 grams, selective fishing can be carried out. Large individu...

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PUM

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Abstract

The invention discloses an alga control method for a freshwater environment based on cultivation of barracudas and mullets, relating to a water treatment method. Aiming at solving the problem that algae can not be stably and thoroughly controlled in a eutrophic fresh water body, the method comprises the following steps: at least introducing one species of estuarine/marine fishes, such as barracudas and mullets which can only be propagated in sea water, and carrying out desalination processing before cultivation to enable the barracudas and the mullets to be adapted to a freshwater living environment, wherein the mesh size in the large water body ensures whether the cultivated fishes can escape; dividing or mixing according to different ages, carrying out culture in enclosure in girds by meshes, and simultaneously cultivating and propagating silver carps, bighead carps, other local fishes and local shellfish; and propagating local common aquatic plants. Thus, the fishes can be fed on the algae in a filter-feeding mode and simultaneously swallow detritus substances, thereby achieving the purpose of thoroughly purifying the water environment. By harvesting the cultivated and propagated aquatic organisms to remove nitrogen/phosphorus nutrients in water and humus in bed material from the water body, the method disclosed by the invention greatly improves the water quality of the cultivation water body.

Description

technical field [0001] The invention relates to a water treatment method, in particular to a method for transplanting marine fishes in near-shore estuaries to control algae content in natural eutrophic freshwater water bodies, and is suitable for lakes, river courses, reservoirs, ponds, landscape water bodies, and artificial wetlands. A method for preventing and controlling the occurrence of high algae water in eutrophic freshwater water environment such as system. 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, resulting in the excessive growth of algae in the water, the deterioration of water quality, and the imbalance of the ecosystem, which affects the normal production of water plants and restricts the human demand for low-algae raw water. . [0003] At present, there are three types of algae control methods at h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/32A01K61/00
CPCY02A40/81
Inventor 阳清发
Owner SHANGHAI NENGZHENG FISHING TECH DEV CO LTD
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