Method for controlling algae in freshwater pond by cultivating mullets

A pond and barracuda technology is applied in the field of water treatment to achieve the effects of reducing algal biomass, reducing the difficulty of handling, and reducing eutrophication

Active Publication Date: 2011-06-08
SHANGHAI NENGZHENG FISHING TECH DEV CO LTD
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  • Summary
  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

In the patent literature, there has been no report of transplanting it into the freshwater environment of the

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment 1: A kind of algae control method for transplanting barracuda in freshwater ponds, transplanting barracudas in the water body of pond aquaculture; before transplanting, they are gradually desalinated to allow them to adapt to the freshwater living environment, and the desalinated specification is to breed for 24 months The fish species within the range, the best overall length is 2-5 cm, and then adopt the nearest or long-distance transportation method to keep alive and transfer to the water environment that needs to be purified for breeding; grade or mix transplantation according to different ages; The density of biomass in the water environment increases and decreases year by year.

Embodiment 2

[0015] Embodiment 2: This embodiment includes the specific content of 1. the desalination of barracuda; transplanting the barracuda with the age of 1-24 months into a specific culture container to ensure sufficient dissolved oxygen, and then gradually add fresh water to remove part of the salty water. Fresh water, reduce the salinity of the aquaculture water environment, so that the barracuda fingerlings can fully adapt to the freshwater aquaculture environment; the best age for desalination is 1-6 months, and the desalination takes 1-15 days. The older the age, the faster the desalination speed. slow; ②The barracuda fingerlings that have adapted to the freshwater aquaculture environment are transported to eutrophic water bodies nearby or long distances, and stocked according to the age or size; 50-500 fish fry per acre of centimeters are stocked to allow them to grow and proliferate naturally. The capacity of each cubic meter in the environment is 10-300 grams, which can compl...

Embodiment 3

[0016] Embodiment 3: the difference between this embodiment and Example 2 is that the average depth of 1.5 meters of pond culture adds barracuda fry to control algae, and transplants 2-5 centimeters of barracudas. The total number of per mu that moves in is 100-300 tails, which can effectively Control the algae content in the pond water body, and the algae content is reduced by 70%-90% compared with the control water body. Anniversary effectively controls the outbreak of cyanobacteria blooms in the eutrophic water body and avoids the growth of cyanobacteria.

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PUM

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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 thatthe 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 desaltingtreatment 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 [0001] The present invention relates to a water treatment method, in particular to a method for controlling the content of algae in natural eutrophic freshwater water bodies by transplanting marine fishes in coastal estuaries, and is suitable for eutrophic water body environments such as reservoirs, ponds, and artificial wetland systems. Methods to prevent and control the occurrence of high algae water. 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 are accumulated, resulting in excessive growth of algae in the water. Every summer and autumn high temperature season, the water algae grow excessively. Frequent outbreaks of blue-green algae in ponds, foul smell, deteriorating water quality, and unbalanced ecosystem affect ...

Claims

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Application Information

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IPC IPC(8): A01K63/04C02F3/32
Inventor 阳清发陈洪斌
Owner SHANGHAI NENGZHENG FISHING TECH DEV CO LTD
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