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Method for controlling algae in freshwater pond by cultivating striped mullets

A pond and fresh water technology, applied in the field of water treatment, to achieve the effect of reducing the difficulty of handling, optimizing and rationalizing the structure, and controlling the content of algae

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

AI Technical Summary

Problems solved by technology

In the patents and literatures, there have been no reports of transplanting into freshwater ponds for cleaning organisms, purifying water environments, and controlling cyanobacteria outbreaks.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 1: A method for controlling algae by transplanting mullet in a freshwater pond, in which mullet is transplanted in the pond culture water body; before transplanting, the mullet is gradually desalinated to allow the mullet to adapt to the freshwater living environment, and the desalinated specification is a full-length 2- 5 cm or within 24 months of breeding, and then take the nearest or long-distance transportation method to transfer to the water environment that needs to be purified for cultivation; when transplanting, they are graded or mixed according to different ages; according to the multiplication of mullet In the water environment, the biomass density is increasing and decreasing year by year.

Embodiment 2

[0017] Embodiment 2: This embodiment includes the specific content of ① desalination of mullet: transplanting mullet of 1-24 months old age 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 mullet fingerlings can fully adapt to the freshwater aquaculture environment; the best specification for desalination is 1-6 months old, and the desalination time required is 1-15 days. The older the month, the faster the desalination speed. ②Mullet fingerlings that have adapted to the freshwater aquaculture environment are transported to eutrophic water bodies nearby or long distances, and stocked according to age or size; ③Mullet fingerlings that have been transplanted to ponds, 50-500 fish fry per mu are stocked to allow them to grow and proliferate naturally. The capacity per cubic meter in the environment can reac...

Embodiment 3

[0018] Embodiment 3: the difference between this embodiment and Example 2 is that the average depth of 1.5 meters of pond culture adds mullet fry to control algae, transplants 2-5 cm mullet, and the total number of per mu is 100-300 tails, which 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, effectively controlling the outbreak of cyanobacteria bloom in the eutrophic water body. Avoid algal blooms.

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PUM

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Abstract

A method for controlling algae in a freshwater pond by cultivating striped 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 striped 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 a freshwater pond aquiculture environment is fulfilled. The method is characterized by comprising the following steps of: performing gradual desalting treatment on the striped mullets before cultivation to make the striped mullets adapt to the living environment of freshwater, wherein the age of each striped mullet is less than 24 months; transferring the striped mullets into a pond required to be purified by a keeping-alive transportation method; cultivating the striped mullets in the eutrophic freshwater pond; and catching thelarge striped mullets and keeping the small striped mullets year by year according to the density of the striped mullets in a water environment. By the method for controlling the algae in the freshwater pond by cultivating the striped mullets, the content of the algae in the eutrophic freshwater pond aquiculture water body is 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 striped mullets, the quality of the water body is greatly improved, and algae blooming is controlled.

Description

technical field [0001] The invention relates to a water treatment method, in particular to a method for transplanting and raising marine fish in near-shore estuaries to control algae content in natural eutrophic freshwater water bodies, which is suitable for inland reservoirs, mountain ponds, ponds, artificial wetland systems, etc. A method for preventing and controlling the occurrence of high-algae water in the eutrophic freshwater environment. 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 fishery production. [...

Claims

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Application Information

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Patent Type & Authority Applications(China)
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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