Method for controlling eutrophic water algae

Abstract

The invention relates to a method for controlling eutrophic water algae. The method includes the following steps that silver carps or / and bighead carps are thrown according to the total water amount of eutrophic water and the content of chlorophyll a; basses are thrown 60-80 days after the silver carps or / and the bighead carps are thrown, the proportion of the silver carps or / and the bighead carps to the basses is (470-498): (30-2). On the basis of the characteristics of filter-feeding fishes, in particular to the characteristic that the fishes regard algae as food, due to research on the total water amount of eutrophic water, the quantity of algae and the conditions of chlorophyll a and the fishes (which mainly refer to the filter-feeding fishes), fishes are thrown according to different feeding habits of the fishes, the algae in eutrophic water are reduced, the eutrophication problem of water is solved, no large quantity of manpower or material resources are needed, and labor intensity and economic cost are reduced; no additives need to be added, secondary pollution to water is not caused, the eutrophication problem of water is solved, and meanwhile certain economic benefits can be increased.

Description

technical field [0001] The invention relates to the technical field of water body ecological restoration methods, in particular to a method for controlling algae in eutrophic water bodies. Background technique [0002] Eutrophication of water body is a kind of water quality pollution caused by excessive content of plant nutrients such as nitrogen and phosphorus. After water eutrophication, aquatic plants, especially algae, will multiply in large numbers, which will change the number of species of biomass and destroy the Ecological balance of water bodies. The relevant technologies for controlling the eutrophication of water bodies mainly include methods such as artificial algae removal, use of algae-eating insects, and chemical algae removal; but the inventors have found that artificial algae removal, use of algae-eating insects, and chemical algae removal methods require a lot of manpower and material resources The cost of algae control is high due to the large amount of e...

AI Technical Summary

Problems solved by technology

The relevant technologies for controlling the eutrophication of water bodies mainly include methods such as artificial algae removal, use of algae-eating insects, and chemical algae removal; but the inventors have found that artificial algae removal, use of algae-eating insects, and chemical algae removal methods require a lot of manpower and material resources The cost of algae control is high due to the large amount of engineering work; the method of coagulation and sedimentation and chemical algae killing is used to remove algae by using iron, aluminum or calcium and phosphate to form insoluble precipitates that can settle, and can be obtained in a short period of time. It has a certain effect, but there are problems of incomplete treatment, high cost, and secondary pollution, which cannot solve the problem of algae in eutrophic water well