Method for governing eutrophication of fresh water net cage fish-farming area

Abstract

The invention relates to the field of aquaculture and environment governing, in particular to a method for governing eutrophication of a fresh water net cage fish-farming area. The method includes the following steps of firstly, throwing water sinking aquatic plants in a peripheral net cage area with the initial throwing density smaller than or equal to 1.8 kg / m<2>, and throwing floating aquatic plants into the fish-farming net cage area with the initial throwing density smaller than or equal to 2.1 kg / m<2>; secondly, conduct harvesting when the density of the water sinking aquatic plants is larger than 4.8 kg / m<2> so that the density of the harvested water sinking aquatic plants can be smaller than or equal to 1.8 kg / m<2>, and conducting harvesting when the density of the floating aquatic plants is larger than 5.3 kg / m<2> so that the density of the harvested floating aquatic plants can be smaller than or equal to 2.1 kg / m<2>. The cultivation of the floating plants and the water sinking plants is combined with the net cage fish farming, the problem of the eutrophication of the fresh water net cage fish-framing area is quite obviously solved, and the method has the outstanding ecological benefits, social benefits and economic benefits.

Description

technical field [0001] The invention relates to the field of aquaculture and environmental treatment, in particular to a method for controlling eutrophication in freshwater cage fish farming areas. Background technique [0002] Cage fish farming is an important method of intensive aquaculture in natural waters in my country, but a large amount of residual bait and fish excreta (feces, etc.) directly enter the aquaculture waters during the aquaculture process, resulting in eutrophication of the water body. The phenomenon of eutrophication of water body has become a prominent contradiction in the current cage fish farming model, which is directly related to the economic benefits of cage fish farming and the water quality of nearby waters. Therefore, how to effectively control the eutrophication of cage culture water and restore the water quality is an important direction for the research of cage ecological fishery. [0003] Aquatic plants can not only provide habitats for fis...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the defects of the prior art, provide a method that can effectively control the eutrophication of the water body caused in the process of fish culture in freshwater cages, and realize the uninterrupted repair of the water body in the fish culture area of ​​freshwater cages throughout the year , the treatment method of the present invention has not only solved the ecological environment problem, but also can produce considerable economic benefits

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