Culture method for effectively reducing heavy metal cadmium content in cultured fish bodies

Abstract

The invention discloses a culture method for effectively reducing the heavy metal cadmium content in cultured fish bodies. A mixed culture method oriented to fish and pearl mussel culture is adopted, and 70-100 kg of quick lime is applied for each mu of water surface before putting; in the culture process, the quick lime is applied for one time every two weeks, and the application amount each time is appropriately adjusted according to the season and weather conditions. By the adoption of the culture method, the content of cadmium ions entering cultured fish bodies or other aquatic organism bodies can be effectively reduced; the pH of a culture water body is regulated through the quick lime, and the toxic effect of the heavy metal cadmium on the cultured fishes is reduced; a sufficient calcium source ensures healthy development of bones and other components of the fishes and other aquatic organisms; the stronger heavy metal enrichment capabilities of hyriopsis cumingii and other low-value mussels are fully utilized, and the amount of the heavy metal cadmium enriched in the fish bodies can be decreased. The culture method has the advantages of being simple, simple and convenient to operate, wide in raw material source, low in cost, obvious in effect and convenient to popularize and apply during production.

Description

Technical field [0001] The invention relates to a fish breeding method in a water body polluted by cadmium, in particular to a breeding method for effectively reducing the heavy metal cadmium content in the cultivated fish. Background technique [0002] my country is the largest aquaculture country in the world. The output of aquatic products accounts for about 70% of the world's total output, and the output of freshwater fish accounts for 73% of the total output of the world's freshwater fish farming. The rapid development of the aquaculture industry has greatly alleviated the long-term dependence on natural fishery resources, successfully solved the problem of "difficulty in eating fish" of my country's 1.3 billion people, and played a huge role in improving the dietary structure of residents. [0003] However, my country’s long-term mining and processing of minerals, as well as the accumulation of heavy metal pollution in the process of agriculture and industrialization have gra...

AI Technical Summary

Problems solved by technology

The current bioremediation method for heavy metal treatment is mainly based on phytoremediation. This method lasts for a long time, is slow to take effect, and is prone to secondary pollution, and the recycling technology needs further research and exploration

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