Prawn culture system biological floccule concentration control method based on compensatory growth

Abstract

The invention discloses a prawn culture system biological floccule concentration control method based on compensatory growth. The prawn culture system biological floccule concentration control method based on compensatory growth comprises the following steps that (1), a carbon source is added into a prawn culture water body, and biological floccules of a prawn culture system is cultured; (2), after the content of the biological floccules in the culture water body reaches a certain degree, compensatory growth treatment is carried out; and (3), firstly, starvation treatment is carried out on prawns for 1-3 days, and then returning to normal feeding for 3-9 days is carried out, so that the content of biological floccules is maintained at the level of 10-15 mg / L. According to the prawn culture system biological floccule concentration control method based on compensatory growth, the forming speed and the deposition rate of the biological floccules are controlled by utilizing the compensatory growth effect of the prawns, and therefore the relative stability of the biological floccules is maintained.

Description

technical field [0001] The invention relates to a method for controlling the concentration of biological flocs, in particular to a method for controlling the concentration of biological flocs in a prawn cultivation system, and in particular to a method for controlling the concentration of biological flocs in a shrimp cultivation system based on compensation growth. Background technique [0002] As an in-situ water quality control technology, biofloc technology increases the carbon-to-nitrogen ratio (C / N) of the water body by adding carbon sources to the aquaculture water body, promoting the proliferation of heterotrophic microorganisms in the water body, and reducing the ammonia nitrogen and nitrous acid in the water body. Metabolites such as nitrogen are converted into nutrients that can be directly ingested by aquatic farmed animals. The adoption of biofloc technology in shrimp farming can not only reduce the ammonia nitrogen and nitrite nitrogen levels in the breeding wat...

AI Technical Summary

Problems solved by technology

Aging flocs will deposit a large amount at the bottom of the pond, causing deterioration of water quality and reduction of dissolved oxygen. Excessive flocs will also block the gills of prawns and cause anoxic death, etc., which will adversely affect the growth of prawns

Therefore, it is necessary to control and maintain the biofloc. At present, the concentration of the floc is often adjusted by removing the aged and redundant biofloc in the aquaculture water. The most commonly used method is the water change method. This method not only wastes a lot of water resources , and it is easy to cause large fluctuations in aquaculture water quality, which is not conducive to the stability of the shrimp aquaculture environment

There are also biofilm adsorption methods, natural precipitation methods, etc. to remove bioflocs. These methods have disadvantages such as low removal efficiency and high energy consumption.

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