Biofloc culture method and aquatic culture method

Abstract

The invention relates to a biofloc culture method and an aquatic culture method. The biofloc culture method comprises the following steps of adding an organic silicon source into a water body, wherein the adding amount of the organic carbon source meets the requirement that a C / N ratio in the water body is (15 to 17):1; adding bacillus licheniformis, bacillus laterosporus and lactobacillus casei into the water body, wherein the total adding amount of the bacillus licheniformis, the bacillus laterosporus and the lactobacillus casei is 0.8*10<5> to 1.2*10<5>cfu per 1ml of water body; aerating the water body, and maintaining dissolved oxygen in the water body to be 6mg / L or more. The biofloc culture method has the advantage that by adding probiotics into the water body, and adjusting the adding amount of the organic carbon source in the water body, the certain C / N ratio in the water body is maintained, mass propagation of the probiotics in the water body is effectively promoted, the formation of biofloc is accelerated, and the large-size biofloc is obtained.

Description

technical field [0001] The invention relates to the technical field of aquaculture, in particular to a method for cultivating biological flocs and an aquaculture method. Background technique [0002] my country is a major shrimp farming country in the world. In 2015, the output of Litopenaeus vannamei in China exceeded 800,000 tons, accounting for about 33% of the world's total output. At present, the scale of farming is gradually expanding. With people's blind pursuit of high yield, the stocking density continues to increase. The structure of Litopenaeus vannamei farming model is single, and the large amount of feed leads to the continuous deterioration of the breeding water environment and the large-scale outbreak of infectious diseases. , seriously restricting the further development of the shrimp farming industry. [0003] The shrimp biofloc culture technology was first proposed by Israeli breeding expert Avnimelec in 1999, and was successfully tested in Indonesia in 20...

AI Technical Summary

Problems solved by technology

However, since the current shrimp farming model mostly uses filtered or sterilized water for farming, most of the beneficial bacteria are also removed, resulting in a shortage of beneficial bacteria. , become the limiting factor for the proliferation of beneficial bacteria, so it is difficult to cultivate beneficial bacteria in conventional culture

The practical results also show that even if the beneficial bacteria are splashed in the water body, the detection rate of the corresponding bacteria is extremely low after a few days, indicating that the breeding environment is not suitable for the survival of beneficial bacteria

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