Method for cultivating biofloc and method for using biofloc in aquaculture

Abstract

The invention discloses a method for cultivating biological flocculation in the technical field of aquaculture and a method for using biological flocculation in aquaculture. The straw is pulverized and mixed with cornstarch and water evenly, and the mixture is expanded and processed. Then chop it into solid particles of 0.45~0.55mm, mix the solid particles with the aquaculture water at a volume ratio of (1~1.2):1, and then add Bacillus to the aquaculture water so that the number of viable bacteria is (2~5) ×1010cfu / L, collect the suspended solids in the culture unit to obtain bio-floc; when carrying out aquaculture, add 0.3-0.5 kg of bio-floc per cubic meter of water in the aquaculture pond, splash the bio-floc into the aquaculture water, During this period, the volume ratio of the biofloc to the water body of the culture pond was maintained at 10% to 15%. The present invention obtains carbon source by biochemically treating straw, reduces the cost of cultivating biological flocs, promotes the formation of biological flocs more quickly, and obtains biological flocs with a particle size of 500-1000 microns; adjusts the water quality of aquaculture water, and improves the utilization rate of bait .

Description

technical field [0001] The invention relates to a method for cultivating biological flocs and an application method in aquaculture, belonging to the technical field of aquaculture. Background technique [0002] my country is a big aquaculture country. In the current aquaculture activities, farmed fish can only digest and absorb 20%-25% of the protein in the bait, and the rest exists in the aquaculture water environment in the form of ammonia nitrogen, residual bait and feces. The discharge of aquaculture sewage during the breeding process has caused serious pollution to the water environment. Biofloc technology is currently the leading aquaculture water control technology at home and abroad. There are two main ecological functions of biofloc in aquaculture ponds: one is that heterotrophic bacteria in biofloc convert inorganic nitrogen in aquaculture water into bacteria Its own components (bacterial protein) can achieve the effect of reducing harmful substances such as ammoni...

AI Technical Summary

Problems solved by technology

Its disadvantages are: firstly, the cost of such soluble carbon sources is relatively high, which increases the cost of cultivation and reduces the economic benefits of cultivation, and there are limitations in the extraction of materials for such carbon sources, such as sugarcane molasses being limited to sugarcane production. Second, the microorganisms in the water only rely on their own flocculation and lack of attachment carriers, so it takes a long time (more than two weeks) to generate bioflocs, which increases the time cost; third, the bioflocs obtained by cultivation The size is different, and the size is limited to 100-200 microns. It cannot be ingested by larger economical species, and the bait utilization effect is not good.

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