Method for culturing biofloc and method for applying biofloc to aquaculture

Abstract

The invention discloses a method for culturing biofloc and a method for applying the biofloc to aquaculture, and belongs to the technical field of aquaculture. Straw is crushed, and evenly mixed with corn starch and water, the mixture is cut up to solid particles of 0.45 mm to 0.55 mm after being puffed, and the solid particles and aquaculture water are mixed according to the volume ratio of (1-1.2):1; bacillus is added to the aquaculture water, so that the viable count is (2-5)*1,010 cfu / L; suspended solids in a culturing unit are collected, and the biofloc is obtained; when aquaculture is carried out, 0.3-0.5 kg of biofloc is added to each stere of culture pond water, the biofloc is sprayed into the aquaculture water, and the volume ratio of the biofloc to water in a culture pond is kept to range from 10% to 15% in the culture period. A carbon source is obtained through biochemical treatment on the straw, the culturing cost of the biofloc is reduced, the biofloc is promoted to fast grow, and the biofloc with the grain size of 500 micrometers to 1,000 micrometers is obtained. The quality of the aquaculture water is adjusted, and the utilization rate of bait is increased.

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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