Water-change-free and high-density aquaculture method of litopenaeus vannamei

Abstract

The invention has the advantages that a biological flocculation body culture tank is arranged outside a litopenaeus vannamei culture pond, and a breeding area is separated from a flocculation body culture area, so that the influence of the culture of a biological flocculation body on the growth of litopenaeus vannamei is avoided, the controllability of the production process is improved, the expected aim is achieved by regulating and controlling the flocculation body culture area, and the adverse effects, caused by directly operating in the breeding area, on fish are prevented; therefore, the breeding process is safer, the management is more convenient, and the breeding effect is better. According to the invention, straw is used for providing an attachment base for the litopenaeus vannamei, and a carbon source is provided at the same time, so that the breeding density is obviously improved, and wastes are utilized; bagged rice bran is used for providing the carbon source for a biological flocculation process, so that other carbon sources do not need to be added in the whole breeding process; the method is convenient to manage, realizes waste utilization, and is safe and environmental-friendly.

Description

technical field [0001] The invention relates to an improvement of a high-density culture method for Litopenaeus vannamei without changing water. Background technique [0002] The protein requirement of aquatic animals is significantly higher than that of mammals. But only about 20-30% of the fed protein is converted into fish catch, most of which cannot be utilized and exist in the aquaculture water body. According to the characteristics of heterotrophic bacterial growth and metabolism requirements, the researchers proposed that the C:N in the aquaculture water body should be increased to more than 10 to promote the assimilation of ammonia nitrogen by heterotrophic bacteria in the aquaculture water body and form microbial flocs (Biofloc) to control the aquaculture water. Accumulation of ammonia nitrogen in water bodies. Studies have shown that the biological flocs formed under aquaculture conditions contain 25-55% crude protein and 4-7% crude fat, which can meet the nutrit...

AI Technical Summary

Problems solved by technology

In this way, on the one hand, a large amount of DO in the aquaculture water body will be consumed during feeding. In addition, glucose is quickly degraded, while the generation of dissolved inorganic nitrogen such as ammonia nitrogen is a slow process, so the carbon source is still insufficient until the next addition of glucose

Moreover, when adding organic matter such as glucose, if the supply of dissolved oxygen cannot keep up, under the conditions of anoxic and high organic matter, H 2 S

There is still a lack of continuous addition technology

Images