Feed additive for reducing emission of nitrogen and phosphorous of litopenaeus vannamei aquatic water

Abstract

The invention discloses a feed additive for reducing the emission of nitrogen and phosphorous of litopenaeus vannamei aquatic water. The feed additive consists of the following components in percentage by weight: 30 to 40 percent of pangasinan extract, 10 to 20 percent of beta-glucan, 10 to 20 percent of algal polysaccharides, 20 to 30 percent of vitamin C-2-polyphosphate and 10 to 15 percent of vitamin E. The feed additive has the advantages that: (1) the content of nitrogen, phosphorus, nitrate and nitrite of the litopenaeus vannamei aquatic water can be obviously reduced, and environment is protected; (2) the growth speed of litopenaeus vannamei can be obviously improved, the survival rate is improved, the quality of aquatic products is improved and the feed cost is reduced; (3) when the feed additive is used in a feed for litopenaeus vannamei, the adding amount of the feed additive is only 0.1 to 0.2 percent; (4) the feed additive does not have any adverse effect on the palatability of the feed; and (5) the raw materials are stable in sources and low in prices, and a production process is simple.

Description

technical field [0001] The invention relates to a feed additive, in particular to a feed additive for reducing the discharge of nitrogen and phosphorus in the culture water of Litopenaeus vannamei. Background technique [0002] Litopenaeus vannamei, also known as Penaeus vannamei, was originally distributed in the waters along the Pacific coast of Central and South America, and the distribution along the coast of Ecuador is the most concentrated. Litopenaeus vannamei has a long reproductive cycle, strong resistance to changes in water environment factors, long out-of-water survival time, fast growth, strong adaptability, strong disease resistance, low nutritional requirements for feed, thin shrimp shell, containing It has the advantages of large amount of meat and miscellaneous food habits. Since the promotion of farming in South my country in 1998, it has become the primary shrimp farming species in my country's coastal areas. [0003] However, with the rapid development ...

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Problems solved by technology

[0003] However, with the rapid development of high-density artificial aquaculture and the increasing pollution of the aquaculture environment, the pollution degree of the shrimp aquaculture water far exceeds the purification ability of the water body itself, resulting in ammonia nitrogen, nitrite nitrogen, phosphate, The increase in the content of pollutants such as sulfide and organic matter, the serious eutrophication of the water body, and the destruction of the normal micro-environmental ecosystem of the water body will eventually affect the reduction in the production and quality of prawns

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