Compound immunopotentiator for post larvae of litopenaeus vannamei

Abstract

The invention relates to a compound immunopotentiator for post larvae of litopenaeus vannamei, which comprises the following components in percentage by weight: 20-30 percent of beta-glucan, 20-30 percent of chitosan, 5-10 percent of ginsenoside, 10-20 percent of astragalus polysaccharides, 5-10 percent of phospholipid, 40-60 percent of vitamin C-2-polyphosphate ester, 10-15 percent of vitamin E, 5-10 percent of vitamin A, 10-20 percent of bacillus subtilis and 1-5 percent of clamworm powder. The invention has the following advantages that: (1) the problem of feedback inhibition of the post larvae of litopenaeus vannamei is overcome effectively; (2) the immunity of the post larvae of litopenaeus vannamei is enhanced obviously, and the survival rate is increased; (3) the activity and the growth speed of the post larvae of litopenaeus vannamei are increased obviously; (4) the compound immunopotentiator has the addition amount of only 0.2-0.3% when used as a feed additive for a particle feed of the post larvae of litopenaeus vannamei; (5) no adverse effect on the palatability of the feed exists; and (6) the source of the raw materials is stable, the cost is low, and the production process is simple.

Description

technical field [0001] The invention relates to a feed additive, in particular to a compound immune enhancer for Litopenaeus vannamei juveniles. Background technique [0002] Litopenaeus vannamei is the species with the largest area and the highest yield in my country's shrimp farming, and it is also the shrimp product with the largest export volume in my country. In order to improve the survival rate, large doses of antibacterial drugs are often used in seedling breeding; at the same time, high temperature seedling raising is also generally used to speed up the metamorphosis of larvae to shorten the seedling time and reduce the cost of seedling raising. However, farmers generally believe that "high-temperature seedlings" and shrimp seedlings treated with large doses of antibiotics grow relatively slowly in the growth stage, have weak disease resistance, and are prone to diseases. Due to problems such as drug residues and bacterial drug resistance, international calls for r...

AI Technical Summary

Problems solved by technology

Due to problems such as drug residues and bacterial drug resistance, international calls for restricting the use of antibiotics are getting higher and higher. If during the breeding period, immune enhancers are added to the feed of larvae to improve their body's disease resistance, it can reduce the Even to eliminate the use of antibiotics in the breeding process, the effect of a single-component immune enhancer is limited, and long-term use is prone to the problem of feedback inhibition

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