Feed additive for female large yellow croaker and its preparation method and application

Abstract

The invention discloses a large yellow croaker female feed additive, a preparation method and application thereof, and belongs to the technical field of large yellow croaker feed. In terms of parts by weight, every 100 parts of the feed additive includes 10-20 parts of Chinese herbal medicine preparation and 0.5-2.5 parts of resveratrol, and the rest is carrier; the raw materials of the Chinese herbal medicine preparation include rhubarb, coptis and licorice. The feed additive can not only effectively reduce the gonad index of large yellow croaker females, but also effectively inhibit the gonad development of large yellow croaker females by combining rhubarb, coptis, licorice and resveratrol in the breeding of large yellow croaker females. Moreover, the weight gain rate and survival rate of female large yellow croaker can be improved, and the breeding benefits can be greatly improved. The preparation method of the above-mentioned feed additive is simple and rapid, and can be industrialized.

Description

technical field [0001] The invention relates to the technical field of large yellow croaker feed, in particular to a feed additive for large yellow croaker female fish and its preparation method and application. Background technique [0002] Large yellow croaker is one of the most important economic fish in the southeast coast of my country, and it is also the marine fish with the highest aquaculture output in my country. It is widely favored by consumers in domestic and foreign markets. At present, almost all female large yellow croakers in the market are cultured artificially. Since the cost and risk of common cage culture are relatively low, the most common mode of culture in offshore cages is the common cage culture. [0003] However, the common cage culture mode will cause the gonads of large yellow croaker females to develop too fast. Farms (households) have found that some female fish have abdomen swelling when they weigh about 200g. In the process of gonad developme...

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Problems solved by technology

[0003] However, the common cage culture mode will lead to the rapid development of the gonads of large yellow croaker females. Farms (households) have found that some female fish can see abdominal swelling when they weigh about 200g.

In the process of gonad development in fish, the energy produced by fish body metabolism is mainly consumed in the growth of sex cells, and the protein and fat content in muscle and liver starts to grow rapidly from sex cells to continue to decrease until sex cells are discharged, seriously Affects its normal growth, leading to a decline in production; in addition, female fish that mature before the reproductive season will die due to conditions that cannot spawn, which will increase the mortality of farmed fish and bring huge economic losses to the breeding of large yellow croaker females

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