Feed additive and application thereof in largemouth bass feed

Abstract

The invention provides a feed additive and application thereof in largemouth bass feed, and the feed additive comprises the following components in parts by weight: 40-90 parts of hydrolyzed tannic acid, 2-6 parts of gallic acid, 0.2-2 parts of silicon dioxide and 5-50 parts of tannin. The tannin is added into the feed additive, so that the dosage of the hydrolyzed tannic acid can be reduced, and the feed additive is used for the largemouth bass feed, so that the liver glycogen content and the serum triglyceride level of the largemouth bass can be remarkably reduced, the survival rate and the antioxidant level can be improved, and the intestinal health level can also be improved.

Description

technical field [0001] The invention relates to a gallnut extract, in particular to a feed additive containing gallnut extract and its application in largemouth bass feed. Background technique [0002] Largemouth bass, also known as California sea bass, is a famous carnivorous fish with delicious meat, strong disease resistance, rapid growth, easy to catch, and wide temperature adaptability. In recent years, the technology of feeding compound feeds throughout the whole breeding process of largemouth bass has been developed, which has rapidly expanded the scale of its breeding. According to the China Freshwater Bass Industry Development Report (2021), the output in 2019 is about 400,000 tons, and the scale of farming in the past two years is still expanding, and the farming output is bound to increase, showing a situation of booming supply and demand. However, in the actual breeding process, multiple metabolic disorders occur, manifested as lighter and yellow liver color, ex...

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Problems solved by technology

However, studies on aquatic animals have found that adding 0.75% mass percentage of hydrolyzed tannin in the feed can promote the growth of puffer puffer obscurus, and have no significant effect on feed utilization (Yao Jingting, Kong Chun, Hua Xueming, et al. Hydrolyzed tannin Effects on feeding preference, digestion metabolism and antioxidant capacity of Puffer puffer obscura[J].Acta Fisheries, 2019(6):1449-1462.), Adding 0.1% by mass of hydrolyzed tannins can significantly change the microbes in the intestinal tract of prawns Composition, increase the growth rate of Penaeus vannamei, and affect the growth performance of Litopenaeus vannamei (Guo Hui, Zhu Xufeng, Chen Jinlin, et al. Effects of hydrolyzed tannins on the growth performance and intestinal microorganisms of Litopenaeus vannamei[J]. Chinese Fisheries Science, 2019 (5):883-892.), a large amount of use (mass percentage greater than 1%) has a significant negative effect on the growth of fish

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