Functional feed for improving quality of ctenopharyngodon idellus by using schizochytrium sp. residues

Abstract

The invention provides a preparation method of a functional feed for improving the quality of ctenopharyngodon idellus by using schizochytrium sp. residues. The preparation method comprises the following steps: S1, uniformly mixing Ca (H2PO4) 2, bentonite and a premix; S2, firstly adding soybean meal into a small material, carrying out uniform mixing, then adding molten lard, performing uniform rubbing, then sequentially adding linseed oil and soybean oil, and carrying out sufficient and uniform rubbing so as to obtain an oil-rubbed small material; S3, sequentially adding fish meal, cottonseed meal, rice bran, flour and schizochytrium sp. residues, and performing uniform mixing to obtain a large material; S4, adding water for granulation; S5, conducting feeding in batches, and conducting discharging uniformly; and S6, spreading and airing granulated feed in the S5 until the feed is dry. The feed increases the DHA content of schizochytrium sp. muscles remarkably, reduces the specific gravity of fat in the abdominal cavity of the schizochytrium sp. and inedible viscera such as liver, improves the oxidation resistance of fish and solves the problems that the DHA content in the fish is low, the fat in the abdominal cavity is seriously accumulated, the health condition is poor and the like when the fish is fed with a common commercial material.

Description

technical field [0001] The invention relates to the field of fish feed, and relates to the use of special raw materials and the preparation of special feed, and in particular to a functional feed for improving the quality of grass carp by using schizopotter algae residue. Background technique [0002] Grass carp (Ctenopharyngodon idellus) belongs to Cyprinidae, Cyprinidae, and the genus Grass Carp. It is the freshwater aquaculture species with the highest output in my country. In 2019, the output reached 5,533,083 tons, accounting for 21.72% of the national freshwater fish aquaculture output (China Fishery Statistical Yearbook, 2020) . Grass carp has high economic value because of its delicious meat, rich nutrition and high yield. [0003] With the development of intensive farming, grass carp breeding generally adopts the intensive farming mode of feeding compound feed and reducing or not feeding green feed. Although this mode significantly improves the growth rate of grass...

AI Technical Summary

Problems solved by technology

[0005] Technical problem to be solved: the object of the present invention is to provide a preparation method and application of grass carp special feed added with schizochytrium algae residue, so as to solve the problem of low n-3LC-PUFA content in grass carp muscle and serious fat accumulation in the body at this stage , muscle mass and poor health

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