Special compound feed for flounder juvenile fish and processing method

Abstract

The invention relates to a special compound feed for flounder juvenile fish and a processing method, and belongs to the technical field of processing of aquaculture feeds. The special compound feed comprises the following raw materials of 25 to 35 parts of fish meal, 30 to 55 parts of enzymolysis plant protein, 2 to 9 parts of alpha-starch, 6 to 9 parts of fish oil, 0.8 to 1.2 parts of soybean lecithin, 0.4 to 0.7 part of lysine, 0.2 to 0.4 part of methionine, 0.4 to 0.8 part of dimethylpropiothetin, 0.8 to 1.2 parts of complex vitamins, 1.5 to 2.5 parts of complex minerals, 0.02 to 0.06 part of anti-oxidant, and 0.4 to 0.6 part of choline chloride. The method comprises the following processing steps of (1) preparing of an enzymolysis solution; (2) enzymolysis of plant protein; (3) preparing materials; (4) crushing; (5) secondary mixing; (6) preparing; (7) extruding of an expander to granulate; (8) drying; (9) spraying of grease; and (10) cooling by a cooler. The specific compound feed has the advantages that the formulation is scientific, the process is reasonable, the ratio of the plant protein in the compound feed is increased, the nutrients required for growth of juvenile fish can be met, the particular growth rate of the juvenile fish is higher in comparison with full-fish meal feed in feeding, the coefficient of the feed is lower, and the stability in water is high.

Description

technical field [0001] The invention relates to a special compound feed for juvenile flounder fish and a processing method thereof. Specifically, the special compound feed for juvenile flounder fish is produced by using a plant protein enzymatic hydrolyzate instead of part of the fish meal, and belongs to the technical field of aquaculture feed processing. Background technique [0002] Fish meal is often used as the main raw material of animal compound feed on a large scale because of the balance of amino acids contained in it, its easy digestion, and the formation of bioactive peptides after digestion. In recent years, with the expansion of the scale of aquaculture in my country, the demand for fishmeal has increased sharply, and the price has also continued to rise, resulting in an increase in feed costs. In the aquaculture industry, people have been looking for other protein sources to replace fishmeal. Plant protein is the best choice to replace fishmeal because of its w...

AI Technical Summary

Problems solved by technology

Plant protein is the best choice to replace fishmeal because of its wide source, large output and low phosphorus content. However, the disadvantages of plant protein, such as anti-nutritional factors and amino acid imbalance, greatly limit its use in seawater carnivorous fish feed. use

Seawater fish, especially the juveniles of seawater fish, are mostly carnivorous and have high protein quality requirements. If a large proportion of plant protein is used to replace fish meal, it will lead to slow growth of fish, decreased immunity, intestinal inflammation, etc. Phenomena, some manufacturers use the method of adding compound enzymes to the feed to improve protein utilization and reduce feeding costs, but directly adding compound enzymes to the feed, the compound enzymes will be inactivated during the high-temperature pelleting process, and seawater The temperature of fish intestines is low, and enzymes cannot exert their maximum activity, which not only increases the cost but also does not play any role. These series of problems are the bottleneck restricting the development of aquatic animal feed