Compound feed for improving redness of crab shells and crab cream of cooked river crabs and preparation method of compound feed

By combining compound pigments and soybean lecithin oil, the problems of underdeveloped crab roe and dull shell color in river crabs have been solved, resulting in plump and bright red crab roe and enhancing the market value of river crabs.

CN122096346APending Publication Date: 2026-05-29FUYANG NORMAL UNIVERSITY
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Patent Information

Application Number
CN202610389939.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-03-27
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

Existing feeds for crab farming have problems such as underdeveloped crab roe, dull crab shell color, and resource waste. In particular, the absorption rate of carotenoids is low and they fail to effectively promote gonadal development.

Method used

A compound pigment scheme was adopted, which included a specific ratio of capsanthin, zeaxanthin and natural astaxanthin. Soybean lecithin oil was used as a bioavailability promoter for carotenoids, and bile acids were combined to improve the gonadal development and pigment absorption rate of crabs. The feed was prepared using a specific spraying temperature and drying process.

Benefits of technology

It significantly improves the plumpness of crab roe and the redness of crab shell, increases the weight of crab roe by 10-15%, greatly enhances the redness of crab shell and crab roe, improves nutrient utilization, and strengthens the premium value of river crabs in the market.

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Abstract

The invention is suitable for the technical field of feeds, and provides a compound feed for improving the redness of crab shells and crab cream of cooked river crabs and a preparation method thereof. Comprising the following raw materials in percentage by weight: 25%-32% of fish meal, 8%-12% of defatted soybeans, 3%-5% of blood powder, 3%-5% of cottonseed meal, 0.8%-1.6% of cottonseed meal enzymolysis protein, 16%-20% of peanut meal, 1.5%-2.5% of rapeseed meal, 18%-22% of alpha-starch, 2.5%-4.0% of soybean phospholipid oil, 1%-2% of fish oil, 1.2%-1.5% of monocalcium phosphate, 0.6%-1.0% of zeolite powder, 1% of a compound premix, 0.5%-1.0% of capsorubin, 0.3%-0.5% of zeaxanthine, 0.1%-0.2% of natural astaxanthin, 0.5% of bile acid and 0.5% of ethoxyquin. The bioavailability of carotenoid is improved by utilizing the strong emulsifying property of phospholipid, and the redness of hepatopancreas and crab shells is enhanced; phospholipid components rich in the soybean phospholipid oil are used for promoting gonad development of the river crabs, the volume of the crab cream (hepatopancreas and gonads) is increased, and the overall visual redness of the crab cream is further enhanced through pigment accumulation in the gonad development process.
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