Crab feed added with marine red yeast extract

Abstract

The invention discloses a crab feed added with a marine red yeast extract. The crab feed comprises the following nutritional components in percentage by weight: 38-65% of protein source raw materials,3-11% of fat source raw materials, 20-35% of sugar source raw materials, 2% -6% of the marine red yeast extract, 1% -3% of fermented aloes, 0.4% -1.5% of compound vitamins and 1-1.5% of composite mineral salt. A preparation method of the marine red yeast extract comprises the following steps: taking marine red yeast dry powder, adding distilled water, 2-phenoxy ethanol and citric acid, performingultrasonic wall breaking, adding papain for enzymolysis, centrifuging, and carrying out freeze drying on supernate to obtain the marine red yeast extract. The preparation of the fermented aloes comprises the following steps: pretreating the aloes, wherein the extraction rates of vitamin, aloin and aloe polysaccharides can be improved by 4-Methyl heptanol and phenyl salicylate; preparing a fermentation strain; and preparing the fermented aloes. The feed has the beneficial effects that the feed is high in nutritive value, promotes the growth of crabs, and has the effect of improving the immunity.

Description

technical field [0001] The invention relates to the technical field of aquatic feed, in particular to crab feed added with marine red yeast extract. Background technique [0002] Crab is a delicious and easily absorbed food, which is deeply loved by people. In recent years, the scale of crab farming has increased rapidly, bringing good economic benefits to farmers. In order to pursue high yield and high efficiency, many farmers adopt high-density farming, resulting in poor breeding environment, low immunity of crabs and easy occurrence of diseases, and feeding antibiotics not only cannot effectively prevent and control diseases, but also affect the quality of crab meat, which in turn damages the economic value of crabs, forming a vicious circle . [0003] Marine red yeast (Rhodotorula paludigenum) is a single-celled eukaryotic organism isolated from marine soil. The bacteria are rich in biologically active substances such as β-glucan, mannan oligosaccharides, active polype...

AI Technical Summary

Problems solved by technology

The advantages of this invention are: 1. The macromolecular protein in soybean meal is decomposed into small molecular peptides, which improves the digestion and absorption rate of protein, and further balances the composition of amino acids through microbial conversion; Physiologically active substances such as astaxanthin introduced by yeast metabolism improve the nutritional value of the feed; 3. The lactic acid bacteria in the fermented feed have a positive effect on improving the micro-ecological flora of the intestinal tract of farmed animals; 4. The fermentation cost is low and the fermentation conditions It has low requirements on equipment and equipment, simple process operation, small investment, and is suitable for small-scale production of farmers and feed processing factories; however, the invention feed needs to be improved in improving animal immunity

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