A kind of floating feed for snakehead larvae and preparation method thereof
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A feed and seed technology, which is applied in the field of floating feed and its preparation for juvenile snakehead fish, can solve problems such as differences in the effect of surfactants, achieve the effects of less nutritional antagonistic factors, promote uniform dispersion, and improve the survival rate of snakehead seedlings
Active Publication Date: 2022-03-15
SUN YAT SEN UNIV
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Problems solved by technology
However, the effects of different surfactants are significantly different, especially for juvenile fish, which have higher requirements for feed
Method used
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Embodiment 1
[0048] The preparation of embodiment 1 spraying agent
[0049] Mix 85% fish oil, 3% lipopeptide biosurfactant, 2% vitamin E and the rest of distilled water; stir for 5-15 minutes to obtain the spraying agent.
[0050] Wherein, the lipopeptide biosurfactant is obtained by fermenting and purifying the modified Bacillus thuringiensis, and its chemical structural formula is:
[0051]
[0052] Among them, Phe, Pro, Thr, Ala and Tyr represent phenylalanine, proline, threonine, alanine and tyrosine, respectively.
[0053] Wherein, the transformation method of Bacillus thuringiensis is as follows: by ultraviolet mutagenesis, plasma mutagenesis, ethyl methanesulfonate (EMS) mutagenesis and compound mutagenesis methods thereof, Bacillus thuringiensis (Bacillus thuringiensis) is carried out mutagenesis, Taking the yield of lipopeptide surfactant as the screening index, the mutant strain with high yield was screened. The yield of lipopeptide surfactants of Bacillus thuringiensis (0.3...
Embodiment 2
[0060] The preparation of embodiment 2 spraying agent
[0061] Mix 87% fish oil, 2.5% lipopeptide biosurfactant, 1.6% vitamin E and the rest of distilled water; stir for 5-15 minutes to obtain the spraying agent.
Embodiment 3
[0062] The preparation of embodiment 3 spraying agent
[0063] Mix 89% fish oil, 1.5% lipopeptide biosurfactant, 0.8% vitamin E and the rest of distilled water; stir for 5-15 minutes to obtain the spraying agent.
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Abstract
The invention discloses a floating feed for juvenile snakehead fish and a preparation method thereof. The present invention firstly develops a spraying agent prepared from 85-90% fish oil by mass percentage, 1-3% lipopeptide biosurfactant, 0.6-2.0% vitamin E and the balance of distilled water. Based on the spraying agent, a floating feed for juvenile snakehead fish with the function of helping oil absorption has been developed. Specifically, the following mass fraction of raw materials is used to make granules, and then the spraying agent is sprayed on the surface of the granules to obtain: 28-40% fish meal , 20-25% high-gluten flour, 10-15% bean curd, 8-12% bran, 4-6% shrimp powder, 2-6% squid paste, 2-4% spirulina and 0.2-0.4% oxidized gallbladder alkali. The feed has high nutrient retention, less nutritional antagonistic factors, good palatability, good buoyancy, and low cost, and has beneficial effects such as significantly helping snakehead seedlings absorb oil efficiently and significantly improving the survival rate of snakehead seedlings.
Description
technical field [0001] The invention belongs to the technical field of feed. More specifically, it relates to a floating feed for juvenile snakehead fish and a preparation method thereof. Background technique [0002] The snakehead (Ophiocephalus argus) is widely distributed in my country, except for the western plateau of China, it is widely distributed in the vast areas from the Yangtze River Basin to the Heilongjiang River Basin. The black snakehead not only has fewer bone spurs, tender meat, high meat content, delicious taste, and rich nutrition, but also has the functions of removing blood stasis, promoting regeneration, nourishing and recuperating, promoting muscle and blood, and promoting wound healing. Therefore, as early as more than 2,000 years ago, it was listed as the top grade of insect fish by "Shen Nong's Materia Medica", and it is a rare freshwater fish. [0003] Most of the traditional supply of snakeheads on the table comes from wild fishing or breeding w...
Claims
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