Floating feed for juvenile ophiocephalus argus stage and preparation method of floating feed
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A feed and raw material technology, which is applied in the field of floating feed and its preparation for juvenile snakehead fish, can solve problems such as the difference in the effect of surfactants, achieve a high degree of retention, improve palatability, and promote the effects of oil absorption
Active Publication Date: 2019-11-26
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 floating feed for a juvenile ophiocephalus argus stage and a preparation method of the floating feed. Firstly, a spray agent prepared from 85%-90% by mass of fish oil, 1%-3% bymass of a lipopeptide biosurfactant, 0.6%-2.0% by mass of vitamin E and the balance distilled water is researched and developed. On the basis of the spray agent, the floating feed used for the juvenile ophiocephalus argus stage and having an oil absorption assisting function is researched and developed. Specifically, the floating feed is prepared by steps of preparing particles from raw materialsand spraying the spray agent to the surfaces of the particles, and the raw materials comprise 28%-40% by mass of fish meal, 20%-25% by mass of high-gluten flour, 10%-15% by mass of soybean meal, 8%-12% by mass of bran, 4%-6% by mass of shrimp meal, 2%-6% by mass of squid visceral ointment, 2%-4% by mass of spirulina and 0.2%-0.4% by mass of choline oxide. The feed is high in nutrient retention degree, good in palatability, good in buoyancy and low in cost, contains few nutritional antagonism factors and has the beneficial effects of remarkably assisting in efficient oil absorption of juvenileophiocephalus argus, remarkably increasing the survival rate of the juvenile ophiocephalus argus and the like.
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...
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