Nonreactive fermented feed of mixed bacteria and preparation method thereof
A technology of fermented feed and compound bacteria, applied in biochemical equipment and methods, animal feed, animal feed, etc., can solve the problems affecting the feeding effect of fermented feed, achieve the ability of strong cellulase production and the effect of inhibiting proliferation
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Embodiment 1
[0028] Embodiment 1, the preparation of composite bacteria liquid
[0029] (1) Preparation of various bacterial strains in the composite bacteria:
[0030] 1) Preparation of Bacillus subtilis CGMCC No.4628 bacterial liquid:
[0031] Preparation of Bacillus subtilis seed solution: Inoculate the strains preserved on the slant of the test tube into a 250ml Erlenmeyer flask containing 100ml of MNB medium, and culture in a constant temperature shaker at 30°C for 16h at a shaker speed of 225rpm.
[0032] Preparation of Bacillus subtilis bacterial liquid: Inoculate the prepared Bacillus subtilis seed liquid into a 250mL Erlenmeyer flask containing 100mL medium according to the inoculum amount of 1%, cultivate it in a constant temperature shaker at 30°C for 16h, and the shaker speed is 225 rpm.
[0033] The MNB medium of the present invention is: glucose, 5.0g / L; peptone, 5.0g / L; beef extract, 3.0g / L; yeast extract powder, 1.0g / L; magnesium sulfate heptahydrate, 0.5g / L ; Manganese ...
Embodiment 2
[0042] Embodiment 2, the steps of using compound bacteria to prepare non-antibiotic fermented feed and fermentation process parameters
[0043] (1) Preparation of the dry matrix of compound bacteria without antibiotic fermented feed: the dry matrix used to prepare compound bacteria without antibiotic fermented feed of the present invention is the part that compound feed does not comprise the premix of 4%, that is: first The part other than the 4% premix in the compound feed is mixed according to the ratio to make dry feed for fermentation. The compound feed formula is as follows (see Table 1):
[0044] Table 1. Formula of fermented feed compound feed
[0045]
[0046] (2) Preparation of composite bacteria liquid: three kinds of bacteria are taken from Example 1, the concentration of Bacillus subtilis is 4.20log CFU / mL; the concentration of Lactobacillus acidophilus is 4.12log CFU / mL; the concentration of Saccharomyces cerevisiae is 4.23log CFU / mL, according to the volume ...
Embodiment 3
[0056] Embodiment 3, the influence of composite bacteria solid-state fermentation of the present invention on feed microbial composition
[0057] (1) Collection of fermented feed samples prepared in Example 2: Samples were collected on the 0th (before fermentation), 1, 2, 3, 5, and 7 days after the start of fermentation, and analyzed for microbial composition. Detection indicators include: the number of Lactobacillus acidophilus, Bacillus subtilis, Saccharomyces cerevisiae and Escherichia coli.
[0058] (2) Microbiological determination of fermented feed samples: Microbiological determination adopts the 10-fold dilution method. Take 1 g of the sample and dissolve it in 9 mL of sterile water, then make a series of 10-fold dilutions, and select a suitable dilution gradient for determination.
[0059] Bacillus subtilis should be counted on the compound nutrient agar medium, and cultivated at 30°C for 16h.
[0060] For the determination of Lactobacillus acidophilus, MRS agar medi...
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