Proteases preparation and their utilization in pig fatttening
1997
Michalik, I. | Urminska, D. | Szabova, E. | Paska, I. (Agronomicka Fakulta, Nitra (Slovak Republic). Katedra Biochemie a Biotechnologie)
The maximum productions of proteases was achieve by Bacillus subtilis strains S-5 and S-8 and Bacillus licheniformis strains L-2 and L-3. Under conditions of submersed fermentation using a 151 bioreactor in the optimized nutrient medium the yield of enzyme preparation was about 0.4%. Strain Bacilus licheniformis L-3 produces an extracellular alkaline Ser-protease. The 0.1% addition of protease preparation Nitrazyme to the fodders COS I and COS II had a positive effect on the pigs' growth, shown by the daily weight gain increasing from 26.8 to 31.5% over control
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