Research Article 
Yeast and Trichoderma viride Don't Synergistically Work to Improve Olive Trees by Products Digestibility and Lactating Barki Ewe's Productivity
Hossam H. Azzaz, Hend A. Aziz, Hoda Alzahar and H.A. Murad
Journal of Biological Sciences, 2018, 18(6), 270-279.
Abstract
Background and Objective: Olive trees by products (OTB) as agro-waste not efficiently used and left it without treatment may cause serious economical, social and environmental problems. Biological treatments for such wastes can upgrade their nutritive values to be used as alternative feeds for ruminants. Investigate if their synergism between T. viride and S. cerevisiae and impact of each of them or their mixture on OTB digestibility and lactating Barki ewe's productivity are the main objectives of this study. Materials and Methods: Early lactating Barki ewes were randomly assigned into four groups of seven animals each using complete random design. Ewes were fed (4% of their body weight DM), 70% concentrate feed mixture (CFM)+30% untreated OTB (control group), 70% CFM+30% OTB treated with Trichoderma viride (R1), 70% CFM+30% OTB treated with Saccharomyces cerevisiae (R2) and 70% CFM+30% OTB treated with T. viride+S. cerevisiae (R3). Results: No synergism was noted between T. viride and S. cerevisiae on the tested parameters. Ruminal total volatile fatty acids and NH3-N concentrations, microbial protein synthesis and total protozoa count were higher in treated groups than control. Biological treatments increased (p<0.05) all nutrients digestibility, fiber fractions digestibility, milk production and milk components yields. Blood serum globulin, urea, ALT and AST concentrations were not change among all ewes groups, while biologically treated ewes had higher (p<0.05) serum total protein and albumin than those of control. Conclusion: Inclusion of biologically treated olive tree by products (OTB) in lactating ewe’s rations improved their productive performance with no deleterious effects on the treated animal’s health.
ASCI-ID: 38-2468