TY - JOUR ID - 202654 TI - Chemical Changes in Digestibility, Blood and Milk Composition of Barki Ewes Fed Olive Tree By-products Treated with Urea or Phanerochaete chrysosporium JO - Egyptian Journal of Chemistry JA - EJCHEM LA - en SN - 0449-2285 AU - Azzaz, Hossameldeen Hussein AU - Aziz, Hend AD - Dairy Sciences Department, Food Industries and Nutrition Division, National Research Centre AD - Animal Nutrition Department, Desert Research Center, Cairo, Egypt. Y1 - 2022 PY - 2022 VL - 65 IS - 5 SP - 271 EP - 278 KW - Key words: Chemical and biological treatments KW - urea KW - Phanerochaete chrysosporium KW - Olive tree by products and Lactating ewes DO - 10.21608/ejchem.2021.99132.4610 N2 - AbstractOlive tree by-products (OTB) were examined to be used as an alternative feed for ruminants after improving their chemical composition through urea and Phanerochaete chrysosporium treatments. Twenty eight lactating Barki ewes were randomly assigned to four groups ( seven animals each) using the complete random design. Ewes were fed 70% concentrate feed mixture (CFM) + 30% Berssem hay (R1), 70% CFM + 30% untreated OTB (R2), 70% CFM+30% OTB treated with urea (R3), and 70% CFM+30% OTB treated with Phanerochaete chrysosporium (R4).Chemical and biological treatments were so effective in fiber decomposition of OTB and improve its nutritive value. Ruminal total volatile fatty acids, NH3-N concentrations and microbial protein synthesis were higher in treated groups R3and R4 than R2 group. Urea treatment was superior over biological treatment (p < 0.05) for improvement of all nutrients digestibility, blood serum glucose, protein and albumin, milk yield and milk composition. Inclusion of chemically and biologically treated OTB in lactating ewes’s rations improved their productive performance with no deleterious effects on the health. UR - https://ejchem.journals.ekb.eg/article_202654.html L1 - https://ejchem.journals.ekb.eg/article_202654_3f76fff3d5ed6f282762c3a03dabc20a.pdf ER -