Blood variables of lambs fed with methane mitigator diets

• Grant number: 16/06416-2
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: June 01, 2016
• End date: May 31, 2017
• Field of knowledge: Agronomical Sciences - Animal Husbandry - Animal Production
• Principal Investigator: Ives Cláudio da Silva Bueno
• Grantee: Roberta Cavalcante Cracco
• Host Institution: Faculdade de Zootecnia e Engenharia de Alimentos (FZEA). Universidade de São Paulo (USP). Pirassununga , SP, Brazil

Abstract

The objective of the present study was to evaluate the effect of the essential oil of oregano and tannin extract of Acacia mearnsii on blood variables of lambs. The animals used will be 36 male sheep, uncastrated from Dorper x Santa Inês crossing, weaned and approximate average initial weight of 25 kg. The offering of diet will be adjusted every day during the trial period in order to provide daily remains of approximately 10%. The experiment will last 60 days. The experimental design will be a completely randomized blocks. All treatments will consist of a standard diet, being different only in the additives used: treatment 1 - control diet; Treatment 2 - control diet with essential oil of oregano (1 ml/kg of concentrate) and treatment 3 - control diet with tannin extract (5% of the diet DM). The diet will be formulated second NRC (1981) with forage: concentrate ratio of 30:70. Biochemical variables are: triglycerides, total cholesterol, HDL, LDL, urea, urea nitrogen, glucose, albumin, total protein, creatine kinase (CKNAC), gamma-glutamyl transferase (GGT GAMMA), aspartate aminotransferase (AST). The variables analyzed in the blood count will be: total leukocytes, erythrocytes, platelets, hemoglobin, hematocrit, MCV, MCHC, MCH and RDW.