Effect of different sources and copper levels on ruminal metabolism and lipid oxidation

• Grant number: 08/01792-0
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: May 01, 2008
• End date: June 30, 2009
• Field of knowledge: Agronomical Sciences - Animal Husbandry - Animal Nutrition and Feeding
• Principal Investigator: Marcus Antonio Zanetti
• Grantee: Janaína Silveira da Silva
• Host Institution: Faculdade de Zootecnia e Engenharia de Alimentos (FZEA). Universidade de São Paulo (USP). Pirassununga , SP, Brazil

Abstract

Summary: Twenty five nelore steers will be used to determine the effect of two copper level and two copper sources (organic and inorganic) on ruminal fermentation and oxidative stability of Longissimus dorsi muscle. Treatments are: 1) Control - no supplemental Cu; 2) Cu - 10 mg/Kg DM (as Cu sulfate); 3) Cu - 10mg/Kg DM (as Cu proteinate); 4) Cu - 30 mg/Kg DM (as Cu sulfate); 5) Cu - 30 mg/Kg DM (as Cu proteinate). The statistical design will be in blocks by body weight and liver copper levels. The VFAs, ammonium nitrogen, ruminal pH and malonaldeide in muscle and liver levels will be analyzed by Proc. GLM of SAS, at the level of 5% of significance.