Stable isotopes turnover of carbon-13 and nitrogen-15 in plasma and milk serum of cows fed with poultry litter

• Grant number: 14/15672-7
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: October 01, 2014
• End date: September 30, 2015
• Field of knowledge: Agronomical Sciences - Animal Husbandry - Animal Production
• Principal Investigator: Carlos Ducatti
• Grantee: Rodrigo da Silva Gennari
• Host Institution: Instituto de Biociências (IBB). Universidade Estadual Paulista (UNESP). Campus de Botucatu. Botucatu , SP, Brazil

Abstract

Since the crisis of bovine spongiform encephalopathy or "mad cow" disease, and recent outbreaks of avian influenza in Japan, Russia and Europe, concerns about the use of poultry by-products in animal feeding has increasing. Because of the consumer's worry about the safety of food, were created by countries new laws and barriers to boost the consumer confidence in markets. However, due to shortage of methods that detect in the product that the animal was fed byproduct prohibited by law, is of great importance a search for tools that assess a product monitoring. Several studies about the use of stable isotope technique enable tracking the type of feed given to the animal through the isotopic analysis of their products. The aim of this work is to study the turnover of carbon-13 and nitrogen-15 to determine the time of incorporation of the isotopic signature of the diet in whey and blood plasma of dairy cows fed or not bed aviary. Twelve dairy cows will be evaluated by 91 days and divided into two treatments, the first with control diet strictly vegetable, and the second with the inclusion of poultry litter in the diet. The data will be analyzed by the method of exponential equations of Minitab® 16 (2010).