Production and proximate composition in milk of Bergamácia ewes supplemented with linseed oil or meal (Linum usitatissimum L)

• Grant number: 13/09946-4
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Effective date (Start): July 01, 2013
• Effective date (End): June 30, 2014
• Field of knowledge: Agronomical Sciences - Animal Husbandry - Animal Production
• Principal Investigator: Edson Ramos de Siqueira
• Grantee: Laura Dias Fernandes
• Host Institution: Faculdade de Medicina Veterinária e Zootecnia (FMVZ). Universidade Estadual Paulista (UNESP). Campus de Botucatu. Botucatu , SP, Brazil

Abstract

Functional foods are defined as those which provide additional benefits to the food and may reduce the risk of diseases. Conjugated linoleic acid (CLA) on human health is excellent and offers a nutraceutical effect, acting as an anti-carcinogen. May be formed in the rumen through the incomplete biohydrogenation of polyunsaturated fatty acid, supplied by the dietary ingredients of the animal, such as flaxseed. The use of oil in the feed, as a source of fat instead of oilseeds, can increase the level of conjugated linoleic acid (CLA). If the milk or its derivatives reveals the presence of CLA and compounds of antioxidant and nitrogen (polyamines, phenols, and nitrates) at satisfactory levels may be marketed with differentiation, and provide a value-adding end of the income producer. The project will be executed in the Research Unit and EWE Milk Production, Faculty of Veterinary Medicine, UNESP, Botucatu Campus, SP, and will be used 75 Bergamasca ewes, divided into three groups: A) ewe supplemented with concentrate B) ewe supplemented with concentrate and linseed oil and C) ewe supplemented with linseed meal concentrate. The food will consist of corn silage as forage and concentrate specifically to each treatment. All the ewes are milked mechanically for 60 days beginning on the 31st day after delivery. During milking, every 14 days, will be collected milk samples for analysis of pH, Dornic acidity, density, amount of urea excreted, and determination of the chemical composition and the somatic cell count. Every 14 days, from the 5th day after delivery, will be frozen milk samples for fatty acid profile forwarded to the Clinic's Milk (ESALQ / USP) in Piracicaba - SP. Every 14 days during the experimental period, samples are collected from corn silage and total diet for further analysis in the laboratory of the Department of Food Science and Nutrition Improvement animal FMVZ - UNESP / Botucatu. Will determine the dry matter (DM), crude protein (CP), neutral detergent fiber (NDF), acid detergent fiber (ADF), lignin (LIG), hemicellulose (HEM), and cellulose (CEL). The CP will be analyzed according to the methodology described by Silva (2002). The sequence analysis method proposed by Van SOEST et al. (1991), will be used to determine the fractions NDF, ADF, lignin, cellulose, and hemicellulose. Will also be analyzed the levels of conjugated linoleic acid. (AU)