Sources of omega-6 fatty acids do not alter the rumen degradation and transit of fibre from dairy cow diets

• Autorzy: Bettero V.P. , Gandra J. R. , Nunes H. V. N. , Freitas,Jr J. E. , Barletta R. V. , Carvalho M. V. , Detmann E. , Pereira J. C.
• Języki publikacji: EN

Abstrakty

EN

The objective of this study was to evaluate the behaviour of fibre in the digestive tract on the basis of the passage kinetics of forage and concentrate particles in cows fed different omega-6 fatty-acid sources. The scientific hypothesis of this study was that omega-6 fatty acids do not interfere with the digestion of fibre in the diets of dairy cows. Five primiparous lactating Holstein cows were used in the experiment. The experimental diets were: control (C), ground soyabean (GS), cottonseed (CS), soyabean oil (SO), calcium salts of fatty acids (CSFA). The global mean estimates for the parameters of passage rate (γ) were 0.038 and 0.055 h–1 for forage and concentrate, respectively. The only significant effect with respect to the passage rate was a high negative correlation between the concentrate passage rate and dry matter intake. There was less undegradable neutral detergent fibre (NDF) in treatments without added lipid. Dietary supplementation with lipid sources does not alter the kinetic parameters of roughage and concentrate particle passage or in vitro NDF degradation. Sources of omega-6 fatty acids do not alter the rumen degradation and transit of fibre.

Słowa kluczowe

EN

fatty acid source; omega-6 fatty acid; rumen degradation; fibre; dairy cow; animal diet; polyunsaturated fatty acid

• Wydawca: -
• Czasopismo: Journal of Animal and Feed Sciences
• Rocznik: 2013
• Tom: 22
• Numer: 4
• Opis fizyczny: p.295-301,ref.

Twórcy

autor

Bettero V.P.

• Department of Animal Science, School of Agrarian and Veterinary Science Jaboticabal, State University of Sao Paulo, Sao Paulo, Brazil

autor

Gandra J. R.

• Department of Animal Science, School of Agrarian Sciences, Federal University of Great Dourados, Rodovia Dourados, Itahum, Km 12, Cidade Universitaria, Caixa Postal 533, CEP: 79.804-970, Dourados, Mato Grosso do Sul, Brazil

autor

Nunes H. V. N.

• Department of Animal Science, Federal University of Vicosa, Vicosa, Minas Gerais, Brazil

autor

Freitas,Jr J. E.

• Department of Animal Science, School of Agrarian and Veterinary Science Jaboticabal, State University of Sao Paulo, Sao Paulo, Brazil

autor

Barletta R. V.

• Department of Animal Nutrition and Production, School of Veterinary Medicine and Animal Science, University of Sao Paulo, Pirassununga, Sao Paulo, Brazil

autor

Carvalho M. V.

• Department of Animal Nutrition and Production, School of Veterinary Medicine and Animal Science, University of Sao Paulo, Pirassununga, Sao Paulo, Brazil

autor

Detmann E.

• Department of Animal Science, Federal University of Vicosa, Vicosa, Minas Gerais, Brazil

autor

Pereira J. C.

• Department of Animal Science, Federal University of Vicosa, Vicosa, Minas Gerais, Brazil

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