Artigo Acesso aberto

Influence of the nature of alpine pastures on plasmin activity, fatty acid and volatile compound composition of milk

2001; EDP Sciences; Volume: 81; Issue: 3 Linguagem: Francês

10.1051/lait

ISSN

1297-9694

Autores

Christophe Bugaud, S Buchin, Jean-Baptiste Coulon, Agn�s Hauwuy, Didier Dupont,

Tópico(s)

Nuts composition and effects

Resumo

The influence of pastures on milk characteristics was studied in natura in the Abondance cheese area (Haute-Savoie, France) on 10 diversified pastures exploited by 3 dairy farmers.The effects of the herd were controlled and measured by feeding an identical hay to herds.The plasmin activity and the concentration of long-chain poly-unsaturated fatty acids in milks produced in mountain pastures (n = 5, 1 500 and 1 850 m) were significantly higher (P < 0.001 and P < 0.05 respectively) than in milks from valley pastures (n = 5, 850 and 1 100 m).The terpene composition of milk was linked to the terpene composition of pastures.Milks from the pastures rich in dicotyledons, in particular Apiaceae, contained a greater quantity and a wider variety of terpenes, than milks from the pastures rich in Gramineae.The other volatile compounds, casein composition, calcium and phosphorus contents did not seem to be influenced by the type of pasture. pasture / milk / plasmin / fatty acid composition / volatile compoundRésumé -Influence de la nature de pâturages alpins sur l'activité de la plasmine, la composition en acides gras et en composés volatils du lait.L'influence de la nature des pâturages sur les caractéristiques des laits a été étudiée in natura dans la zone du fromage d'Abondance (Haute-Savoie, France) sur 10 types de pâturages divers exploités par 3 producteurs.Les effets liés au troupeau ont été contrôlés et mesurés sur une période où les 3 troupeaux recevaient la même alimentation.L'activité de la plasmine et la teneur en acides gras poly-insaturés à 18 carbones étaient plus élevées dans les laits des pâturages de montagne (n = 5, 1 500-1 850 m) que celles des laits de pâturages de vallée (n = 5, 850-1100 m) (respectivement P < 0,001, P < 0,05).La composition en terpènes des laits est 401

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