Method for evaluating the amount of methane produced by a...

G - Physics – 01 – N

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G01N 33/06 (2006.01) A23K 1/18 (2006.01)

Patent

CA 2728307

The present invention relates in particular to a method for evaluating the amount of methane produced by a dairy ruminant. It is characterized in particular in that it comprises the determination of the ratio between the amount of fatty acids with 16 carbon atoms or less, termed FA<C16, and the sum of the total fatty acids of the milk, wherein said fatty acids are those present in the milk produced by said ruminant, and wherein said amount of methane is defined by the following equation: amount CH4 = (FA<C16/total FA) * a * (milk production)b, where amount CH4 (in g/litre of milk) = amount of methane produced; FA<C16 = amount of fatty acids with 16 carbon atoms or less; total FA = total amount of fatty acids; expression of the (FA<C16)/(total FA) ratio as % of total FA; milk production = amount of milk produced in kg of milk/animal and per year; a and b are numerical parameters, with a between 10 and 13 and b between -0.40 and -0.45.

La présente invention se rapporte notamment à un procédé d'évaluation de la quantité de méthane produite par un ruminant laitier. Il se caractérise notamment par le fait qu'il comprend la détermination du rapport entre la quantité d'acides gras avec 16 atomes de carbone ou moins, dite AG < C16 et la somme des acides gras totaux du lait, lesdits acides gras étant ceux présents dans le lait produit par ledit ruminant, ladite quantité de méthane étant définie par la relation suivante : Quantité CH4 = (AG < C16/AG totaux) * a * (production de lait)b où quantité CH4 (en g/litre de lait) = quantité de méthane produite; AG < C16 = quantité d'acides gras avec 16 atomes de carbone ou moins; AG totaux = quantité totale d'acides gras; expression du rapport (AG < C16)/(AG totaux) en % des AG totaux; production de lait = quantité de lait produite en kg de lait/animal et par an; a et b sont des paramètres numériques, avec a compris entre 10 et 13 et b compris entre - 0,40 et - 0,45.

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