Pierre Noziere

TL;DR: Methods to study ruminant N metabolism have been developed over 150 yr of animal nutrition research, but many of them are laborious and impractical for application on a large number of animals and results can be variable, especially the methods based on measurements of digesta or blood flow.

TL;DR: It is confirmed that on average Δ15Nanimal-diet can predict NUE variation across diets and across individuals reared under similar conditions, and there may be a biased prediction for animals close to zero, or in negative, N balance.

TL;DR: In this article, a model was developed that describes the relationship between the production, the ruminal concentrations and the fluxes of volatile fatty acids across portal drained viscera (PDV).

TL;DR: A new method to improve the accuracy of CH4 emissions that complies with IPCC rules for a Tier 3 method is described and evaluated, using a robust equation based on digestible organic matter intake corrected for the digestive interactions to predict CH4 consistently from enteric and manure sources.

TL;DR: The authors' results could indicate a lower mammary uptake of C18:0 and trans-11 C 18:1 in proportion to their respective duodenal flow, with no associated change in mammary Δ9-desaturase activity when cows were fed marine products.