Relationship between CH4 and urinary N outputs in ruminants fed forages: a meta-analysis of the literature - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Animal Production Science Année : 2014

Relationship between CH4 and urinary N outputs in ruminants fed forages: a meta-analysis of the literature

Résumé

Enteric methane (CH4) and faecal and urinary nitrogen (N) are two major pollutants due to ruminants. However, relations between these two components have been seldom studied, and the specific relationships for forage diets are not known. A meta-analysis was conducted using a large database of published data for ruminants fed forages, in which CH4 production, digestibility and urinary N (UN) output were all available. A total of 148 treatments (55 from cattle and 93 from small ruminants) from 29 publications and 56 experiments were used. Globally, there was a positive relationship between CH4 and UN production when expressed either per kg of liveweight or per kg of dry matter (DMI) intake. These relationships were maintained when a subset of 38 experiments that focussed on the influence of variation of DMI were considered. Otherwise, when a subset of 17 experiments that focussed on forage crude protein content were considered, the two equations relating CH4 and UN remained significant but the slopes were much smaller. In conclusion, the positive relationship between CH4 and UN can be mainly explained by the indirect positive influences of DMI or of diet organic matter digestibility on these two parameters
Fichier non déposé

Dates et versions

hal-01173645 , version 1 (07-07-2015)

Identifiants

Citer

Daniel Sauvant, Maguy Eugène, Sylvie Giger-Reverdin, Harry Archimède, Michel Doreau. Relationship between CH4 and urinary N outputs in ruminants fed forages: a meta-analysis of the literature. Animal Production Science, 2014, 54 (9), pp.1423-1427. ⟨10.1071/AN1461⟩. ⟨hal-01173645⟩
56 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More