Short Communication : Added value of rumination time for the prediction of dry matter intake in lactating dairy cows - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Journal of Dairy Science Année : 2014

Short Communication : Added value of rumination time for the prediction of dry matter intake in lactating dairy cows

Résumé

The objective of the current study was to quantify the change in the prediction of dry matter intake (DMI) resulting from the inclusion of rumination time (RT) in the 2001 National Research Council (NRC) DMI prediction model. Forty-one Holstein cows fed the same total mixed ration were involved in a 10-wk study. Individual DMI were measured daily. The accuracy and precision of the original NRC prediction model, based on body weight, fat-corrected milk, and week of lactation as independent variables, was compared with the accuracy and precision of the same model with RT as an additional independent variable. The RT estimate was significant in the model developed but had a low value (0.031 kg/h). Root mean square prediction errors were very similar in the 2 models (1.70 and 1.68 kg/d) as were the other indicators (R(2), linear bias, random error, and concordance correlation coefficient) selected to compare the models in this study. These results indicate no gain in DMI prediction precision or accuracy when RT is included in the NRC model.
Fichier principal
Vignette du fichier
14ClémentJDS_1.pdf (361.31 Ko) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte
Loading...

Dates et versions

hal-01210652 , version 1 (27-05-2020)

Identifiants

Citer

Pierre Clement, Raphaël Guatteo, Luc Delaby, Benoît Rouille, A Chanvallon, et al.. Short Communication : Added value of rumination time for the prediction of dry matter intake in lactating dairy cows. Journal of Dairy Science, 2014, 97 (10), pp.6531-6535. ⟨10.3168/jds.2013-7860⟩. ⟨hal-01210652⟩
46 Consultations
40 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More