1 | Research Centre Foulum, Danish Institute of Agricultural Sciences,
Department of Animal Nutrition and Physiology,
PO Box 50, DK-8830 Tjele, Denmark |
2 | EEA Anguil “Ing Agr. Guillermo Covas”, Instituto Nacional de Tecnología Agropecuaria,
P.O. Box 11, 6326 Anguil, La Pampa, Argentina |