Resumen de NR 38. Heifers management supplementation in savannas plains conditions. I. Reproductive behavior to two ages supplemented with multinutritional blocks

Beatriz Birbe, Pablo Herrera, Nelson Martínez, M. Hernandez, Domingo Mata

• A group of 42 contemporary zebu crossbred dual-purpose heifers, grazing Trachypogon sp. were randomly assigned to 3 treatments: (T1), group control with commercial minerals (normal farm management); (T2) and (T3) groups that had received supplementation 22 and 30 months of age respectively, with multinutritional blocks (MB) of whole cottonseed (Gossypium hirsutum). Age and the live weight to first detected ovarian activity was significantly (P