02400naa a2200289 a 450000100080000000500110000800800410001902400380006010000170009824501010011526000090021650005450022552009830077065000180175365000130177165000190178465300110180365300210181465300180183565300270185365300190188070000160189970000200191570000170193570000170195277301410196910500472020-04-27       2013    bl uuuu     u00u1 u    #d7 a10.1080/00288233.2013.8403202DOI1 aVIÑOLES, C.  aEffect of creep feeding and stocking rate on the productivity of beef cattle grazing grasslands.  c2013  aHistory article: Received 17 January 2013; accepted 15 August 2013. Acknowledgements The authors would like to acknowledge the staff of the Research unit Glencoe, especially Pablo Cuadro and the graduate students of the Veterinary Faculty of Uruguay: Andrés Michelena, Andrea Martín, Verónica Echenique, Andrés Betancurt, Ignacio Quagliotti and Hector Rosano for their excellent work during the development of the experiment. We would also like to thank Mariana Carriquiry and Paul Kenyon for their critical comments on this manuscript.  aNinety-six Hereford cow-calf pairs grazing Campo grasslands were used in a 2 × 2 factorial design that evaluated stocking rate (high [H] vs low [L]) and creep feeding (CF; yes or no). Creep-fed calves grazing L had a greater average daily gain (1.07 ± 0.03 kg/d) than CF calves grazing H (0.96 ± 0.03 kg/d; P < 0.05), but L?CF (0.78 ± 0.03 kg/d) and H?CF calves (0.73 ± 0.03 kg/d) had similar average daily gains (P > 0.05). Similarly, L+CF calves were heavier at weaning (172 ± 3 kg) than H+CF calves (160 ± 3 kg), but weaning weights between L?CF (144 ± 3 kg) and H?CF (138 ± 3 kg; P > 0.05) did not differ. Creep-fed calves grazed less (39 ± 10%) than non-supplemented calves (58 ± 15%; P < 0.05). Creep feeding had no effect on milk production, body condition and live weight of the dams, so it had no impact on their reproductive performance. We conclude that CF promotes greater live weight gains and weaning weights of Hereford calves grazing Campo grasslands.  aGANADO VACUNO  aPASTURAS  aSUPLEMENTACION  aCALVES  aCAMPO GRASSLANDS  aCREEP FEEDING  aPRODUCTIVE PERFORMANCE  aWEANING WEIGHT1 aJAURENA, M.1 aDE BARBIERI, I.1 aDO CARMO, M.1 aMONTOSSI, F.  tNew Zealand Journal of Agricultural Research, 22 October 2013gv. 56, no. 4, p. 279-287.  http://dx.doi.org/10.1080/00288233.2013.840320