02331naa a2200241 a 450000100080000000500110000800800410001902200140006002400270007410000190010124501130012026000090023350000560024252015240029865300160182265300230183865300220186170000190188370000170190270000140191970000170193377301390195010639352023-01-03       2022    bl uuuu     u00u1 u    #d  a1439-03967 a10.1111/jpn.137942DOI1 aFEDRIGO, J. K.  aEffect of creep feeding with rice bran and temporary weaning on cow-calf performance.h[electronic resource]  c2022  aArticle history: First published: 16 December 2022.  aThis study was conducted to investigate if calves supplemented with rice bran in a creep feeding (CF) system associated with temporary weaning (TW) affects the performance of the cow-calf pair grazing natural grasslands during summer. Two experiments were performed using 275 cow-calf pairs of British breeds and their crosses of different parities (primiparous [n = 188] in Experiment 1 and multiparous [n = 87] in Experiment 2). In both experiments, the factors evaluated were: (1) supplementation of calves with rice bran using CF: yes (+CF) or no (-CF); (2) TW for 14 days using nose plates: yes (+TW) or no (?TW). Four experimental groups were formed in both experiments: -CF - TW, -CF + TW, +CF -TW and +CF + TW. TW decreased the average daily weight gain and live weight of calves independently of the age of their mothers. The use of CF decreased both of these parameters in calves born to primiparous cows, and there was no response in the case of calves born to multiparous cows. A greater proportion of primiparous cows that received +CF conceived in the first 21 days of mating (+CF -TW= 63.5% and +CF +TW= 50%) than the other groups. The final pregnancy rate was similar among groups in both experiments. In conclusion, TW decreased the average daily weight gain and weaning weight of calves. Supplementation of calves born to primiparous cows with rice bran decreased their daily weight gain during the period of TW and their weaning weight, but their dams were conceived earlier.  © 2022 Wiley-VCH GmbH.  aBEEF CATTLE  aCALF WEANING WEIGH  aHERBAGE ALLOWANCE1 aSANTA CRUZ, R.1 aDA SILVA, C.1 aBÁEZ, F.1 aVIÑOLES, C.  tJournal of Animal Physiology and Animal Nutrition, (Berl), 2022, Dec 16. Online ahead of print. doi: https://doi.org/10.1111/jpn.13794