02303naa a2200253 a 450000100080000000500110000800800410001902200140006002400430007410000140011724501410013126000090027250001520028152014190043365000110185265300250186365300160188865300120190465300100191670000200192670000170194670000170196377300690198010593712019-11-22       2019    bl uuuu     u00u1 u    #d  a0921-44887 a10.1016/j.smallrumres.2018.11.0092DOI1 aRAMOS, Z.  aBody and wool growth of lambs grazing on native pastures can be improved with energy and protein supplementation.h[electronic resource]  c2019  aArticle history: Received 16 June 2018 // Received in revised form 5 October 2018 // Accepted 8 November 2018 // Available online 08 November 2018.  aABSTRACT. In a completely randomized experimental design with two replicates, the impact of iso-energetic supplements with different protein levels on body and wool growth was studied in eighty crossbreed (Merino Dohne × Corriedale) castrated male lambs (24.5 ± 4.4 kg of body weight, BW, 4 months of age) in summer (103 days) for three years. Animals were randomly allotted to four treatments (n = 20). All lambs grazed native pastures (NP) and animals in three treatments were daily supplemented (2% BW) with an iso-energetic supplement of different CP levels: control (CON, non supplemented), 12% CP (12CP), 16% CP (16CP) and 20% CP (20CP). Supplemented lambs had higher final BW (36.0, 36.4 and 37.7 kg for 12, 16 and 20CP, respectively) than CON lambs (28.9 kg) (P < 0.05). Among supplemented lambs, the 12CP group had the lowest BW (P < 0.05), without differences between 16CP and 20CP. Supplemented lambs had greater body-weight gain, body condition score, rib eye area and fat thickness than CON lambs (P < 0.05). Wool growth was 40% greater in supplemented lambs compared to CON lambs (P < 0.05), while 20CP animals had the greatest growth. Iso-energetic supplementation with different CP (12, 16 and 20%) levels improved body and wool growth of lambs grazing NP compared to non-supplemented lambs in summer after weaning. Wool growth was greatest when 20% CP supplement was used.  © 2018 Elsevier B.V.  aOVINOS  aBODY CONDITION SCORE  aBODY WEIGHT  aGRAZING  aSHEEP1 aDE BARBIERI, I.1 aVAN LIER, E.1 aMONTOSSI, F.  tSmall Ruminant Research, February 2019, volume 172, pages 92-98.