The objective of the study was to evaluate the lambs' performance in the suckling and finishing phases in different nutritional systems. The study was carried out in two phases: suckling (from birth to weaning) and finishing (from weaning to slaughter). Each phase was evaluated in two experimental periods (characterized by year). The suckling phase used 76 lambs divided into two groups: control (without supplementation) and creep feeding (with creep feeder supplementation of 20 g/kg of body weight). The lambs were distributed in the treatments according to sex and type of delivery (single or twin). The finishing phase was characterized from weaning to slaughter. Sixty-two lambs were used, 28 females and 34 males, average age of 85 days and an average weight of 19 kg, and the animals were distributed in treatments according to weight and sex. Five treatments were evaluated, animals in Brachiaria spp. receiving increasing levels of supplementation (0%, 0.8%, 1.6%, and 2.4% of BW) and confinement as a positive performance control. The creep feeding treatment presented superior performance with an average daily gain of 64.85 g more than the control treatment, which anticipated the shorter age at weaning with higher weaning weight (weaning in 64 days for supplemented lambs and 77 days for animals without supplementation). In the finishing phases, the lambs of the treatments 1.6%BW and 2.4%BW presented average daily gain similar to the confined animals and higher (p<0.05) than the treatments 0.8%BW and 0%BW. We recommend that ad libitum supplementation of creep feeding during the suckling phase is a nutritional strategy to wean heavier lambs and consequently reduce time in the finishing phase. For fattening the lambs, we recommend the inclusion of protein-energy supplementation of 1.6% BW for lambs produced in the tropical pasture.
AOAC. 2000. Official Methods of Analysis of AOAC International. 17th Ed. Gaithersburg.
Cappelle, E. R., S. C. Valadares Filho, J. F. C. Silva, & P. R. Cecon. 2001. Estimativas do valor energético a partir de características químicas e bromatológicas dos alimentos. Revista Brasileira de Zootecnia 30:1837-1856. https://doi.org/10.1590/S1516-35982001000700022
Carvalho, D. M. G., M. C. L. Portella, L. T. Menezes, J. R. Rufino, C. A. S. Braga, L. Terres, & J. Q. Soares. 2019. Suplementação energética, proteica ou múltipla para ovinos alimentados com forragem tropical de baixa qualidade. Boletim de Indústria Animal 76:1-12. https://doi.org/10.17523/bia.2019.v76.e1448
Emerenciano Neto, J. V., G. S. Difante, Â. M. Q. Lana, H. R. Medeiros, E. M. Aguiar, D. B. Montagner, & J. S. Souza. 2019. Forage quality and performance of sheep in Massai grass pastures managed at pre-grazing canopy heights. S. Afr. J. Anim. Sci. 48:1074-1081. https://doi.org/10.4314/sajas.v48i6.10
Gallo, S. B., M. B. Arrigoni, A. L. S. C. Lemos, M. M. H. Haguiwara, & H. V. A. Bezerra. 2019. Influence of lamb finishing system on animal performance and meat quality. Acta. Sci. 41:1-8. https://doi.org/10.4025/actascianimsci.v41i1.44742
Gordon, H. M. C. L. & H. V. Whitlock. 1939. A new technique for counting nematode eggs in sheep faeces. Journal of the Council for Scientific and Industrial Research 12:50-52.
Heimbach, N. S., C. C. B. F. Ítavo, L. C. V. Ítavo, R. C. Brumatti, G. S. Difante, A. M. Dias, K. L. S. M. Ferelli, T. F. S. S. Arco, A. L. C. Gurgel, C. O. O. Frangiotti, & P. C. G. Silva. 2019. Weaning age of lambs creep-fed while grazing on marandu pasture. Journal of Agricultural Studies 7:22-37. https://doi.org/10.5296/jas.v7i4.15354
Ítavo, L. C. V., A. D. V. de Souza, S. P. Fávaro, C. C. B. F. Ítavo, H. V. Petit, A. M. Dias, M. G. Moraes, R. G. Coelho, F. A. Reis, J. A. A. Costa, & R. Roscoe. 2016. Intake, digestibility, performance, carcass characteristics and meat quality of lambs fed different levels of crambe meal in the diet. Anim. Feed Sci. Technol. 216:40–48. https://doi.org/10.1016/j.anifeedsci.2016.02.015
Jacques, J., R. Berthiaume, & D. Cinq-marsa. 2011. Growth performance and carcass characteristics of Dorset lambs fed different concentrates: Forage ratios or fresh Grass. Small Rumin. Res. 95:113–119. https://doi.org/10.1016/j.smallrumres.2010.10.002
Koritiaki, N. A., E. L. A. Ribeiro, D. C. Scerbo, I. Y. Mizubuti, L. D. F. Silva, M. A. A. F. Barbosa, C. L. Souza, & F. H. P. Paiva. 2012. Fatores que afetam o desempenho de cordeiros Santa Inês puros e cruzados do nascimento ao desmame. Revista Brasileira de Saúde e Produção Animal 14:259-270. https://doi.org/10.1590/S1519-99402012000100023
Kozloski, G. V. 2011. Bioquímica dos Ruminantes. 3th Ed. UFSM, Santa Maria.
McCoard, S. A., O. Cristobal-Carballo, F. W. Knol, A. Heiser, M. A Khan, N. Hennes, P. Johnstone, S. Lewis, & D. R. Stevens. 2020. Impact of early weaning on the small intestine, development of the metabolic, immune and endocrine system, growth and body composition in artificially reared lambs. J. Anim. Sci. 98:skz356. https://doi.org/10.1093/jas/skz356
Mcmeniman, N. P. 1997. Methods of Estimating Intake of Grazing Animals. In: Simpósio Sobre Tópicos Especiais em Zootecnia. Proceedings of the 34th Reunião Anual da Sociedade Brasileira de Zootecnia. Juiz de Fora. 131-168.
Melo, G. K. A., C. C. B. F. Ítavo, K. L. S. Monteiro, J. A. S. Silva, P. C. G. Silva, L.C.V. Ítavo, D. G. L. Borges, & F. A. Borges. 2017. Effect of creep-fed supplement on the susceptibility of pasture-grazed siclkling lambs to gastrointestinal helminths. Vet. Parasitol. 239:26-30. https://doi.org/10.1016/j.vetpar.2017.04.017
Melo, G. K. A., C. C. B. F. Itavo, L. C. V. Itavo, F. A. Borges, A. M. Dias, M. G. Morais, J. A. Silva, P. C. G. Silva, K. L. S. Ferelli, & F. A. Reis. 2019. Performance, ingestive behavior and gastrointestinal helminths control of suckling lambs supplemented in creep-fed and not supplemented in tropical pastures. Journal of Agricultural Studies 7:87-106. https://doi.org/10.5296/jas.v7i4.15415
Mertens, D. R. 2002. Gravimetric determination of amylase-treated neutral detergent fiber in feeds with refluxing in beaker or crucibles: collaborative study. J. AOAC Int. 85:1217-1240.
National Research Council. 1985. Nutrient Requirements of Small Ruminants. The National Academy Press, Washington, DC.
National Research Council. 2007. Nutrient Requirements of Small Ruminants: Sheep, Goats, Cervids, and New World Camelids. The National Academic Press, Washington, DC. https://doi.org/10.17226/11654.
Oliveira, J. S., J. V. Emerenciano Neto, R. S. Santos, B. R. S. Bonfim, F. N. Lista, V. A. Vieira, & G. S. Difante. 2019. Structural and productive characteristics of urochloa cultivars submitted to different defoliation frequencies in semiarid region. Journal of Agricultural Studies 7:91-102. https://doi.org/10.5296/jas.v7i3.15177
Pires, C. C., L. Muller, C. J. Tonetto, & S. Carvalho. 2011. Influência do tipo de parto e do sexo no desempenho e nas características da carcaça de cordeiros cruza Ile Revista Ceres 58:432-437. https://doi.org/10.1590/S0034-737X2011000400005
Silva, P. C. G., C. C. B. F. Itavo, L. C. V. Itavo, M. G. Morais, J. A. Silva, N. S. Heimbach, G. K. A. Melo, & M. C. M. Costa. 2017. Protein-energy supplementation for lambs: feed intake, ingestive behavior, rumen parameters and nutrient digestibility. Semin. Cienc. Agrar. 38:2631-2640. https://doi.org/10.5433/1679-0359.2017v38n4Supl1p2631
Silva, P. C. G., C. C. B. F. Itavo, L. C. V. Itavo, M. N. B. Gomes, G. L. D. Feijó, K. S. M. Ferelli, N. S. Heimbach, J. A. Silva, G. K. A. Melo, & M. W. F. Pereira. 2020. Carcass traits and meat quality of Texel lambs raised in Brachiaria pasture and feedlot systems. Animal Science Journal 91:1-11. https://doi.org/10.1111/asj.13394
Van Soest, P. J. 1994. Nutritional Ecology of the Ruminant. Ithaca. Comstock Publication Association. https://doi.org/10.7591/9781501732355
Yang, B., B. He, S. S. Wang, J. X. Liu, & J. K. Wang. 2015. Early supplementation of starter pellets with alfafa improves the performance of pre-and postweaning Hu lambs. J. Anim. Sci. 93:4984-4994. https://doi.org/10.2527/jas.2015-9266
This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.
Authors submitting manuscripts should understand and agree that copyright of manuscripts of the article shall be assigned/transferred to Tropical Animal Science Journal. The statement to release the copyright to Tropical Animal Science Journal is stated in Form A. This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License (CC BY-SA) where Authors and Readers can copy and redistribute the material in any medium or format, as well as remix, transform, and build upon the material for any purpose, but they must give appropriate credit (cite to the article or content), provide a link to the license, and indicate if changes were made. If you remix, transform, or build upon the material, you must distribute your contributions under the same license as the original.