This study aimed to identify the best green-leaf offerings of Urochloa brizantha cv. Marandu for pasture-finished lambs receiving protein-energy supplementation at the rate of 1.6% of their body weights (BW). The animals were assigned into four treatments, which consisted of varied green-leaf offerings, namely, 105, 90, 75, or 60 g of dry matter/kg of body weight (BW). Sixty-eight contemporary Texel × mixed-breed lambs with an average initial BW of 22.6 kg were used over two years of experiment. The experiment was set up in a completely randomized design, the data were evaluated by analysis of variance and the means were compared by Tukey’s test at the 0.05 significance level. There was no significant effect of year neither interaction of year with green-leaf offer. There were significant effects of leaf offer on dry matter intake (DMI) with behavior of positively linear (p<0.05). There were significant effects of green-leaf offer on final BW and average daily gain, and lambs receiving of 75 g/kg green-leaf offer showed the highest ADG (179 g/d). There were no significant differences in the carcass, meat, and primal cuts between the groups of lambs receiving different herbage offerings. There were significant effects of leaf offer on slaughter weight, hot carcass weight, and subcutaneous fat thickness. Lambs receiving of 75 g/kg leaf offer showed the highest SFT (5.8 mm). Slaughter weight and hot carcass weight averaged 41.52 kg and 20.07 kg, respectively. We recommend the treatment with leaves offer of 75 g/kg BW of Marandu pasture for the finishing of lambs supplemented at 1.6% of BW.
Araújo Filho, J. T., R. G. Costa, A. B. Fraga, W. H. Sousa, M. F. Cezar, & A. S. M. Batista. 2010. Desempenho e composição da carcaça de cordeiros deslanados terminados em confinamento com diferentes dietas. R. Bras. Zootec. 39: 363-371. https://doi.org/10.1590/S1516-35982010000200020
Costa, H. H. A., E. O. S. Saliba, D. B. Galvani, A. V. Landim, L. D. Lima2, A. L. C. C. Borges, M. A. D. Bomfim, I. Borges, & F. A. Silva. 2018. Efeito da suplementação com sulfato de zinco ou propilenoglicol em ovinos em uma pastagem nativa da Caatinga no período chuvoso: desempenho, características da carcaça e da carne. Arq. Bras. Med. Vet. Zootec. 70: 993-1003. https://doi.org/10.1590/1678-4162-8998
Costa, M. C. M., L. C. V. Ítavo, C. C. B. F. Ítavo, A. M. Dias, H. Petit, F. A. Reis, R. C. Gomes, E. S. Leal, M. V. G. Niwa, & G. J. Moraes. 2019. Evaluation of internal and external markers to estimate faecal output and feed intake in sheep fed fresh forage. Anim. Produc. Sci. 59:741-748. https://doi.org/10.1071/AN16567
Euclides, V. P. B., D. B. Montagner, M. C. M. Macedo, A. R. Araújo, G. S. Difante, & R. A. Barbosa. 2019. Grazing intensity affects forage accumulation and persistence of Marandu palisadegrass in the Brazilian savannah. Grass. Forage. Sci. 75:1-13. https://doi.org/10.1111/gfs.12422
Euclides, V. P. B., P. C. Costa, K. Euclides Filho D. B. Montagner, & G. R Figueiredo. 2018. Biological and economic performance of animal genetic groups under different diets. Biosci. J. 34:1683-1692. https://doi.org/10.14393/BJ-v34n6a2018-39808
Goering, H. K. & P. J. Van Soest. 1970. Forage Fiber Analysis (apparatus, reagents, procedures and some applications), USDA Agricultural Handbook. 379:20.
Gois, G. C., E. M. Santos, W. H. Sousa, J. P. F. Ramos, P. S. Azevedo, J. S. Oliveira, G. A. Pereira, & A. F. Perazzo. 2017. Qualidade da carne de ovinos terminados em confinamento com dietas com silagens de diferentes cultivares de sorgo. Arq. Bras. Med. Vet. Zootec. 69: 1653-1659. https://doi.org/10.1590/1678-4162-9231
Gordon, H. Mc. L. & H. V. Whitlock. 1939. A new technique for counting nematode eggs in sheep faeces. J. Counc. Scient. Indust Res. 1939; 12: 50-52.
Ítavo, C. C. B. F., L. C. V. Ítavo, C. A. T. Esteves, G. A. Sapaterro, J. A. Silva, P. C. G. Silva, K. L. S. M. Ferelli, & T. F. F. S. Arco. 2019. Influence of solid residue from alcoholic extraction of brown propolis on intake, digestibility, performance, carcass and meat characteristics of lambs in feedlot. J. Anim. Feed Sci. 28:149-158. https://doi.org/10.22358/jafs/109284/2019
Lippke, H. 2002. Estimation of forage intake by ruminants on pasture. Crop Sci. 42, 869-872. https://doi.org/10.2135/cropsci2002.8690
McDougall, E. I. 1948. Studies on ruminant saliva. 1. The composition and output of sheep’s saliva. J Bioch. 43:99-109. https://doi.org/10.1042/bj0430099
NRC (National Research Council). 2007. Nutrient requirements of small ruminants 2th Rev. Ed. National Academy Press, Washington DC
Oliveira, J. P. F., M. A. Ferreira, A. P. D. Freitas, S. A. Urbano, & Á. E. M. Silva. 2017. Carcass characteristics in Santa Inês sheep fed with mazoferm as a substitution for soybean meal. Rev. Ciênc. Agron. 48: 708-715. https://doi.org/10.5935/1806-6690.20170082
Oliveira, R. G., T. V. Voltolini, C. Mistura, A. S. Moraes, R. A. Souza, & B. R. C. Santos. 2016. Productive performance and carcass characteristics of lambs grazing on pastures of two cultivars of Buffel grass and three forage allowance. Rev. Bras. Saúde Prod. An. 17:374-384. https://doi.org/10.1590/S1519-99402016000300005
Osório J. C., M. N. Oliveira, P. O. Jardim, & E. M. Monteiro. 1996a. Meat production in sheep of five genotypes. 2. Live weight components. Cienc. Rural. 26:471-475. https://doi.org/10.1590/S0103-84781996000300023
Osório, J. C., N. M. Oliveira, A. P. Nunes, & J. L. Pouey. 1996b. Meat production in sheep of five genotypes. 3. Losses and morphology. Cienc. Rural. 26:477-481. https://doi.org/10.1590/S0103-84781996000300024
Osório, J. C. S., M. T. M. Osório, F. M. Vargas Junior, A. R. M. Fernandes, L. O. Seno, H. A. Ricardo, F. C. Rossi, & M. A. P. Orrico Junior. 2012. Criteria for animal slaughter and the meat quality. Rev. Agrarian. 5:433-443. http://ojs.ufgd.edu.br/index.php/agrarian/article/view/1822
Pearce, K. L., K. Rosenvold, H. J. Andersen, & D. L. Hopkins. 2011. Water distribution and mobility in meat during the conversion of muscle to meat and ageing and the impacts on fresh meat quality attributes - A review. Meat Sci. 89: 111-124. https://doi.org/10.1016/j.meatsci.2011.04.007
Rezende, P. L. P., J. Restle, U. O. Bilego, J. J. R. Fernandes, R. L. Missio, & T. P. Guimarães. 2019. Carcass characteristics of feedlot-finished Nellore heifers slaughtered at different weights. Acta Sci. Anim. Sci. 41: e44826. https://doi.org/10.4025/actascianimsci.v41i1.44826
RIISPOA. ‘Regulamento da Inspeção Industrial e Sanitária de Produtos de Origem Animal’. 1997. Brasília-DF: Ministério da Agricultura. p.35.
Russel, A. J. F., J. M. Doney, & R. G. Gunn. 1969. Subjective assessment of body fat in live sheep. J. Agric. Sci. 72:451-454. https://doi.org/10.1017/S0021859600024874
Silva, J. A. 2016a. Produção de cordeiros em diferentes sistemas de cria e terminação em pastagens de Urochloa spp. Tese (Doutorado) - Faculdade de Medicina Veterinária e Zootecnia, Universidade Federal de Mato Grosso do Sul, Campo Grande, MS. Brazil.
Silva, P. C. G. 2016b. Características de carcaça e carne de cordeiros produzidos em diferentes sistemas de terminação. Tese (Doutorado) - Faculdade de Medicina Veterinária e Zootecnia, Universidade Federal de Mato Grosso do Sul, Campo Grande, MS. Brazil.
Silva, J. A., C. C. B. F. Ítavo, L. C. V. Ítavo, M. G. Morais, P. C. G. Silva, K. L. S. M. Ferelli, & T. F. F. S. Arco. 2019. Dietary addition of crude form or ethanol extract of brown propolis as nutritional additive on behaviour, productive performance and carcass traits of lambs in feedlot. J. Anim. Feed Sci. 28: 31-40. https://doi.org/10.22358/jafs/105442/2019
Souza, R. A., T. V. Voltolini, L. G. R. Pereira, S. A. Moraes, D. B. Manera, & G. G. L. Araújo. 2010. Productive performance and carcass traits of lambs grazing on irrigated pastures and receiving increasing concentrate levels. Acta Sci Anim Sci. 32:323-329. https://doi.org/10.4025/actascianimsci.v32i3.8320
Tilley, J. M. A. & R. A. Terry. 1963. A two stage technique for the in vitro digestion of forage crops. J. British. Grassl. Society. 18:104-111. https://doi.org/10.1111/j.1365-2494.1963.tb00335.x
Trindade, T. F. M., G. S. Difante, J. V. Emerenciano Neto, L. S. Fernandes, I. M. M. Araújo, E. L. L. Véras, M. G. Costa, M. G. T. Silva, & M. C. Medeiros. 2018. Biometry and carcass characteristics of lambs supplemented in tropical grass pastures during the dry season. Biosci. J. 34: 172-179. https://doi.org/10.14393/BJ-v34n1a2018-36781
Urbano, S. A., M. A., Ferreira, R. M. L. Véras, P. S. Azevedo, H. B. Santos Filho, G. A. Vasconcelos, & J. P. O. Oliveira. 2015. Características de carcaça e composição tecidual de ovinos Santa Inês alimentados com manipueira. Ver. Bras. Ciênc. Agrar. 10: 466-472. https://doi.org/10.5039/agraria.v10i3a4812
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