de Arruda Leite Paulo Márcio Barbosa, Véras Robson Magno Liberal, Véras Antonia Sherlânea Chaves, Guim Adriana, de Souza Evaristo Jorge Oliveira, de Souza Silva Karla Katiene, Barreto Lígia Maria Gomes, de Lima Silva Janaina, Cardoso Daniel Barros
Department of Animal Science, Federal Rural University of Pernambuco, Dom Manoel de Medeiros Street, s/n, Dois Irmãos, Recife, PE, 52171-900, Brazil.
Academic Unit of Garanhuns, Federal Rural University of Pernambuco, Bom Pastor Avenue, s/n, Boa Vista, Garanhuns, PE, 55292-270, Brazil.
Trop Anim Health Prod. 2018 Dec;50(8):1807-1814. doi: 10.1007/s11250-018-1622-7. Epub 2018 May 26.
This aim of this study was to evaluate the intake and apparent digestibility of nutrients, ingestive behavior, blood parameters, and performance of lambs fed two roughage:concentrate (R:C) ratios, with or without liquid residue of cassava (LRC). Forty lambs (19.5 ± 1.45 kg body weight) were distributed in a completely randomized 2 × 2 factorial design. The intake of dry matter (1311 g/day) and total digestible nutrients (755 g/day), and the intake (172 g/day) and digestibility (552 g/kg) of crude protein were higher for lambs fed R:C of 40:60. The R:C ratio of 80:20 promoted a higher intake (585 g/day) and digestibility (461 g/kg) of neutral detergent fiber. There was an intake of LRC of 1.37 L/day for lambs fed R:C of 80:20 and 0.42 L/day for lambs fed R:C of 40:60. The lambs fed R:C of 80:20 spent more time in feeding (326 m/day) and rumination (530 m/day). The metabolic profile and performance of lambs were not affected by LRC inclusion. The body weight gain (220 g/day) was higher in lambs fed R:C of 40:60. A roughage:concentrate ratio of 40:60 is recommended for lambs because it resulted in the best performance, regardless of supplementation with liquid residue of cassava.
本研究的目的是评估饲喂两种粗饲料与精饲料（R:C）比例（添加或不添加木薯液渣（LRC））的羔羊的营养物质摄入量和表观消化率、采食行为、血液参数及生产性能。40只羔羊（体重19.5±1.45千克）采用完全随机2×2析因设计。饲喂R:C为40:60的羔羊干物质摄入量（1311克/天）和总可消化养分摄入量（755克/天），以及粗蛋白摄入量（172克/天）和消化率（552克/千克）更高。R:C为80:20时中性洗涤纤维摄入量（585克/天）和消化率（461克/千克）更高。饲喂R:C为80:20的羔羊LRC摄入量为1.37升/天，饲喂R:C为40:60的羔羊LRC摄入量为0.42升/天。饲喂R:C为80:20的羔羊采食时间（326分钟/天）和反刍时间（530分钟/天）更长。LRC添加对羔羊的代谢概况和生产性能没有影响。饲喂R:C为40:60的羔羊体重增加（220克/天）更多。建议羔羊的粗饲料与精饲料比例为40:60，因为无论是否添加木薯液渣，该比例都能带来最佳生产性能。
