Gallo Sarita Bonagurio, Brochado Thais, Ariboni Brandi Roberta, da Silva Bueno Ives Cláudio, Passareli Daniele, Birgel Daniela Becker, Birgel Junior Eduardo Harry
Faculty of Animal Science and Food Engineering, University of Sao Paulo, Av Duque de Caxias Norte, 225, Pirassununga, Sao Paulo, Brazil.
Trop Anim Health Prod. 2019 May;51(4):767-773. doi: 10.1007/s11250-018-1750-0. Epub 2018 Nov 19.
The objective of this study was to evaluate the effects of different levels of NDF in high-concentrate diets on performance and aspects ruminal, blood, and carcass parameters of finishing lambs. Twenty-four lambs, with initial BW of 24 ± 3 kg, were randomly divided into individual pens, in a completely randomized design, comprising three treatments with eight repetitions each. The treatments consisted of dietary levels of 15%, 20%, and 25% of NDF, based on DM. The diets were composed of corn, soybean meal, minerals, and corn silage and were offered twice a day, with daily control of what was offered and refused, to determine dry matter intake (DMI). The animals were weighed weekly and slaughtered after 50 days of confinement. Performance evaluations, blood parameters, carcass, and ruminal parameters were evaluated. Lambs fed with lower dietary fiber had better carcass yield (P < 0.005). Blood count, blood biochemical parameters, rumen short-chain fatty acid production and protozoan population were not affected by the dietary NDF level. It was concluded that in high-concentrate diets with 15% NDF resulting in better weight gain of the animals in the confinement, good carcass yields without the animal having altered health and ruminal parameters.
本研究的目的是评估高能量日粮中不同中性洗涤纤维（NDF）水平对育肥羔羊生产性能、瘤胃、血液和胴体参数方面的影响。24只初始体重为24±3千克的羔羊，采用完全随机设计，随机分为个体栏，共三种处理，每种处理8个重复。处理包括基于干物质（DM）的NDF日粮水平分别为15%、20%和25%。日粮由玉米、豆粕、矿物质和玉米青贮组成，每天投喂两次，每天记录投喂量和剩余量，以确定干物质采食量（DMI）。每周对动物进行称重，并在圈养50天后屠宰。对生产性能、血液参数、胴体和瘤胃参数进行评估。饲喂较低膳食纤维日粮的羔羊胴体产率更高（P<0.005）。日粮NDF水平对血细胞计数、血液生化参数、瘤胃短链脂肪酸产量和原生动物数量没有影响。得出的结论是，在含有15%NDF的高能量日粮中，动物在圈养期体重增加更好，胴体产率良好，且动物健康和瘤胃参数未发生改变。
