Siqueira Michelle, Chagas Juana, Monnerat João Paulo, Monteiro Carolina, Mora-Luna Robert, Dubeux José, DiLorenzo Nicolas, Ruiz-Moreno Martin, Ferreira Marcelo
Department of Animal Science, Federal Rural University of Pernambuco, Dom Manoel de Medeiros Street, Dois Irmãos, Recife, Pernambuco 52171-900, Brazil.
Department of Agricultural Research for Northern Sweden, Swedish University of Agricultural Sciences (SLU), 901 83 Umeå, Sweden.
Animals (Basel). 2021 Apr 28;11(5):1266. doi: 10.3390/ani11051266.
This study evaluated the effect of different roughages fed to sheep on nutrient and water intake, ingestive behavior, nitrogen balance, microbial protein synthesis, fermentation parameters, and methane production using an in vitro gas production system. The treatments consisted of five diets: cactus cladodes (NUB) and (OUB), both with the addition of sugarcane bagasse (SB) and urea/ammonium sulfate (urea/as); Tifton hay (TH); corn silage (CS); and sorghum silage (SS), also with added urea/as. The NUB provided greater ( ≤ 0.03) intakes of dry matter (1024 g/d), digestible organic matter (670 g/d), and crude protein (161 g/d) than those on the SS. The NUB provided greater ( < 0.01) dietary water intake (3023 g/d) than TH. The time spent on rumination was shorter ( < 0.01), and the idle time was longer in animals fed NUB and OUB than TH and CS. Microbial protein synthesis was not affected ( = 0.27). The final pH (6.4) of the incubation fluid and the concentration of NH-N (39.05 mg/dL) were greater for NUB and OUB. Ruminal parameters and methane production were little or not affected by tested forages. We recommend using cactus cladodes in combination with sugarcane bagasse and urea/as in sheep diets.
本研究使用体外产气系统评估了给绵羊饲喂不同粗饲料对营养物质和水分摄入、采食行为、氮平衡、微生物蛋白合成、发酵参数及甲烷产生的影响。处理包括五种日粮：仙人球茎（NUB）和（OUB），二者均添加了甘蔗渣（SB）和尿素/硫酸铵（尿素/硫酸铵）；蒂夫顿干草（TH）；玉米青贮（CS）；以及高粱青贮（SS），同样添加了尿素/硫酸铵。与SS相比，NUB的干物质摄入量（1024克/天）、可消化有机物摄入量（670克/天）和粗蛋白摄入量（161克/天）更高（P≤0.03）。与TH相比，NUB的日粮水分摄入量（3023克/天）更高（P<0.01）。与TH和CS相比，采食NUB和OUB的动物反刍时间更短（P<0.01），空闲时间更长。微生物蛋白合成未受影响（P=0.27）。NUB和OUB的培养液最终pH值（6.4）和NH-N浓度（39.05毫克/分升）更高。瘤胃参数和甲烷产生受所测试牧草的影响很小或不受影响。我们建议在绵羊日粮中使用仙人球茎与甘蔗渣和尿素/硫酸铵配合。
