This study aimed to examine the productive and metabolic parameters, carcass and meat characteristics from lambs fed sorghum silages amended with urea and Lactobacillus buchneri. Forty uncastrated male Santa Inês lambs fed with a diet roughage:concentrate ratio of 50:50, and randomly distributed into four groups considering roughage treatments SS - sorghum silage without additive; SSI - sorghum silage with inoculant (Lactobacillus buchneri, 10⁵ cfu/g fresh matter); SSU - sorghum silage with urea [1% of dry matter (DM)]; or SSUI - sorghum silage with urea and inoculant. The experiment were completely randomized design with ten replicates, each animal represented an experimental unit. The intakes of DM (DMI) (P<0.001), as a percentage of BW, DMI %BW (P<0.001), neutral detergent fiber corrected for ash and protein (NDFapI; P=0.005), non-fibrous carbohydrates (NFCI; P<0.001) were lower in SSUI, however, the intake of ethereal extract (EE) did not differ (P=0.076). The highest final body weight (FBW; P<0.001), total weight gain (TWG; P=0.003), and average daily weight gain (ADW; P=0.003) were observed in the groups fed with SSUI. Lambs in feedlot fed with Sorghum Silage amended with urea and Lactobacillus bucnheri promoted higher animal performance with more feed efficiency without negative effects in meat characteristics.

本研究旨在检查用尿素和布氏乳杆菌改良的高粱青贮饲料喂养的羔羊的生产和代谢参数、胴体和肉类特征。40 只未阉割的雄性圣伊内斯羔羊饲喂粗饲料：精料比例为 50:50，并随机分为四组，考虑粗饲料处理 SS - 无添加剂高粱青贮饲料；SSI - 含接种剂的高粱青贮饲料（布氏乳杆菌，10 ⁵ cfu/g 新鲜物质）；SSU - 含尿素的高粱青贮饲料 [1% 的干物质 (DM)]；或 SSUI - 含尿素和接种剂的高粱青贮饲料。实验为完全随机设计，重复十次，每只动物代表一个实验单元。DM（DMI）的摄入量（P<0.001)，作为 BW 的百分比，DMI %BW ( P <0.001)，经灰分和蛋白质校正的中性洗涤纤维 (NDFapI; P = 0.005)，非纤维碳水化合物 (NFCI; P <0.001) 在 SSUI 中较低然而，醚提取物（EE）的摄入量没有差异（P = 0.076）。在喂食 SSUI 的组中观察到最高的最终体重 (FBW; P <0.001)、总增重 (TWG; P = 0.003) 和平均每日增重 (ADW; P = 0.003)。饲养场中的羔羊用高粱青贮饲料添加尿素和布氏乳杆菌，提高了动物的生产性能，饲料效率更高，而且不会对肉类特性产生负面影响。