Abstract：
Botanical extracts (BE; Apex, Adisseo, North America) have demonstrated enhanced DMI and improved gut health, while direct fed microbials (DFM), such as Lactobacillus acidophilus fermentation product (EX: Excell, Pacer Technology, Inc.), has demonstrated improved gut health and growth performance of growing Holstein calves. The hypothesis was this combination may be synergistic to neonatal calf growth performance and intestinal health. Eighty, 2-5-d old Holstein bull calves were blocked by BW and randomly assigned to one of 8 treatments arranged in a 2 × 4 factorial using a randomized complete block design. The main factors were milk replacer (MR) without (Control) and with EX added at 5 g/d fed and calf starter (CS). The CS containing no additives (Control); CS containing BE at 496 mg/kg; CS containing EX at 2.50 g/kg; and CS containing BE and EX at the same inclusion rates. The MR were fed 2x/d at 0630 and 1800 h along with free choice CS (amounts and orts weighed d) and water. Weaning occurred after d 42 for the 56-d experiment. No MR by CS main effects interactions were detected for BW, ADG, CS intake, total DMI, feed efficiency or body frame gain parameters. The BW gain (38.0 and 39.3 kg for control and EX, respectively) for MR main effect was similar for calves fed both MR, while CS main effects (38.7, 39.7, 39.2, and 37.2 kg for control, BE, EX, and BE&EX, respectively) was similar among all CS. Gains in body length (10.6 and 10.8 cm), hip width (4.5 and 4.5 cm), withers height, (10.5 and 10.6 cm) heart girth (18.6 and 19.9 cm) and body length (9.1 and 7.9 cm) were similar for calves fed both MR, while CS main effects for hip height (10.5, 10.2, 10.3, and 10.9 cm), hip width (4.7, 4.6, 4.4, and 4.3 cm) withers height (10.7, 10.9, 10.3 and 10.6 cm), heart girth (19.9, 18.9, 18.9, and 19.4 cm), and body length (11.7, 9.1, 8.3, and 8.4 cm) were similar. Total days of a fecal score = 0 was greater for calves fed Control MR and BE CS compared with calves fed Contol MR and the combination of BE&EX with calves fed the remaining treatments being intermediated and similar. This study demonstrated little calf growth performance and health benefits when feeding a BE or EX alone or in combination compared with calves fed control.
摘要：
植物提取物（BE；Apex，阿迪苏,北美)已经证明了增强的STI和改善的肠道健康，而直接饲喂微生物(DFM)，如嗜酸乳杆菌发酵产品(EX：Excell，起搏器技术,Inc.),已经证明了生长中的荷斯坦牛的肠道健康和生长性能的改善。假设这种组合可能对新生儿小牛生长性能和肠道健康具有协同作用。八十，2-5d的荷斯坦公牛被BW阻断，并使用随机完整的区组设计随机分配给2×4阶乘排列的8种治疗方法之一。主要因素是没有（对照）的牛奶替代品（MR）和以5g/d的速度添加EX和小牛发酵剂（CS）。CS不含添加剂(对照);CS含496mg/kg的BE;CS含2.50g/kg的EX;和CS含BE和EX的含量相同。在0630和1800h时将MR连同自由选择CS(称重d的量和orts)和水一起进料2x/d。56天实验在第42天之后发生断奶。未检测到BW的CS主效应相互作用的MR，ADG,CS进气,总MDI,进给效率或车身框架增益参数。BW增益（控制和EX为38.0和39.3kg，分别)对于两种MR喂养的小牛的MR主要效果相似，而CS主要效应(对照组为38.7、39.7、39.2和37.2kg，BE,EX,和BE&EX，分别)在所有CS中相似。身体长度的增益（10.6和10.8厘米），臀部宽度（4.5和4.5厘米），枯萎的高度，（10.5和10.6厘米）的心围（18.6和19.9厘米）和体长（9.1和7.9厘米）相似，而CS主要影响臀高（10.5、10.2、10.3和10.9cm），臀部宽度（4.7、4.6、4.4和4.3厘米）枯萎高度（10.7、10.9、10.3和10.6厘米），心围（19.9，18.9，18.9和19.4厘米），体长（11.7、9.1、8.3和8.4cm）相似。饲喂对照MR和BECS的小牛的粪便评分=0的总天数比饲喂ContolMR的小牛和BE＆EX与饲喂其余治疗的小牛的组合更长。与饲喂对照的小牛相比，这项研究表明，单独或联合饲喂BE或EX时，小牛的生长性能和健康益处很小。
