Abstract The objective of this experiment was to determine the effects of a phytogenic feed additive on turkey poult performance over a 6-week brooding period. A total of 864 male Hybrid Converter turkey poults were placed into pens that were randomly assigned one of three experimental groups. The three experimental diets included a corn-soy diet with no additives (PC), a similar diet with a 1.5 % reduction in crude protein and key amino acids (NC), and the same NC diet with Digestarom® (PFA) included at a rate of 1 g/kg. Performance-based experimental units (EU) consisted of one pen of 24 poults, with 12 EU per treatment. Mortality were recorded daily, and feed intake (FI), mortality corrected feed efficiency (FE), and body weight gain (BWG) were determined on days 14, 28, and 42. Samples were taken on days 28 and 42 to determine the coefficient of apparent crude protein digestibility (CPD). The expression of genes was determined for selected enzymes and nutrient transporters. The PFA improved poult BWG beyond that of the PC and NC on day 14 (263.7 vs. 252.5 and 252.7 g/bird, respectively; P ≤ 0.05), and there were no differences in FE (P > 0.05). On day 28, BWG was similar among treatments, although the PC had the highest FE (P

中文翻译：

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植物性饲料添加剂对火鸡幼禽性能、营养消化和吸收的评价

摘要 本实验的目的是确定植物性饲料添加剂在 6 周育雏期间对火鸡幼禽性能的影响。将总共​​ 864 只雄性混合转化火鸡幼雏放入围栏，这些围栏被随机分配到三个实验组中的一个。三种实验日粮包括不含添加剂 (PC) 的玉米大豆日粮、粗蛋白和关键氨基酸 (NC) 减少 1.5% 的类似日粮，以及相同的含有 Digestarom® (PFA) 的 NC 日粮1 克/公斤的比率。基于性能的实验单位 (EU) 由一栏 24 只幼禽组成，每次处理 12 EU。每天记录死亡率，并在第 14、28 和 42 天测定采食量 (FI)、死亡率校正饲料效率 (FE) 和体重增加 (BWG)。在第 28 天和第 42 天取样以确定表观粗蛋白消化率 (CPD) 的系数。确定选定酶和营养转运蛋白的基因表达。PFA 在第 14 天将家禽 BWG 提高到超过 PC 和 NC（分别为 263.7 对 252.5 和 252.7 g/只；P ≤ 0.05），并且 FE 没有差异（P > 0.05）。在第 28 天，尽管 PC 的 FE 最高（P