The interaction between inclusion of fibrous ingredients and bird type on the coefficient of apparent ileal digestibility (CAID) of nutrients and energy utilization was investigated in the current study. A 2 × 3 factorial arrangement of treatments was utilized with 2 fiber contents (10.3 and 19.3 g/kg neutral detergent fiber) and 3 bird types (broilers, pullets and layers). The low-fiber diet was based on corn and soybean meal, and the high-fiber diet was developed by the inclusion of palm kernel meal, canola meal, and oat hulls. Titanium dioxide was used as an inert marker to calculate the CAID. The digesta were collected from the terminal ileum following the feeding of experimental diets for 7 d. Significant interactions (P < 0.05) between dietary fiber content and bird type were observed for the CAID of DM, starch, fat, neutral detergent fiber and energy, and AMEn. In general, the CAID coefficients were higher in broilers, intermediate in pullets, and lowest in layers at both fiber contents. The CAID of nutrients in the 3 bird types was higher (P < 0.05) in the high-fiber diet than in the low-fiber diet, but the magnitude of responses differed. Layers showed markedly higher digestibility responses to increased dietary fiber content compared to broilers and pullets. There were interactions (P < 0.05 to 0.001) between the dietary fiber content and bird type for the CAID of nitrogen and all amino acids, except for Asp and Lys. The CAID of Asp and Lys was highest (P < 0.05) in broilers, intermediate in pullets, and lowest digestibility in layers. The CAID coefficients of nitrogen and amino acid increased with increased fiber content, with distinctly greater responses in layers compared to broilers and pullets. Overall, layers showed greater digestibility of nutrients in response to the increased fiber content, suggesting that layers require high-dietary fiber contents to efficiently utilize nutrients compared to broilers and pullets.

中文翻译：

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膳食纤维成分和家禽类型影响营养物质的表观回肠消化率和能量利用。

在当前的研究中，研究了纤维成分和家禽类型对养分的表观回肠消化率 (CAID) 和能量利用之间的相互作用。采用 2 × 3 因子排列的处理方法，其中 2 种纤维含量（10.3 和 19.3 g/kg 中性洗涤纤维）和 3 种禽类（肉鸡、小母鸡和蛋鸡）。低纤维日粮以玉米和豆粕为基础，而高纤维日粮则通过添加棕榈仁粕、菜籽粕和燕麦壳而发展起来。使用二氧化钛作为惰性标记物来计算 CAID。在饲喂实验饲料 7 天后，从回肠末端收集食糜。DM、淀粉、脂肪、中性洗涤纤维和能量，以及AMEn。一般来说，在两种纤维含量下，CAID 系数在肉鸡中较高，在小母鸡中居中，在蛋鸡中最低。3种禽类营养素的CAID在高纤维饮食中高于低纤维饮食（P < 0.05），但反应幅度不同。与肉鸡和小母鸡相比，蛋鸡对增加的膳食纤维含量表现出明显更高的消化率反应。除 Asp 和 Lys 外，除 Asp 和 Lys 外，膳食纤维含量和家禽类型对于氮和所有氨基酸的 CAID 存在交互作用（P < 0.05 至 0.001）。Asp和Lys的CAID在肉鸡中最高（P < 0.05），在小母鸡中居中，在蛋鸡中消化率最低。氮和氨基酸的CAID系数随着纤维含量的增加而增加，与肉鸡和小母鸡相比，蛋鸡的反应明显更大。总体而言，随着纤维含量的增加，蛋鸡对养分的消化率更高，这表明与肉鸡和小母鸡相比，蛋鸡需要高膳食纤维含量才能有效利用养分。