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<p>This study evaluated the effects of neutral detergent fiber (NDF) source and inclusion level on the performance, gut microbiota, and meat quality of slow-growing broilers. A total of 400 Naked Neck chicks were distributed across two experiments: initial (1–28 d) and growth/finishing (29–70 d). Birds were fed a control diet (CD) or diets containing an additional 3% or 6% NDF from wheat bran (WB) or guava residue (GR), resulting in the following treatments: CD, WB3%, WB6%, GR3%, and GR6%. In Experiment 1, birds fed WB3% and GR6% diets showed significantly lower body weight (BW) and weight gain (WG) compared to those fed CD (<i>P</i> &lt; 0.05). Feed conversion ratio (FCR) was significantly higher (worse) in birds fed WB3%, WB6%, and GR6% diets relative to CD (<i>P</i> &lt; 0.05), while no significant difference was observed between GR3% and CD (<i>P</i> &gt; 0.05). Feed intake did not differ among treatments (<i>P</i> &gt; 0.05). A significant interaction between NDF source and inclusion level was detected for BW, WG, and FCR (<i>P</i> &lt; 0.05). In Experiment 2, no significant differences in performance traits were observed between CD and NDF-supplemented diets (<i>P</i> &gt; 0.05). Carcass and meat cut yields were not affected by dietary treatments (<i>P</i> &gt; 0.05). However, relative liver weight was significantly higher in birds fed guava residue-based diets (<i>P</i> &lt; 0.05). Regarding sensory attributes, the GR6% diet promoted significantly higher scores for appearance and color (<i>P</i> &lt; 0.05) and received the highest consumer preference. Microbiological analyses, although based on pooled samples, indicated a numerical trend toward lower thermotolerant coliform counts in NDF-supplemented groups. In conclusion, although NDF supplementation did not improve growth performance, the inclusion of 6% NDF from guava residue enhanced meat color and consumer preference, highlighting its potential as a functional ingredient for slow-growing broilers.</p>

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Fiber inclusion strategies in broiler diets: effects on performance, modulation of gut microbiota and sensory properties of meat

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年4月3日

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  • Margarida Jorge Farias,
  • Cláudia Goulart de Abreu,
  • Silvana Cavalcante Bastos Leite,
  • Ana Sancha Malveira Batista,
  • Daiane Félix Santiago Mesquita,
  • Janete Gouveia de Souza,
  • Raquel Oliveira dos Santos Fontenelle,
  • Felipe Dilelis,
  • Robson Mateus Freitas Silveira

摘要

This study evaluated the effects of neutral detergent fiber (NDF) source and inclusion level on the performance, gut microbiota, and meat quality of slow-growing broilers. A total of 400 Naked Neck chicks were distributed across two experiments: initial (1–28 d) and growth/finishing (29–70 d). Birds were fed a control diet (CD) or diets containing an additional 3% or 6% NDF from wheat bran (WB) or guava residue (GR), resulting in the following treatments: CD, WB3%, WB6%, GR3%, and GR6%. In Experiment 1, birds fed WB3% and GR6% diets showed significantly lower body weight (BW) and weight gain (WG) compared to those fed CD (P < 0.05). Feed conversion ratio (FCR) was significantly higher (worse) in birds fed WB3%, WB6%, and GR6% diets relative to CD (P < 0.05), while no significant difference was observed between GR3% and CD (P > 0.05). Feed intake did not differ among treatments (P > 0.05). A significant interaction between NDF source and inclusion level was detected for BW, WG, and FCR (P < 0.05). In Experiment 2, no significant differences in performance traits were observed between CD and NDF-supplemented diets (P > 0.05). Carcass and meat cut yields were not affected by dietary treatments (P > 0.05). However, relative liver weight was significantly higher in birds fed guava residue-based diets (P < 0.05). Regarding sensory attributes, the GR6% diet promoted significantly higher scores for appearance and color (P < 0.05) and received the highest consumer preference. Microbiological analyses, although based on pooled samples, indicated a numerical trend toward lower thermotolerant coliform counts in NDF-supplemented groups. In conclusion, although NDF supplementation did not improve growth performance, the inclusion of 6% NDF from guava residue enhanced meat color and consumer preference, highlighting its potential as a functional ingredient for slow-growing broilers.