Effect of dietary cereal type, crude protein and butyrate supplementation on metabolic parameters of broilers

Petrilla, Janka and Mátis, Gábor and Kulcsár, Anna and Talapka, Petra and Bíró, Enikő and Mackei, Máté and Fébel, Hedvig and Neogrády, Zsuzsanna (2018) Effect of dietary cereal type, crude protein and butyrate supplementation on metabolic parameters of broilers. Acta Veterinaria Hungarica, 66 (3). pp. 408-452. ISSN 0236-6290

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Abstract

This study investigates the metabolic effects of maize- or wheat-based diets with normal (NP) and lowered (LP) dietary crude protein level [the latter supplemented with limiting amino acids and sodium (n-)butyrate at 1.5 g/kg diet] at different phases of broiler fattening. Blood samples of Ross 308 broilers were tested at the age of 1, 3 and 6 weeks. Total protein (TP) concentration increased in wheat-based and decreased in LP groups in week 3, while butyrate reduced albumin/TP ratio in week 1. Uric acid level was elevated by wheat-based diet in week 1 and by wheat-based diet and butyrate in week 3, but decreased in LP groups in weeks 3 and 6. Aspartate aminotransferase activity was increased by wheat-based diet in week 3, and creatine kinase activity was intensified by LP in weeks 3 and 6. Blood glucose level decreased in wheat-based groups in week 3; however, triglyceride concentration was augmented in the same groups in week 3. No change of glucagon-like peptide 1, glucose-dependent insulinotropic polypeptide and insulin concentration was observed. In conclusion, an age-dependent responsiveness of broilers to dietary factors was found, dietary cereal type was a potent modulator of metabolism, and a low crude protein diet supplemented with limiting amino acids might have a beneficial impact on the growth of chickens.

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