Growth performance and total tract digestibility in broiler chickens fed different corn hybrids
Melo Duran, Diego Alexander (Universitat Autònoma de Barcelona. Departament de Ciència Animal i dels Aliments)
Pérez Hernández, José Francisco (Universitat Autònoma de Barcelona. Departament de Ciència Animal i dels Aliments)
González-Ortiz, Gemma (AB Vista)
Villagómez Estrada, Sandra (Universitat Autònoma de Barcelona. Servei de Nutrició i Benestar Animal)
Bedford, Michael R (AB Vista)
Graham, H. (AB Vista)
Solà Oriol, David (Universitat Autònoma de Barcelona. Departament de Ciència Animal i dels Aliments)

Data:	2021
Resum:	The aim of the present study was to investigate the variability in nutrient digestibility associated with corn genetic background and its influence on the feeding value for broiler chickens. A total of 960 1-day-old male broiler chicks (Ross 308) were distributed in eight treatments, with 12 pens per treatment and 10 birds per pen in a 42-day study. Eight corn samples (Variety 1 to Variety 8) were selected based on their nutrient composition. A fixed amount of each corn (577 g/kg in the starter diets and 662 g/kg in the finisher diets) was used to formulate feeds. Diets were offered ad libitum in pellet form. Performance parameters were determined at d 21 and d 42, and excreta samples collected at d 21 to determine energy, organic matter and dry matter (DM) whole-tract digestibility. The results revealed a decrease (P < 0. 05) in body weight (BW) and feed intake in birds fed variety 8 compared to other varieties at d 21. The lowest whole tract DM and energy apparent digestibility were also observed for the variety 8 diet (P < 0. 05), together with varieties 3 and 5. Energy digestibility was higher in varieties 2, 4 and 7 (P < 0. 05). Multivariate analysis revealed that corn protein concentration was positively correlated with vitreousness (r = 0. 60, P = 0. 054) and the arabinose:xylose ratio (r = 0. 67, P < 0. 05) and negatively correlated with starch (r = -0. 62, P < 0. 05). Soluble non-starch polysaccharide content was negatively correlated with the protein solubility index (r = -0. 88, P < 0. 05). In addition, corn protein concentration was negatively correlated (P < 0. 05) with 21-d BW (r = -0. 71) and weight gain (r = -0. 62). In conclusion, the corn genetic background influenced the nutrient digestibility and growth performance of broiler chickens. The content and nature of the non-starch polysaccharides were found to be two of the main factors affecting the solubility and availability of nutrients in corn, and could be the reason for the negative effects on the performance of broiler chickens as shown in the present study.
Drets:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades.
Llengua:	Anglès
Document:	Article ; recerca ; Versió publicada
Matèria:	Corn ; Near-infrared spectroscopy ; Total tract digestibility ; Chickens
Publicat a:	Poultry Science, Vol. 100 (april 2021) , ISSN 1525-3171

Adreça alternativa: https://publons.com/publon/49260428/
DOI: 10.1016/j.psj.2021.101218
PMID: 34198097

10 p, 1.4 MB

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