Effects of dietary energy level and guanidinoacetic acid supplementation on growth performance, carcass quality and intestinal architecture of broilers

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CEYLAN N., Koca S., Adabi S. G., Kahraman N., Bhaya M. N., BOZKURT M. F.

CZECH JOURNAL OF ANIMAL SCIENCE, cilt.66, sa.7, ss.281-291, 2021 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 66 Sayı: 7
  • Basım Tarihi: 2021
  • Doi Numarası: 10.17221/11/2021-cjas
  • Dergi Adı: CZECH JOURNAL OF ANIMAL SCIENCE
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Agricultural & Environmental Science Database, Aquatic Science & Fisheries Abstracts (ASFA), BIOSIS, CAB Abstracts, Food Science & Technology Abstracts, Veterinary Science Database, Directory of Open Access Journals
  • Sayfa Sayıları: ss.281-291
  • Anahtar Kelimeler: broiler, creatine, energy utilisation, jejenum morphologhy, breast meat, MEAT QUALITY, MORPHOLOGY, IMMUNITY, ARGININE, TRAITS
  • Ankara Üniversitesi Adresli: Evet

Özet

Energy, known as the most expensive nutrient in broiler feed, is what strongly adjusts and affects the growth of broilers. Creatine has a key role in cellular energy metabolism and could be synthesised from guanidinoacetic acid (GAA) in the liver; however, its de novo synthesis is not able to adequately fulfil the demand of energy metabolism, especially in fast-growing modern broilers. So the aim of the study was to evaluate the efficiency of commercial GAA in energy-reduced broiler diets on performance and intestinal development. Overall, 11 400 day-old Ross 308 chicks were randomly allocated to six dietary treatments with ten replicates in each. Dietary treatments were designed as a 3 x 2 factorial arrangement with three levels of dietary metabolisable energy (AME(n)) recommended by Aviagen for Ross 308 broilers (12.55 MJ/kg, 12.97 MJ/kg and 13.38 MJ/kg for starter, grower and finisher, respectively), 0.209 MJ/kg and 0.418 MJ/kg reduced and two levels of GAA (0.00% and 0.06%). There was no significant GAA x AME(n) interaction for all performance parameters, carcass traits and jejunal morphological parameters (except for the villus width). Reduction of dietary AME(n) (0.209 MJ/kg and/or 0.418 MJ/kg) caused a significant depression in body weight (BW) gain (P < 0.001) and feed conversion ratio (FCR) (P < 0.001). However, a decreasing AME(n )level increased villus height (P < 0.003) and villus surface area (P < 0.03), while crypt depth and villus width were similar. The GAA improved final BW and FCR by 1.77% and 1.66%, respectively (P < 0.001). Birds fed low energy diets supplemented with GAA showed a significant improvement in the performance so that BW and FCR were the same as in the control birds; however, no such positive effects were obtained in jejunal villus development. Hence, it might be concluded that 0.06% GAA supplementation improves BW and FCR and can save at least 0.209 MJ/kg dietary AME(n) in broiler diets.