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Article

Multiple Amino Acid Supplementations to Low-Protein Diets: Effect on Performance, Carcass Yield, Meat Quality and Nitrogen Excretion of Finishing Broilers under Hot Climate Conditions

1
Arid Land Agriculture Department, Faculty of Meteorology, Environment and Arid Land Agriculture, King Abdulaziz University, Jeddah 21589, Saudi Arabia
2
Department of Veterinary Medicine and Animal Production, University of Napoli Federico II, via F. Delpino1, 80137 Napoli, Italy
3
Department of Poultry science, University of Georgia, Athens, GA 30602, USA
*
Authors to whom correspondence should be addressed.
Animals 2020, 10(6), 973; https://doi.org/10.3390/ani10060973
Received: 26 March 2020 / Revised: 8 May 2020 / Accepted: 12 May 2020 / Published: 3 June 2020
Crude protein is an essential nutrient in poultry feed. Reducing the use of crude protein not only reduces the feed cost, but also minimizes pollution during poultry production. Thus, finding the minimum protein requirement in broiler diet without compromising broiler growth is the objective in the present study. Supplementing essential amino acids including methionine and lysine to the low-protein diet showed comparable growth performance and carcass yield to the regular protein diet. Thus, reducing the crude protein level is possible if the essential amino acid balance is adequate for broiler growth.
The objective of this study was to evaluate the effect of low-protein diets with amino acid supplementation on growth performance, carcass yield, meat quality and nitrogen excretion of broilers raised under hot climate conditions during the finisher period. In trial 1, broilers from 28 to 49 days of age were fed 18% crude protein (CP) as a positive control or 15% CP supplemented with (1) DL-methionine (Met) + L-lysine (Lys), (2) Met + Lys + L-Arginine (Arg), or (3) Met + Lys + L-Valine (Val). In trial 2, broilers from 30 to 45 days of age, were fed an 18% CP diet as a positive control or 15% CP supplemented with Met, Lys, Arg, Val, L-Isoleucine (Ile) or combination with glycine (Gly) and/or urea as nitrogen sources: (1) Met + Lys, (2) Met + Lys + Arg, (3) Met + Lys + Val, (4) Met + Lys + Ile, (5) Met + Lys + Arg +Val + Ile + Gly, and (6) Met+ Lys + Arg + Val + Ile + Gly + urea. Protein use was improved by feeding low-protein amino acid-supplemented diets as compared to the high-protein diet. Feeding 15% crude protein diet supplemented with only methionine and lysine had no negative effects on carcass yield, CP, total lipids and moisture% of breast meat while decreasing nitrogen excretion by 21%. View Full-Text
Keywords: broilers; amino acid; low crude protein; carcass yield; nitrogen excretion; hot climate broilers; amino acid; low crude protein; carcass yield; nitrogen excretion; hot climate
MDPI and ACS Style

Attia, Y.A.; Bovera, F.; Wang, J.; Al-Harthi, M.A.; Kim, W.K. Multiple Amino Acid Supplementations to Low-Protein Diets: Effect on Performance, Carcass Yield, Meat Quality and Nitrogen Excretion of Finishing Broilers under Hot Climate Conditions. Animals 2020, 10, 973. https://doi.org/10.3390/ani10060973

AMA Style

Attia YA, Bovera F, Wang J, Al-Harthi MA, Kim WK. Multiple Amino Acid Supplementations to Low-Protein Diets: Effect on Performance, Carcass Yield, Meat Quality and Nitrogen Excretion of Finishing Broilers under Hot Climate Conditions. Animals. 2020; 10(6):973. https://doi.org/10.3390/ani10060973

Chicago/Turabian Style

Attia, Youssef A., Fulvia Bovera, Jinquan Wang, Mohammed A. Al-Harthi, and Woo K. Kim. 2020. "Multiple Amino Acid Supplementations to Low-Protein Diets: Effect on Performance, Carcass Yield, Meat Quality and Nitrogen Excretion of Finishing Broilers under Hot Climate Conditions" Animals 10, no. 6: 973. https://doi.org/10.3390/ani10060973

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