title: A simple estimation of ideal profile of essential amino acids and metabolizable energy for growing Japanese quail.
abstract: An experiment was conducted to determine apparent metabolizable energy (AME) and amino acid requirements of growing Japanese quail based on ideal protein concept using artificial neural network and desirability function (D-ANN). Seven-day-old quail chicks were assigned to nine experimental diets based on central composite design (CCD) containing five levels of AME (2809-3091 kcal/kg) and CP (19-24.8% of diet). The ratio of lysine (Lys) to CP was set at 0.053 among all treatments, and remaining essential amino acids (EAA) were adjusted to Lys. The experimental data of CCD were fitted to D-ANN model to compute the optimal values for independent variables. The optimal values of inputs including AME, CP, digestible Lys (dLys), methionine (dMet), total sulphur amino acids (dTSAA), threonine (dThr), tryptophan (dTrp), isoleucine (dIle), valine (dVal) and arginine (dArg) for maximizing gain and minimizing feed conversion ratio were estimated at 2865 kcal/kg, 25, 1.32, 0.55, 0.88, 0.84, 0.20, 0.75, 1.04 and 1.45% of diet, respectively, with D (desirability function) = 0.94. The corresponding optimal amounts of amino acids based on total amino acids were 1.42, 0.59, 0.95, 0.90, 0.22, 0.81, 1.12 and 1.56% of diet respectively. The ideal pattern of essential amino acids to Lys was as follows: dMet: dLys = 0.42, dTSAA: dLys = 0.67, dThr: dLys = 0.64, dTrp: dLys = 0.15, dIle: dLys = 0.57, dVal: dLys = 0.79 and dArg: dLys = 1.09. The results of this study showed that amino acid requirements of modern quails might be higher than those reported by NRC.
authors.affiliation: Department of Animal Science, College of Agriculture, University of Zabol, Zabol, Iran.
authors.forename: M
authors.identifier: http://orcid.org/0000-0001-8202-8565
authors.initials: M
authors.lastname: Mehri
authors.affiliation: Department of Special Domestic Animals, Research Institute at University of Zabol (RIUOZ), University of Zabol, Zabol, Iran.
authors.forename: M
authors.initials: M
authors.lastname: Ghazaghi
authors.affiliation: Department of Animal Science, College of Agriculture, University of Zabol, Zabol, Iran.
authors.forename: F
authors.initials: F
authors.lastname: Bagherzadeh-Kasmani
authors.affiliation: Department of Animal Science, College of Agriculture, University of Zabol, Zabol, Iran.
authors.forename: M
authors.initials: M
authors.lastname: Rokouei
mesh_terms: D000601:Amino Acids, Essential / Q000008:administration & dosage*; D000821:Animal Feed / Q000032:analysis*; D000824:Animal Nutritional Physiological Phenomena; D000818:Animals; D003370:Coturnix / Q000254:growth & development / Q000502:physiology*; D004032:Diet / Q000662:veterinary; D004044:Dietary Proteins / Q000008:administration & dosage*; D002149:Energy Intake / Q000502:physiology*; D008954:Models, Biological; D009751:Nutritional Requirements
chemical_list: D000601:Amino Acids, Essential; D004044:Dietary Proteins
keywords: artificial neural networks; desirability function; nutritional requirements; quail chick