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A simple estimation of ideal profile of essential amino acids and metabolizable energy for growing Japanese quail
Author(s) -
Mehri M.,
Ghazaghi M.,
BagherzadehKasmani F.,
Rokouei M.
Publication year - 2016
Publication title -
journal of animal physiology and animal nutrition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.651
H-Index - 56
eISSN - 1439-0396
pISSN - 0931-2439
DOI - 10.1111/jpn.12426
Subject(s) - amino acid , quail , valine , isoleucine , methionine , leucine , tryptophan , lysine , biology , threonine , food science , zoology , biochemistry , serine , endocrinology , enzyme
Summary 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 ( dL ys), methionine ( dM et), total sulphur amino acids ( dTSAA ), threonine ( dT hr), tryptophan ( dT rp), isoleucine ( dI le), valine ( dV al) and arginine ( dA rg) 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: dM et: dL ys = 0.42, dTSAA : dL ys = 0.67, dT hr: dL ys = 0.64, dT rp: dL ys = 0.15, dI le: dL ys = 0.57, dV al: dL ys = 0.79 and dA rg: dL ys = 1.09. The results of this study showed that amino acid requirements of modern quails might be higher than those reported by NRC.