Digestible lysine requirement of broilers based on practical diet
作者： Ali Mahdavi , Mahmoud Shivazad , Fatemeh Alemi , Mojtaba Zaghari , Hossein Moravej
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摘要: The aim of this study was to estimate the requirement for digestible lysine broilers from 35 49 days age. Two hundred and forty chicks with a mean weight 44±1 g were used in completely randomized design, made up male female 6 levels. Experimental diets formulated be isoenergetic isonitrogenous. Fitted broken lines on different responses indicated break points at 0.93, 0.93 (for body weight), 0.98, 0.92 feed conversion ratio female, respectively. results showed that maximum breast yield percentage, plasma free antibody titer against Newcastle disease virus exceeded range levels tested. Dietary had significant effect increasing lysine, albumin, total protein, immunoglobulin, sheep red blood cell, heterophil lymphocyte ratio. In conclusion, requirements performance lower than percentage immune responses. Broken-line analysis concentrations useful physiological indicators determining broilers. Our suggest estimated based exponential response curves higher obtained using broken-line model.
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