Crude protein reduction and digestible methionine+cystine and threonine to digestible lysine ratios in diets for Nile tilapia fingerlings
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چکیده
منابع مشابه
Estimation of the Optimal Ratio of Standardized Ileal Digestible Threonine to Lysine for Finishing Barrows Fed Low Crude Protein Diets
Two experiments were conducted to determine the standardized ileal digestible (SID) lysine (Lys) requirement and the ideal SID threonine (Thr) to Lys ratio for finishing barrows. In Exp. 1, 120 barrows with an average body weight of 72.8±3.6 kg were allotted to one of six dietary treatments in a randomized complete block design conducted for 35 d. Each diet was fed to five pens of pigs containi...
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There have been relatively few lysine requirement studies that have covered the full productive life of commercial toms (0 to 20 wk). Lysine is the reference amino acid for Ideal Protein ratios and accurately defining the requirement reduces fractional errors in the corresponding ideal protein ratios. A series of studies were conduct to determine the lysine concentrations (total and digestible)...
متن کاملStandardized ileal digestible tryptophan-to-lysine ratios in growing pigs fed corn-based and non-corn-based diets.
Two 21-d experiments were conducted to determine the optimum standardized ileal digestible (SID) Trp:Lys in growing pigs fed corn-based diets compared with non-corn-based diets. The primary response variables in both experiments were ADG and plasma urea N (PUN) concentrations with the optimum SID Trp:Lys determined using broken-line analysis. Experiment 1 evaluated the optimum SID Trp:Lys in gr...
متن کاملThe Optimal True Ileal Digestible Lysine and Threonine Requirement for Nursery Pigs
A total of 360 pigs (initially 22.2 lb and 31 d of age) was used in a 21-d growth assay. This trial was conducted as a combination of two separate trials in order to simultaneously examine both the true ileal digestible lysine and true ileal digestible threonine requirement and determine the appropriate threonine:lysine ratio. The first part of the trial consisted of five treatments with increa...
متن کاملThe Effect of Formulation Diets Based on Digestible Amino Acids and Lysine Levels on Carcass and Chemical Composition of Broiler
This study was conducted to evaluate the carcass yield, abdominal fat deposition and chemical compositions of thigh and breast muscles of male Arian broilers fed three different lysine levels of 1) high lysine (110% NRC), 2) standard level suggested by National Research Council (NRC) and 3) low lysine (90% NRC) based on two expression ways of amino acid contents of feedstuffs, as total amino ac...
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ژورنال
عنوان ژورنال: Revista Brasileira de Zootecnia
سال: 2009
ISSN: 1516-3598
DOI: 10.1590/s1516-35982009000800002