Effect of different Levels threonine on growth performance, efficiency of carcass and morphology of the small intestine of broilers

Document Type : Research Paper

Authors

1 Associate Professor, Department of Animal Science, Faculty of Agriculture, Kashmar Branch, Islamic Azad University, Kashmar, Iran

2 MSc Graduated of Animal Science, Faculty of Agriculture, Kashmar Branch, Islamic Azad University, Kashmar, Iran

Abstract

The purpose of this experiment was to evaluate the effect of different levels of threonine on growth performance, efficiency of carcass and in broilers.The experiment was done in a completely randomized design arrangement and chicks (Ross 308, 1-d old) were randomly assigned to 4 treatment groups of 4 replicates each including 10 chicks per replicate. Chicks were offered four levels of threonine including: basal diet (without adding threonine), diets containing threonine as recommended by Ross 308 manual guide (level 0/05% threonine + basal diet , level 0/1% threonine + basal diet and level 0/15% threonine+ basal diet at Starter(1-10),Grower(11-24 days) and finisher(25-42 days) periods. The threonine level on daily gain, feed intake and feed conversion ratio were significant effect )P<0/05(.The best Growth Performance of 1-42 day in terms of daily weight gain, feed intake and feed conversion ratio was treatment 0/1% of the threonine and the lowest was the control (non-Thr), respectively. Also, The results of experiment showed that treatment 0/1% of the threonine increased villus height at 42 days (P<0.05). With regard to condition of this experiment, Level of 0/1% of the threonine surplus theronine basal diet improved the Growth performance, Carcass efficancy and morphology of the small intestine of broilers.

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