مقايسه تاثير چهار نسبت مختلف اسيد آمينه ايده آل بر عملكرد جوجه هاي گوشتي سويه آرين

The Comparison of Four Different Ideal Amino Acid Ratios in Arian Strain Broiler Chicks During Starter Period.

An experiment was conducted to compare four different profiles of AA for Arian broilers in starter period: NRC (1994) IICP (2002), RPAN (1993) feedstuff (2002) this study involved male and female chicks during starter period (1-21) days of age) the ratios of indispensable AA were balances to digestible lysine requirement according to these four profiles, Digestible Lysine for all rations and two sex chicks, set at 1/07 that was for male chicks in starter period. Diets of four profiles were isoenergetic (3200 kcal/kg) and control diet was used according to directive catalog of this strain recommendation. Feed consumption, weight gain, feed conversion ratio and protein efficiency ratio (PER) were measured for each treatment. Results indicated that there was no significant dragnet (P<5%) in feed consumption and weight gain between treatments but the chicks were fed diet formulated by . NRC AA ideal ration have the most weight gain and least feed consumption. FCR by NRC profile was significantly (P<5%) better than the other profiles, but no from RPAN profile, comparison of PER in treatments indicate, the chicks that were fed by IICP profile diets were significant different (P<%5) with other profiles. The positive control diet had worst PER. In addition ; production index of NRC profile significantly was the best one. Results of this experiment suggested that, utilize of digestible AA and ideal AA profile had a better effect on performances in commercial condition and NRC profile was the best pattern to achieve this aim in Arian broilers.