تأثير إضافة نسب من الثيرونين في علائق فروح اللحم)‎البادئ، النمو، النهائي)‎ المنخفضة البروتين و نسب من الحامض الأميني)‎الثيرونين)‎ في الأداء الإنتاجي لفروج اللحم و كلفة التغذية

الملخص EN

A total 400 broiler chicks (Ross-308) one day old were randomly for 8 nutritional treatements : percents of protein (standar and decrease the standar protein level by2%) with for levels of threonine (without adding thr, adding thr to complete the requirement, complete the thr requirement 110% and complete the thr requirement 120%.

each treatement included 5 replicates (pens) with bird per each replicate the period of the exiperment was 42 days.

the statistical analyses refered to significant enhance the birds of t5 and t6 for the budy weight and gain and feed conversion ratio compared to the birds of another treatements.

the significant best average for the protein and energy conversion ratio was for the birds of the sixth treatement birds, while the average of thr conversion ratio was significantly (p<0.05) depressed for t8 birds by comparing with another treatment.

the best cost of feed to produce 1 kg live body weight were for the t8 birds.