تأثير إضافة أنزيم الفايتيز المايكروبي في العلائق المنخفضة المحتوى من الفسفور المتيسر أو الكالسيوم أو كليهما على الكفاءة الإنتاجية لأمهات فروج اللحم

الملخص EN

This study was conducted at Department of Animal production, Faculty of Agriculture and Forestry, Mosul University from 16/12/2013 to 16/5/2014.

This study had been done to determine the effect of adding Phytase enzyme by 300 g / tone feed in productive traits of broiler breeder Rose strain.

A total of 192 chickens and 32 roosters at the age of 42 weeks.

They were randomly assigned to eight treatments in two replicates for each 12 chickens and 2 roosters in each replicate.

The results of the current study showed that the addition of enzyme to the diets of low calcium, available phosphorus and both of them affected significantly (0.05> P) the egg production (HD%), resulting number of eggs (egg / bird), mass of eggs (g eggs / bird / day) and feed conversion efficiency (kg feed / kg eggs).

While egg weight (g), body weight and percentage of total mortality, was not affected significantly