دراسة تأثير الإصابة التجريبية بالإيميريا ماكسيما و نسب مختلفة من البروتين على أداء إنتاج فروج اللحم

الملخص EN

The present study was carried out at a poultry farm which belongs to the department of Animal Production, College of Agriculture and Veterinary Medicine, Ibb University.

This study was done for 42 days, at January and February, 2006 to study the effect of Coccidia (Eimeria maxima) by giving 50,000 sporulated Oocyst to each bird via the mouth and different levels of protein supplement on the productivity performance of Broiler Chickens, taking 672 commercial Broiler chickens (Ross 308).

One -day old were used in this study, during incubation period all birds were fed on 22% of crude protein, and at the end of 3r week of incubation period the birds were randomly divided into block 1 which was non infected and block 2 infected by Eimeria maxima, each block contained 3 treatments with two frequencies for each treatment, and fed on different levels of crude protein 18, 20, and 22%.

The results showed that, there was highly significant (P<0.01) effect of Eimeria maxima on average of the body weight of infected birds, whereas average body weight was 1752.89 and 1919.55 gm.

for infected and none infected birds respectively.

While average feed intake was highly significant reduced (P<0.01) in infected birds (2325.16 gm./bird) compared with none infected birds (2536.87gm./bird).

Also, the results showed that, there is no significant difference between infected and none infected birds in feed conversion ratio and it was 1.98 and 1.88 kg.

feed /keg.

live weight gain respectively.

For average dressing percentage, there were highly significant (P<0.01) differences between infected and non infected birds and it was 76.89 and 79.22% respectively.

But for Average mortality percentage, Eimeria maxima has no significant effects on mortality percentage and it was 2.38 and 0.89% for infected and non infected birds respectively.