تأثير استخدام نسب منخفضة من البروتين مع إضافة الأحماض الأمينية الصناعية في علائق البادئ لطائر السمان

الملخص EN

This study was conducted at the poultry farm of animal resources department, college of agriculture and forestry, Mosul university from 4/5 to 15/6/2014.

The study was conducted on 120 day-old quail chicks to investigate the effect of use of low protein starter rations with addition of amino acids premix in drinking water during starter period (0-3 weeks of age) on performance parameters.

The experimental birds were divided into 4 treatments with 3 replicates consist of 10 birds each.

The birds reared in a wooden cage consist of 12 partition (50×50) cm throughout the experiment.

The first treatment was the control and fed on starter ration with 26% crude protein, the second, third and fourth treatments fed on 24, 22, 20 % crude protein, respectively, supplemented with amino acids in drinking water by (0.25 ml/ L).

Energy content in all treatments was 2900 Kcal/Kg ME.

All treatments received one finisher ration containing 24% crude protein and 2900 Kcal/Kg ME during 4-6 weeks of age.

The results showed no significant effect on body weight at 2, 4, 6 weeks, total and daily weight gain during 0-2, 2-4, 4-6, and 0-6 weeks, while there was a significant (P ≤ 0.05) increase in daily and total feed intake of treatment 4 comparing to 3rd during 0-2 week.

There was a significant decrease in feed conversion ratio of treatment 4 comparing to the 2nd and 3rd treatment during 0-2 week.

There was a significant difference (P ≤ 0.05) in daily and total protein consumption during 0-2 week.

The first treatment showed a significant decrease (P ≤ 0.05) in protein conversion ratio comparing to other 3 treatments during 0-2 week, but there was no significant effect of treatments on coefficient of relative growth during the study periods, so it may be possible to use low protein starter ration up to 20% when amino acids added which can reduce nutrition and rearing cost.