Effect of high protein DDGs uses on productive performance, physiological and immunological traits of broiler

الملخص EN

An experiment was conducted to evaluate the uses of different levels of golden colored high protein corn distillers dried grains with soluble (Hp-DDGS) in broiler diets throughout 42d.

This study included (0, 2.5, 5.0, 7.5) % in the treatments T0, T1, T2 and T3 HP-DDGS successively.

A total of 600 chicks of a commercial broiler strain Ross-308 were randomly distribute to three replicate in each treatment.

At the end of the study five representative birds per replicates in each treatment were processed to determine physiological and immunological characteristics.

The results showed that use of HP-DDGS in broilers diet is presented significantly increase (P<0.05) in performance traits: body weight and body weight gain, the percentage weight of: dressing, carcass cuts (breast, thigh and drumstick) and internal organs (liver, proventriculus, heart and gizzard) at 42 days in the treatments T2 and T3 as compared to the T1 and the control (T0).

FCR differed significantly (P<0.05) among treatments, better feed conversion was found in T3, T2 and T1, respectively as compared to T0 at 42 days.

But, the results showed significantly decrease (P<0.05) in mortality, neck and back percentages at the end of the experiment in T3 and T2 as compared to T1 and T0, while, there were non-significant differences among all treatments in feed consumption and wings weight percentage.

The results also showed a significant increase (P<0.05) in total count of red blood cells (RBCs), hemoglobin (Hb), packed cell volume (PCV), total protein, globulin concentration and high density lipoprotein (HDL) in the treatments T3 and T2 as compared to T1 and control (T0), while, shown significant reduction (p<0.05) in H/L ratio and albumin, total cholesterol and low density lipoprotein (LDL) concentration in blood serum in the treatments T1, T2 and T3 as compared to T0.

The immunological traits also shown high significant increase (p<0.05) in the antibodies titer of Newcastle disease (ND), Gumboro disease (IBD) and Infectious Bronchitis Viral (IBV), the ileum of small intestine histology also shown high significant increase (P<0.05) in Villi height (μm), crypt depth (μm) and V/C ratio in the treatments T3 then T2 compared to the control T0 at the age 42.

These results indicated that HP DDGS could be used at the level of 7.5% in broiler diets by its significant effect on productive performance, physiological and immunological traits.