إضافة الزعتر والحبة السوداء إلى علايق الدجاج اللاحم وتأثيرهما على كفاءة النمو وصفات الذبيحة وبعض قياسات الدم

الملخص EN

An experiment was carried out to study the effect of addition of thyme and black cumin seed to broiler diet and their effects on growth performance, carcass traits and some blood measurements.

a total of 240 broiler chicks (ross) unsexed (1 d of age) were divided into four treatments and each treatment (t) consisted of 6 replicates of 10 birds each.

thyme and black cumin (powder) were added to the basic diet consisting of maize, soybean meal and protein concentrate (broiler concentrate) to form the experimental dietary treatments as follows: T1 without addition, T2 with 1% of the thyme powder, T3 with 1% of the black cumin powder and T4 with 1% of thyme and 1% of black cumin.

the results from this experiment showed no significant (p ˃ 0.05) effect by adding thyme and black cumin separately or together on the growth performance for the starter (1-21 d of age), grower (22-42 d of age) or entire period (1-42 d of age).

an exception that the T4 showed significantly (p < 0.05) higher body weight and body weight gain, as well as a significant (p < 0.05) improvement of the feed conversion ratio compared to the T2 in starter (1-21 d of age).

there was no significant effect of thyme or black cumin on dressing percentage, on breast meat weight and thigh (in %) and on the percent of heart, liver and gizzard.

on the other hand, the addition of thyme and black cumin reduced significantly the weight of spleen comparing to control treatment.

the addition of the black cumin (1%) showed a significant reduction in blood cholesterol concentration compared to control treatment.

in conclusion, there is a slight improvement in the growth performance and carcass of broiler chickens by adding thyme and black cumin in this study.