Effect Of Repeated Use Of Ivermectin On Growth Ouled Djellal Lambs Raised With Concentrate Barley

The aim of this work is to evaluate the influence of repeated injection of ivermectin on growth performance of Ouled Djellal lambs aged 7 months (214 ±3.72 days) and feeding with barley as concentrate feed. This experiment was taken place between july and august 2014 in Guelma municipal region of East Algeria- .However, 40 males were equally divided into two homogeneous groups (control and experimental) weighing respectively 35.8±1.54 and 35.6±1.47 Kg (P>0.05). The two considered groups received the first injection of ivermectin at 30 days of age and the experiment group was given a second injection of the same product at J0 day. Therefore, all animals were conducted in the same manner, during this experiment. These diet consists to distribute straw wheat with a limited amount, and barley concentrate (60 % of barley, + 30 % of bran), distributed like water ad libitum. The injection of ivermectin one month after the first treatment, had no effect on zootechnical and economics performance traits of Ouled Djellal lambs (P>0.05). Related an average daily gain product (about of 200g/d), is comparable to those of other breeds, raised on barley and meals (soybean, sunflower, colza). It is the consequence probably of a single injection of ivermectin, especially combined with feed presented ad libitum to the trough, contain mainly a barley concentrate.