الخلاصة

This study was conducted at the poultry farm , Animal Resource of Department, College of Agriculture ,the university of Babylon during the period from 14th of July to 18th August 2011 . The experiment aimd to investigate the effect of compound Lovit supplemente with drinking water to alleviate the negative effects of heat stress through study of some productive traits of broiler chickens were being exposed to daily stress of acyclic temperature .(28-38c) Three hundred unsexed on day old chick Ross , average weight 40g/chick . The chicks were reared on a ground throughout two stage : The first stage from one – day old to 14 day old with no treatment whereas second stage was from 15 to 35 days of age . They were randomly allocated 4 treatments groups , each comprising 3 replicates of 20 chicks . The treatment containing four lovit at 0 , 1 , 2 and 3 ml/L water T1 , T2 , T3 and T4 respectively . Birds reared under cyclic high temperature 28 – 38 – 28 c° and relative humidity average 60-70% . The most important result can be summarize . 1- Birds in T4 have a higher (p < 0.05) body Wight means at 5 weeks of age , and total weight gain means during the period (3-5) weeks of age compared with other treatment . 2- During the period (3-5) weeks of age , feed in take for T4 was a higher (p < 0.05) compared with other treatment studied . 3- During the period (3-5) weeks of age , feed conversion efficiency values ration where significantly (p < 0.05) improved in all treatments as compared with T1 . 4- A significant (p < 0.05) increase in dressing percentage in T3 and T4 as compared with T1 and T2.