إستخدام تراكيز مختلفة من مستخلص عرق السوس Gllycyrrhiiza gllabra لتحسين الصفات النوعية لبيض دجاج اللومان المربى خلال فترات مختلفة من السنة

الملخص EN

Thiis experiimentt was conductted att tthe poullttry farm,, Collllege of Agriiculltture,, Uniiversiitty of Baghdad tto evalluatte tthe effectt of tthe suppllementtattiion of llayiing hens rattiion wiitth diifferentt llevells of lliicoriice exttractt on egg qualliitty ttraiitts of llayiing hens reared duriing diifferentt periiods of tthe year..

A ttottall of 144 Lohmann hens,, 24 weeks olld were randomlly assiigned for 4 ttreattmentts of 36 hens each..

Each ttreattmentt consttiittuttes of 3 replliicattes wiitth 12 hens each ..

Liicoriice exttractt was suppllementted tto tthe diiett of hens att tthe llevells of 0 (Conttroll group;; C),, 250 mg//Kg of diiett (T1),, 500 mg//Kg of diiett (T2) and 750 mg//Kg of diiett (T3)..

Egg qualliitty charactteriisttiics iinclluded iin tthiis sttudy were:: egg weiightt,, yollk diiametter,, yollk heiightt,, allbumen heiightt,, yollk weiightt,, shellll weiightt,, shellll tthiickness and haugh uniitt..

Resulltts revealled tthatt feediing tthe biirds diiett conttaiins diifferentt llevells of lliicoriice exttractt (T1,, T2,, T3) resulltted iin siigniifiicantt iimprovementt as regards egg weiightt,, yollk diiametter,, yollk heiightt,, allbumen heiightt,, yollk weiightt,, shellll weiightt,, shellll tthiickness and haugh uniitt duriing tthe mostt periiods of tthiis experiimentt and concerniing tthe generall means of tthese ttraiitts..

In concllusiion diiettary suppllementtattiion wiitth 250,, 500 and 750 mg lliicoriice//Kg diiett (T1,, T2 and T3 respecttiivelly) resulltted iin siigniifiicantt amelliiorattiion wiitth rellattiion tto egg qualliitty ttraiitts of egg produced by Lohmann hens reared duriing diifferentt periiodes of tthe year..

Thus,, lliicoriice exttractt can be used as one of tthe iimporttantt nuttriittiive addiittiives tthatt added tto llayiing hens for iimproviing producttiive performance of llayiing hens reared duriing diifferentt montths of tthe year..