Abstract
A 320 males Domyati ducklings, 20-day-old were utilized, weighed and partitioned into four empirical groups (five replicates each) to assess the dietary Yucca Schidigera(YS) addition (0.0, 0.15,0.30 and 0.45 g/kg diet) effects on growth characteristics, some blood parameters and economic efficiency during summer season within a complete randomize design. Results cleared the dietary YS addition produced heavier (p 0.05). Abdominal fat (%) was significantly attenuated by dietary YS, but eviscerated carcass and total edible parts (%) were (P< 0.001) better by all YS levels addition than the control. Net return and economic efficiency were improved (P< 0.001) for ducklings fed 0.45 g YS/kg diet than the control at 80 d-old. So, the results signalized that inclusion YS addition with 0.45 g/kg could be maximize and ameliorate the productive performance and carcass traits as well as economic efficiency of males Domyati ducklings throughout growth phase under Egyptian summer conditions.
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