Article
Lalev, Mitko; Hristakieva, Pavlina; Oblakova, Magdalena
Effect of prebiotic feed supplement on the performance and carcass yield of broilers Ross
Source: 
Year published: 2020 y.
Volume: 57, 2
Pages: p. 37-44
Libraries: TUN
Signature:  154

Keywords: broilers





 

 

 

 

 

 
See more about the:
Read full text
 
Description: The study evaluates the effects of the prebiotic ` Actigen ` on the growth and development of ROSS broilers and the possibility to exclude antibiotics during the fattening period. To this end, 4 groups of male broiler chickens were formed: Group T1 - con/style> 0 rH8޳ SjV? (K W?  G S? (KU? SF? M F? S`U? SF?  ? `S? xE? 8޳0#S8޳ IM?  ? &S? ?  ? ? S? vU? 8޳)S8޳MM? ? F? uU? 8޳+S8޳MM?  ?  N? =x+S@QN`{w0rJ? xܳ ? ? `M ( J? xܳ ? ? `I DM? `DM? IryUzG? QN?  J? qJ?  N?  S? S? hrVhrI6Sȹ? ޳? zG? M? S? aI? mJ:S W` W? aI? `S? aI? U? `G ?  ?  ?  ? V? ? 8޳?S8޳N? N? `M? N? @Nr N? 5s ? wE?  fM?  fM? S? ? ? 8tT? ? 8tT?  ? ? 8tT? ? ? 8tT? P? ( J? ? ? ? +LS@qJ? wE? ? ?  ? ? trol group, fed standard feed, but water was supplemented with antibiotic; Group 2 - broilers received nothing but the standard feed, while water was not supplemented with an antibiotic; Group 3 - the feed of broilers was supplemented with a prebiotic ( Actigen ) at 800 g/t in starter, 400 g/t in grower, 200 g/t in finisher, and water was supplemented with an antibiotic; Group 4 - feed of broilers was supplemented with prebiotic ( Actigen ) at 800 g/t in starter, 400 g/t in grower, 200 g/t in finisher, whereas water was not supplemented with an antibiotic. It was found that during the first feeding phase, birds from groups 1, 3 and 4 had a statistically significantly higher weight gain compared to group 2. During the second phase, broilers from group 2 preserved the considerably lower weight gain, whereas during the third stage of feeding, group 3 demonstrated statistically significantly higher weight gain than both groups 1 and 2 ( P < 0.05 ), hence the higher live weight gain of broilers from group 3 by the end of the experiment ( P < 0.05 ). The best FCE ( feed conversion efficiency ) was established in groups 3 - Actigen + antibiotic; 4 - Actigen ( without antibiotic ) - 1.944 kg feed/kg gain and 2.059 kg feed/kg gain respectively. Data for mortality rate during the rearing period showed that no birds from group T4, supplemented with Actigen but not supplemented with an antibiotic, have died. Highest mortality occurred in groups 1 and 2 - 8.7 percent, whereas the mortality rate in group 3 - Actigen + antibiotic was 4.35 percent. Calculated EPEF was highest in group 3 - 299 and 4 - 280. In conclusion, chickens whose feed was supplemented with a prebiotic, had a higher final live weight, showed better feed conversion efficiency and higher European poultry efficiency factor ( EPEF )