| Titles |
|
English :
|
Improving the utilization of dry fat in broiler diets during summer season
|
|
| Abstract |
The current study was performed in a 9 treatment factorial arrangement to study the associative effect between oil/dry fat source (soybean oil; SO, Polyfat®; PF, or their mixture at the same metabolizable energy contribution for each source; SOPF) and emulsifier source (without, soy lecithin, or Lysoforte Booster®, on the growth performance and meat quality of 432 Ross 308 broiler chicks reared during summer season (28-35°C and 61-68% RH). To provide iso-caloric diets, SO was included at the rate of 3% and 4%, PF at the rate of 3.8% and 5.10%, while SO-PP was incorporated at the rate of 3.4% and 4.5% of the grower and finisher diets, respectively. Soy lecithin at a level of 0.25%, and Lysoforte Booster® at 0.025% were added to the diets. All chicks were fed on the same starter diet up to 10 days of age.
So the experimental treatments were provided at day 11 of age, onwards. Results could be summarized as follows:
-Oil/dry fat sources had no significant effect on total live weight gain, feed intake, dressing %, and sensory traits of the meat. SO-PF gave the best feed conversion ratio (P=0.03), PF recorded the lowest abdominal fat % (P=0.02), while, SO improved the oxidative stability of thigh meat against lipid oxidation (P=0.0001).
-Emulsifier sources had no significant effect on total live weight gain, feed intake, feed conversion ratio, and sensory traits. Emulsifier supplementation had a negative effect on carcass yield as it decreased dressing % (P=0.008) and increased abdominal fat % (P=0.02), but it improved carcass quality, as it ameliorated the antioxidative rancidity of the meat (P=0.0001).
-Interaction between oil/dry fat source and emulsifier source significantly affected total live weight gain (P=0.047), dressing % (P=0.018), and oxidative stability of thigh meat against lipid oxidation (P=0.0001).
So, it is quite recommended to add a combination of soybean oil and dry fat to improve the feed conversion ratio of broiler chicks during grower-finisher diet feeding. While, soybean oil alone is suggested to protect the broiler meat against oxidative rancidity. On the other hand, it is rather recommended to supplement emulsifiers to improve the oxidative stability of the meat than to improve growth performance of broiler chicks grown under summer season conditions.
Key words: Broiler, oil/dry fat, emulsifier, growth performance, meat quality, summer season.
|
| Publication year |
2011
|
| Pages |
C 93
|
| Availability location |
معهد بحوث الانتاج الحيوانى-شارع نادى الصيد- الدقى- الجيزة
|
| Availability number |
|
| Organization Name |
Animal Production Research Institute (APRI)
|
| serial title |
16th European Symposium on the Quality of Eggs and Egg Products - 20th European Symposium on the Quality of Poultry Meat Leipzig, Germany 4-8 September 2011
|
| Author(s) from ARC |
|
| Agris Categories |
Animal feeding
|
AGROVOC
TERMS |
Broiler chickens.
Emulsifiers.
Energy value.
Meat.
Quality.
Seasons.
|
| Proposed Agrovoc |
summer season;growth performance;oil/dry fat;
|
| Publication Type |
Conference/Workshop
|