| Titles |
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English :
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Additive effect of virginiamycin on calcium and phosphorus utilization by broiler chickens
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Arabic :
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تأثير إضافة الفيرجينياميسين علي الاستفادة من كل من الكالسيوم والفوسفور بواسطة بداري التسمين
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| Abstract |
Three levels of virginamycen (VIR), 0, 20 and 30 ppm were used in isonitrogeneousThree levels of virginamycen (VIR), 0, 20 and 30 ppm were used in isonitrogeneous isoenergetic starter – finisher diets at a constant Ca: tp ratio (1.14 : 1), to investigate the additive effect of VIR on calcium (0.8%) and phosphorus (0.7%) utilization by Hubbared broiler chickens under Egyptian conditions. A total number of 90 unsexed one week old Hubbard broiler chickens were randomly divided into three treatments. Each treatment involved 30 chicks in three replicates. Growth and feed intake were measured over 7 weeks. Carcass characteristics, bone development, blood. Serum analysis and histopathological examination were also carried out at the termination of the study. The fattening results were economically evaluated in term of net return (NR) and economic efficiency (EE).
The results obtained could be summarized as follows:
1- VIR incorporation to broiler diets up to 30 ppm stimulated both rate and efficiency of gain markedly.
2- The 30 ppm VIR resulted in heaviest birds ( P<0.05) and best feed consumption protein efficiency ratio (FC, PER) and Metabolizable energy utilization (MEU).
3- The 30 ppm VIR supplementation in Hubbared broiler chickens resulted in 17.4, 20.5, 23.2, 19.3 and 2.8% increased in blood, feather, liver, gizzard and dressing weight percentage more than that of unsupplemented one, while the abdominal fat in case of control treatment recorded 10.90% higher than that of 30 ppm VIR group.
4- VIR supplementation (20-30 ppm ) increased the tibia calcium content (0.403 and 0.940%) and tibia phosphorus content (1.4- 2.3%) without changing the ca: tp ratio.
5- Levels of serum GPT and GOT enzymes were increased ( P?0.05) with VIR supplementation (20-30 ppm).
6- There is no pathological effect from VIR supplementation (20-30 ppm ) on kidney and liver tissues of the experimental broiler chickens.
7- VIR supplementation to Hubbard broiler chickens diets not only improve body weight and reduced feed required per unit of body weight but also increase the NR (12.96- 21.6%) and EE ( 12.08- 21.37%) over the control diet, respectively.
Keywords : broiler chicken, virginianycin, calcium, phosphorus, blood, bone development and carcass characteristics.
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| Publication year |
2001
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| Pages |
979-989
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| Availability location |
معهد بحوث الانتاج الحيوانى- شار ع نادى الصيد- الدقى - الجيزة
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| Availability number |
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| Organization Name |
Animal Production Research Institute (APRI)
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| serial title |
Egyption Journal nutrition and feeds
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| Author(s) from ARC |
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| External authors (outside ARC) |
صلاح ابو العلا
جامعة الزقازيق
جمال عبد الرحمن
جامعة الزقازيق
جفناوى منصور حفناوى
وزارة التربية و التعليم
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| Agris Categories |
Animal feeding
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AGROVOC
TERMS |
Blood.
Bones.
Broiler chickens.
Calcium.
Carcass composition.
Phosphorus.
Virginiamycin.
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| Publication Type |
Journal
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