| Titles |
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English :
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The optimal calcium and phosphorus ratio required for broiler chickens under Egyptian condition
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Arabic :
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الاحتياجات المثلي لكتاكيت بداري التسمين لنسبة الكالسيوم إلى الفوسفور تحت الظروف المصرية
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| Abstract |
Three levels of dietary calcium 0.8, 1.1 and 1.4% were used in isonitrogen starter- finisher diet at a constant phosphorus level (0.7% ) to give 1.14, 1.57 and 2: 1 Ca: tP ratios, to investigate the optimal Ca: 1P ratio required for broiler chickens under Egyptian conditions. Ninety unsexed Hubbared broiler chickens one week old were randomly divided into three treatments (each 30 chicks in three replicates). Growth and feed intake were measured over 7 weeks. Carcass characteristics, bone development, blood 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 and economic efficiency. Results could be summarized as follows:
The preferable Ca: tP ratio for broiler chickens was 1.57: 1. Narrowing the Ca:tP ratio from 1.57: 1 to 1.14 : 1 or widening it to 2:1 decreased body weight gain and feed conversion values. No significant among rations with different levels of calcium (0.8 , 1.1 and 1.4% ) at a constant phosphorous level (0.7) on carcass component. The best bone development for Hubbared broiler chickens (1- 7weeks of age ) achieved at 1.1% Ca and 0.7% Tp (1.57: 1Ca :tP ratio ). Levels of serum Glutamic pyruvic transaminase and Glutamic oxalo acetic transaminase were increased (P<0.05) with increasing Ca: t P ratio. There is no pathological effect due to Ca: t P ratio on kidney and liver tissues of the experimental broiler chickens. Net return and economic efficiency values increased from low Ca : t P ratio (1.14: 1) to the medium one ( 1.57: 1), but not by widening, Ca : t P ratio to 2 : 1.
From nutritional point of view, bone development, carcass characteristics and economical efficiency, the present experimental results suggest that Ca and t P levels ( 1.1% & and 0.7% resp.) with 1.57: 1 Ca :t P ratio is sufficient for Hubbard broiler chickens under Egyptian conditions.
Keywords: Calcium, phosphorus, carcass, bone, blood serum, net return, economic efficiency, broilers.
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| Publication year |
2001
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| Availability location |
معهد بحوث الانتاج الحيوانى- شارع 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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| City |
قناة السويس
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| serial title |
Second International Conference On Animal Production& Health in Semi Arid Areas Suez Canal University
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| Author(s) from ARC |
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| External authors (outside ARC) |
صلاح الدين ابو العلا
جامعة الزقازيق
جمال الدين عبد الرحمن
جامعة الزقازيق
حفناوى منصور
وزارة التربية و التعليم
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| Agris Categories |
Animal feeding
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AGROVOC
TERMS |
Blood serum.
Bones.
Broiler chickens.
Calcium.
Carcass composition.
Egypt.
Phosphorus.
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| Proposed Agrovoc |
economic efficiency;net return;
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| Publication Type |
Conference/Workshop
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