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Effect of nutrients concentration and restricted feeding on the productivity of chicks
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Abstract: Two experiments were conducted to investigate the effect of dietary energy levels with or without 5.0% inclusion of sand in the diet of broiler chicks and to study the effect of feeding systems. i.e. (ad-libitum for 3 to 7 weeks, did for 4, 5 weeks and 5, 6 weeks of age) on the performance and feed efficiency as well as some carcass traits of broiler chicks during growing periods.
Results indicted that, the different energy levels in broiler diets did not affect significantly the performance and feed efficiency and most of the studied carcass traits. Chicks fed the higher energy diet (3000 ME kcal/kg in the starter) consumed more feed significantly (P<0.05). Feeding broiler chicks on the medium energy diets (2850 ME kcal/kg in the starter) improved significantly (P<0.05) the EEU values of broilers during the whole experimental period.
Containing 5.0% sand in the starter and finisher diets affected significantly (P<0.05) the average live body weight, weight gain, feed conversion, and insignificantly the protein efficiency ratio, carcass traits and digestibility coefficient of ether extract and Nitrogen free extract.
Cumulative results showed that, the inclusion of 5.0% sand in the diets with different energy levels insignificantly increased the average live body weights, daily weight gain, feed consumption, feed conversion, protein efficiency ratio, efficiency of energy utilization, digestibility coefficient of CP, EE, CF and some carcass traits of broiler chicks.
Feeding broiler chicks ad-libitum during the finisher period showed insignificant heavier body weight, better values of feed conversion, protein efficiency ratio, efficiency of energy utilization, carcass and dressing weight / 100 g body weight.
Feeding chicks by any feeding system on diet with 5.0% sand showed the insignificant better weight gain, feed consumption, feed conversion and efficiency of energy utilization, while the highest values of PER was observed for chicks fed by restricted feeding system on diet without sand. The lower feed cost/kg gain and higher economical efficiency were obtained when chicks were fed by restricted feeding system on diet containing sand.
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| Publication year |
2002
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| Pages |
216p.
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| Availability location |
مكتبة معهد بحوث الانتاج الحيوانى- شارع نادى الصيد - الدقى - الجيزة
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| Availability number |
783
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| Organization Name |
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| Country |
Egypt
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| Department |
Poultry Nutrition Research Department
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| Author(s) from ARC |
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| Agris Categories |
Animal feeding
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AGROVOC
TERMS |
Broiler chickens.
Carcass composition.
Chicks.
Concentrates.
Energy.
Feeding systems.
Nutrients.
Performance testing.
Productivity.
Restricted feeding.
Sand.
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| Publication Type |
PhD Thesis
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