| Titles |
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English :
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Effect of replacing yellow corn with different levels of some untraditional energy sources in rations on laying hens performance
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Arabic :
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تأثير احلال الذرة الصفراء بنسب مختلفة من بعض المصادر الغير تقليدية للطاقة في العلائق على الاداء الانتاجى للدجاج البياض
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| Abstract |
A total of 270 Mamoura chickens (243 hens and 27 cocks) of 24 weeks old were randomly divided into 9 triplicate groups (10 birds X 3 replicats X 9 treats). The replicate contains one cock and nine hens. They were reared in conventional floor brooder houses and fed the experimental diets for 24 weeks experimental period. Nine experimental diets were formulated in which the first (Tl) contained yellow corn (YC) and soybean meal (SBM) as the main sources of energy and protein, respectively. In the other diets YC in Tl was replaced by either sorghum grains (SG) or cassava root meal (CRM) at substitution levels of 25 % (T2 and T6, respectively), 50 % (T3 and T7, respectively), 75% (T4 and T8, respectively) and 100% (T5 and T9, respectively). All diets were adjusted to be iso-nitrogenous of about 16 % CP and iso-caloric of a bout 2800 Kcal ME/Kg. Laying hen performance, egg quality, fertility and hatchability were measured. A metabolism trial was also carried out to determine the nutrient digestibilities and metabolizabilities of the experimental diets.
The obtained results showed that, there were no significant differences between the control group and those of 25 and 50 % substitution levels of either SG or CRM for YC in live body weight, weight gain, egg production, feed conversion, fertility, hatchability and economic efficiency which significantly surpassed those of 75 and 100 % replacement. No significant differences were found among all treatments in egg weight, feed intake and measurements of egg quality except yolk colour which' gradually decreased with the increase in substitution level of SG or CRM.
Birds fed on the control diet and those fed on 25 and 50 % substitution levels of SG or CRM on the expense of YC resulted in significant better digestibility and metabolizability values than those on 75 and 100 % substitution levels. With the exception of some significant differences in concentration of plasma calcium and phosphorus, no significant differences were detected among all dietary treatments in concentration of plasma total protein, total lipids, glucose and cholestrol or in that of blood hemoglobin and also in hematocrit value.
In conclusion, when the performance of laying hens are put into consideration in addition to the economic efficiency, it appears that, either SG or CRM can be incorporated in layer diets at a substitution level up to 50% for YC without any deleterious effects. This is of great benefits specially in case of yellow corn storage.
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| Publication year |
2005
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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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| serial title |
Egyptian Journal Agricultural Research
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| ISSN |
1110-6336
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| Author(s) from ARC |
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| External authors (outside ARC) |
عبد البصير حمزة ريا
جامعة المنصورة
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| Agris Categories |
Animal feeding
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AGROVOC
TERMS |
Egg hatchability.
Fertility.
Layer chickens.
Maize.
Sorghum.
Soybean meal.
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| Proposed Agrovoc |
laying hens performance;cassava root meal;egg quality;nutrient digestibilitie;
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| Publication Type |
Journal
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