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Effect of dietary supplementation with ground rosemary leaves and their oil extract on local hen performance and lipid oxidation in stored eggs
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Abstract: The main target of this study was to evaluate the effect of adding rosemary leaves and its oil extract as natural antioxidants to developed local strain Inshas chicken diets on productive, reproductive performance and egg yolk cholesterol as well as egg quality during storage. A total number of 168 hens and 21 cocks from developed local strain i'nshas at 34 weeks of age were randomly distributed into 7 groups of 24 hens and 3 cocks each and then subdivided into three replicates (8 hens + 1 cock/ replicate). Each group was fed one of the 7 experimental diets, three levels of rosemary leaves powder (1, 3 and 5% of the diet) in comparison to their oil extracts at 110, 330 and 550 mg / kg diet, respectively), in addition to the basal diet (control). The experimental period continued for 90 days and the experimental diets were formulated to be isonitrogenous (-16% CP) and isocaloric (-2700 Kcal ME / Kg diet). The results of this study showed that adding 1 % rosemary powder (RP) or 110 mg / kg diet rosemary extract (ROE) to Inshas hen diets was enough to improve their productive performance (egg production, egg mass and feed conversion values) and to decrease cost of feed (LE) /kg egg. The improvement in shell thickness (mm) and the reproductive performance of both Inshas hens and cocks required, at least 3% (RP) or 330 mg (ROE) / kg diet. Addition of both (RP) and (ROE) had beneficial healthy effects on blood constitutes, where blood plasma lipids were decreased, while beneficial blood plasma HDL and antibody titter values were improved. In addition, blood plasma malonaldehyde, as an oxidative stress biomarker was decreased, which indicate the protective effect against lipid oxidation Egg yolk content of total cholesterol, L.D.L., total lipids and triglycerides were decreased significantly (P<0.05) as compared with the control due to addition of all (RP) and (ROE) levels. Rosemary leaves powder (RP) at 3 and 5%, while (ROE) at all levels resulted in higher (PSO.OS) egg yolk content of H.D.L. values as compared with the control. The results of treatments on the quality of stored eggs up to 12 days showed that egg .content pH, in general, increased with increasing storage time. Addition of rosemary lowered the pH of egg content than that of the control. Increasing storage time increased egg total bacterial count and coliform group of the hens fed the control diet, while the treatments decreased, numerically, both without significant difference. Egg yolk malonaldehyde increased with increasing storage time, while addition of tested rosemary resulted in less (P<0.05) malonaldehyde than that of the control Based on the results of the experiment, it could be concluded that adding either 1 % rosemary leaves powder or 110 mg/kg diet of rosemary extract to Inshas hen diets improved most of their productive performance and the quality of stored eggs, while at least 3% RP or 330 mg (ROE) / kg diet were required to improve shell thickness (mm) and the, reproductive performance of both Inshas hens and cocks.
Keywords: rosemary, egg, reproduction, hens, cocks)
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| Publication year |
2012
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| Availability location |
معهد بحوث الانتاج الحيواني- شارع نادى الصيد- دقى- جيزة
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| Availability number |
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| Organization Name |
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| Country |
Egypt
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| City |
الاسكندرية
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| serial title |
3rd Mediterranean poultry summit and 6th international poultry conference
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| Author(s) from ARC |
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| External authors (outside ARC) |
شاهيناز احمد حلمى
جامعة القاهرة
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| Agris Categories |
Animal feeding
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AGROVOC
TERMS |
Cocks.
Eggs.
Hens.
Reproduction.
Rosemary.
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| Publication Type |
Conference/Workshop
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