RESPONSE OF LAYING JAPANESE QUAIL TO DIFFERENT LEVELS OF PROTEIN WITH OR WITHOUT VITAMIN E AND SELENIUM SUPPLEMENTATION | ||||
| Journal of Animal and Poultry Production | ||||
| Article 1, Volume 32, Issue 9, September 2007, Page 7133-7151 PDF (835.79 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jappmu.2007.220585 | ||||
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| Authors | ||||
| k. Abd El- Galil,; Henda A. Mahmoud; K. M. Abu El-Soud | ||||
| Animal and Poultry Nutr., Dept., Desert Research Center, El-Matareya, Cairo, Egypt. | ||||
| Abstract | ||||
| A total number of 270 Japanese quail (180 females and 90 males) at 4 weeks of age were used in an experiment lasted 22 weeks. Experimental japanese quail (Coturnix coturnix japonica), were used in a 3x2 factorial arrangement. Quail were randomly divided into three treatment groups, each of 60 quail females and 30 males, that received three dietary protein levels (16, 18 or 20 % CP). Each quail group was randomly divided into two sub-groups (30 females and 15 males each). The first sub-group of each group received diet without any supplementation, while the second sub-group was given diets supplemented with a mixture of 50 mg Vitamin E (VE) and 1 mg Se selenium (Se) /kg diet. All diets were isocaloric (2900 kcal ME/kg) and isofibrous. Results obtained could be summarized as follows: - Live body weight and body weight change were improved with the medium protein level (18%) followed by high protein (20%) and the low protein level (16%) during the whole experimental period. - Egg weight was significantly (P<0.05) decreased, while egg number increased (P<0.05) with the decrease of protein level. - Feed intake recorded an increase (P< 0.05) with the decrease of protein level. - Feed conversion ratio (g feed intake /g egg mass) revealed significantly worst (P<0.05) decrease by low protein level in diet. - Protein intake recorded an increase with increasing of protein level. - Efficiency of protein utilization was improved with low protein level 16% in the diet. - Hatchability recorded a non-significant difference (P>0.05) among groups. - Albumen % showed a significant (P<0.05) increase, while yolk % decrease with the increase of protein level. - Digestibility coefficients and the nutritive values expressed as DCP, TDN % and ME kcal/kg were significantly varied (P<0.05) among the different experimental diets, the different levels of protein did not significantly influence digestion coefficient of NFE. - Supplementing diet with VE and Se affected the final live body weight and body weight change were significant (P<0.05) during the experimental period as compared to unsupplemented diets. - Improvement of egg number and egg mass by 10.45 and 15.39 % compared to that of the unsupplemented, respectively. - Feed intake recorded an increase (P<0.05) with the supplemented of VE and Se. - Feed conversion ratio and hatchability percentage improved (P<0.05) with supplemented of VE and Se. - Digestibility coefficients and the nutritive values expressed as DCP, TDN % and ME kcal/kg were improved as compared to unsupplemented diets. - sThe higher economical efficiency was obtained by using 18% CP with supplemented of VE and Se obtained the best economical efficiency. - Interaction between dietary protein levels, VE and Se supplementation, indicated that supplemented experimental diets with VE and Se resulted enhanced the performance of these diets especially with 18 % CP levels. - It could be concluded that crude protein level of 18 % supplemented with Vitamin E and selenium (50 mg VE and 1 mg Se /kg diet) in the laying Japanese quail diet improve the productive performance and the economic efficiency. | ||||
| Keywords | ||||
| Quail; protein level; vitamin E; selenium; productive performance; egg quality; digestion trials and economical efficiency | ||||
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