Effect of different levels of metabolisable energy and crude protein on performance, some blood parameters and carcass characteristics of Japanese quail during finishing period

Document Type : Research Paper

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Abstract

This research was conducted to investigate the effect of different levels of metabolisable energy and crude protein on performance, carcass characteristics and blood parameters of Japanese quail (Coturnix coturnix japonica) during finishing period (29-49 d of age). Nine hundreds 28-d old birds were used to examine three levels of energy (2900, 3050 and 3200 kcal/kg) and three levels of crude protein (21.6, 24 and 26.4%) by a 3ˣ3 factorial arrangement in a completely randomized design with 5 replicates and 20 birds per each replicate. In the end of the experiment, two birds from each replicate were selected to measure the blood parameters (TG, total cholesterol, LDL and uric acid) and carcass characteristics. Dietary content of 3200 kcal/kg significantly improved (P<0.05) daily weight gain and feed conversion ratio compared to other energy levels. Effect of different levels of crude protein on performance was not significant (P>0.05). Different levels of energy and protein and their interaction affected (P<0.05) the relative weight of liver. Generally, high levels of energy and protein significantly reduced (P<0.05) this parameter. Diets containing 3200 kcal/kg reduced (P<0.05) the total cholesterol and LDL concentrations compared to those of other energy levels. Based on the results of present study, the diet containing 3200 kcal/kg ME and 21.6% crude protein is proposed in Japanese quail nutrition for the finisher phase.

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References

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Animal Sciences Journal
Volume 29, Issue 110
June 2016
Pages 181-190

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