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Title

THE EFFECTS OF DIFFERENT LEVELS OF DIETARY ENERGY AND PROTEIN ON PERFORMANCE AND CARCASS CHARACTERISTICS OF JAPANESE QUAILS

Pages

 Start Page 55 | End Page 63

Abstract

 This study was carried out to evaluate the effects of different levels of dietary metabolizable ENERGY and crude PROTEIN on performance (during 5-24 and 25-38 days of old) and carcass characteristics of JAPANESE QUAILs. The experiment was conducted in a 3×5 factorial arrangement in a completely randomized design with four replicates at each treatment and 40 quails at each replicate. Fifteen diets including three levels of metabolizable ENERGY (2800, 2900 and 3000 kcal ME/ kg) and five levels of crude PROTEIN (22, 23, 24, 25 and 26%) were considered. On day 41, one hundred twenty birds were slaughtered to access carcass characteristics. No significant interaction among ENERGY-protein and PROTEIN levels on measured characters was observed. During 5-24 days of old, daily weight gain of quails fed 3000 kcal ME/ kg diet (4.42 g) was higher than the other levels (P<0.01) and feed conversion ratio was lower in 3000 (2.90) than 2800 ME (kcal/kg of diet) (3.21) (P<0.01). During 25-38 days of old, daily weight gain increased (6.16 g) and feed conversion ratio decreased (3.52) with increasing ME level from 2800 to 3000 kcal ME/ kg (P<0.05). The ME level had not significant affect on feed intake and carcass, breast and thigh yields. It concluded that using diets containing 3000 kcal ME/ kg and 22% crude PROTEIN is recommendable to achieve a desirable performance in JAPANESE QUAILs.

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