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Turkish Journal of Veterinary & Animal Sciences

DOI

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Abstract

In this study, the effects of different density diets (15% HP, 2700 kcal/kg ME, Diet N; 18% HP, 3025 kcal/kg ME, Diet Y), and different feeding methods on yield, egg quality, blood acid-base balance, serum metabolites, and nutrient digestibility were determined in laying hens at heat stress. Sixteen-week-old hens (Ross Brown) were divided into 6 group of 30 hens each and study was conducted in a 3 x 2 factorial experimental design. The diets were given to animals by three methods during heat stress. The feeding methods were as follows. Both diets were given to hens through traditional ways (Control Group N and Y); during the hottest hours of the day, feed withdrawal was conducted and the darkening was excluded (Withdrawal Group N and Y); and the house was darkened by black curtains between 14^{00}-18^{00} and feed withdrawal was not done Darkening Group N and Y. During the treatments, diets and feeding methods had significant effects on feed intake (p

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