Abstract
The present study was conducted to evaluate the effect of chilled drinking water on the productivity of laying hens under constant high ambient temperature. A total of seventy-two, 123-day-old Hy-line brown layers was divided into two equal groups. The first group (UDWG) was given unchilled water (23.0±2.5°C) as a control, and the second group (CDWG) was given chilled water (16.0±0.5°C). The laying hens were kept at 30°C constant temperature with 50% relative humidity and were exposed to 17 h of light per day. Feed intake, egg production, egg quality (egg weight, shell weight, shell thickness, egg color, yolk color, and Haugh unit), and blood samples were collected and analyzed. The results showed that the feed intake of CDWG laying hens was significantly higher (11.64%) than the UDWG counterparts (p 0.10). Egg weight and egg quality were not affected by chilled drinking water. In conclusion, providing chilled drinking for laying hens under high ambient temperature improved feed intake and egg production.
Highlights
The present study was conducted to evaluate the effect of chilled drinking water on the productivity of laying hens under constant high ambient temperature
Teeter et al (1987) reported that KCl drinking water fortification increased feed consumption and growth rate when the temperature of consumed water was lower and our present results may be due to small sample size, age, and type of bird used, or due to the experimental methodology that was being applied
The laying hens in the chilled drinking water group (CDWG) produced significantly more (p
Summary
The present study was conducted to evaluate the effect of chilled drinking water on the productivity of laying hens under constant high ambient temperature. Heat have been conducted on the effects of high environmental stress on laying hens depresses egg production (Arima et al, temperature and humidity on the performance of different 1976; Muiruri and Harrison, 1991; Whitehead et al, 1998; poultry species, including broilers (Cooper and Washburn, Mashaly et al, 2004), egg weight This study was conducted to evaluate the effect of 16°C chilled drinking water to the productivity of laying hens under 30°C constant ambient temperature.
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