RT Journal
T1 PHYSIOLOGICAL PARAMETERS AND THERMAL COMFORT INDICES OF LAYERS FED VEGETABLE GLYCERIN
A1 T. L. de Sena2
A1 S. C. Bastos-Leite
A1 A. M. de Vasconcelos
A1 C. de C. Goulart
A1 M. R. S. de Farias
A1 J. de S.Maranguape
JF Journal of Animal and Plant Sciences
JO JAPS
SN 1018-7081
VO 29
IS 1
SP 33
OP 40
YR 2019
FD 2019/02/01
DO DOI N/A
AB <p>The aim of this study was to evaluate the physiological parameters and thermal comfort indices of commercial layers<br>fed diets containing different levels of vegetable glycerin. A total of 378 Hy-Line White layers at 32 weeks of age were<br>housed in a shed at nine birds per cage. The experiment lasted 84 days. Treatments consisted of a control diet (without<br>glycerin) plus five diets with increasing levels of vegetable glycerin (3, 6, 9, 12, and 15%). The black globe humidity<br>index (BGHI) and radiant heat load (RHL) were out of the thermal comfort zone and were higher in the afternoon period<br>in all production cycles. Respiratory frequency was lower in the morning, when 3% glycerin were added to the diet. The<br>surface temperatures of comb, wattle, back, wings, head, and feet did not differ with the glycerin levels and were higher<br>in the 2nd cycle, but within the range recommended for the species. Glycerin inclusion levels of up to 12% can be used<br>to partially replace corn in diets for layers housed in sheds covered with ceramic tiles without compromising their<br>thermoregulation in a hot environment.</p>
K1 Alternative Feeds. Homeothermy. Poultry Farming. Thermal Environment.
PB Pakistan Agricultural Scientists Forum
LK https://thejaps.org.pk/AbstractView.aspx?mid=AS-17-0200