Год выпуска: 2011 Автор: Mohamed Abd El-Hack,Ali Askar and Khalid Mahrose Издательство: LAP Lambert Academic Publishing Страниц: 192 ISBN: 9783845406053
Описание
In this book you will read every thing about the harmful effects of heat stress on laying hens' health and production from different aspects and how to cope with these effects. The present study was carried out at the Laying Hens Research Farm, Department of Poultry, Faculty of Agriculture, Zagazig University, Zagazig, Egypt, during the period from July to September 2008. A total number of 243 forty two weeks of age, Bovans laying hens were randomly distributed into twenty seven treatment groups to investigate the effect of dietary vitamin A (0, 8000 and 16000 IU/ kg diet), vitamin E (0, 250 and 500 mg/ kg diet) and selenium (0, 0.25 and 0.50 mg/ kg diet) on the productive performance and some physiological, immunological and hematological traits of Bovans laying hens reared under Egyptian summer conditions.
