| Popis: |
Beginning at 22 wk of age, broiler breeder hens were fed one of six experimental diets. Diets 1 and 2 were fed to provide each bird an ME intake of 467 kcal/day (high) at peak production [467 peak Calories/day (PCD)], whereas Diets 3 and 4 contained low ME levels (430 PCD), and Diets 5 and 6 contained moderate ME levels (449 PCD). Diets 1 and 3 contained 3.0% added poultry fat, Diets 2 and 4 contained no added fat, Diet 5 contained 1.5% added poultry fat, and Diet 6 contained 3.0% added corn oil. Eggs were collected when hens were 29 wk of age. Embryonic mortality, hatchability, and subsequent growout performance were assessed through 42 d of broiler age. Added fat type (poultry fat or corn oil), poultry fat level (1.5 or 3.0%), or ME level from low (430 PCD) to high (467 PCD) in the diets of young (29-wk-old) breeder hens had no effects on subsequent embryogenesis, hatchability, or posthatch growout performance of broiler offspring. It was concluded that 1.5 and 3.0% added poultry fat or 3.0% added corn oil may be effectively used to adjustMEbetween low and high levels in the diets of young breeder hens without subsequent effects on broiler embryogenesis and growout performance. |
