PERFORMANCE OF MUSCOVY DUCKLINGS FED ENERGY DILUTED DIET AND YEAST CULTURE. | ||||
| Journal of Animal and Poultry Production | ||||
| Article 7, Volume 28, Issue 7, July 2003, Page 5283-5294 PDF (1.61 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jappmu.2003.252535 | ||||
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| Authors | ||||
| M. S. M. Samy; Laila D. Abd EI-Samee | ||||
| Animal Production Department, National Research Centre, Dokki, Giza, Egypt | ||||
| Abstract | ||||
| One hundred and twenty unsexed one-day old Muscovy ducklings were distributed into four equal groups each of 3 replicates (10 birds/replicate). Ducklings were fed on starter diets during the first 14 days post hatching followed by grower diets till the end of the experiment. Starter and grower diets differed in energy level and added Yeast culture (YC) to form 4 dietary treatments being diet 1 (control), containing adequate-energy levels (approximately 2940 and 3040 kcal ME/kg during the starter and grower periods, respectively). Diet 2 was as diet 1 but with addition of YC. Diet 3 has diluted-energy levels (approximately 2700 and 2480 kcal ME/kg during the starter and grower periods, respectively). Diet 4 was as diet 3 but with addition of YC. Results indicated that body weight (BW) and body weight gain (BWG) were decreased during most age intervals by feeding the diluted-energy diet with insignificant increases occurred with addition of YC, but final BW was still lower compared to the control. Addition of YC to the adequate-energy diet increased BW and BWG during the early age but had no effect thereafter. Feed intake (FI) was increased by feeding the diluted-energy diet with further increase observed with addition of YC. However, such increases cannot maintain energy intake similar to the control. Addition of YC to the adequate-energy diet did not affect FI. Ducklings fed en the diluted-energy diet with Or without YC were less efficient in converting feed into gain. Addition of YC to the adequate-energy diet improved feed conversion during the early age but not thereafter. However, dilution of dietary energy either wUh or without YC and also inclusion of YC in the adequate-energy diet resulted in better effIciency pf.. energy utilization compared to the control. Edible and inedible parts, eviscerated carcass and visceral and pad fats were decreasedwith feeding. the diluted-energy diet with further decreases occurred due to addition of YC. Addition of YC to the adequate- energy diet caused insignificant increase in eviscerated carcass with small decrease in visceral and pad fats. Decreasing dietary energy had no effect on meat crude protein, while it decreased its fat. Addition of YC to the adequate-energy diet significantly decreased meat fat. _ It is concluded that diluting dietary energy of Muscovy ducklings achieved desired reduction in carcass fatness but it decreased carcass yield and negatively affected economic efficiency. Addition of YC to such diluted diet caused further decrease in carcass fatness with small increase in carcass yield without improving economic efficiency. Addition of YC to adequate-energy diet caused a slight increase in carcass yield with a small decrease in carcass fatness without affecting economic efficiency. | ||||
| Keywords | ||||
| Ducklings; energy dilution. yeast. performance. carcass | ||||
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