TY  - JOUR
T1  - Effect of Dietary Crude Protein and Energy on Gaoyou Ducklings Growth Performance and Carcass Trait
AU - Wang, Q. AU - Li, H.F. AU - Dai, Y.L. AU - Chen, K.W. AU - Li, B.L. AU - Wang, Z.Y. AU - Zhang, J. 
JO  - Journal of Animal and Veterinary Advances
VL  - 9
IS  - 4
SP  - 826
EP  - 830
PY  - 2010
DA  - 2001/08/19
SN  - 1680-5593
DO  - javaa.2010.826.830
UR  - https://makhillpublications.co/view-article.php?doi=javaa.2010.826.830
KW  - Gaoyou ducklings
KW  -crude protein
KW  -metabolizable energy
KW  -growth performance
KW  -carcass traits
KW  -China
AB  - The study was undertaken to assess dietary CP and ME concentrations for optimum growth performance and carcass characteristics of Gaoyou ducklings. In a 3x3 factorial arrangement, three hundred and sixty zero-day-old  Gaoyou ducklings were  randomly  assigned  to experimental diets with 11.70, 11.90 and 12.12 MJ of ME kg<SUP>-1</SUP> of diet; each contained 18.0, 19.0 and 20.0% CP, respectively, from 0-28 days of age. Each dietary treatment had 4 replicates. Body weight and feed consumptions were  measured at every weekend, from 0-28 days of age and carcass characteristics were evaluated at 28 days of age. The result showed that ducklings on a diet with 11.70 and 11.90 MJ of ME kg<SUP>-1</SUP> at 0-28 days of age exhibited greater BW gain than this diet with 12.12 MJ of ME kg<SUP>-1</SUP> (p&lt;0.01), though BW gain was not different among 11.70 and 11.90 MJ of ME kg<SUP>-1</SUP> of diet. Mean BW gain of birds fed 18.0, 19.0 and 20.0% CP diets was significantly different (p&lt;0.001). Feed intake was influenced by dietary ME levels (p&lt;0.000) also. Feed intake of birds fed 18.0% CP diets was higher than those of birds on 19.0 and 20.0% CP diets (p&lt;0.01). Feed conversion ratios of birds fed on 11.70 and 11.90 MJ of ME kg<SUP>-1</SUP> of diet were better than those fed on 12.12 MJ of ME kg<SUP>-1</SUP> (p&lt;0.001). Feed conversion ratios of birds fed on 18.0% CP diets were better than those fed on 19.0 and 20.0% CP diets. In the study, there were significant interactions between dietary CP and ME on growth performance. There was a direct relationship between dietary ME levels and eviscerated carcass percentage (p&lt;0.014), abdominal fat percentage (p&lt;0.000) and breast weight (p&lt;0.037). But the half-eviscerated carcass percentage, eviscerated carcass percentage, breast and leg meat percentage were not influenced by dietary CP concentration. Thus, diets with 11.70 MJ of ME kg<SUP>-1</SUP> and 18.0% CP were used more efficiently from 0-28 days of age by Gaoyou ducklings.
ER  -