Protein and Energy Requirements of Hybrid (White Leghorn×Barred Plymouth Rock) Laying Hen
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概要
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Two experiments were conducted to investigate protein and energy requirements of hybrid laying hen.In experiment 1, four kinds of diets, which contained either levels of 13 or 18% of crude protein (CP) and of 60 or 68% total digestible nutrients (TDN), were used and compared with 76 strain crossbred pullets of White Leghorn (WL) and 128 hybrid of WL×Barred Plymouth Rock (BP) on the laying performance.In experiment 2, CP-TDN levels in experimental diets were 18-66, 18-63, 15-66, 15-63, 15-60%. These dietary protein and TDN levels were calculated based on MORIMOTO'S Table.A total of 150 hybrid (WL×BP) used in Experiment 2 were obtained from the same stock in Experiment 1. All groups were fed ad lib during experimental period and housed at individual laying cage.
- 日本家禽学会の論文
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