HARMS R H,RUSSELL G B,SLOAN D R.Performance of four strains of commercial layers with major changes in dietary energy[J].The Journal of Applied Poultry Research,2000,9(4):535-541.
[2]
PARSONS C M,KOLEKEBECK K W,ZHANG Y,et al.Effect of dietary protein and added fat levels on performance of young laying hens[J].The Journal of Applied Poultry Research,1993,2(3):214-220.
[3]
HY-LINE INTERNATIONAL.Hy-Line W36 commercial management guide[M].West Des Moines:Hy-Line Int.,2005.
[4]
LEESON S,CASTON L J.Response of laying hens to diets varying in crude protein or available phosphorus[J].The Journal of Applied Poultry Research,1996,5(3):289-296.
[5]
NOVAK C,YAKOUT H M,SCHEIDELER S E.The effect of dietary protein level and total sulfur amino acid:lysine ratio on egg production parameters and egg yield in Hy-line W-98 hens[J].Poultry Science,2006,85(12):2195-2206.
TARASEWICZ Z,SZCZERBI？SKA D,LIGOCKI M,et al.The effect of differentiated dietary protein level on the performance of breeder quails[J].Animal Science Papers and Reports,2006,24(3):207-216.
