7Hurnik J F.Welfare of Farm Animal[J].Applied Animal Behavioral Science.1988,16:165-173.
8Savory C,Maros K.Influence of Degree of Food Restriction,Age and Time of Day on Behavior of Broiler Breeder Chickens[J].Behavior Process,1993,29:179-190.
9Buyse J,E R Kuhn,E Decuypere.The Use of Intermit Tent Lighting in Broiler Raising:I.Effect on Broiler Performance and Efficiency of Nitrogen Retention[J].Poultry Science,1996,75:589-594.