蛋白浓度对育成期蛋鸡啄羽行为和皮肤损伤的影响

The effects of protein concentration on feather pecking and skin damage of laying hens during incubation period

海兰白羽蛋育成鸡150只,按照试验设计随机分3组,每组50只,每笼5只鸡。试验鸡只被饲养在14%、17%和19%三个不同的蛋白浓度质水平条件下。从第9周到第10周这个期间试验观察鸡只的啄羽行为,同时也研究啄羽行为的细节,试验观察记录被啄鸡只的身体皮肤部位。在观察期间对皮肤损伤状况进行评分。被啄鸡只的身体皮肤损伤部位主要是尾部皮肤(42.96%)、背部皮肤(22.26%)和头部皮肤(14.09%)。育成期蛋鸡的皮肤损伤评分的总分随着蛋白浓度增加呈下降趋势,鸡只的身体只是轻微损伤。

：From 9 week to 10 week, 150 Hailan layers were assigned at random to groups of 5 individ- uals and distributed among 30 pens.They were kept in pens with three protein levels（14%, 17%, 19%）. Feather pecking and its behaviour detail were observed in this study.We observed skin partitions of body pecked by laying hens.During the observation,the skin damage were scored. When feather peck- ing occurred, the main skin parts of body peeked by laying hens was followed by tai1（42.96%）, back （22.26%） and head（14,09%）. The total score of damaged feather of laying hens was decreased with the increasing of protein concentration. But the damage of skin was little,