Deaton J W, Branton S L, Lott B D, Brake J D
Poult Sci. 1985 May;64(5):1035-7. doi: 10.3382/ps.0641035.
Two trials were conducted with Single Comb White Leghorn pullets reared from 0 to 19 weeks of age in cages and on litter at the same environmental temperature. Samples were obtained to determine if digestive system differences existed. Criteria measured were gizzard weight and intestine length. Results showed that floor-reared pullets had heavier gizzards with longer intestines than cage-reared pullets. The difference may be caused by consumption of litter by the floor-reared birds.
在相同环境温度下,对0至19周龄的单冠白来航小母鸡进行了两项试验,一组在笼中饲养,另一组在垫料上饲养。采集样本以确定消化系统是否存在差异。测量的标准是砂囊重量和肠道长度。结果表明,地面饲养的小母鸡砂囊更重,肠道更长,比笼养小母鸡的长。这种差异可能是由于地面饲养的鸡食用了垫料所致。