Davis G S, Siopes T D, Peiffer R L, Cook C
Am J Vet Res. 1986 Apr;47(4):953-5.
Large White commercial tom poults were grown from 1 day to 8 weeks of age in the following light treatments: (i) continuous incandescent light (24LL); (ii) 23 hours of incandescent light and 1 hour of darkness/day (23L:1D); (iii) 12 hours of incandescent light and 12 hours of darkness/day (12L:12D); or (iv) natural decreasing day lengths (natural). At 8 weeks of age, significant (P less than 0.05) morphologic changes in eyes occurred. Poults exposed to the 24LL or 23L:1D had heavier eyes than did poults exposed to the 12L:12D or natural day length. In addition, the eye size (anterior to posterior diameter and horizontal width) exposed to the 24LL treatment was greater than those exposed to 23L:1D, 12L:12D, or natural day length. Cornea heights of poults exposed to 24LL or 23L:1D were smaller than cornea heights of those exposed to 12L:12D or natural day length. Marked differences did not occur in intraocular pressure among treatments.
大型白羽商用公雏鸡从1日龄饲养至8周龄，接受以下光照处理：(i) 持续白炽灯照明（24小时光照）；(ii) 每天23小时白炽灯照明和1小时黑暗（23小时光照:1小时黑暗）；(iii) 每天12小时白炽灯照明和12小时黑暗（12小时光照:12小时黑暗）；或(iv) 自然递减的日长（自然光照）。8周龄时，眼睛出现了显著（P<0.05）的形态变化。接受24小时光照或23小时光照:1小时黑暗处理的雏鸡眼睛比接受12小时光照:12小时黑暗或自然日长处理的雏鸡眼睛更重。此外，接受24小时光照处理的眼睛大小（前后直径和水平宽度）大于接受23小时光照:1小时黑暗、12小时光照:12小时黑暗或自然日长处理的眼睛。接受24小时光照或23小时光照:1小时黑暗处理的雏鸡眼高小于接受12小时光照:12小时黑暗或自然日长处理的雏鸡眼高。各处理间眼压无明显差异。
