Bates D P, Hanson L E, Cook M E, Wentworth B C, Sunde M L, Bitgood J J
Poult Sci. 1987 Apr;66(4):605-12. doi: 10.3382/ps.0660605.
In two trials with breeding pheasants, pheasants were assigned to two male:female sex ratios (1:12 and 1:18) arranged factorially with two lighting regimens (14 or 16 hr of light) in a 24-hr period. In each trial, 1644 or 1680 pheasant hens divided in two replicates were assigned to each experimental treatment and placed in controlled environment housing. Hen mortality, percent culled eggs, total eggs per hen-housed, fertility, hatchability, and usable chicks per hen-housed were determined over a 9-week production period. Although mortality and percent hatch were not affected by either sex ratio or lighting, percent culled eggs increased with increased light (16 hr light) and usable chicks per hen-housed decreased with increased light. Increasing the sex ratio from 1:12 to 1:18 increased egg production but decreased fertility. These data demonstrate that pheasants reared in a controlled environment require less than 16 hr light for maximizing usable chick production per hen-housed and there is a trade-off between fertility and egg production.
在两项针对养殖雉鸡的试验中，将雉鸡按照两种雌雄比例（1:12和1:18）进行分配，这两种比例与两种光照方案（24小时周期内光照14或16小时）进行析因排列。在每项试验中，将1644只或1680只分成两个重复的雌性雉鸡分配到每种实验处理中，并置于可控环境的鸡舍中。在9周的生产期内，测定母鸡死亡率、剔除蛋的百分比、每只母鸡的总产蛋数、受精率、孵化率以及每只母鸡的可用雏鸡数。尽管死亡率和孵化百分比不受性别比例或光照的影响，但剔除蛋的百分比随光照增加（16小时光照）而增加，每只母鸡的可用雏鸡数随光照增加而减少。将性别比例从1:12提高到1:18会增加产蛋量，但会降低受精率。这些数据表明，在可控环境中饲养的雉鸡，为使每只母鸡的可用雏鸡产量最大化，所需光照少于16小时，并且在受精率和产蛋量之间存在权衡。
