Siopes T D
Poult Sci. 1984 Jul;63(7):1449-52. doi: 10.3382/ps.0631449.
Yearling turkey breeder hens were recycled into a second egg production cycle by exposure to 16 hr of light per day (16L:8D) of .5, 2.2, 4.3, or 7.6 lx intensity. Controls were exposed to 6L:18D of 55 lx intensity. At the end of the 8-week recycling treatments, all hens were photostimulated with 16L:8D of 55 lx intensity and the time to first egg and rate of egg production were recorded. Low light intensity terminated photorefractoriness and resulted in egg production comparable to the controls in the .5 lx treatment only. Light intensities of 2.2, 4.3, and 7.6 lx resulted in significantly reduced egg production. Turkey hens can be successfully recycled with a low light intensity of .5 lx but not 2.2 lx or greater.
将一岁的种火鸡母鸡通过每天暴露于光照强度为0.5、2.2、4.3或7.6勒克斯的16小时光照（16L:8D），使其进入第二个产蛋周期。对照组则暴露于光照强度为55勒克斯的6L:18D环境中。在为期8周的循环处理结束时，所有母鸡都用光照强度为55勒克斯的16L:8D进行光刺激，并记录产第一枚蛋的时间和产蛋率。低光照强度终止了光不应性，仅在0.5勒克斯处理中导致产蛋量与对照组相当。2.2、4.3和7.6勒克斯的光照强度导致产蛋量显著降低。火鸡母鸡可以通过0.5勒克斯的低光照强度成功循环利用，但不能用2.2勒克斯或更高强度。
