Huang De-Jia, Yang Shyi-Kuen
Asian-Australas J Anim Sci. 2016 Mar;29(3):390-5. doi: 10.5713/ajas.15.0236. Epub 2016 Mar 1.
This study was conducted to investigate the effect of nocturnal light pulses (NLPs) on the feed intake and metabolic rate in geese. Fourteen adult Chinese geese were penned individually, and randomly assigned to either the C (control) or NLP group. The C group was exposed to a 12L:12D photoperiod (12 h light and 12 h darkness per day), whereas the NLP group was exposed to a 12L:12D photoperiod inserted by 15-min lighting at 2-h intervals in the scotophase. The weight of the feed was automatically recorded at 1-min intervals for 1 wk. The fasting carbon dioxide production rate (CO2 PR) was recorded at 1-min intervals for 1 d. The results revealed that neither the daily feed intake nor the feed intakes during both the daytime and nighttime were affected by photoperiodic regimen, and the feed intake during the daytime did not differ from that during the nighttime. The photoperiodic treatment did not affect the time distribution of feed intake. However, NLPs lowered (p<0.05) the mean and minimal CO2 PR during both the daytime and nighttime. Both the mean and minimal CO2 PR during the daytime were significantly higher (p<0.05) than those during the nighttime. We concluded that NLPs lowered metabolic rate of the geese, but did not affect the feed intake; both the mean and minimal CO2 PR were higher during the daytime than during the nighttime.
本研究旨在探究夜间光脉冲（NLPs）对鹅采食量和代谢率的影响。14只成年中国鹅单独饲养，并随机分为C（对照）组或NLP组。C组接受12小时光照：12小时黑暗的光周期（每天12小时光照和12小时黑暗），而NLP组接受12小时光照：12小时黑暗的光周期，在暗期每隔2小时插入15分钟光照。每周以1分钟的间隔自动记录饲料重量1周。禁食状态下的二氧化碳产生率（CO2 PR）以1分钟的间隔记录1天。结果显示，光周期方案对每日采食量以及白天和夜间的采食量均无影响，且白天采食量与夜间采食量无差异。光周期处理不影响采食量的时间分布。然而，夜间光脉冲降低了（p<0.05）白天和夜间的平均及最低CO2 PR。白天的平均和最低CO2 PR均显著高于（p<0.05）夜间。我们得出结论，夜间光脉冲降低了鹅的代谢率，但不影响采食量；白天的平均和最低CO2 PR均高于夜间。
