Effect of Light Duration and Variation on the Growth and Reproductive Performance in Breeder Geese.

IF 2.5 2区 农林科学 Q1 AGRICULTURE, DAIRY & ANIMAL SCIENCE
Min Jung Lin, Shen Chang Chang, Li Jen Lin, Jhih Siang Chang, Shao Yu Peng, Tzu-Tai Lee
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引用次数: 0

Abstract

Objective: This study aims to investigate the effects of time and light variation on the growth and reproductive performances of breeder geese.

Methods: A total of 32 ganders and 96 dames in their first laying season, with an average age of 10 months, were assigned to eight rooms, each containing four ganders and twelve dams. A split-plot design was used, incorporating two prelay photoperiod treatments: a 7-hour light period (P7H), in which the photoperiod was maintained at seven hours for the first six weeks, and a gradually decreasing light (GDL) group, in which the light duration was initially set at 12 hours and then reduced by one hour per week during the prelay period. Two variable photoperiod schedules were applied as sub-treatments and randomized across the rooms. In one treatment, the egg production rate in breeder geese decreased to an average below 30%, after which the photoperiod increased by 15 minutes each week (change time, CHP). A fixed photoperiod of nine hours was maintained (fixed time, FIXP) until the end of the egg-laying period.

Results: Geese in the GDL light group had a longer laying duration than P7H light group (243.75 vs 191.75 days; p<0.01). Number of eggs per goose in the GDL light group showed a trend toward higher values than P7H light group. However, the fertility and hatchability in GDL light group were significantly lower than the P7H light group at all periods, respectively.

Conclusion: Geese exposed to a 12-hour light (12L:12D) regimen during the pre-laying period exhibited a longer laying duration and higher egg production per bird. However, maintaining a fixed lighting schedule of 9 hours of light and 15 hours of darkness (9L:15D) after the peak laying period is recommended to optimize production profitability by supporting better fertility and hatchability.

光照时长和光照变化对种鹅生长和繁殖性能的影响。
目的:研究时间和光照变化对种鹅生长和繁殖性能的影响。方法:选用平均月龄为10月龄的首产季公鹅32只,母鹅96只,分配到8个房间,每个房间4只公鹅,12只母鹅。采用分块设计,采用两种提前光周期处理:一种是7小时光照周期(P7H),在前6周保持7小时光照;另一种是逐渐减少光照(GDL)组,光照时间最初设定为12小时,然后在提前期间每周减少1小时。两个可变的光周期计划被应用为亚处理,并在房间中随机化。在一个处理中,种鹅产蛋率平均下降到30%以下,之后每周增加15分钟的光照时间(CHP)。维持9小时的固定光周期(fixed time, FIXP),直至产卵期结束。结果:GDL光照组的产蛋持续时间较P7H光照组长(243.75 vs 191.75 d);结论:产蛋前期光照12小时(12L:12D)的鹅产蛋持续时间较长,单只产蛋量较高。然而,建议在产卵高峰期后保持9小时光照和15小时黑暗(9L:15D)的固定光照计划,以通过支持更好的繁殖力和孵化率来优化生产盈利能力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Animal Bioscience
Animal Bioscience AGRICULTURE, DAIRY & ANIMAL SCIENCE-
CiteScore
5.00
自引率
0.00%
发文量
223
审稿时长
3 months
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