老龄蛋鸡产蛋性能、蛋壳质量、钙和磷代谢对饲喂模式及日粮有效磷水平的反应
Responses of laying performance, eggshell quality, calcium, and phosphorus metabolism to feeding patterns and dietary available phosphorus levels in aged laying hens.
作者信息
Shao Dan, Liu Liangji, Tong Haibing
机构信息
Jiangsu Institute of Poultry Science, Yangzhou, Jiangsu 225125, China.
Jiangsu Institute of Poultry Science, Yangzhou, Jiangsu 225125, China.
出版信息
Poult Sci. 2025 Jan;104(1):104469. doi: 10.1016/j.psj.2024.104469. Epub 2024 Oct 30.
This study aimed to determine the effects of feeding patterns and dietary available phosphorus levels on laying performance, eggshell quality, calcium, and phosphorus metabolism in aged laying hens. The experiment followed a 3 × 2 factorial arrangement of three feeding patterns (feeding twice a day, 1/2 daily feeding at 8:00, and 1/2 daily feeding at 14:00; disequilibrium feeding twice a day, 1/3 daily feeding at 8:00, and 2/3 daily feeding at 14:00; feeding thrice a day, 1/3 daily feeding at 8:00, 1/3 daily feeding at 14:00, and 1/3 daily feeding at 18:00) and two available phosphorus levels (0.32 %, 0.27 %) was carried out with a total of 528 Hy-Line Brown laying hens aged 62-74 weeks. Each group had 8 replicates of 11 hens. The results revealed that feeding patterns and phosphorus levels significantly interacted with egg production ratios, soft shell and broken egg ratios in weeks 9-12 (P < 0.05). Feeding thrice a day and disequilibrium feeding twice a day significantly improved the equatorial and average eggshell thickness (P < 0.05), and had a trend of increasing eggshell strength at week 12 (P= 0.068). They also significantly increased the effective layer thickness and the calcified layer thickness of the eggshell (P < 0.05). Additionally, feeding thrice a day significantly increased serum calcium content compared with feeding twice a day (P < 0.05), and feeding thrice a day significantly increased the calcium content of the eggshell, mRNA expression level of CaBP-D28k in the uterine compared with the other two feeding patterns (P < 0.05). While disequilibrium feeding twice a day resulted in higher phosphorus content in the excreta compared with the other two feeding patterns (P < 0.05). These results indicated that feeding hens thrice a day with 0.27 % dietary available phosphorus level might improve in laying performance and eggshell quality of aged laying hens.
本研究旨在确定饲喂模式和日粮有效磷水平对老龄蛋鸡产蛋性能、蛋壳质量、钙和磷代谢的影响。试验采用3×2析因设计，设三种饲喂模式（每日喂料2次，8:00喂料量占全天的1/2，14:00喂料量占全天的1/2；每日不均衡喂料2次，8:00喂料量占全天的1/3，14:00喂料量占全天的2/3；每日喂料3次，8:00、14:00和18:00各喂料量占全天的1/3）和两个有效磷水平（0.32%、0.27%），选用528只62 - 74周龄的海兰褐蛋鸡。每组有8个重复，每个重复11只鸡。结果表明，饲喂模式和磷水平对9 - 12周龄蛋鸡的产蛋率、软壳蛋和破蛋率有显著交互作用（P < 0.05）。每日喂料3次和每日不均衡喂料2次显著提高了蛋壳赤道厚度和平均厚度（P < 0.05），且在第12周有提高蛋壳强度的趋势（P = 0.068）。它们还显著增加了蛋壳的有效层厚度和钙化层厚度（P < 0.05）。此外，与每日喂料2次相比，每日喂料3次显著提高了血清钙含量（P < 0.05），与其他两种饲喂模式相比，每日喂料3次显著提高了蛋壳钙含量、子宫中CaBP - D28k的mRNA表达水平（P < 0.05）。而每日不均衡喂料2次导致排泄物中磷含量高于其他两种饲喂模式（P < 0.05）。这些结果表明，日粮有效磷水平为0.27%时，每日喂料3次可能会提高老龄蛋鸡的产蛋性能和蛋壳质量。
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