Responses of laying performance, eggshell quality, calcium, and phosphorus metabolism to feeding patterns and dietary available phosphorus levels in aged laying hens

IF 3.8 1区农林科学 Q1 AGRICULTURE, DAIRY & ANIMAL SCIENCE Poultry Science Pub Date : 2024-10-30 DOI:10.1016/j.psj.2024.104469

Dan Shao, Liangji Liu, Haibing Tong

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Abstract

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.

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老龄蛋鸡的产蛋性能、蛋壳质量、钙和磷代谢对饲喂模式和日粮可用磷水平的反应

本研究旨在确定饲喂模式和日粮可用磷水平对老龄蛋鸡产蛋性能、蛋壳质量、钙和磷代谢的影响。实验采用 3 × 2 的因子排列，包括三种饲喂模式（每天饲喂两次，8:00 每天饲喂 1/2，14:00 每天饲喂 1/2；每天饲喂两次，8:00 每天饲喂 1/3，14:00 每天饲喂 2/3；每天饲喂三次，8:00 每天饲喂 1/3，14:00 每天饲喂 1/3，18:00 每天饲喂 1/3）和两种可利用磷水平（0.32 %、0.27 %），共饲养了 528 只 62-74 周龄的褐羽蛋鸡。每组有 8 个重复，每个重复 11 只母鸡。结果表明，在第 9-12 周，饲喂模式和磷水平与产蛋率、软壳蛋率和破损蛋率有显著的交互作用（P < 0.05）。每天饲喂三次和每天饲喂两次的不平衡饲喂模式显著改善了蛋鸡的赤道蛋壳厚度和平均蛋壳厚度（P < 0.05），并且在第 12 周有增加蛋壳强度的趋势（P= 0.068）。它们还能明显增加蛋壳的有效层厚度和钙化层厚度（P < 0.05）。此外，与每天饲喂两次相比，每天饲喂三次可显著提高血清钙含量（P＜0.05）；与其他两种饲喂模式相比，每天饲喂三次可显著提高蛋壳钙含量和子宫内CaBP-D28k的mRNA表达水平（P＜0.05）。而与其他两种饲喂模式相比，每天两次的不平衡饲喂会导致排泄物中磷含量增加（P < 0.05）。这些结果表明，以 0.27 % 的日粮可利用磷水平每天饲喂三次可提高老龄蛋鸡的产蛋性能和蛋壳质量。

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来源期刊

Poultry Science 农林科学-奶制品与动物科学

CiteScore

7.60

自引率

15.90%

发文量

审稿时长

94 days

期刊介绍： First self-published in 1921, Poultry Science is an internationally renowned monthly journal, known as the authoritative source for a broad range of poultry information and high-caliber research. The journal plays a pivotal role in the dissemination of preeminent poultry-related knowledge across all disciplines. As of January 2020, Poultry Science will become an Open Access journal with no subscription charges, meaning authors who publish here can make their research immediately, permanently, and freely accessible worldwide while retaining copyright to their work. Papers submitted for publication after October 1, 2019 will be published as Open Access papers. An international journal, Poultry Science publishes original papers, research notes, symposium papers, and reviews of basic science as applied to poultry. This authoritative source of poultry information is consistently ranked by ISI Impact Factor as one of the top 10 agriculture, dairy and animal science journals to deliver high-caliber research. Currently it is the highest-ranked (by Impact Factor and Eigenfactor) journal dedicated to publishing poultry research. Subject areas include breeding, genetics, education, production, management, environment, health, behavior, welfare, immunology, molecular biology, metabolism, nutrition, physiology, reproduction, processing, and products.