Effects of different feeding strategies on egg production, eggshell quality, tibial mass and intestinal calcium transporter expression in laying hens.

IF 1.6 3区 农林科学 Q2 AGRICULTURE, DAIRY & ANIMAL SCIENCE
X X He, Z M Fu, Z Yang, L R Zhu, X Wan, H Yang, Z Wang, S P Rose, V R Pirgozliev
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Abstract

1. This study examined feeding practices that could affect the expression of intestinal calcium transporter gene, tibial mass, eggshell quality and production performance in 25-week-old Hy-Line Brown Laying Hens.2. In this study, 360 healthy 25-week-old Hy-Line Brown laying hens were divided into three treatment groups with 10 replicates of 12 hens per group. The groups were fed as follows: 1) Twice a day, 50% of the standard breeder diet was fed at 8:00 and 15:00 (CFG); 2) Two-thirds of the standard breeder diet was fed at 8:00 and 15:00 (UFG), respectively; 3) Two different diets were fed separately, 50% at 8:00 and 50% at 15:00 (SFG)3. The feed-to-egg ratios of the CFG and SFG groups were significantly higher than those of the UFG group. The eggshell weight of the UFG group was numerically reduced (p > 0.05) compared to the CFG and SFG groups. The papilla, barrier, effective layers and the thickness of the particular eggshell layers were different in each group. The amount of calcium (Ca) and phosphorus (P) in the bones, eggshells and excreta varied by group. According to gene expression analysis, PMCA and CaBP-28K expression in the duodenum and jejunum differed significantly4. The results suggested that segmented feeding may enhance Ca deposition in eggshells, reduce bone Ca loss and improve its utilisation efficiency. This feeding strategy results in enhanced performance in layers and improves eggshell quality.

不同饲养策略对蛋鸡产蛋量、蛋壳品质、胫骨质量和肠道钙转运蛋白表达的影响
1. 本试验研究了饲喂方式对25周龄海兰褐蛋鸡肠道钙转运蛋白基因表达、胫骨质量、蛋壳品质和生产性能的影响。试验选用健康的25周龄海兰褐蛋鸡360只,分为3个处理组,每组10个重复,每组12只鸡。各组饲喂方式如下:1)每天2次,分别于8:00和15:00饲喂50%的标准种饲粮(CFG);2)分别在8:00和15:00 (UFG)饲喂三分之二的标准种饲粮;3) 8:00和15:00分别饲喂50%和50%两种不同饲粮(SFG)3。CFG组和SFG组料蛋比显著高于UFG组。与CFG组和SFG组相比,UFG组的蛋壳重量有数值降低(p > 0.05)。各组的乳头、屏障层、有效层及特定蛋壳层的厚度不同。骨、蛋壳和排泄物中钙、磷的含量因组而异。基因表达分析显示PMCA和CaBP-28K在十二指肠和空肠中的表达差异显著4。由此可见,分段饲喂可促进蛋壳钙沉积,减少骨钙流失,提高蛋壳钙的利用效率。这种饲养策略提高了蛋鸡的生产性能,改善了蛋壳质量。
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来源期刊
British Poultry Science
British Poultry Science 农林科学-奶制品与动物科学
CiteScore
3.90
自引率
5.00%
发文量
88
审稿时长
4.5 months
期刊介绍: From its first volume in 1960, British Poultry Science has been a leading international journal for poultry scientists and advisers to the poultry industry throughout the world. Over 60% of the independently refereed papers published originate outside the UK. Most typically they report the results of biological studies with an experimental approach which either make an original contribution to fundamental science or are of obvious application to the industry. Subjects which are covered include: anatomy, embryology, biochemistry, biophysics, physiology, reproduction and genetics, behaviour, microbiology, endocrinology, nutrition, environmental science, food science, feeding stuffs and feeding, management and housing welfare, breeding, hatching, poultry meat and egg yields and quality.Papers that adopt a modelling approach or describe the scientific background to new equipment or apparatus directly relevant to the industry are also published. The journal also features rapid publication of Short Communications. Summaries of papers presented at the Spring Meeting of the UK Branch of the WPSA are published in British Poultry Abstracts .
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