Effect of supplementation continuously in pullet and early lay period with Bacillus subtilis and yeast cell wall on the intestinal morphology, bone parameters, and egg quality of hens.
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引用次数: 0
Abstract
The aim of this study was to investigate effect of Bacillus subtilis (BS), yeast cell wall (YCW), and their combination on intestinal and bone development and egg production of young hens. A total of 160, one-day-old Hy-Line Sonia chicks were randomly allocated into 4 treatments of 8 replicate cages of 5 birds each. Treatments were arranged in a 2 (0 and 0.5 g/kg of BS) × 2 (0 and 2 g/kg of YCW) factorial arrangement for a duration of 170-d as follows: (1) regular diet (Control group); (2) the regular diet plus 0.5 g BS/kg (BS group); (3) the regular diet plus 2 g YCW/kg (YCW group); and (4) the regular diet plus 0.5 g BS/kg and 2 g YCW/kg (BS + YCW group). One bird from each of the 8 replicate cages per treatment were randomly taken for sampling at d 110 and 170, respectively. Results indicated that there were different effects of BS and YCW on bird organ development and innate immune. YCW supplementation increased thymus index and serum concentrations of IgM of hens (p < 0.05). In addition, an interaction was observed between YCW diet and age on serum IL-6 concentrations (p < 0.05), mainly because YCW birds had the highest serum IL-6 concentration at d 110. Dietary supplementation with BS reduced the crypt depth in the duodenum and jejunum with an increased ratio of villus height to crypt depth (p < 0.05) in the duodenum, jejunum, and ileum. However, a YCW × age interaction on the jejunal villus height existed, mainly because non-YCW diet had the lowest jejunal villus height at d 170 (p < 0.05). Both BS and YCW enhanced egg weight, eggshell thickness and yolk color (p < 0.05), while YCW improved albumen height and Haugh unit (p < 0.05). There was no treatment effect on measured bone parameters except that YCW birds had lager tibial diameter (p < 0.05) at d 170. The results indicate that dietary BS and/or YCW improve the intestinal and bone development and immune status of young hens, which may contribute to the increased egg quality during the early sexual maturity stage.
本试验旨在研究枯草芽孢杆菌（Bacillus subtilis， BS）和酵母细胞壁（yeast cell wall， YCW）及其组合对雏鸡肠道和骨骼发育及产蛋量的影响。选取160只1日龄海兰索尼亚雏鸡，随机分为4个处理，8个重复笼，每个重复笼5只。试验组按2（0和0.5 g/kg BS） × 2（0和2 g/kg YCW）因子处理，试验期170 d。(2)常规日粮加0.5 g BS/kg （BS组）；(3)常规日粮加2 g YCW/kg （YCW组）；(4)常规饲粮加0.5 g BS/kg和2 g YCW/kg （BS + YCW组）。在第110天和第170天，每个处理从8个重复笼中随机抽取1只鸡进行取样。结果表明，BS和YCW对鸟类器官发育和先天免疫的影响不同。添加YCW提高了蛋鸡胸腺指数和血清IgM浓度（p p p p p p p）
期刊介绍：
Frontiers in Veterinary Science is a global, peer-reviewed, Open Access journal that bridges animal and human health, brings a comparative approach to medical and surgical challenges, and advances innovative biotechnology and therapy.
Veterinary research today is interdisciplinary, collaborative, and socially relevant, transforming how we understand and investigate animal health and disease. Fundamental research in emerging infectious diseases, predictive genomics, stem cell therapy, and translational modelling is grounded within the integrative social context of public and environmental health, wildlife conservation, novel biomarkers, societal well-being, and cutting-edge clinical practice and specialization. Frontiers in Veterinary Science brings a 21st-century approach—networked, collaborative, and Open Access—to communicate this progress and innovation to both the specialist and to the wider audience of readers in the field.
Frontiers in Veterinary Science publishes articles on outstanding discoveries across a wide spectrum of translational, foundational, and clinical research. The journal''s mission is to bring all relevant veterinary sciences together on a single platform with the goal of improving animal and human health.
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