Effects of cage stocking density on the production performance, serum biochemistry, immune level, and intestinal morphology of 2 laying hen breeds
文献类型： 外文期刊
第一作者： Wan, Y.
作者： Wan, Y.;Guan, H.;Ma, R.;Qi, R.;Li, J.;Liu, W.;Li, Y.;Zhan, K.;Guan, H.;Wang, D.
作者机构：
关键词： chicken; breed; cage stocking density; production performance; intestinal morphology
期刊名称：JOURNAL OF APPLIED POULTRY RESEARCH （ 影响因子：1.9； 五年影响因子：1.8 ）
ISSN： 1056-6171
年卷期： 2023 年 32 卷 4 期
页码：
收录情况： SCI
摘要： This study aimed to determine the effects of different cage stocking densities on the production performance, serum biochemical indices, intestinal morphology and immune levels of Hy-Line Brown and Jinghong laying hens. A total of 432 Hy-Line Brown (n = 216) and Jinghong (n = 216) commercial laying hens were selected and randomly divided into 3 groups according to stocking density: high density (H, 4 birds/cage), medium density (M, 3 birds/cage) and low density (L, 2 birds/cage). In both breeds, the laying rates and Haugh units in the L group were significantly higher than those in the H group (P < 0.05), and the feed-to-egg ratio (feed conversion ratio [FCR]) in the L group was significantly lower than that in the H group (P < 0.05). Additionally, in both breeds, serum triglyceride (TG) activities and corticosterone (CORT) concentrations in the L group were significantly lower than those in the H group. The duodenal villus-to-crypt ratio (VCR) in the L group was significantly higher than that in the H group in both breeds. There were significant interaction effects of breed and stocking density on the laying rate, FCR, Haugh (VH), duodenal VCR and cecal VCR (P < 0.05). Overall, the results of this study indicate that a low stocking density increases the production performance and increases the intestinal mucosal barrier function of laying hens compared to a high stocking density.
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