Institute of Animal Nutrition, Sichuan Agricultural University, Key Laboratory of Animal Disease-resistant Nutrition, Ministry of Education, Key Laboratory of Animal Disease-resistant Nutrition, Chengdu, Sichuan Province 611130, China.
Institute of Animal Nutrition, Sichuan Agricultural University, Key Laboratory of Animal Disease-resistant Nutrition, Ministry of Education, Key Laboratory of Animal Disease-resistant Nutrition, Chengdu, Sichuan Province 611130, China.
Poult Sci. 2022 Sep;101(9):102020. doi: 10.1016/j.psj.2022.102020. Epub 2022 Jun 22.
This study determined the effects of coated sodium butyrate (CSB) on production performance, egg quality, nutrient digestibility, and intestinal health of laying hens. We divided a total of 800 Lohmann laying hens, aged 51 wk, into 4 treatment groups: 0 (CON), 300 (CSB1), 500 (CSB2), and 800 (CSB3) mg/kg of CSB. Each group comprised 20 birds, with 10 replicates set. A 12-wk monitoring process was conducted for each laying hen. Compared to CON, dietary supplementation of CSB did not affect the average daily feed intake or the egg weight. The CSB3 group demonstrated a linear increase in the production performance (P < 0.05), with decreased feed conversion ratio (P < 0.05). CSB2 and CSB3 exhibited markedly elevated egg mass (P < 0.05). The CSB supplementation markedly enhanced the yolk color (P < 0.05). CSB1 improved the digestibility of dry matter (P = 0.029). No significant differences were observed among dietary treatments in the duodenal morphology (P > 0.05). The three dosages of CSB reduced the crypt depth (P < 0.05) in the jejunum, whereas CSB3 exhibited an increase in the villus height (VH; P = 0.048). The CSB3 group showed a markedly elevated ileal VH (P = 0.011). CSB supplementation significantly increased the butyric acid content in the cecum (P = 0.009). The hens fed on the 800 mg/kg CSB diet showed a significant increase (P = 0.029) in butyric acid content in the ileum. The CSB3 group showed an elevation in microbial diversity (P < 0.05). Additionally, at the phylum level, the CSB3 increased the enrichment of Bacteroidetes, the CSB2 increased Firmicutes, and the abundance of Deferribacteres was increased in CSB2 and CSB3 groups (P < 0.05). An enrichment of Muribaculaceae (family) was observed in the CSB3 group. In conclusion, dietary supplementation of CSB improved production, yolk color, intestinal morphology, butyrate content, and microbial composition in laying hens.
本研究旨在探讨包被丁酸钠（CSB）对产蛋鸡生产性能、蛋品质、养分消化率和肠道健康的影响。我们将 800 只 51 周龄的洛曼产蛋鸡分为 4 个处理组：0（CON）、300（CSB1）、500（CSB2）和 800（CSB3）mg/kg 的 CSB。每个处理组包含 20 只鸡，设置 10 个重复。对每只产蛋鸡进行了 12 周的监测。与 CON 相比，日粮添加 CSB 并未影响平均日采食量或蛋重。CSB3 组的生产性能呈线性增加（P<0.05），饲料转化率降低（P<0.05）。CSB2 和 CSB3 组的蛋重显著增加（P<0.05）。CSB 补充显著提高了蛋黄颜色（P<0.05）。CSB1 提高了干物质消化率（P=0.029）。不同日粮处理组十二指肠形态无显著差异（P>0.05）。CSB 三种剂量降低了空肠隐窝深度（P<0.05），而 CSB3 组绒毛高度（VH）增加（P=0.048）。CSB3 组回肠 VH 显著升高（P=0.011）。CSB 补充显著增加了盲肠丁酸含量（P=0.009）。饲喂 800mg/kg CSB 日粮的母鸡回肠丁酸含量显著增加（P=0.029）。CSB3 组微生物多样性增加（P<0.05）。此外，在门水平上，CSB3 增加了拟杆菌门的丰度，CSB2 增加了厚壁菌门的丰度，CSB2 和 CSB3 组脱硫弧菌门的丰度增加（P<0.05）。CSB3 组 Muribaculaceae（科）丰度增加。综上所述，日粮添加 CSB 可提高产蛋鸡的生产性能、蛋黄颜色、肠道形态、丁酸含量和微生物组成。
