Abstract The study aimed to assess the effects of dietary extruded linseed (ELS) and Lactobacillus acidophilus (LA) on performance, carcass traits, immune organ weights, plasma lipoprotein response, and caecal bacteria populations in broiler chickens. A total of 648 one-day-old chicks were divided into six groups in a 3 × 2 factorial arrangement consisting of three ELS levels (0, 6 and 12%) without or with probiotic L. acidophilus (0 and 20 g ton−1 feed). Each group had six replicates (18 birds/pen). Results showed no significant effects of ELS level nor LA supplementation on growth performance (body weight gain, feed intake, and feed conversion) of broilers during the overall period (1–42 days). The production efficiency factor increases (p = .045) with the LA addition. There were no effects of ELS level nor probiotic addition on carcase traits and immune organ weights, except for decreases in abdominal fat percentage (p = .027, respectively p = .035). The dietary ELS level significantly correlated with a decrease in the plasma total cholesterol (TC; p = .003), triglycerides, and very-low-density lipoprotein concentrations (p = .020), while the LA addition significantly correlated with a decrease (p = .015) in the plasma TC. The LA addition lowers the caecal pH (p = .007), Staphylococcus spp. and E. coli counts (p < .0001), and increase the caecal Lactobacillus spp. and lactobacilli: E. coli ratio (p < .0001). In conclusion, the use of ELS up to 12% supplemented with L. acidophilus in broiler chicks diet had a positive effect on health status, decreasing the abdominal fat deposition, plasma lipids and the caecal pathogen bacteria E. coli. Highlights Extruded linseed up to 12% in broiler chicks’ diets had no significant effects on growth performance, carcass traits or immune organs size and improve the abdominal fat deposition and plasma lipids response due to the decreased dietary n − 6: n − 3 PUFA ratio. Extruded linseed up to 12% supplemented with L. acidophilus in broiler chicks diet had a positive effect on health status improving production efficiency factor and decreasing abdominal fat deposition, the plasma lipids and the caeca pathogen bacteria E. coli.

中文翻译：

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日粮挤压亚麻籽和嗜酸乳杆菌对肉仔鸡生长性能、胴体性状、血浆脂蛋白反应和盲肠细菌种群的影响

摘要 本研究旨在评估日粮挤压亚麻籽 (ELS) 和嗜酸乳杆菌 (LA) 对肉鸡生产性能、胴体性状、免疫器官重量、血浆脂蛋白反应和盲肠细菌种群的影响。总共 648 只一天大的小鸡以 3 × 2 的因子排列方式分为六组，由三个 ELS 水平（0、6 和 12%）组成，没有或有益生菌 L. acidophilus（0 和 20 克吨-1喂养）。每组有六个重复（18 只鸟/围栏）。结果表明，在整个时期（1-42 天），ELS 水平和 LA 补充剂对肉鸡的生长性能（体重增加、采食量和饲料转化率）没有显着影响。生产效率因子随着 LA 的增加而增加 (p = .045)。除了腹部脂肪百分比降低（分别为 p = .027 和 p = .035）外，ELS 水平或益生菌添加对胴体性状和免疫器官重量没有影响。膳食 ELS 水平与血浆总胆固醇 (TC; p = .003)、甘油三酯和极低密度脂蛋白浓度 (p = .020) 的降低显着相关，而添加 LA 与降低显着相关（ p = .015) 在等离子体 TC 中。添加 LA 降低了盲肠 pH 值 (p = .007)，葡萄球菌属。和大肠杆菌计数 (p < .0001)，并增加盲肠乳杆菌属。和乳酸杆菌：大肠杆菌比率（p < .0001）。总之，在肉鸡日粮中使用高达 12% 的 ELS 补充嗜酸乳杆菌对健康状况有积极影响，减少腹部脂肪沉积，血浆脂质和盲肠病原体细菌大肠杆菌。亮点 肉鸡日粮中高达 12% 的挤压亚麻籽对生长性能、胴体性状或免疫器官大小没有显着影响，并且由于日粮 n − 6: n − 3 PUFA 比率降低而改善腹部脂肪沉积和血脂反应. 在肉鸡日粮中添加高达 12% 的挤压亚麻籽并添加嗜酸乳杆菌对健康状况有积极影响，可提高生产效率，减少腹部脂肪沉积、血脂和盲肠病原体大肠杆菌。由于日粮 n - 6: n - 3 PUFA 比率降低，胴体性状或免疫器官大小并改善腹部脂肪沉积和血浆脂质反应。在肉鸡日粮中添加高达 12% 的挤压亚麻籽并添加嗜酸乳杆菌对健康状况有积极影响，可提高生产效率，减少腹部脂肪沉积、血脂和盲肠病原体大肠杆菌。由于日粮 n - 6: n - 3 PUFA 比率降低，胴体性状或免疫器官大小可改善腹部脂肪沉积和血浆脂质反应。在肉鸡日粮中添加高达 12% 的挤压亚麻籽并添加嗜酸乳杆菌对健康状况有积极影响，可提高生产效率，减少腹部脂肪沉积、血脂和盲肠病原体大肠杆菌。