Dairy cows often suffer metabolic disorders due to the challenges of the transition period. The aim of study was to determine the effects of feeding pomegranate by‐product silage (PBS) on feed intake and some blood parameters, such as non‐esterified fatty acids (NEFA) and beta hydroxy butyric acid (BHBA), interleukin‐1 (IL‐1), serum amyloid‐A (SAA), prostaglandin F_2α metabolites (PGFM), and progesterone (P4) in fresh Holstein cows. The experimental groups were as follows: CON (0 g PBS of DM) and PBS (120 g PBS of DM). Results showed that replacing corn silage with PBS had no effect on dry matter intake (DMI) throughout the study. The CON group had highest (p < .05) NEFA at 14 d postpartum and serum BHBA was decreased by feeding PBS, especially on days 21 (p < .05) and 28 (p < .05) and the entire study (p < .01). Cows fed PBS had lower (p < .05) serum Malondialdehyde (MDA) than CON cows at different times. Feeding PBS decreased (p < .01) serum IL‐1 compared to CON group (216.7 versus. 515.5 Pg/ml) at 28 d postpartum, and also cows fed 120 g PBS had higher (p < .01) serum P4. It was concluded that feeding PBS had no adverse effect on feed intake, milk production, and some reproductive parameters. Moreover, PBS positively affected serum metabolites in fresh dairy cows.

中文翻译：

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石榴副产品青贮饲料对荷斯坦奶牛采食量、血液代谢物、炎症反应和前列腺素 F2α 代谢物的影响

由于过渡期的挑战，奶牛经常出现代谢紊乱。研究的目的是确定饲喂石榴副产品青贮饲料 (PBS) 对采食量和一些血液参数的影响，例如非酯化脂肪酸 (NEFA) 和 β 羟基丁酸 (BHBA)、白细胞介素 1 ( IL-1)、血清淀粉样蛋白-A (SAA)、前列腺素 F _2α代谢物 (PGFM) 和新鲜荷斯坦奶牛的孕酮 (P4)。实验组如下：CON（0 g PBS of DM）和 PBS（120 g PBS of DM）。结果表明，在整个研究过程中，用 PBS 代替玉米青贮饲料对干物质摄入量 (DMI) 没有影响。CON 组在产后 14 天具有最高 ( p  < .05) NEFA，并且通过喂养 PBS 降低了血清 BHBA，尤其是在第 21 天时 ( p < .05) 和 28 ( p  < .05) 以及整个研究 ( p  < .01)。 在不同时间，饲喂 PBS 的奶牛血清丙二醛 (MDA)低于 CON 奶牛 ( p < .05)。 与 CON 组（216.7 对 515.5 Pg/ml）相比，在产后 28 天饲喂 PBS 的奶牛血清 IL-1 降低 ( p < .01)，并且饲喂 120 g PBS 的奶牛血清 P4 含量更高 ( p  < .01)。得出的结论是，饲喂 PBS 对采食量、产奶量和一些繁殖参数没有不利影响。此外，PBS 对新鲜奶牛的血清代谢物有积极影响。