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首页> 外文期刊>BMC Veterinary Research >Influence of two different feeding strategies in the dry period on dry matter intake and plasma protein peroxidative and antioxidative profile during dry period and early lactation
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Influence of two different feeding strategies in the dry period on dry matter intake and plasma protein peroxidative and antioxidative profile during dry period and early lactation

机译：两种不同喂养策略在干燥时期干燥时期干燥时期的影响干燥时期干燥时期和血浆蛋白过氧化谱和抗氧化型

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Dairy cows undergo dramatic changes in endocrine and metabolic status around parturition and in early lactation. Meeting the nutritional requirements of transition dairy cows is important for animal health, production and animal wellbeing. Dry cow feeding and managing play an essential role in this. The changes in metabolism of periparturient cows also lead to a rise in the production of oxidising agents, leading to oxidative stress. The relationship between dry cow diet composition and oxidative stress has received little research attention so far. In the present study, the influence of two different dry cow feedings (single diet with medium energy content over the whole dry period versus traditional two-phase diet with a low-energy “far-off” ration and a high energy “close-up” ration) on dry matter intake, energy intake and plasma protein peroxidative and antioxidative profile was investigated. The examined parameters revealed a dynamic profile within the experimental period. Dry matter intake (DMI) did not differ between groups. However, there was a time and a group x time interaction effect: Group 1 (“one-phase”) had a very constant DMI with a slow and even decrease until calving. In Group 2 (“two-phase”), an initial increase in DMI two weeks antepartum (a.p.) was followed by a sharp drop at week 1 a.p.. The highest total antioxidant capacity and sulfhydryl residue concentration was noted at partus. In contrast, concentration of formylokinurenine and bityrosine bridges as representatives of protein peroxidation were lowest at parturition. The time course of formylokinurenine and bityrosine bridges showed parallels to the DMI. The contents of sulfhydryl groups, formylokinurenine and total antixoxidant capacity did not differ between groups. In contrast, concentration of bityrosine bridges was always higher in Group 2 compared with Group 1 and these differences were statistically significant at week 3 a.p., week 2 a.p., week 1 a.p. and at parturition. The results of our study suggest time-related changes of pro- and antioxidative plasma parameters. Different dry cow feeding affected antepartal DMI. Furthermore, DMI and diet compositions seemed to have an influence on plasma protein peroxidative profile and activity of antioxidative defence.
机译：乳制品奶牛在分娩周围的内分泌和代谢地位和早期哺乳期间进行了巨大变化。满足过渡乳制品奶牛的营养需求对于动物健康，生产和动物健康很重要。干牛喂养和管理在这方面发挥重要作用。围羽牛的新陈代谢的变化也导致氧化剂的产生升高，导致氧化应激。到目前为止，干牛饮食成分与氧化应激之间的关系很少得到研究。在本研究中，两种不同的干牛喂养的影响（单饮食与中期能量含量超过整个干燥的时期与传统的两相饮食，低能量“远离”的配给和高能量“特写研究了干物质摄入，能量摄入和血浆蛋白过氧化和抗氧化曲线上的“配给”。检查参数显示了实验期内的动态型材。干物质摄入（DMI）在组之间没有差异。但是，有一个时间和X时间交互效果：第1组（“单相”）具有非常常数的DMI，慢速甚至降低，直到产犊。在第2组（“两相”）中，DMI初始增加了两周的胃窦（A.P.），然后在第1周的急剧下降。在PARTU时注意到最高总抗氧化能力和巯基残余物浓度。相比之下，甲状腺蛋白含量和双核苷酸桥的浓度作为蛋白质过氧化的代表在分娩中最低。甲型蛋白核和双核苷酸桥的时间过程显示了DMI的平相。巯基，甲酰基核素和总抗屈光剂容量的含量在基团之间没有差异。与此相反，bityrosine桥浓度在2组总是高于第1组进行比较，这些差异在每周3 A.P.，每周2 A.P.，周1个A.P.统计学显著和份额。我们的研究结果表明了具有抗氧化等离子体参数的时间相关变化。不同的干母牛喂养受影响的胃玺DMI。此外，DMI和饮食组合物似乎对血浆蛋白质过氧化型和抗氧化防御活性产生影响。

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