Barbato Olimpia, Holmes Belinda, Filipescu Iulia-Elena, Celi Pietro
Dipartimento di Medicina Veterinaria, Università degli Studi di Perugia, Perugia 06123, Italy.
Faculty of Veterinary Science, University of Sydney, Narellan, NSW 2567, Australia.
Antioxidants (Basel). 2019 Feb 9;8(2):38. doi: 10.3390/antiox8020038.
Thirty-six pregnant Holstein⁻Friesian cows were used to study the effect of Yerba Mate (YM) supplementation during the dry period on redox balance. The treatments groups were Control (no YM), YM 250 (250 g/cow/day), and YM 500 (500 g/cow/day). Blood samples were obtained 30 days prepartum, at calving, and monthly postpartum until four months post calving. Liveweight (LW) and body condition score (BCS) were assessed prepartum, at calving, and then postpartum monthly until the end of the trial. Plasma was analyzed for hydroperoxides (d-ROMs), advanced oxidation protein products (AOPP), and biological antioxidant potential (BAP). The oxidative stress index (OSI) was calculated as OSI = ROMs/BAP × 100. Cows were milked twice daily, and milk yield data were recorded daily. Redox balance was improved by YM supplementation, as reflected in the lower OSI values observed in the YM groups. Yerba Mate supplementation significantly affected LW, but did not affect BCS. Milk yield averaged 28.1 ± 0.40, 29.0 ± 0.48, and 29.9 ± 0.46 L/cow/day in the Control, YM 250, and YM 500 groups, respectively, but was not significant. Nutritional manipulation during the dry period with Yerba Mate has demonstrated the potential to improve redox balance and milk yield.
选用36头怀孕的荷斯坦 - 弗里生奶牛，研究干奶期补充马黛茶（YM）对氧化还原平衡的影响。处理组分别为对照组（不补充YM）、YM 250组（250克/头/天）和YM 500组（500克/头/天）。在产前30天、产犊时以及产后每月直至产后四个月采集血样。在产前、产犊时以及产后每月直至试验结束评估活重（LW）和体况评分（BCS）。分析血浆中的氢过氧化物（d-ROMs）、晚期氧化蛋白产物（AOPP）和生物抗氧化潜力（BAP）。氧化应激指数（OSI）计算为OSI = ROMs/BAP×100。奶牛每天挤奶两次，每天记录产奶量数据。补充YM改善了氧化还原平衡，这体现在YM组观察到的较低OSI值上。补充马黛茶显著影响LW，但不影响BCS。对照组、YM 250组和YM 500组的平均产奶量分别为28.1±0.40、29.0±0.48和29.9±0.46升/头/天，但差异不显著。干奶期用马黛茶进行营养调控已证明有改善氧化还原平衡和产奶量的潜力。
