Manuelian Carmen L, Maggiolino Aristide, De Marchi Massimo, Claps Salvatore, Esposito Luigi, Rufrano Domenico, Casalino Elisabetta, Tateo Alessandra, Neglia Gianluca, De Palo Pasquale
Department of Agronomy, Food, Natural Resources, Animals and Environment, University of Padova, Viale dell'Università 16, 35020 Legnaro, Italy.
Department of Veterinary Medicine, University of Bari Aldo Moro, Casamassima km 3, 70010 Valenzano, Italy.
Animals (Basel). 2020 Mar 4;10(3):432. doi: 10.3390/ani10030432.
This study aimed to describe metabolic, oxidative, and mineral blood profiles of Saanen does through lactation compared with Mediterranean breed clusters (Maltese and Rossa Mediterranea, and Jonica, Garganica, and Girgentana). Milk and blood samples of 57 dairy goats (9-10 goats per breed) were collected from the 2nd to the 30th week of lactation every 2-3 weeks. Saanen showed greater milk yield and somatic cell score, and lower fat and protein percentage through lactation ( < 0.05) than the Mediterranean breed clusters. Blood analysis revealed that stage of lactation had a greater impact than breed cluster, except for uric acid, alkaline phosphatase, and aspartate aminotransferase. Plasmatic non-esterified fatty acids indicated a greater negative energy balance in Saanen than the other breed clusters during early and medium lactation stages ( < 0.05). Serum Cl, Mg, and Ca increased in all the breed clusters from early to the following stages of lactation ( < 0.05). No significant prooxidant/antioxidant imbalances were detected in any of the three clusters during the entire lactation. In conclusion, Mediterranean breeds tended to recover earlier from negative energy balance than Saanen, but effects of breed or stage of lactation on long-term oxidative stress indicators were not evident.
本研究旨在描述萨能奶山羊在整个泌乳期的代谢、氧化和矿物质血液指标，并与地中海品种集群（马耳他山羊、地中海红山羊、约尼卡山羊、加尔加尼卡山羊和吉尔根塔纳山羊）进行比较。在泌乳期的第2周到第30周，每2 - 3周采集57只奶山羊（每个品种9 - 10只）的牛奶和血液样本。萨能奶山羊在整个泌乳期的产奶量和体细胞评分较高，而脂肪和蛋白质百分比较低（<0.05），与地中海品种集群相比。血液分析表明，除尿酸、碱性磷酸酶和天冬氨酸转氨酶外，泌乳阶段比品种集群对血液指标的影响更大。血浆非酯化脂肪酸表明，在泌乳早期和中期，萨能奶山羊的负能量平衡比其他品种集群更大（<0.05）。在所有品种集群中，血清氯、镁和钙从泌乳早期到下一阶段均升高（<0.05）。在整个泌乳期，三个品种集群中均未检测到明显的促氧化剂/抗氧化剂失衡。总之，地中海品种比萨能奶山羊更容易从负能量平衡中恢复，但品种或泌乳阶段对长期氧化应激指标的影响并不明显。
