Abstract The ewe’s colostrum is an essential food for newborns because it helps them to improve their immune system in addition to providing nutrients for a few days after birth. It also increases the survival of the newborn in the first weeks of life, given that the ovine has a higher mortality rate in the initial 15 days of life. The rate of mortality can be reduced by providing sufficient good-quality colostrum at the right time. This study aimed to evaluate whether energy nutrition and chromium supplementation, during pregnancy and lactation, can alter sheep health parameters, colostrum quality parameters, birth and weaning weights, and mortality rate until lamb weaning time. Blood metabolites were analyzed to evaluate the influence of dietary energy on sheep health. The quality parameters of colostrum studied were immunoglobulin and antioxidants. The experiment was performed with 32 sheep, at the end of gestation (last 50 days) and lactation (60 days), in a completely randomized block design and distributed in three treatments: a diet with 2.24 Mcal of metabolizable energy (ME)/kg DM with corn starch (CTL), a diet with 2.46 Mcal of ME/kg DM with corn starch (ST), or a diet with 2.46 Mcal of ME/ kg DM with corn starch and chromium propionate (ST + Cr). Samples of blood and colostrum were collected before the parturition. There were no differences (P > 0.05) in dry matter intake (DMI), and blood levels of calcium, phosphorus, non-esterified fatty acids, β-hydroxybutyrate, and insulin. A difference was found for the blood glucose in which the CTL group had a lower (P 0.05) in the blood concentrations of total protein, immunoglobulin G and M, lysozyme, lactoperoxidase, ceruloplasmin, superoxide dismutase (SOD), ferric reducing ability of plasma (FRAP), oxygen radical absorbance capacity (ORAC), latent iron-binding capacity (LIBC), total iron-binding capacity (TIBC), iron, lactotransferrin, and the lactotransferrin saturation index. The ST+CR diet provided the highest level of glutathione peroxidase (P

中文翻译：

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高能量日粮添加铬的绵羊初乳成分

摘要 母羊的初乳是新生儿必不可少的食物，因为它不仅可以提供出生后几天的营养，还可以帮助它们提高免疫系统。鉴于绵羊在生命的最初 15 天内死亡率较高，它还可以提高新生儿在生命最初几周的存活率。在适当的时间提供足够的优质初乳可以降低死亡率。本研究旨在评估在怀孕和哺乳期间补充能量营养和铬是否可以改变绵羊健康参数、初乳质量参数、出生和断奶体重以及羔羊断奶前的死亡率。分析血液代谢物以评估日粮能量对绵羊健康的影响。研究的初乳质量参数是免疫球蛋白和抗氧化剂。该实验在 32 只绵羊中进行，在妊娠末期（最后 50 天）和哺乳期（60 天），采用完全随机的区组设计，并分布在三种处理中：2.24 Mcal 代谢能 (ME)/kg 的饮食含玉米淀粉 (CTL) 的 DM，含 2.46 Mcal ME/kg DM 含玉米淀粉 (ST) 的饮食，或含 2.46 Mcal ME/kg DM 含玉米淀粉和丙酸铬 (ST + Cr) 的饮食。在分娩前采集血液和初乳样品。干物质摄入量 (DMI) 和血钙、磷、非酯化脂肪酸、β-羟基丁酸和胰岛素水平没有差异 (P > 0.05)。发现 CTL 组较低的血糖存在差异（P 0. 05）血中总蛋白浓度、免疫球蛋白G和M、溶菌酶、乳过氧化物酶、铜蓝蛋白、超氧化物歧化酶（SOD）、血浆铁还原能力（FRAP）、氧自由基吸收能力（ORAC）、潜在铁结合能力（ LIBC)、总铁结合能力 (TIBC)、铁、乳转铁蛋白和乳转铁蛋白饱和指数。ST+CR 饮食提供最高水平的谷胱甘肽过氧化物酶（P