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首页> 外文期刊>Tropical Animal Health and Production >Colostrum quality, IgG absorption and daily weight gain of calves in small-scale dairy production systems in Southern Vietnam
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Colostrum quality, IgG absorption and daily weight gain of calves in small-scale dairy production systems in Southern Vietnam

机译：越南小规模乳制品生产系统中初级乳品生产系统中的初乳质量，IgG吸收和每日体重增加

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Dairy production is expanding rapidly in Vietnam, but still, the smallholder farms are most common. The aim of this study was therefore to get improved knowledge about colostrum quality in dairy cows, immunoglobulin G (IgG) absorption, daily weight gain in dairy calves and calf management in small-scale dairy production systems in Southern Vietnam. A field survey was conducted on 40 farms, with two calves on each farm being intensively studied. It was observed that newborn calves were separated from their dams immediately after birth and offered 2-4 L first colostrum within 4 h by bucket feeding. The first colostrum IgG level, fat and protein content were on average 35.6, 4.8 and 21.4%, respectively, and 91% of the cows produced colostrum of good quality (Brix value > 22%). The IgG level in serum of calves, measured as Brix value, was on average 9.3%. Colostrum in the samples studied was of quite high quality and on-farm observations showed that colostrum was offered on the first day of calf life, so passive transfer of immunity to the calves was high. In total, 10% of the calves had a Brix value for IgG in serum lower than 8.3%, indicating that those calves had suffered from failure of passive immune transfer (FPT). The daily weight gain of female and male calves was 0.75 and 0.54 kg, respectively. Serum IgG was positively correlated with colostrum protein (P = 0.002). Daily weight gain and diarrhoea was negatively correlated (P = 0.001).
机译：牛奶店生产正在越南迅速扩大，但仍然，小农场最常见。因此，本研究的目的是为了改善关于奶牛奶牛的初乳质量，免疫球蛋白G（IgG）吸收，乳制品牛犊和小牛管理中的每日体重增加，在越南小规模乳制品生产系统中获得了改进的知识。在40个农场进行了一个田间调查，每个农场都有两只小牛正在进行中学。观察到新生牛犊在出生后立即与其水坝分开，并通过铲斗进料在4小时内提供2-4升第一初乳。第一个初乳IgG水平，脂肪和蛋白质含量平均平均为35.6,4.8和21.4％，91％的奶牛产生良好质量的初乳（Brix值> 22％）。作为Brix值测量的小腿血清中的IgG水平平均为9.3％。研究中的样品中的初乳是相当高的品质和农场观察结果表明，在小牛寿命的第一天提供了初乳，因此对小牛的免疫力传递高。总共10％的小腿具有低于8.3％的IgG的Brix值，表明这些小牛遭受被动免疫转移（FPT）的失败。雌性和雄性小腿的每日体重增加分别为0.75和0.54千克。血清IgG与初乳蛋白呈正相关（P = 0.002）。每日体重增加和腹泻呈负相关（p = 0.001）。

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