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首页> 外文期刊>Czech Journal of Animal Science >Effects of dietary microalgae (Schizochytrium spp.) supplement on milk performance, blood parameters, and milk fatty acid composition in dairy cows
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Effects of dietary microalgae (Schizochytrium spp.) supplement on milk performance, blood parameters, and milk fatty acid composition in dairy cows

机译：膳食微藻（Schizochytrium SPP。）对奶牛牛奶，血液参数和牛奶脂肪酸组成的影响

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摘要

The objective of this study was to examine the effects of dietary inclusion of microalgae (Schizochytrium spp.) on milk yield, milk composition, and docosahexaenoic acid (DHA) transfer efficiency in dairy cows. Thirty-six lactating Chinese-Holstein dairy cows were randomly allocated to three treatment groups (n = 12; 0, 170, and 255 g microalgae supplement per day) in a 60-day experimental period. No significant treatment effect was observed on DMI and milk performance. Similarly, there was no significant microalgae supplement effect on blood haematological and biochemical parameters, except for platelets (P < 0.01) and thrombocytosis (P < 0.01), suggesting that the inclusion of microalgae in dairy cow diets would not affect production performance and animal health. Compared to the control group, adding 170 and 255 g microalgae to diets significantly increased the proportion of linoleic acid, DHA, n-3 and n-3/n-6 ratio in the blood (P < 0.05). Consequently, DHA concentration and n-3/n-6 ratio were increased in milk, indicating that the milk fatty acid composition could be affected by nutritional manipulation. The overall DHA transfer efficiency was 10.1% and 11.3% for 170 and 255 g microalgae supplement, suggesting that the addition of microalgae to dairy cow diets is a feasible strategy to produce DHA enriched milk in practice.
机译：本研究的目的是检测微藻（Schizochytrious SPP。）对奶牛产量，牛奶组合物和十二年六六烯酸（DHA）转移效率在奶牛的牛奶产量，牛奶组合物和二十二年六六烯酸（DHA）的影响。在60天的实验期间，三十六个哺乳期中荷兰乳酪奶牛被随机分配给三个治疗组（n = 12; 0,170和每天255g微藻补充剂）。在DMI和牛奶性能上没有观察到显着的治疗效果。同样，除了血小板（P <0.01）和血小板减少（P <0.01）外，没有显着的微藻补充效果和生化参数（P <0.01），表明在乳制品牛饮食中包含微藻不会影响生产性能和动物健康。与对照组相比，添加170和255g微藻以饮食显着增加了血液中亚油酸，DHA，N-3和N-3 / N-6比的比例（P <0.05）。因此，DHA浓度和N-3 / N-6比在牛奶中增加，表明乳脂肪酸组合物可能受营养操纵的影响。 170和255g微藻的总体DHA转移效率为10.1％和11.3％，表明将微藻添加到乳制品牛饮食中是一种可行的策略，在实践中生产DHA富含牛奶。

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