Larson L L, Mabruck H S, Lowry S R
J Dairy Sci. 1980 Feb;63(2):283-9. doi: 10.3168/jds.S0022-0302(80)82926-2.
Blood samples were collected over 1 year from 115 postpartum Holstein cows to determine the relationship between blood composition and reproductive performance. Blood samples were collected from each cow at 14 to 21 days (sample 1) and 38 to 45 days (sample 2) postpartum. These samples were analyzed for packed cell volume, hemoglobin, total protein, calcium, phosphorus, magnesium, copper, zinc, and selenium. Blood composition varied little with lactation number and season, and relationships were not consistent for the two collection periods. Hemoglobin, packed cell volume, total protein and zinc were associated negatively and calcium and magnesium associated positively with at least one measure of milk yield. None of the blood components examined at the two collection periods had a consistent relationship to reproductive performance. The most important relationship was the positive relationship of selenium concentration at first collection period with services per conception and days open.
在1年多的时间里，从115头产后荷斯坦奶牛采集血样，以确定血液成分与繁殖性能之间的关系。在产后14至21天（样本1）和38至45天（样本2）从每头奶牛采集血样。对这些样本进行红细胞压积、血红蛋白、总蛋白、钙、磷、镁、铜、锌和硒的分析。血液成分随泌乳次数和季节变化不大，且两个采集期的关系不一致。血红蛋白、红细胞压积、总蛋白和锌与至少一项产奶量指标呈负相关，钙和镁与产奶量呈正相关。在两个采集期检测的血液成分中，没有一种与繁殖性能有一致的关系。最重要的关系是第一次采集期的硒浓度与每次受孕的配种次数和空怀天数呈正相关。
