Miller E R, Wilson H R, Harms R H
Poult Sci. 1978 Jan;57(1):242-5. doi: 10.3382/ps.0570242.
The effect of production status on the serum levels of calcium and phosphorous of laying hens was examined. Commercial-type White Leghorn hens, 66 weeks of age, were selected on the basis of whether or not they had laid an egg each day during a two-day period. A five ml. blood sample was collected via anterior heart puncture from each of the selected hens and subjected to serum calcium and phosphorus analyses. Serum phosphorus varied significantly in relation to whether or not a bird laid an egg the day before and/or the day of blood collection. Except for birds which were reproductively inactive, serum calcium was less affected by production status than was serum phosphorus. It was hypothesized that the variations were related to the physiological changes in shell calcification activity, bone resorption and remineralization, intestinal absorption of minerals and muscular activity. It was suggested from the results that birds selected for serum mineral analyses should be of similar production status.
研究了产蛋状态对蛋鸡血清钙和磷水平的影响。选择66周龄的商品型白来航蛋鸡，依据其在两天内是否每天产蛋进行挑选。从每只挑选出的母鸡通过心脏穿刺采集5毫升血样，并进行血清钙和磷分析。血清磷水平与采血前一天和/或采血当天母鸡是否产蛋显著相关。除了生殖不活跃的母鸡外，血清钙受产蛋状态的影响小于血清磷。据推测，这些变化与蛋壳钙化活性、骨吸收和再矿化、矿物质的肠道吸收以及肌肉活动的生理变化有关。结果表明，用于血清矿物质分析所挑选的母鸡应具有相似的产蛋状态。
