Roland D A, Marple D N, Brewer R N, Teer P A, Hoerr F J
Poult Sci. 1983 May;62(5):917-22. doi: 10.3382/ps.0620917.
Three experiments were conducted to determine possible differences in serum progesterone, enzymes, and electrolytes between hens laying a high or low incidence of shell-less (SL) eggs. Blood was taken at time of oviposition and at 6, 12, 18, and 25 hr later, irrespective of the stage of the sequence. The results indicated no significant differences in average serum progesterone between hens laying a high or low incidence of SL eggs. In general, the patterns of serum progesterone in relation to time of oviposition was similar for each type. No significant differences were observed in serum phosphorus, magnesium, glutamate pyruvate transaminase, or alkaline phosphatase between hens laying a high or low incidence of SL eggs. It was concluded that the production of SL eggs is not related to abnormal serum progesterone, alkaline phosphatase, glutamate pyruvate transaminase, magnesium, or phosphorus levels.
进行了三项实验，以确定产无壳（SL）蛋发生率高或低的母鸡之间血清孕酮、酶和电解质的可能差异。无论处于产蛋序列的哪个阶段，在排卵时以及排卵后6、12、18和25小时采集血液。结果表明，产SL蛋发生率高或低的母鸡之间平均血清孕酮没有显著差异。一般来说，每种类型的母鸡血清孕酮与排卵时间的关系模式相似。产SL蛋发生率高或低的母鸡之间血清磷、镁、谷丙转氨酶或碱性磷酸酶没有观察到显著差异。得出的结论是，SL蛋的产生与血清孕酮、碱性磷酸酶、谷丙转氨酶、镁或磷水平异常无关。
