Safwate A, Davicco M J, Barlet J P, Delost P
Reprod Nutr Dev (1980). 1982;22(4):689-96. doi: 10.1051/rnd:19820510.
This paper describes a balance study, performed during the first 7 days of postnatal life on 10 male Holstein x Friesian calves born spontaneously at term. The relationship between sodium and potassium balances and plasma aldosterone levels were assessed during the postnatal period. The animals were put in metabolic cages immediately after birth for 7 days. Intakes of sodium and potassium and their plasma levels, as well as urinary and faecal excretion, were measured daily. Statistical (multiple regression) analysis of the results demonstrated that animal age accounted for 57 p. 100 of the variations observed in the plasma aldosterone levels. Neither intake nor faecal and urinary excretions of sodium and potassium were correlated with plasma aldosterone concentrations in newborn calves. The high plasma levels of this hormone at the time of birth might be a result of labor.
本文描述了一项平衡研究，该研究在10头足月自然出生的雄性荷斯坦×弗里生犊牛出生后的前7天进行。在产后期间评估了钠和钾平衡与血浆醛固酮水平之间的关系。动物出生后立即置于代谢笼中7天。每天测量钠和钾的摄入量及其血浆水平，以及尿液和粪便排泄量。结果的统计（多元回归）分析表明，动物年龄占血浆醛固酮水平观察到的变化的57%。新生犊牛钠和钾的摄入量、粪便和尿液排泄量均与血浆醛固酮浓度无关。出生时这种激素的高血浆水平可能是分娩的结果。
