Miltenburg G A, Wensing T, van Vliet J P, Schuijt G, van de Broek J, Breukink H J
Department of Large Animal Medicine and Nutrition, Veterinary Faculty, State University of Utrecht, The Netherlands.
J Dairy Sci. 1991 Sep;74(9):3086-94. doi: 10.3168/jds.S0022-0302(91)78494-4.
The effect of 100 ppm of Fe in milk replacer on some hematological and tissue Fe variables was studied during the first 7 wk of the fattening period in two groups of eight calves with low or high initial blood hemoglobin concentrations. Hemoglobin concentration in calves with initially low hemoglobin increased. It decreased in those with initially high hemoglobin, but the difference remained over the experimental period. Higher mean liver Fe concentration, in some cases extremely high, and lower mean total Fe-binding capacity were found throughout the experiment in the group with the initial high hemoglobin. Of all variables, only low muscle Fe concentrations were correlated linearly with plasma Fe. In another experiment, the relationship of some hematological and tissue Fe variables during late gestation (about 10 d prepartum), at calving in dams, and at delivery in calves was investigated. The calves showed markedly higher liver Fe concentrations at delivery than their dams just before delivery, but these liver Fe concentrations were not correlated between dam and calf. The hematological and tissue Fe variables showed a weak correlation between dams and calves during late gestation or at delivery. However, dams as well as calves were Fe-sufficient.
在育肥期的前7周，对两组各8头初始血血红蛋白浓度低或高的犊牛，研究了代乳料中100 ppm铁对一些血液学和组织铁变量的影响。初始血红蛋白低的犊牛血红蛋白浓度升高。初始血红蛋白高的犊牛血红蛋白浓度降低，但在整个实验期间差异仍然存在。在整个实验过程中，初始血红蛋白高的组平均肝脏铁浓度较高，在某些情况下极高，而平均总铁结合力较低。在所有变量中，只有低肌肉铁浓度与血浆铁呈线性相关。在另一项实验中，研究了妊娠后期（产前约10天）、母畜产犊时和犊牛出生时一些血液学和组织铁变量之间的关系。犊牛出生时肝脏铁浓度明显高于其母畜分娩前，但母畜和犊牛之间的这些肝脏铁浓度并无相关性。在妊娠后期或分娩时，母畜和犊牛的血液学和组织铁变量之间相关性较弱。然而，母畜和犊牛的铁含量都充足。
