Kirchgessner M, Neesse K R
Z Lebensm Unters Forsch. 1976;161(1):1-6. doi: 10.1007/BF01145412.
In a comparative slaughter experiment the copper, manganese and zinc contents in different organ and tissue samples of veal calves at different weights were determined by whole body analyses. For all three trace elements, a decrease of their concentration with increasing age could be observed in the individual parts (blood, adipose tissue, innards, meat, bones) and in the whole body. During the fattening period of 12 weeks the concentrations in the dry matter of the whole body decreased from 12 ppm to 5 ppm copper (P less than 0.001), from 3.5 ppm to 1.6 ppm manganese (P less than 0.05) and from 127 ppm to 69 ppm zinc (P less than 0.05). In the present experiment the animals retained an average of 20 to 22% of the copper intake and about 20% of the manganese intake over the entire feeding period. Zinc was utilized at the extent of 40 to 43%. For the edible parts of the whole body the following coefficients of utilization were obtained: Cu = 10%, Mn = 7%, Zn = 30%.
在一项比较屠宰实验中，通过对不同体重的犊牛进行全身分析，测定了其不同器官和组织样本中的铜、锰和锌含量。对于所有这三种微量元素，在各个部分（血液、脂肪组织、内脏、肌肉、骨骼）以及全身中，都可以观察到其浓度随着年龄增长而降低。在12周的育肥期内，全身干物质中的浓度，铜从12 ppm降至5 ppm（P小于0.001），锰从3.5 ppm降至1.6 ppm（P小于0.05），锌从127 ppm降至69 ppm（P小于0.05）。在本实验中，动物在整个饲养期内平均保留了20%至22%的铜摄入量以及约20%的锰摄入量。锌的利用率为40%至43%。对于全身的可食用部分，得到了以下利用率系数：铜=10%，锰=7%，锌=30%。
