Petrie L, Acres S D, McCartney D H
Can Vet J. 1984 Jul;25(7):273-9.
The details of a small study on the volume of colostrum and colostral gammaglobulins produced by beef cows at the first milking immediately after calving and the serum concentrations of passively acquired colostral gammaglobulins attained by beef calves are reported. The mean volume of colostrum and colostral gammaglobulins produced were 2990 +/- 2100 (SD) mL and 314.75 +/- 211.8 (SD) g respectively. The mean serum concentrations of passively acquired colostral gammaglobulins were 29.9 +/- 10.1 (SD) ZST units (n = 40, Ranch A) and 19.2 +/- 7.5 (SD) ZST units (n = 42, Ranch B). The main reason for this difference appeared to be nutritional; the cows on ranch B being in much poorer condition and almost certainly producing less colostrum than those on ranch A.
本文报告了一项小型研究的细节，该研究涉及肉牛产后首次挤奶时初乳的产量、初乳中γ-球蛋白的含量，以及肉牛犊通过被动获取初乳γ-球蛋白后血清中的浓度。初乳的平均产量和初乳中γ-球蛋白的平均含量分别为2990±2100（标准差）毫升和314.75±211.8（标准差）克。被动获取的初乳γ-球蛋白的血清平均浓度在牧场A为29.9±10.1（标准差）ZST单位（n = 40），在牧场B为19.2±7.5（标准差）ZST单位（n = 42）。造成这种差异的主要原因似乎是营养方面的；牧场B的奶牛状况要差得多，几乎可以肯定其初乳产量比牧场A的奶牛少。
