Relative Rates of Secretion of Various Milk Constituents

Chemical analyses of 543 samples of milk of individual cows of various breeds published in Minnesota Bulletin 140 are analysed statistically. The results are interpreted physiologically as showing the relative ratios of secretion of the several constituents at a constant level of activity of the mam...

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Bibliographic Details
Published in:Journal of dairy science 1925-11, Vol.8 (6), p.486-496
Main Author: Gaines, W.L.
Format: Article
Language:English
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Summary:Chemical analyses of 543 samples of milk of individual cows of various breeds published in Minnesota Bulletin 140 are analysed statistically. The results are interpreted physiologically as showing the relative ratios of secretion of the several constituents at a constant level of activity of the mammary gland. The secretion of fat and protein appear to be intimately related; rfp = 0.812±0.010. The secretion of water and the secretion of fat or protein are largely independent on the basis that entire independence would result in a high negative coefficient of correlation;rwf=−0.966±0.002and rwp=−0.885±0.006The equation for protein per cent (p) based on fat per cent (f) is p = (1.46 + 0.40f)±0.19. This relation appears to hold very closely also between several species, covering a range of fat percentage from 0.36 to 22.46.
ISSN:0022-0302
1525-3198
DOI:10.3168/jds.S0022-0302(25)93980-X