• Food Science of Animal Resources
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• v.21 no.4
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• pp.358-366
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• 2001

To investigate the compositions of Holstein colostrums, samples were collected at 12 hour-interval after 12hrs postpartum. Milk protein, milk fat, SNF and total solid content of the colostum rapidly decreased from 12 hours to 48 hours after calving whereas lactose was the lowest at 12 hours after calving. Ash content was not shown to changes during lactation periods. Immunoglobulin G(IgG) concentration was also significantly(p<0.05) high in both primiparous and multiparous colostrum collected at 12 and 24 hours after calving. IgG concentration of primiparous and multiparous colostrums at 12 hours after calving was 44mg/ml and 44.27mg/ml, respectively. There was no apparent difference in IgG level between primipara and multipara. Fatty acid composition of colostral lipid was not shown to changes during lactation period. However, lauric acid, myristic acid and total saturated, fatty acid were slightly decreased in multiparous colostral lipid. Capric acid, myristic acid and palmitoleic acid composition in primiparous colostral lipid were slightly higher than those of multiparous colostral lipid throughout all lactation periods.