Factors affecting milk calcium and phosphorus content
2002
Kuebarsepp, I. | Henno, M. | Kaert, O. (Estonian Agricultural Univ., Tartu (Estonia))
The purpose of this study to compare milk calcium and phosphorus content of different breeds raised in Estonia. Based on obtained results, different factors and their magnitude of influence on the contents of calcium and phosphorus in milk were studied. On Polula Research Farm five trial groups were made up: Estonian Holstein breed (breeding value 115) (EHF-t), Estonian Holstein breed (breeding value 105...115) (EHF), Red-and-White Holstein breed (RHF), Estonian Red breed (EPK) and Estonian Native breed (EK). Milk samples were collected from five of each trial group twice a month during the year 2001. Calcium and phosphorus contents were determined by using IDF methods 36A:1992 and 42B:1990 in Dairy Laboratory of the Institute of Animal Science.
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