EN
The content of mineral components in the colostrum of landrace sows (pbz-23) at 24 hours since placenta expulsion and in milk at 7, 21 and 42 days of lactation was assessed. The level of Ca, Mg, Na, K, Cu, Fe and Zn was determined by the spectrophotometric method of atomic absorption and total phosphorus by the colorimetric method. The mean content of the minerals in sow’s milk was as follows: Ca — 2738.92 pg/ml, Mg — 184.73 pg/ml, P — 1683.80 pg/ml, Na — 316.19 pg/ml, К — 960.13 pg/ml, Cu — 1.2714 pg/ml, Fe — 7.418 pg/ml, Zn — 7.9203 pg/ml. The level of Ca, P and Mg increased with the consecutive days of lactation whereas the content of Na, K, Cu, Fe, and Zn was the highest in the colostrum collected 24 hours after placenta expulsion compared with those in milk taken in the later periods of lactation.