Microelement supplementation in dairy cows by mineral lick
2009
Krys, S.,Veterinarni a Farmaceuticka Univ., Brno (Czech Republic). Klinika Chorob Prezvykavcu | Lokajova, E.,Veterinarni a Farmaceuticka Univ., Brno (Czech Republic). Klinika Chorob Prezvykavcu | Podhorsky, A.,Veterinarni a Farmaceuticka Univ., Brno (Czech Republic). Klinika Chorob Prezvykavcu | Pavlata, L.,Veterinarni a Farmaceuticka Univ., Brno (Czech Republic). Klinika Chorob Prezvykavcu
The objective of this study was to evaluate the effect of mineral licks on the microelement composition of blood, colostrum and milk in dairy cows. Czech Fleckvieh cows had free access to mineral licks enhanced with organic forms of microelements (Se, Zn, Cu, Mn) for four to five weeks before parturition and 1 week after parturition. The use of mineral lick was very uneven, its total consumption oscillated between 0 to 250 g per animal per day. Lick feeding did not have any significant effect on the concentration of the monitored microelements in the blood, colostrum and milk. A slight increase in Se and Cu conc. in the blood of E cows was observed. The average Se conc. increased by 60 microg/L (Cu by 9 micromol/L) in E cows, whereas in C cows, it was only by 30 microg/L (Cu by 6 microg/L). Microelements conc. in colostrum after parturition dropped quickly. Significant drops were determined for Se, Cu and Zn on the first (for Mn on the second) day after parturition. Se conc. in the first colostrum was 5 times higher than in milk, Cu conc. 3 times higher, Zn conc. 4 times higher and Mn conc. 1.3 times higher.
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