Optimising dairy performance while minimising environmental impact
Dairy cows require at least 15 different minerals and vitamins to avoid mineral deficiencies in cattle and to maintain good health and productivity (see Figure 1). The mineral and vitamin requirements of dairy cattle depend on various factors, including genetic potential, production levels, milk yield, pregnancy status, lactation stage, and the composition of the diet.
Deficiencies of trace minerals for cattle can have a serious impact lactational performance, health, and reproduction of dairy cows. Oversupplying dairy cows with trace minerals on the other hand, can lead to:
- Increased feed costs
- Trace mineral toxicity in cattle
- Increased reactivity towards vitamins in premixes, supplements and in a TMR
- Antagonist effects with other minerals
- Decreased dairy performance
- Trace mineral ions being excreted into the environment, leading to trace mineral soil contamination