These minerals are so named because they are required in minute or trace amounts. I shows the average trace mineral content in some common Alberta grown feedstuffs. The majority of the forages we grow do not contain enough copper, zinc, selenium or manganese to meet the requirements of beef cattle. Trace elements of most concern in Alberta Essential trace elements are necessary for the well being of the animal. These are needed in sufficient quantities to promote health and to optimize production and reproduction.
All trace elements are toxic when fed in excessive quantities.
Table 2 is a summary of suggested minimum target levels for dietary trace minerals. The levels are approximations, as requirements are affected by many factors. Copper More than 90 percent of the feed produced in Alberta is low in copper. Cases of copper deficiency are common. Symptoms of deficiency include anaemia, impaired reproduction in cows, bleaching of the hair coat, scours, unthriftiness, stunted growth and sudden death.