Dietary Mineral Requirements and Maximum Tolerable Amounts for Most Classes of Beef Cattle
Mineral | Unitsa | Requirementb,c | Maximum Tolerable Amountb |
|---|---|---|---|
Calcium | % | 0.40–1.00 | Not established |
Phosphorus | % | 0.20–0.40 | Not established |
Magnesium | % | 0.10–0.20 | 0.40 |
Potassium | % | 0.60–0.70 | 2.00 |
Sulfur | % | 0.15 | 0.30–0.50 |
Sodium | % | 0.06–0.10 | Not established |
Copper | ppm or mg/kg | 10 | 40 |
Zinc | ppm or mg/kg | 30 | 500 |
Manganese | ppm or mg/kg | 20–40 | 1,000 |
Selenium | ppm or mg/kg | 0.10 | 5 |
Iron | ppm or mg/kg | 50 | 500 |
Cobalt | ppm or mg/kg | 0.15 | 25 |
Iodine | ppm or mg/kg | 0.5 | 50 |
aExpressed in terms of total dietary dry matter. bValues adapted from the National Academies of Sciences, Engineering, and Medicine. Nutrient Requirements of Beef Cattle. 8th rev. ed. National Academies Press; 216. cCalcium and phosphorus requirements are highly dependent on body weight, as well as stage and level of production. The values in this table represent ranges that are expected to meet the calcium and phosphorus requirements of most beef cattle under most production scenarios. The requirements of young, rapidly growing calves (< 500 pounds [< 227 kg]) are greater than the values reported in this table; however, they are typically met through the dam’s milk. | |||