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Jul 6 17 4:47 PM


Table 1. Macro mineral requirements and maximum tolerable levels for beef cattle.


Mineral Lactating Cows Dry Cows Growing Calves Maximum Tolerable Level


Calcium, % 0.31 0.18 0.58


Magnesium, % 0.10 0.12 0.20 0.40


Phosphorus, % 0.21 0.16 0.26


Potassium, % 0.60 0.60 0.70 3.0


Sodium, % 0.07 0.07 0.10


Sulfur, % 0.15 0.15 0.15 0.40


NRC, 1996. Adapted from NRC. Nutrient Requirements of Beef Cattle, Sixth Edition.




Table 2. Micromineral Requirements and Maximum Tolerable Levels for Beef Cattle.


Mineral Lactating Cows Dry Cows Growing Calves Maximum Tolerable Level


Chromium — — — 50.0


Cobalt, ppm 0.1 0.1 0.1 10.0


Copper, ppm 10.0 10.0 10. 100.0


Iodine, ppm 0.50 0.50 0.50 50.0


Iron, ppm 50.0 50.0 50.0 1000.0


Manganese, ppm 20.0 40.0 40.0 1000.0


Molybdenum, ppm 5.0


Nickel 50.0


Selenium, ppm 0.10 0.10 0.10 2.0


Zinc, ppm 30.0 30.0 30.0 500.0


NRC, 1996. Adapted from NRC. Nutrient Requirements of Beef Cattle, Sixth Edition.


Source: https://secure.caes.uga.edu/extension/publications/files/pdf/B%20895_4.PDF




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