Animal Sciences Commons^™

Effects Of Manipulating Protein And Phosphorus Nutrition Of Feedlot Cattle On Nutrient Management And The Environment, Terry J. Klopfenstein, Galen E. Erickson

Department of Animal Science: Faculty Publications

Feedlot nutrition will play a role in meeting challenges such as nutrient management. Nitrogen and phosphorus are two nutrients that are currently studied in this context. One nutritional method is formulating diets not to exceed requirements for nitrogen and phosphorus. Requirements are different for calves and yearlings. The requirements also change during the finishing period. Phosphorus requirements have not been extensively studied for feedlot cattle between 270 and 600 kg. Therefore, P requirements studies were conducted to determine the P requirement of calves (265 kg) and yearlings (385 kg). The requirement was not detected with P levels as low as …