Effect of Phase Feeding Protein on Cattle Performance and Nitrogen Mass Balance in Open Feedlots

Authors

Stephanie A. Quinn, University of Nebraska-Lincoln
Galen E. Erickson, University of Nebraska-LincolnFollow
Terry J. Klopfenstein, University of Nebraska-LincolnFollow
Richard R. Stowell, University of Nebraska-LincolnFollow
Dawn M. Sherwood, University of Nebraska-Lincoln

Date of this Version

January 2007

Comments

Published in 2007 Nebraska Beef Cattle Report. Copyright © 2006 The Board of Regents of the University of Nebraska.

Abstract

Two experiments using calves fed 176 days from November to May (WINTER) and yearlings fed 117 days from May to September (SUMMER) were conducted to compare conventional CP levels to phase-fed diets balanced for degradable intake protein and undegradable intake protein on performance and N volatilization. Phase fed diets were formulated to balance degradable intake protein and metabolizable protein. Phase feeding resulted in greater ADG and better F:G in WINTER and similar performance in SUMMER than traditional feeding methods. Nitrogen excretion was significantly reduced in both WINTER and SUMMER which translated into significantly less N volatilization without impacting N removed in manure.