Formulating Beef Rations for Improved Performance under Environmental Stress

Ray F. Brokken

American Journal of Agricultural Economics, 1971, vol. 53, issue 1, 79-91

Abstract: Beef ration heat increment level (energy lost in ruminant fermentation and nutrient metabolism) relative to net energy has important implications for efficient beef production under heat or chill stress. This paper presents (1) an efficient model for use of the Lofgreen-Garrett net energy system in ration formulation; (2 ) a model, incorporating the Lofgreen-Garrett net energy system, for varying heat increment relative to net energy in beef ration formulation; and ( 3) a simplified framework for ascertaining potential animal performance differences caused by differences in relative heat increment under assumed stress conditions. Differences illustrated are substantial.

Date: 1971
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