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Formulating Beef Rations for Improved Performance under Environmental Stress
Author(s) -
Brokken Ray F.
Publication year - 1971
Publication title -
american journal of agricultural economics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.949
H-Index - 111
eISSN - 1467-8276
pISSN - 0002-9092
DOI - 10.2307/3180300
Subject(s) - heat stress , net energy , nutrient , beef cattle , environmental stress , zoology , ruminant , energy metabolism , environmental science , mathematics , agricultural engineering , microbiology and biotechnology , biology , agronomy , ecology , engineering , environmental protection , crop , endocrinology
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.