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Relationship of Size of Growing Cattle to Pasture Intake and its Use as an Index of Palatability¹

Department of Animal Husbandry, Cornell University, Ithaca, New York

ABSTRACT

An examination of the relationship of the body weight of growing cattle grazing four pastures to the dry matter intake revealed a highly significant correlation between these two variables. In addition, it was found that the dry matter intake increases by 3.5 lb. per day for a body weight increment of 100 lb., provided that sufficient herbage is available to satisfy the appetite. The relative constancy of the rate of change in intake with changing body weight suggests that an accounting for the influence of varying body weights upon the absolute dry matter intake provides an index of palatability. Although this approach to an objective measurement of palatability needs much more study, it would appear to be particularly useful in comparisons of different kinds of pastures and their responses to various treatments.

¹ Portions of these data were presented by C. M. Martin and W. F. Brannon in theses to the Graduate School, Cornell University, in partial fulfillment of the requirements for the Ph.D. degree, 1952 and 1953, respectively.

² Present address: Alabama Polytechnic Institute, Auburn.

³ Present address: U. S. Department of Interior, The Squaw-Butte Harney Grazing Research Station, Burns, Ore.