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Effect of Level of Pasture Supplementation on Pasture, Drylot and Total Performance of Beef Cattle. II. Spring Plus Summer Pasture¹

Purdue University, Lafayette, Indiana 47907

Abstract

Finishing cattle on pasture usually gain more rapidly when supplemental energy—and sometimes protein—is fed (Edwards et al., 1968; Wise et al., 1967; Suman and Woods, 1966; Duncan, 1958). The level of concentrates fed to cattle on pasture increases the rate of gain, but such increases in gain on pasture are reflected in decreased gains of cattle subsequently confined to drylot and fed a full feed of concentrates (Dowe, Matsuchima and Arthand, 1957; Miller and Morrison, 1953).

In previous research from this Station (Perry et al., 1971), cattle on spring pasture (May 6 to July 2, 4 years) reflected the level of concentrates fed during the pasture period by linearly increased (r=0.92) rates of gain. Furthermore, cattle which were fed greater amounts of concentrates during the pasture phase and which gained more during that period gained less rapidly during the drylot finishing period which extended from July 2 until the cattle reached an average weight of 500 to 520 kilograms.

¹ Department of Animal Sciences, Journal Paper No. 4089, Purdue University Agricultural Experiment Station.

² Professor of Animal Sciences.

³ Superintendent, Miller-Purdue Agricultural Center.

⁴ Professor of Agronomy, Present address, Department of Agronomy, University of Florida, Gainesville.

⁵ Professor of Agronomy.

⁶ Professor of Agricultural Economics.