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Effect of Weaning, Age at Weaning and Grain Feeding on the Performance and Production of Grazing Lambs¹

University of Minnesota, St. Paul and U. S. Department of Agriculture

Abstract

Two hundred forty-five young growing lambs rotationally grazed on alfalfa-brome pasture were used to determine the effect of weaning, age at weaning and grain feeding on subsequent lamb performance (3 yr.) and lamb production per hectare (2 yr.), using three replications each year.

Grain feeding significantly (P<.01) increased average daily gain in 2 of 3 yr. Weaning significantly decreased average daily gain in 2 of 3 yr. However, weaning with grain supplementation resulted in a greater number of lamb grazing days per hectare and greater total lamb production per hectare than other treatments in 1965 and 1966. Eight-wk.-old lambs gained significantly faster than 12-wk.-old lambs in 2 of the 3 yr. However, 8-wk.-old lambs responded to weaning or grain feeding in approximately the same fashion as 12-wk.-old lambs.

¹ Paper No. 6212, Scientific Journal Series of the Minnesota Agricultural Experiment Station, St. Paul.