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Wool Production as Affected by the Level of Protein in the Ration of the Mature Ewe¹

Dominion Experimental Station^,3

Abstract

Pelleted isocaloric rations containing 7, 10, and 13 percent protein were fed to mature ewes for a period of one year to study their influence on wool production. From the data presented the following conclusions seem justified.

1. Increasing the level of protein from a basal ration containing 7 percent protein to 10 and 13 percent produced significant increases in raw fleece weights.
   
2. Highly significant increases in clean fleece weight were obtained from ewes on 10 and 13 percent protein rations as compared to ewes on the ration containing 7 percent protein. No difference was observed in the clean wool production from the two groups receiving the 10 and 13 percent protein rations.
   
3. The weight of clean wool obtained from a measured area (2 x 2 cm.) confirmed the results obtained from the clean fleece weight data. Increasing the protein content from 7 to 10 percent produced a highly significant increase in clean weight but further supplementation resulted in only a slight non-significant increase.
   

¹ Contribution from the Experimental Farm Service, Canada Department of Agriculture, Ottawa. Part of a thesis submitted by the senior author to the Graduate School, University of Wyoming, Laramie, Wyoming, in partial fulfillment of the requirements for the Degree of Doctor of Philosophy.

² The authors wish to acknowledge the assistance given by Dr. R. H. Burns and Professor Alexander Johnston, University of Wyoming, in the course of this study.

Thanks are due also to Mr. A. H. Woolliscroft, Technician Wool Research Laboratory, Lethbridge, Alberta, for conducting most of the laboratory measurements.

³ Lethbridge, Alberta.