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Effect of Preslaughter Fasting on Some Chemical Properties of Bovine Muscle and Liver^{1, 2,}

Kansas State University, Manhattan 66506

Abstract

Fasting cattle for 1, 2 and 3 days had a highly significant (P<.01) effect on all liver components studied and on muscle tissue moisture. No treatment differences were noted for muscle pH. Trial differences in muscle pH were attributed to the measurements on two different muscles (pars lumbalis in trial I and longissimus in trial II). Breed had a significant (P<.05) effect on muscle pH; with British beef-crossbred cattle having lower (P<.05) values than Hereford or Angus. This could indicate that at the time of slaughter, British beef-crossbreds had greater stores of muscle glycogen than did the Herefords or Angus. Fasting up to 3 days did not affect muscle pH or water holding capacity. Breed and trial affected percentage of liver ether extract and moisture. Preslaughter fasting for 2 or 3 days prior to slaughter caused few changes of economic significance in the tissue properties studied.

¹ Contribution No. 400, Department of Animal Science and Industry, Kansas Agricultural Experiment Station, Manhattan 66506.

² Appreciation is expressed to Mr. Sam Marcus of Kansas Beef Industries, Inc., for his cooperation and support.

³ Present address: Department of Animal Science and Industry, Meat Science Building, Stillwater 76074.