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Hydrolytic Rancidity in Milk. II. Some Management and Environmental Factors Influencing Lipolysis

Departments of Animal Science and Dairying, University of Alberta, Edmonton

ABSTRACT

The results presented Confirm that susceptibility of milk to spontaneous rancidity varies with individuality of the cow, stage of lactation and season. The observation that season and stage of lactation also influence susceptibility of milk to temperature-induced rancidity is inconsistent with results reported previously.

Advanced lactation, not advanced gestation, appeared to be the factor which contributed to the increase in rancidity toward the end of lactation.

No evidence was obtained to indicate a relation between the estrus cycle and susceptibility of milk to rancidity. Results obtained following injections of a mixture of pituitrin and stilbestrol were inconsistent.

¹ Present address: Dominion Experimental Station, Lacombe, Alberta.

² Present address: University of California, Davis.