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The Nutritive Value of Tobacco-Seed Oil¹

Two Figures

Department of Chemistry, Kentucky Agricultural Experiment Station, University of Kentucky, Lexington

1. When tobacco-seed oil was fed to rats at levels of 5, 15 and 30% of the respective rations it gave an average coefficient of digestibility of 97.9 as compared with 99.1 and 98.2 for cotton-seed oil and butterfat, respectively.

2. With paired feeding of refrigerated rations containing 30% of tobacco-seed oil and butterfat, respectively, growth rates of rats did not differ significantly. When fed ad libitum, the difference in consumption of the two rations produced a greater rate of growth in rats fed butterfat.

3. Of six rats fed refrigerated ration and four animals fed non-refrigerated ration containing 30% tobacco-seed oil for 5 weeks, during the period when growth is usually maximum, all proved to be fertile upon reaching maturity.

4. Both temperature and surface area affected the rate of oxidation of the oil. When surface area was small, as in the case of the isolated oil, no particular care in storing was necessary; but when the oil was incorporated in a ration and kept for any length of time, refrigeration was necessary.

Manuscript received 24 September 1945.