The utilization of dietary fats by ruminants:I. The digestibility of some commercially available fats
- 1 August 1970
- journal article
- Published by Cambridge University Press (CUP) in The Journal of Agricultural Science
- Vol. 75 (1), 47-53
- https://doi.org/10.1017/s0021859600026046
Abstract
SUMMARY The digestibility of some fats (beef tallow, HEF, herring oil, soyabean oil and maize oil) were studied in balance trials with sheep which had been maintained on the diets for a 35 day period of acclimatization to establish ‘steady state’ conditions. Corrected digestibility coefficients for the individual fats were calculated from a knowledge of the intake and output of lipid on a low-fat basal ration. The difference between the intake of fat and the corrected lipid output (total lipid output minus lipid output on basal ration) expressed as a percentage gave the corrected digestibility coefficients. It was found that the corrected digestibility coefficients for beef tallow was 85%; HEF, 74%; herring oil, 84%; soyabean oil, 83%; and maize oil, 70%. The values for beef tallow and HEF were comparable to similar estimates in pigs. The digestibility of the highly unsaturated soyabean and maize oil were markedly lower in comparison with non-ruminant species. Extensive hydrogenation of dietary unsaturated fatty acids was confirmed. For soyabean and maize oil the corrected output of stearic acid exceeded the dietary intake.Keywords
This publication has 16 references indexed in Scilit:
- The utilization of dietary fats by ruminants:II. The effect of fatty acid chain length and unsaturation on digestibilityThe Journal of Agricultural Science, 1970
- The determination of the true digestibilities of interesterified fats in young pigsBritish Journal of Nutrition, 1968
- Determination of Digestibility and Metabolizable Energy in Pure Fats and Discussion of Analytical Methods Employed in Experiments with growing ChickensActa Agriculturae Scandinavica, 1968
- Fats and amino acids in broiler rationsBritish Poultry Science, 1966
- The use of fats in pig feeding:I. Pig faecal fat not of immediate dietary originThe Journal of Agricultural Science, 1965
- The Energy Value of Fats and Fatty Acids for ChicksPoultry Science, 1961
- THE EFFECT ON HUMAN SERUM-LIPIDS OF A DIETARY FAT, HIGHLY UNSATURATED, BUT POOR IN ESSENTIAL FATTY ACIDSThe Lancet, 1959
- A sensitive detector for gas chromatographyJournal of Chromatography A, 1958
- Fat Studies in PoultryPoultry Science, 1957
- THE ABSORBABILITY OF NATURAL AND MODIFIED FATSaJournal of Food Science, 1956