A study of the effects of diet composition, within the bounds of normal diversity, on the characteristics of backfat lipid in pigs
- 1 February 1976
- journal article
- Published by Cambridge University Press (CUP) in The Journal of Agricultural Science
- Vol. 86 (1), 77-82
- https://doi.org/10.1017/s0021859600064996
Abstract
SUMMARY The experiment described was carried out to compare the effects of some combinations of dietary ingredients which were within the bounds of current commercial use but which differed in their lipid characteristics. The four dietary treatments used were either low or high in lipid content with a high or low proportion of unsaturated fatty acids in that lipid. Fourteen pigs (seven gilts and seven barrows) were assigned at random to each dietary treatment. The major dietary constituents were barley × wheat × dried skim milk (treatment 1), barley × wheat × soyabean meal (treatment 2), barley + wheat + dried skim milk × tallow (treatment 3) and barley × wheat × maize × fish meal (treatment 4). Production performances were satisfactory on treatments 1, 3 and 4. The pigs on treatment 2 ate less food, grew more slowly, had poorer feed conversion ratios and fatter carcasses than the animals on the other treatments; the reason for the poor performance on this diet is not clear. Comparison of the fatty acid compositions of the backfat triglycerides and the dietary lipid shows that the dietary lipid had little effect on the backfat lipid characteristics; only in the case of linoleic acid was there a dietary-induced effect on the amount of this fatty acid in the backfat triglycerides of pigs on treatment 4. Treatment 4 which produced the backfat with the greatest linoleic acid content also produced the softest backfat. The subjective fat scores of the carcasses of pigs fed the other diets were not related to the fatty acid compositions of the backfat triglycerides or the monoene/saturated fatty acid ratio. These results are discussed in relation to the effects of diet and triglyceride structure on pig backfat lipid characteristics.Keywords
This publication has 18 references indexed in Scilit:
- The effect on bacon pig backfat iodine number and calorific value of feeding barley or maize based diets to give different growth ratesThe Journal of Agricultural Science, 1974
- The effect of plane of nutrition on the performance and carcass characteristics of pigs slaughtered at 100 kg live weightThe Journal of Agricultural Science, 1972
- Quantitative esterification of lipids on thin-layer adsorbentsThe Analyst, 1972
- A chemical study of soft fat in cross-bred pigsThe Journal of Agricultural Science, 1970
- The effect of dietary copper on the fatty acid composition and physical properties of pig adipose tissuesBritish Journal of Nutrition, 1969
- Fatty Acid Composition of the Inner and Outer Layers of Porcine Backfat as Affected by Energy Level, Sex and SireJournal of Food Science, 1968
- The use of fats in pig feeding:II. The digestibility of various fats and fatty acidsThe Journal of Agricultural Science, 1965
- Studies on pigs reared on semi-synthetic diets containing no fat, beef tallow and maize oil: composition of carcass and fatty acid composition of various depot fatsThe Journal of Agricultural Science, 1964
- The prediction of lean percentage of pigs of bacon weight from carcass measurementsAnimal Science, 1962
- 705. A comparison of dried skim-milk and white fish meal as protein supplements for fattening pigs: II. On all-meal feeding under commercial conditionsJournal of Dairy Research, 1958