RESPONSE OF CHICKS TO THE FEEDING OF DIFFERENT RAPESEED OILS AND RAPESEED OIL FRACTIONS

1977 ◽  
Vol 57 (1) ◽  
pp. 137-140 ◽  
Author(s):  
B. E. MARCH
Keyword(s):  
Growth Rate ◽  
Erucic Acid ◽  
Growth Rates ◽  
Feed Efficiency ◽  
Rapeseed Oil ◽  
Mineral Content ◽  
Corn Oil ◽  
Feed Utilization ◽  
Oil Fractions ◽  
Low Erucic Acid

Growth rates of chicks and efficiency of feed utilization were similar when the diet contained 4% of either rapeseed oil or corn oil in one experiment and when the diet contained 10% of either rapeseed oil or soybean oil in a second experiment. Gums from high or low erucic acid rapeseed at dietary levels of 4–5% resulted in growth rates and feed efficiency similar to those obtained with the oils. Acidulated soapstock and non-acidulated soapstock from high and low erucic acid rapeseed, fed in comparison with oils, gave favorable results for growth rate. The non-acidulated soapstocks, probably as a result of their 6% mineral content, reduced feed efficiency slightly. There was no mortality attributable to any of the oils or oil fractions.

EFFECTS OF FEEDING MILK REPLACERS CONTAINING LOW-ERUCIC ACID RAPESEED OIL ON GROWTH, NUTRIENT DIGESTIBILITY, MEAT QUALITY AND HISTOLOGICAL CHANGES IN TISSUES OF VEAL CALVES

1978 ◽  
Vol 58 (3) ◽  
pp. 465-470 ◽  
Author(s):  
J. R. SEOANE ◽  
A. D. L. GORRILL ◽  
J. W. G. NICHOLSON ◽  
E. LARMOND ◽  
R. G. STEVENSON
Keyword(s):  
Erucic Acid ◽  
Feed Efficiency ◽  
Rapeseed Oil ◽  
Nitrogen Retention ◽  
Nutrient Digestibility ◽  
Long Term Effects ◽  
Veal Calves ◽  
Low Erucic Acid ◽  
Dietary Treatments ◽  
Milk Replacers

Sixteen Holstein bull calves were used during 62–82 days to study the long-term effects of substituting 0, 25, 50 and 75% of the animal fat (tallow) with low-erucic acid rapeseed oil (Span) in milk replacers for veal calves. Growth rates and feed efficiency were affected by the dietary treatments. The highest level of substitution (75%) did not affect the digestibility of the energy or the dry matter, but did decrease average daily gains, feed efficiency and the apparent digestibility of dietary nitrogen (P < 0.05). Nitrogen retention and utilization were not affected by the dietary treatments. The histological analyses of various internal organs did not reveal any treatment effects. The evaluation of carcass quality showed no differences in flavor but there was a non-linear decrease in tenderness of the meat with increasing levels of rapeseed oil in the diets. The 75% level of substitution resulted in tougher meat than the 25% level treatment.

THE EFFECTS OF DIFFERENT VARIETIES OF RAPESEED OIL ON WEIGHT GAIN, AND OF GOLDEN RAPESEED OIL ON REPRODUCTION, OF THE RAT

1959 ◽  
Vol 37 (10) ◽  
pp. 1191-1195 ◽  
Author(s):  
Joyce L. Beare ◽  
E. R. W. Gregory ◽  
J. A. Campbell
Keyword(s):  
Weight Gain ◽  
Erucic Acid ◽  
Rapeseed Oil ◽  
Corn Oil ◽  
Retarding Effect ◽  
Wistar Strain ◽  
Weanling Rats ◽  
Weight Gains ◽  
Reproduction Study

Rapeseed oil of the Polish, Golden, or Swedish varieties, corn oil, or mixtures of corn oil and ethyl erucate were fed to weanling rats of the Wistar strain for 9 weeks. Weight gains were inversely related to the content of erucic acid in the diet, confirming previous indications that the growth retarding effect of rapeseed oil is due to its erucic acid. In general, the differences in weight gains could be explained by the effect of rapeseed oil on food consumption.Golden rapeseed oil and corn oil were compared in a reproduction study involving three litters of one generation. Although the young of rats fed rapeseed oil were of lesser weanling weight, there was no difference in the number of animals successfully weaned.

THE INFLUENCE OF HIGH AND LOW ERUCIC ACID RAPESEED OILS ON THE PRODUCTIVE PERFORMANCE OF LAYING HENS AND ON THE LIPID FRACTION OF EGG YOLK

1974 ◽  
Vol 54 (3) ◽  
pp. 403-410 ◽  
Author(s):  
H. VOGTMANN ◽  
D. R. CLANDININ ◽  
R. T. HARDIN
Keyword(s):  
Fatty Acids ◽  
Fatty Acid ◽  
Soybean Oil ◽  
Erucic Acid ◽  
Rapeseed Oil ◽  
Fatty Acid Content ◽  
Egg Yolk ◽  
Productive Performance ◽  
Egg Weight ◽  
Low Erucic Acid

The effects of including 5 or 15% of high (regular) and low (Span) erucic acid rapeseed oils or soybean oil on productive performance, total lipid and fatty acid content of egg yolk, and distribution of fatty acids in egg yolk fat were studied. Feed intake varied according to the dietary energy content. However, 15% high erucic acid rapeseed oil decreased feed intake and egg production in comparison with 15% low erucic acid rapeseed oil or soybean oil. Hens receiving rations containing soybean oil produced larger eggs in the treatment than in the pre-treatment period. Five percent regular rapeseed oil in the diet led to a small increase in egg weight, whereas inclusion of 15% regular rapeseed oil in the diet led to a decrease in egg weight. Diets containing the Span oil gave intermediate results. Although the total lipid and total fatty acid content in egg yolk remained constant, the fatty acid composition changed significantly with the experimental diets. The concentration of saturated fatty acids in eggs produced by hens fed diets containing the regular rapeseed oil or low erucic acid rapeseed oil (Span oil) decreased only to a small extent and not in proportion to the amount of these fatty acids present in the diets; but the oleic acid concentration in eggs produced by the hens fed diets containing the rapeseed oil was high. Only 0.2% of erucic acid was found in eggs when 15% regular rapeseed oil was fed to laying hens. The laying hen seems to be able to maintain the level of saturated and monounsaturated fatty acids in yolk lipids in a physiological range. The results indicate that in the laying hen, a partial degradation of erucic acid to gadoleic acid and oleic acid takes place.

Hydrogenation of Low Erucic Acid Rapeseed Oil

1983 ◽  
Vol 85 (3) ◽  
pp. 99-105 ◽  
Author(s):  
P. S. Puri ◽  
J. M. De Man
Keyword(s):  
Erucic Acid ◽  
Rapeseed Oil ◽  
Low Erucic Acid

EFFECTS OF SATURATED FAT IN RATS FED RAPESEED OIL

1963 ◽  
Vol 41 (1) ◽  
pp. 605-612 ◽  
Author(s):  
Joyce L. Beare ◽  
J. A. Campbell ◽  
C. G. Youngs ◽  
B. M. Craig
Keyword(s):  
Fatty Acids ◽  
Erucic Acid ◽  
Palmitic Acid ◽  
Rapeseed Oil ◽  
Unsaturated Fatty Acids ◽  
Corn Oil ◽  
Methyl Esters ◽  
Saturated Fatty Acids ◽  
Weight Gains ◽  
Similar Content

The effects of increasing the saturated fatty acids in a dietary vegetable oil composed mostly of unsaturated fatty acids were studied in rats. A mixture of palm oil and Swedish rapeseed oil fed for 4 weeks as 20% of a purified diet promoted weight gains which exceeded those obtained with Polish rapeseed oil of a similar content of erucic acid, and altered the proportion of saturated fatty acids in the tissues to reflect that of the diet. When methyl esters of saturated fatty acids were added to Swedish rapeseed oil, similar effects on weight gain were not observed, but methyl esters of fatty acids from corn oil and rapeseed oil were shown to be of less nutritional value than the original glycerides. From fatty acids of olive oil, glycerides containing 3% palmitic acid were prepared, and produced weight gains which did not differ significantly from those of rats fed Polish rapeseed oil with a similar content of palmitic acid and 20% erucic acid. The characteristic effects of rapeseed oil are, therefore, attributed to its low content of saturated fatty acids as well as its high content of erucic acid.

PERFORMANCE AND HISTOLOGICAL CHANGES IN TISSUES OF PIGS FED DIETS CONTAINING HIGH OR LOW ERUCIC ACID RAPESEED OILS OR SOYBEAN OIL

1975 ◽  
Vol 55 (1) ◽  
pp. 77-85 ◽  
Author(s):  
F. X. AHERNE ◽  
J. P. BOWLAND ◽  
H. VOGTMANN ◽  
R. T. HARDIN ◽  
R. G. CHRISTIAN
Keyword(s):  
Soybean Oil ◽  
Erucic Acid ◽  
Rapeseed Oil ◽  
Caloric Intake ◽  
Histological Changes ◽  
High Erucic Acid ◽  
High Erucic Acid Rapeseed ◽  
Ad Libitum ◽  
Pig Performance ◽  
Low Erucic Acid

Three experiments were conducted to compare high (20.6%) or low (4.0%) erucic acid rapeseed oils with soybean oil when the oils were fed at a level of 15% of the diet for pigs from 25 to 90 kg liveweight. The low erucic acid rapeseed oil originated from Brassica campestris cv. Span. A fourth diet containing no supplemental oil served as a control. In one experiment, 48 crossbred pigs were fed ad libitum in groups of three pigs replicated four times. In a second experiment, 48 pigs were individually fed at a level of 80% of the daily caloric intake of the pigs in the first experiment. In a third experiment, 16 pigs in four groups were allowed continuous free-choice access to the four diets. Serial slaughter and digestibility data were obtained. The incorporation of high or low erucic acid rapeseed oil in the diets did not reduce pig performance when such diets were fed either ad libitum or at a restricted level. When given a choice of feed, pigs selected less of the high erucic acid rapeseed oil diet. When not given a choice of feed, pigs consumed as much of a high erucic acid rapeseed oil diet as they did of the other diets. Digestibility coefficients for energy, nitrogen and lipids were not significantly different for any of the three oil-containing diets. Histological examination of the heart, liver and spleen revealed no marked differences due to feeding any of the oil-based diets.

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