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The voluntary feed intake and weight gain of lambs given compound concentrate feeds containing rapeseed meal with a range of glucosinolate contents

Published online by Cambridge University Press:  24 November 2017

Isobel C Vincent ,
J Thompson  and
R Hill
Isobel C Vincent
Affiliation:
The Royal Veterinary College, Boltons Park, Potters Bar, Herts
J Thompson
Affiliation:
The Royal Veterinary College, Boltons Park, Potters Bar, Herts
R Hill
Affiliation:
The Royal Veterinary College, Boltons Park, Potters Bar, Herts
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Extract

Lambs given ad, libitum, a compound concentrate feed containing a high proportion of a high glucosinolate rapeseed meal gained weight at a significantly lower rate than similar lambs given a concentrate feed based on soyabean meal (Stedman et al, 1983). The glucosinolate content of the concentrate feed containing rapeseed meal was just over 20 µmol/g. In the experiment described here the effects on lamb weight gain and concentrate intake were determined from a range of compound feeds containing the same proportion of rapeseed meal but different glucosinolate contents, to a maximum approaching 20 µmol/g.

Two rapeseed meals were used, one of low glucosinolate content (Dolar-DRSM), about 3.5 µmol/g, and the other of high glucosinolate content (autumn UK sown variety - BRSM), about 85 µmol/g. Eight compound concentrate feeds were prepared (Table 1), all containing 0.20 rapeseed meal but having calculated glucosinolate contents of 0 to 17.5 µmol/g. Their ME value was 12.5 MJ and CP 200 g/kg DM. The mineral and vitamin supplement provided 0,8 mg I/kg concentrate feed.

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Raw Materials
Information
Proceedings of the British Society of Animal Production (1972) , Volume 1990 , March 1990 , pp. 142
Copyright
Copyright © The British Society of Animal Production 1990

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References

Stedman, J.A., Pittam, S. and Hill, R. (1983). Ovulation in ewe lambs given diet containing high glucosinolate rapeseed meal. Proceedings of the 6th International Rapeseed Congress, Paris. Volume 2, pp. 1618–1621.Google Scholar