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A comparison of silages made from red clover/grass, white clover/grass and high nitrogen grass swards for beef production

Published online by Cambridge University Press:  02 September 2010

T. A. Stewart  and
I. I. McCullough
T. A. Stewart
Affiliation:
Greenmount Agricultural and Horticultural College, Antrim, BT41 4PU
I. I. McCullough
Affiliation:
Greenmount Agricultural and Horticultural College, Antrim, BT41 4PU
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Abstract

Silage cut twice annually (June and August) from a tetraploid red clover/grass sward and three times annually (May, July and September) from a low nitrogen (N) and high N perennial ryegrass/white clover sward was fed in proportion to dry-matter yield from each cut, over a 10-week period, each winter for 3 years to castrated male cattle of initial live weight 401 kg in year 1 and 425 kg in years 2 and 3. The silages were supplemented with 0, 1, 2 and 3 kg concentrate per head daily.

Total dry-matter yield from the red clover/grass sward was similar to that from the perennial ryegrass/white clover sward (high N grass) receiving 360 kg N per ha but the digestibility, particularly of first cut material was much lower. Dry-matter production of the low N grass/white clover sward was 0·73 of high N grass sward and produced silages of similar digestibility and fermentation.

Dry-matter intakes by the cattle were higher on the legume-based silages in years when clover made a worthwhile contribution to total yield, but this did not significantly improve utilization or animal performance compared with high N grass silage. Mean daily carcass gain per head on red clover/grass silage was 0·41 kg which was significantly less than the 0·61 kg on white clover/grass silage and 0·59 on high N grass (P < 0·001). Carcass output from red clover/grass silage was 618 kg/ha and 629 kg/ha from white clover/grass, both of which were significantly less than the 863 kg/ha from the high N grass silage (P < 0·001). Dressing proportion was also significantly poorer in animals fed red clover/grass silage compared with the other silage types.

Type
Research Article
Information
Animal Production , Volume 40 , Issue 2 , April 1985 , pp. 267 - 277
Copyright
Copyright © British Society of Animal Science 1985

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References

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