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Effects of feeding low levels of high protein concentrates differing in protein source on milk production of dairy cows

Published online by Cambridge University Press:  24 November 2017

S. Fitzgerald  and
J. Murphy
S. Fitzgerald
Affiliation:
Teagasc, Moorepark Research Centre, Fermoy, Co. Cork, Republic of Ireland
J. Murphy
Affiliation:
Teagasc, Moorepark Research Centre, Fermoy, Co. Cork, Republic of Ireland
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Extract

Studies reported by Mayne (1990) and Slater (1989) have shown that the yield of milk achieved by feeding a low level of a high protein concentrate with a good quality silage fed to appetite was comparable to that obtained by feeding higher levels of a conventional concentrate containing a normal level of protein (160-180g CP/kg). These results would indicate that there is considerable scope to reduce concentrate feeding levels and reduce feed costs when good quality grass silage is available. However, in previous studies at this centre (Murphy, 1987) very low levels (2.4 kg/d) of high protein concentrates (400-450 g CP/kg) fed with a good quality grass silage reduced milk production compared with a moderate level (6 kg/d) of a normal protein concentrate (160-180 g CP/kg).

The present study was carried out to clarify the position and to establish the benefit of including a source of undegradable protein, e.g. maize distillers grains or fishmcal in place of soyabcanmeal in the prolein concentrate.

Type
Milk Production: 1
Information
Proceedings of the British Society of Animal Production (1972) , Volume 1992 , March 1992 , pp. 39
Copyright
Copyright © The British Society of Animal Production 1992

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References

(1) Mayne, S. (1990). BSAP Winter Meeting, Scarborough, Paper No. 43.Google Scholar
(2) Slater, M. J. (1989). High protein supplements to silage for dairy cows. J. Irish Grassland and Animal Production Association, 23: 110–113.Google Scholar
(3) Murphy, J. J. (1987). Proc. 8th Silage Conference IGAP, Hurley, pp.59–60.Google Scholar