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The effect of level and type of concentrate and type of conserved forage on dry matter intake and milk production of lactating dairy cows

Published online by Cambridge University Press:  27 March 2009

R. H. Phipps ,
R. F. Weller ,
R. J. Elliott  and
J. D. Sutton
R. H. Phipps
Affiliation:
AFRC Institute for Grassland and Animal Production, Church Lane, Shinfield, Reading RG2 9AQ
R. F. Weller
Affiliation:
AFRC Institute for Grassland and Animal Production, Church Lane, Shinfield, Reading RG2 9AQ
R. J. Elliott
Affiliation:
AFRC Institute for Grassland and Animal Production, Church Lane, Shinfield, Reading RG2 9AQ
J. D. Sutton
Affiliation:
AFRC Institute for Grassland and Animal Production, Church Lane, Shinfield, Reading RG2 9AQ
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Summary

Between weeks 3 and 16 of lactation 191 British Friesians received a basal ration ad libitum of either grass silage (GS), grass and maize silage (GS/MS) blended in a ratio of 1:2 or grass silage and 4% NaOH-treated barley straw (GS/TS) blended in a 4:1 ratio. The grass silage, which was not well preserved, had an estimated metabolizable energy (ME) content of 9–9 MJ/kg D.M., while corresponding values for the GS/MS and GS/TS mixtures were 106 and 9–5 MJ/kg D.M., respectively. A conventional concentrate (CC) based on barley and soyabean meal was fed at three levels (9, 6 and 3 kg fresh weight/day). Although the 9 kg level was only used in conjunction with GS, the two lower levels were fed with all three forage types. Concentrate composition was also varied at the 6 and 3 kg levels by replacing, in each case, 2 kg CC with a special concentrate (SC) which, in addition to barley, wheat and soyabean meal contained, on an air-dry basis, 25 % fishmeal and 25 % protected fat in the form of Megalac

Type
Research Article
Information
The Journal of Agricultural Science , Volume 111 , Issue 1 , August 1988 , pp. 179 - 186
Copyright
Copyright © Cambridge University Press 1988

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