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Value of lucerne cobs for milk production

Published online by Cambridge University Press:  02 September 2010

K. A. E. Archibald ,
E. F. Thomson  and
R. C. Campling
K. A. E. Archibald
Affiliation:
Wye College, (University of London), Ashford, Kent, TN25 5AH
E. F. Thomson
Affiliation:
Wye College, (University of London), Ashford, Kent, TN25 5AH
R. C. Campling
Affiliation:
Wye College, (University of London), Ashford, Kent, TN25 5AH
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Summary

Three changeover experiments, each with 16 milking cows, were conducted to evaluate the effects of stage of growth of lucerne, level of feeding of lucerne or ryegrass and level of inclusion of barley. The artificially dried and processed forages were in the form of cobs and given to cows in addition to a basal ration of hay. Late-cut lucerne (organic matter digestibility, OMD, 55%) promoted significantly lower milk yields than early-cut lucerne (68% OMD). When offered ad libitum in two meals each day both forages were eaten in quantities of about 13 kg dry matter. Ryegrass cobs (79% OMD) produced more milk than lucerne cobs (59% OMD) but gave similar milk yields per unit of digestible organic matter. Production rations supplying similar amounts of digestible organic matter and composed of different proportions of lucerne cobs and rolled barley gave similar milk yields. It is concluded that the relative milk-producing value of processed forages depends on their content of digestible organic matter. However, their bulk may limit their value and the inclusion of cereal with the dried forage may be worth while.

Type
Research Article
Information
Animal Production , Volume 21 , Issue 2 , October 1975 , pp. 139 - 146
Copyright
Copyright © British Society of Animal Science 1975

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References

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