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8.5 Source of Protein Supplementation for Various Forages

Published online by Cambridge University Press:  27 February 2018

T. Smith ,
W. H. Broster  and
J. W. Siviter
T. Smith
Affiliation:
National Institute for Research in Dairying, Shinfield, Reading, Berkshire
W. H. Broster
Affiliation:
National Institute for Research in Dairying, Shinfield, Reading, Berkshire
J. W. Siviter
Affiliation:
National Institute for Research in Dairying, Shinfield, Reading, Berkshire
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Extract

To make the best use of forages, it is necessary to consider the need for, and source of, nitrogen supplementation of the diet. This paper describes a study of the use of spring barley straw and other forages in the diet of the dairy heifer between 9-18 months of age, 200-300 kg live weight and required to grow at 0.5-0.7 kg per day. In the feeding trials, fixed amounts of the diets were fed.

In the first series of experiments, it was demonstrated that spring barley straw could supply up to 70% of the dry matter (DM) intake in mixed straw:concentrate diets when an adequate protein content was supplied. Thus, when fish meal was added, the required growth rates were obtained, as demonstrated in Figure 8.5.1 (Smith, Broster and Siviter, 1980), comparing favourably with estimates of energy requirements for growth (MAFF, 1975). With low straw (< 50%) diets, the response to fish meal was less.

Type
8. Theatre Presentations II
Information
BSAP Occasional Publication , Volume 6: Forage Protein in Ruminant Animal Production , 1982 , pp. 166 - 168
Copyright
Copyright © British Society of Animal Production 1982

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References

Broster, W. H., Smith, T., Siviter, J. W., Schuller, E. and Broster, V. J. 1978. Experiments on the nutrition of the dairy heifer. XI. Further observations on the effect of energy intake on protein utilization. J. agric. Sci., Camb. 91: 399–413.CrossRefGoogle Scholar
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