Skip to main content Accessibility help
×
Home

Rumen degradation of straw 5. Botanical fractions and degradability of different varieties of oat and wheat straws

  • W. J. Shand, E. R. Ørskov (a1) and L. A. F. Morrice (a2)

Abstract

Straw from six varieties of oat and 12 varieties of wheat were divided into their botanical fractions of leaf plus leaf sheath, internodes, nodes and chaff, and the rumen degradabilities of the individual fractions determined by the nylon bag method.

The proportions of the fractions varied between varieties, but more so within wheat than within oat straw. The proportion of leaf plus leaf sheath varied from 0·27 to 0·37 for wheat and 0·29 to 0·33 for oats with the proportion of stem ranging from 0·41 to 0·51 for wheat and from 0·55 to 0·60 for oats. There were also differences in degradation characteristics, more evident in wheat than in oats. The 48-h degradability varied from 570 to 650 g/kg for wheat leaf plus leaf sheath and from 300 to 380 g/kg for wheat stem. The respective ranges for oat straws were from 480 to 530 and from 250 to 280.

Generally, the wheat straw varieties, and in particular leaf from wheat straw, were of a higher degradability than oat straw. The mean 48-h degradabilities of wheat and oat leaf were 615 and 501 g/kg respectively. There was no relationship between the nitrogen content of leaves or stems and their degradability.

Copyright

References

Hide All
Bainton, S. J., Plumb, V. E., Capper, B. S. and Juliano, B. O. 1987. Botanical composition, chemical analysis and cellulase solubility of rice straw from different varieties. Animal Production 44: 481 (Abstr.).
Capper, B. S., Thomson, E. F., Rihawi, S., Termanini, A. and Macrae, R. 1986. The feeding value of straw from different genotypes of barley when given to Awassi sheep. Animal Production 42: 337342.
Davidson, J., Mathieson, J. and Boyne, A. W. 1970. the use of automation in determining nitrogen by the Kjeldahl method, with final calculations by computer. Analyst, London 95: 181193.
Kernan, J. A., Coxworth, E. C., Crowle, W. L. and Spurr, D. T. 1984. The nutritional value of crop residue components from several wheat cultivars grown at different fertilizer levels. Animal Feed Science and Technology 11: 301311.
Mehrez, A. Z. and Ørskov, E. R. 1977. A study of the artificial fibre bag technique for determining the digestibility of feeds in the rumen. Journal of Agricultural Science, Cambridge 88: 645650.
Ørskov, E. R. and Mcdonald, I. 1979. The estimation of protein degradability in the rumen from incubation measurements weighted according to rate of passage. Journal of Agricultural Science, Cambridge 92: 499503.
Ørskov, E. R., Reid, G. W. and Kay, M. 1988. Predictions of intake by cattle from degradation characteristics of roughages. Animal Production 46: 2934.
Pearce, G. R. 1983. Variability in the composition and in vitro digestibility of cereal straws. In Feed Information and Animal Production (ed. Robards, G. E. and Packham, R. G.), pp. 417420. Commonwealth Agricultural Bureaux, Farnham Royal.
Ramanzin, M., Ørskov, E. R. and Tuah, A. K. 1986. Rumen degradation of straw. 2. Botanical fractions of straw from two barley cultivars. Animal Production 43: 271278.
Rexen, F. and Munck, L. 1984. Cereal crops for industrial use in Europe. European Economic Community Publication EUR 9617EM.
Tuah, A. K., Lufadeju, E., Ørskov, E. R. and Blackett, G. A. 1986. Rumen degradation of straw. 1. Untreated and ammonia-treated barley, oat and wheat straw varieties and triticale straw. Animal Production 43: 261269.
Walli, T. K., Ørskov, E. R. and Bhargava, P. 1988. Rumen degradation of straw. 3. Botanical fractions of two rice straw varieties and effects of ammonia treatment. Animal Production 46: 347352.

Rumen degradation of straw 5. Botanical fractions and degradability of different varieties of oat and wheat straws

  • W. J. Shand, E. R. Ørskov (a1) and L. A. F. Morrice (a2)

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed