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"Experientia docet" - Experience is the best teacher

Rumen bacteria in sheep fed supplemented teff hay

  • 1983
  • Issue: 3
  • Volume: 13
J.J. Therion, R.I. Mackie and F.M.C. Gilchrist Page: 215 - 217

Low-protein teff hay was supplemented with 3% urea and 6% starch to promote growth of the amylolytic bacteria, which liberate branched chain amino acids in the rumen upon lysis. These serve as a source of branched chain volatile fatty acids…

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Kinetic measurements on bacterial cultures growing on fibres

  • 1983
  • Issue: 3
  • Volume: 13
A. Kistner, J.H. Kornelius and G.S. Miller Page: 217 - 220

The culture outflow-rate from a specially designed pH-auxostat continuous culture system can be used to calculate the specific growth rates of different bacterial species on suspensions of cellulose or other insoluble substrates. Provided a constant concentration of substrate is maintained…

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Forage evaluation by analysis after fermentation in vitro

  • 1983
  • Issue: 3
  • Volume: 13
C. Dennison and A.M. Phillips Page: 222 - 224

Different forages were analyzed after in vitro fermentation for amino acid and metabolizable energy content, in order to evaluate their potential as ruminant feeds. Least-cost formulations of supplemental by-pass proteins provide the balance of amino acids required for duodenal amino…

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Telingsnavorsing in Suid-Afrika

  • 1983
  • Issue: 4
  • Volume: 13
A.O. de Lange en S.C. Slippers Page: 277 - 280

Animal breeding research in South Africa. During the 1979/80 financial year R310 million or 0,64 % of the GNP was spent on research. Of this amount 89,28 % was spent on research in the natural sciences and 10,72 % on…

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Future aspects of micromanipulation with embryos for cattle breeding

  • 1983
  • Issue: 4
  • Volume: 13
H. Kräusslich and G. Brem Page: 286 - 291

Embryo micromanipulation techniques and their potential genetic impact in dairy cattle are discussed. In addition, some aspects of gene transfer are mentioned. Only the technique of splitting bovine embryos and the subsequent transfer of half-embryos has reached a stage which…

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Voedingsnavorsing met die weidende dier

  • 1983
  • Issue: 4
  • Volume: 13
E.A.N. Engels Page: 292 - 298

Nutrition research with grazing ruminants. Native pasture is still the main source of feed supply for the sheep and beef cattle industries. Apparently an inadequate intake of digestible nutrients puts a limitation on animal production. Due to the seasonal pattern…

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