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"Experientia docet" - Experience is the best teacher

Variance components and genetic parameters for body weight and fleece traits of Merino sheep in an arid environment

  • 1996
  • Issue: 1
  • Volume: 26
M.A. Snyman, J.J. Olivier and W.J. Olivier Page: 11 - 14

Data collected on the Carnarvon Merino flock over the period 1962 to 1983 were used for this study. Variance components resulting from direct additive genetic effects, maternal additive genetic effects, maternal permanent environmental effects, as well as the relationship between…

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Meeting the protein requirements of ruminant livestock

  • 1996
  • Issue: 1
  • Volume: 26
D.E. Beever Page: 20 - 26

Ruminant animals acquire their amino acids from the small intestinal digestion of ruminally derived microbial protein and dietary protein which has escaped ruminal degradation. The UK metabolizable protein system provides a framework with which the net absorption of amino acids…

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The effects of phosphorus supplementation on body mass and reproduction of grazing beef cows supplemented with different levels

  • 1996
  • Issue: 2
  • Volume: 26
H.O. de Waal, J.H. Randal and G.J. Koekemoer Page: 29 - 36

In an attempt to quantify the requirement for supplementary phosphorus (P) of grazing beef cattle at Armoedsvlakte (which is notorious for its P deficient pastures), 66 cows received supplementary P per fistulam from 1984 to 1989. Supplementation was provided according…

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Effects of feeding different levels of cowpea (Vigna unguiculata) on gut morphology and faecal composition in weanling pigs

  • 1996
  • Issue: 2
  • Volume: 26
M.O. Makinde, E. Umapathy, B.T. Akingbemi and K.T. Mandisodza Page: 42 - 46

The effects of feeding diets containing different levels of raw cowpea on the histomorphometry of the small intestine and faecal composition were investigated in weaned piglets. A total of 100 21-day-old weaners were divided into five equal groups and were…

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The use of acid detergent insoluble nitrogen to predict digestibility of rumen undegradable protein of heat processed plant prot

  • 1996
  • Issue: 2
  • Volume: 26
G.E. Schroeder, L.J. Erasmus, K-J. Leeuw and H.H. Meissner Page: 49 - 52

The usefulness of acid detergent insoluble nitrogen (ADIN) to predict digestibility of rumen undegradable protein (UDP-D) of heat processed and unprocessed plant proteins was investigated. A series of drum roasted protein sources, sunflower, cottonseed and soybean oilcake meals, in addition…

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A note on the occurrence of mycotoxins in cereals and animal feedstuffs in Kwazulu Natal, South Africa 1984-1993 (Technical Note

  • 1996
  • Issue: 2
  • Volume: 26
M.F. Dutton and A. Kinsey Page: 53 - 57

During the period 1984-1993 just over 1600 samples of agricultural commodities, comprising maize, compound animal feeds, oil seeds, soyabean, fishmeal and forage were examined for fungi and over 20 mycotoxins using a multi-screen augmented with individual assay. Aflatoxin had the…

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Ruminal and postruminal digestion of dietary protein and starch in steers: 1. Effects of protein concentration, degradation of p

  • 1996
  • Issue: 3
  • Volume: 26
H.H. Meissner and H.P.F. du Preez Page: 59 - 65

Different protein-energy ratios in feedlot diets may effect several combinations of amounts of amino acids and glucose available for absorption in the small intestine. In this regard, the effect of protein concentration and degradation, and energy content of the diet…

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Ruminal and postruminal digestion of dietary protein and starch in steers: 2. Multivariate model prediction of non-ammonia nitro

  • 1996
  • Issue: 3
  • Volume: 26
H.H. Meissner, D.V. Paulsmeier, K-J. Leeuw and C.M. Coetzer Page: 66 - 74

Multivariate prediction models were developed from the results of three divergent trials with multicannulated steers. Diets differed in composition and physical structure. Energy contents varied from 10 to 13 MJ ME/kg DM, starch from 20 to 62%, CP from 102…

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