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"Experientia docet" - Experience is the best teacher

Estimation of genetic parameters of test day fat and protein yields in Brazilian Holstein cattle using an autoregressive multipl

  • 2009
  • Issue: 5
  • Volume: 39
C.N. Costa, J. Carvalheira, J.A. Cobuci, A.F. Freitas and G. Thompson Page: 165 - 168

This study was aimed to estimate variance components and genetic parameters for daily fat and protein yields of Brazilian Holstein cattle, using an autoregressive test day multiple lactations (AR) animal model. Data consisted of test day (TD) records produced by…

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Effects of total dissolved solids on the accumulation of Br, As and Pb from drinking water in tissues of selected organs in broi

  • 2009
  • Issue: 5
  • Volume: 39
M.C. Mamabolo, J.A. Meyer and N.H. Casey Page: 169 - 172

Water quality constituents ingested through drinking water can affect the animal’s physiology negatively and, through bioaccumulation in tissues, pose a biohazard to consumers. The study evaluated the effectiveness of a total dissolved solid (TDS) treatment as a possible alleviator of…

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The nutritive value of South African Medicago sativa L. hay

  • 2009
  • Issue: 5
  • Volume: 39
G.D.J. Scholtz, H.J. van der Merwe and T.P. Tylutki Page: 179 - 182

A study was conducted to evaluate the variation and expand the existing and limiting nutritive value database of Medicago sativa L. hay (168 near-infrared reflectance spectroscopy spectrally selected samples) in South Africa. The highest moisture content recorded (140 g/kg) was…

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Prediction of chemical composition of South African Medicago sativa L. hay from a near infrared reflectance spectroscopy spectra

  • 2009
  • Issue: 5
  • Volume: 39
G.D.J. Scholtz, H.J. van der Merwe and T.P. Tylutki Page: 183 - 183

The near infrared reflectance spectroscopy (NIRS) to predict chemical and digestibility parameters was investigated.  Samples (n = 168) representing the spectral characteristics of the South African Medicago sativa L. hay population were chemically analysed for the development of calibration equations. …

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Evaluation of models for assessing Medicago sativa L. hay quality

  • 2009
  • Issue: 5
  • Volume: 39
G.D.J. Scholtz, H.J. van der Merwe and T.P. Tylutki Page: 188 - 192

A study was conducted to evaluate current proposed models for assessing Medicago sativa L. hay quality, using near infrared reflectance spectroscopy (NIRS) analyses and Cornell Nett Carbohydrate and Protein System (CNCPS) milk production prediction as a criterion of accuracy.  Application…

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Production and breeding performance of South African dairy herds

  • 2009
  • Issue: 5
  • Volume: 39
H.E. Theron and B.E. Mostert Page: 206 - 210

Comparisons between production and breeding potential of different feeding systems (Concentrates, Mixed and Pastures)in South Africa were made. Data of active cows participating in performance testing as at November 2007 were used. Holstein cows numbered 68280 in 254 herds and…

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Improving the quality of wool through the use of gene markers

  • 2009
  • Issue: 5
  • Volume: 39
T.O. Itenge, J.G.H. Hickford, R.H.J. Forrest, G.W. McKenzie and C.M. Frampton Page: 219 - 223

This study aimed at identifying gene markers associated with wool quality traits in Merino and Merino Cross sheep using a candidate gene approach. Polymerase chain reaction-single strand conformational polymorphism (PCR-SSCP) analysis was used to identify sequence variation in the KAP1.3…

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Influence of species/cultivar and season on the quality of Atriplex grown at different sites in South Africa

  • 2009
  • Issue: 5
  • Volume: 39
W.A. van Niekerk, Abubeker Hassen, P.J. Vermaak and R.J. Coertze Page: 238 - 241

Atriplex species/cultivars [Atriplex nummularia, A. canescens (Santa Rita) and A. canescens (Field Reserve 1)] were compared in terms of chemical composition and in vitro digestibility. The plant material was sampled at different seasons (autumn and winter) and from different sites…

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