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"Experientia docet" - Experience is the best teacher

Studies on the nutritive value of cowpeas (Vigna unguiculata)

  • 1992
  • Issue: 5
  • Volume: 22
F.J. Nell, F.K. Siebrits and J.P. Hayes Page: 157 - 160

Samples of 150 different cowpea cultivars, used in the breeding trials of the Summer Grain Institute at Potchefstroom, were analysed and found to have an average crude protein content of 28.4 ± 1.8% (range 24.5 to 33.9%). From these samples,…

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Amino acid metabolism and whole-body protein turnover in lambs fed roughage-based diets: 2. Methionine metabolism and a compari

  • 1992
  • Issue: 6
  • Volume: 22
P.B. Cronjé, J. V. Nolan and R.A. Leng Page: 201 - 206

The effect of protein supplementation of a wheat straw diet on the metabolism of lysine, leucine, methionine and urea,  and on whole-body protein turnover rate was investigated in lambs. The metabolism of lysine and leucine is reported elsewhere (Cronje et…

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Breeding objectives for Angus and Charolais specialized sire lines for use in the emerging sector of South African beef producti

  • 2007
  • Issue: 1
  • Volume: 37
M.D. MacNeil and L.E. Matjuda Page: 1 - 10

Breeding indigenous cows to terminal sires may facilitate production of calves in the emerging sector that better meet commercial feedlot requirements. Thus, the objective of this research was to develop breeding objectives for Angus and Charolais terminal sires to be…

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Analysis of growth curves of indigenous male Venda

  • 2007
  • Issue: 1
  • Volume: 37
D. Norris, J.W. N'gambi, K. Benyi, M.L. Makgahlela, H.A. Shimelis Page: 21 - 26

The objective of this work was to estimate and compare the growth curve parameters for live weight of indigenous Venda and Naked Neck chickens and carry out some analyses to test the existence of differences in the growth pattern between…

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Comparison of gene expression patterns between porcine cumulus-oocyte complexes and naked oocytes

  • 2007
  • Issue: 1
  • Volume: 37
G.Y. Zhu, S.T. Feng, J.T. Li, Y.L. Mu, D.K. Pan and B.R. Guo Page: 57 - 63

Several layers of cumulus cells surround the oocyte in the antral ovarian follicle throughout the follicular development until ovulation. The cumulus cells play an important supportive and regulative role in oocyte development and maturation via intercellular communications between oocytes and…

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Effects of dietary energy density and L-carnitine supplementation on growth performance, carcass traits and blood parameters of

  • 2007
  • Issue: 2
  • Volume: 37
M. Corduk, N. Ceylan and F. Ildiz Page: 65 - 73

The present study was conducted to determine the effects of dietary metabolisable energy (ME) density and L-carnitine supplementation on the performance, carcass traits and blood parameters of broiler chickens. The experiment was designed with three levels of dietary energy (low,…

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Derivation of economic values for the Simmentaler breed in South Africa

  • 2007
  • Issue: 2
  • Volume: 37
J.F. Kluyts, F.W.C. Neser and M.J. Bradfield Page: 107 - 121

The purpose of this paper was to derive economic values for beef production, carcass quality and fitness traits for the Simmentaler breed in Southern Africa. Income was partitioned between weaners, surplus heifers and cull cows. Expenses were calculated for all…

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Proposed economic selection indices for the Simmentaler breed in South Africa

  • 2007
  • Issue: 2
  • Volume: 37
J.F. Kluyts, F.W.C. Neser and M.J. Bradfield Page: 122 - 131

The development of economic selection indices for an integrated Simmentaler production system was described. The breeding objective was defined in terms of production-, functional- and product quality traits. Criteria included in the total index were birth- and weaning weight (direct…

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Plasma free amino acid profiles of Boer goat bucks as influenced by two feeding regimens

  • 2006
  • Issue: 5
  • Volume: 36
A.M. Almeida, L.M.J. Schwalbach, H.O. de Waal, J.P.C. Greyling and L.A. Cardoso Page: 14 - 17

The aim of the study was to monitor the physiological changes in plasma free amino acid profiles in Boer goats under nutritional restriction. Fifteen Boer goat bucks were allocated to two experimental groups: CG (control), fed Themeda trianda hay, supplemented…

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