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Browsing Theses and Dissertations (University of Pretoria) by Subject "Dairy cows"
Now showing items 1-8 of 8
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(University of Pretoria, 2012)Rumen protected methionine has been used in an effort to improve the amino acid composition of metabolisable protein since the early 1960’s. The positive response in dairy cows in terms of milk protein composition and milk ...
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(University of Pretoria, 2008-09-23)Rumen acidosis is a metabolic disorder of ruminants, characterized by a severe drop in rumen pH. This is due to an accumulation of acids, especially lactic acid in the rumen. Lactic acid is one of the strongest acids with ...
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(University of Pretoria, 2013)Ruminant feed supplements are price sensitive and are effected by the continuous fluctuation of other raw material feed prices. Therefore, improving the efficiency of production and reducing cost of supplement concentrates ...
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(University of Pretoria, 2009-04-15)Published research suggests that it might be beneficial to increase the amount of rumen undegradable protein (RUP) that passes out of the rumen, through manipulation of rumen fermentation to establish a lower rumen pH. To ...
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(University of Pretoria, 2009-09-16)The widespread increase in use of maize-based feedstuffs in California dairy cow rations has raised concerns of reduced efficiency of CP utilization due to the low lysine content of maize and maize by-products. The objectives ...
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(University of Pretoria, 2008-08-19)Rumen-undegradable protein might be the first limiting nutrient for high producing dairy cows receiving high levels of maize supplementation while grazing pasture. To test this hypothesis two trials were conducted using ...
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(University of Pretoria, 2012-11-09)Milk fever (parturient paresis / hypocalcaemia) is a metabolic disorder that usually occurs near parturition and at the onset of lactation in high producing multiparous dairy cows. Milk fever can indirectly contribute to ...
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(University of Pretoria, 2011-03-16)This experimental work investigated the development and testing of a controlled release system for methionine. Methionine is one of the limiting amino acids for the milk production in dairy cows. The quantities of methionine ...
Now showing items 1-8 of 8