One hundred pigs were slaughtered sequentially to characterize and quantify protein deposition in two types (lean and obese) and sexes (boars and gilts) of Landrace pigs. The pigs were fed ad lib on a diet containing 18% protein, 1% lysine…
Protein deposition rate was measured in 100 lean and obese pigs of both sexes (boars and gilts) fed ad lib. The intakes of digestible ideal protein (DIP) and deposition rates of body protein was used to calculate conversion ratios of…
The relationship between body measurements and growth test results of Simmentaler bulls. The relationship between body measurements and performance of 664 Simmentaler bulls was investigated. Phase C data from three departmental performance testing stations, namely Irene, Vryburg and Cedara, were…
Factors affecting reproduction in Merino ewes were investigated using data of 7 917 matings of 2 258 ewes in the Tygerhoek flock during the lambing seasons of 1971 to 1984. The ewes were run in a selection trial to evaluate…
Different diets low in lysine were fed to ducklings of various ages in three separate trials to investigate the effect of these diets on bodymass and subsequent reproductive performance. The results showed that when ducklings were fed a diet containing…
Four rumen-cannulated steers were fed a diet consisting of whole maize grain, high protein concentrate and molasses. Two of the four animals received 10% ground Eragrostis curvula hay in addition to the whole maize grain diet. The feeding period was…
The effect of active immunization against androstenedione on reproductive performance was investigated in a flock of 151 Angora ewes. Although differences occurred between groups in some of the reproductive parameters recorded, the eventual number of kids produced was virtually the…
Correlation between parts of the Merino fleece and the subsequent influence on income. The fleeces of 160 one· year old ewes were classed and separated according to the standards of the National Wool Growers' Association into 'fleece wool', BKS…
The effect of inclusion rate of Eragrostis curvula hay and sunflower husks on milk production and milk composition of first-calf Friesland cows. The effect of different inclusion rates of Eragrostis curvula in complete diets on the milk production and milk…
Silkiness and elasticity as breeding aims in Karakul lambs. Descriptions of existing pelt characteristics for 1083 Karakul lambs were examined and general hair quality as well as the hair texture of the body and extremities was evaluated and grouped in…
A high density fish polyculture investigation was conducted during the summer season of 1984-1985 at the Umtata Dam Fish Research Centre, Transkei . Fish species used, included the cross-breed between the Israeli Dor 70 and the Aischgrund varieties of the…
The determination of a rate constant for the outflow of chromium-mordanted protein particles from the rumen of lactating dairy cattle. Lactating Friesian/Holstein cows were used for the determination of the outflow rate of protein particles from the rumen. Fishmeal was…
A trial was conducted to determine the efficacy of dietary molybdenum (Mo) and sulphur (S) in reducing liver copper (Cu) levels in sheep at risk of Cu toxicity. Sheep were fed 75 mg Cu/day during a preliminary period…
Forty-five adult SA Mutton Merino ewes and 36 eight-month-old ram lambs were divided into three groups so that each group contained an equal number of animals of each haemoglobin type AA, AB and BB. Three diets were compiled…
Forty-five SA Mutton Merino ewes, 2 to 5 years of age, were divided into three groups. Although all ewes received the same basic diet, the diet of one group (group M) was supplemented with molybdenum and that of another group…
A simplified method, whereby tick resistance in cattle is assessed by counting all ticks under the tail and on the scrotum or udder only, was compared to the Australian method, where tick resistance is assessed by counting successful females on…
An experiment was conducted to (i) determine the effect of heat treatment and thermal ammoniation on dry-matter digestibility and true metabolizable energy content of high-tannin grain sorghum in a digestion trial with roosters and (ii) to determine the relative nutritive…
In a chick growth assay over a 10-day period, no significant difference could be established between the effects of DL methionine, methyl maleic methionine and the methyl hydroxyl analogue of methionine on growth rate and efficiency of feed conversion. However,…
