Plasma progesterone and LH profiles in dairy heifers following oestrus synchronization with PGF2α and GnRH. Oestrus synchronization was accomplished in six Friesland heifers by two injections of PGF2α, 11 days apart. During the ensuing synchronized oestrus, three of the six…
Milled (13 mm screen) maize residue containing 35% moisture was treated with 4% anhydrous ammonia on roughage dry matter in a stack for 50 days. Performance of lambs was measured in a 2 x 5 factorial experiment with two treatments…
The phosphorus (P) status of adult Karakul ewes grazing natural pasture was determined by measuring the P content of blood, saliva, faecal, and bone samples. The ewes were divided into four groups of 20 ewes each, viz. Ewes supplemented with…
Five groups of seven Friesian bull calves received different combinations of soybean flour (5), whey powder 0N), and preserved colostrum (C) until weaning at 30 days of age. A complete diet was available ad lib. from 4 days of age…
Influence of birth mass on incidence of dystocia in the Northern Transvaal Bushveld. Seven cow herds (Afrikaner, Hereford, Bonsmara, Simmentaler, Hereford x Afrikaner, Simmentaler x Afrikaner, Simmentaler x Hereford x Afrikaner), consisting of 40 animals each, were investigated from 1979…
Radiographic pelvimetry was used to obtain estimated pelvic dimensions for Merino ewes, born in 1981 and available for five lambing opportunities in the Tygerhoek flock. Estimated pelvic dimensions accurately predicted dissected measurements obtained from 37 ewes that were slaughtered, as…
This experiment was conducted to compare carcass and meat quality traits, and muscle fibre characteristics in the longissimus muscle of the Landrace [an European pig breed] and the Lantang [a Chinese native pig breed] at the ages of 60, 90…
The evaluation of sewage sludge as protein source for growing pigs. The utilization of sewage sludge (28% CP) as a protein source in pig growth diets was investigated. Fish meal was replaced by sewage sludge at three levels (0%, 25%…
Two experiments were conducted to evaluate L. albus cv. Buttercup as an alternative to heated full-fat soya bean meal for early weaned piglets. In Experiment 1, the performance of piglets, fed diets with 0%, 4%,8% and 12% lupins and formulated…
Thirty adult Merino rams were fed a ration with a 16% protein and 75% TDN content. Live body mass increased by 51,4% and testes volume by 111,7% in 210 days. Testicular growth responded rapidly to supplementation and testes volume increased…
Straw of maize plants which had been fertilized with 40, 120 or 200 kg N/ha was fed to 27 Döhne Merino wethers in a digestibility trial. Feed residues, faeces and urine were collected over a 7-day period. Intake…
In this investigation, silage made from cattle waste being ensiled with maize residues (ECW), was evaluated with respect to ensiling characteristics and feeding value. Cattle waste was obtained from cows that were finished on a high-concentrate (80%) diet. It was…
A method of processing blood meal in which the nutritive value of the protein is preserved is described, since appreciable losses occur in the nutritive value of the protein when prepared by heat sterilization with drying at atmospheric pressure in…
The effect of replacing O. 33, 66 and 100% of the maize meal with apple residue in a concentrate diet (containing 89% concentrate and 11% roughage) for dairy calves was investigated. Four groups of 10 new-born Friesian bull calves were…
Testis size, stimulated testosterone concentrations and mating performance (serving capacity, libido score and serve : mount ratio) of 14 Dorper rams were measured in the breeding season (March) in order to determine the influence of testis size and testosterone concentration…
Members of the Performance Testing Division of the Merino Stud Breeders Association of South Africa select their young sheep according to a selection index, calculated from objective measurements of the following four characteristics body mass, clean fleece mass, fibre diameter…
The importance and problems of cattle production in Transkei are discussed in this paper. Findings show a situation of low levels of production and deteriorating natural resources owing to mismanagement and overstocking.
A survey of 468 lamb and sheep carcases of various breeds and crosses was conducted to investigate certain carcase characteristics. Carcases in each grade were divided into four mass groups, i.e. 10,1-15 kg; 15,1-20 kg; 20,1-25 kg and >25 kg…
A total of 104 carcases were selected on the market in three age groups and four mass classes representative of the six fat classes of the classification system for carcase evaluation. Four subcutaneous fat thickness measurements were taken on the…
The influence of fatness, conformation and carcase mass as individual predictors of carcase composition, was determined in 104 carcases which were fully dissected and of which carcase composition was determined. Chemical analysis was done on each carcase and…
