Non-ammonia nitrogen (NAN) passage to the small intestine and disappearance of NAN in that organ have been studied in multi-cannulated sheep on pasture or fed indoors. Forages under investigation included a number of subtropical grasses, foggages and hay, temperate grasses,…
The effect of climatic conditions during summer on different heat tolerance indicators was determined in Friesian and Jersey cows which were kept in open camps with no protection against solar radiation. A complete diet (15.0% CP and 10.8 MJ ME/kg)…
Data of 23 189 Merino ewes (8 farms), 7692 Dohne Merino ewes (3 farms) and 2399 SA Mutton Merino ewes (1 farm) were recorded for the 1988-1991 lambing seasons. The udders of ewes present at lamb marking were inspected to…
Forty-five ewes (29 Romanov X Dorper, 9 Karakul, and 7 Dorper) were divided into four groups, synchronized using progestagen sponges and superovulated with 1000 IU pregnant mare serum gonadotrophin. Sponges were withdrawn on days 13, 14, 15 and 16 (in…
An investigation was conducted to ascertain whether a source of feed lime (Ouplaas lime) high in manganese (5000 mg Mn/kg) is a safe feed ingredient for sheep. Two levels of Ouplaas lime, l% and 4%, were included in a sheep…
The production of volatile fatty acids (VFA) was studied in vitro to assess the possible contribution of microbial fermentation to the energy economy of growing ostrich chicks. Structure, capacity and contents of the gastro-intestinal track were examined to identify major…
The effect of changing dietary energy and crude fibre concentrations on the utilization of metabolizable energy (ME) was investigated in four growing ostrich chicks by addition of lucerne meal to a maize-lucerne based diet. The experiment was carried out in…
Data on cumulative feed intake, growth rate and chemical body constituents of 24 ostrich chicks, from a comparative slaughter experiment, were utilized to describe patterns of efficiency of feed utilization, deposition rates of protein, fat and body energy, as well…
Effects of intratesticularly administered zinc tannate (ZT) on growth performance, sexual development, slaughter, carcass and meat quality characteristics of young bull calves (-225 kg, 7 months old) were investigated. Comparisons were made across a three (treatments: ZT animals, intact bulls…
Different amounts of hull were removed from sunflower oilcake to obtain oilcake with a protein content of 40% (SFOC 40), 42% (SFOC 42), 44% (SFOC 44) and 46% (SFOC 46). respectively. The increase in crude protein content from 40% to…
Genetic trends owing to selection for an increase in pattern and hair quality and a decrease in hair length and curl development in the Karakul were estimated with the Animal Model in four selection lines and in a control flock…
Correlated responses of curl development, hair quality, hair thickness, hair stiffness, hair length, lustre and pattern to selection for an increase in pattern and hair quality and a decrease in hair length and curl development were determined with mixed model…
The suckling behaviour of one- to three-month-old calves, suckled by 66 Hereford, Simmentaler and Hereford X Simmentaler cows, was studied. The most common frequency of suckling in 24 h was 4, and the mean duration of each suckling event was…
For two weeks prior to the start of the breeding season, the suckling behaviour of beef calves, separated from their dams for 12 h out of 24, was investigated. Fifty-six per cent of the 44 cows which were separated from…
The study was undertaken to assess the influence of various environmental effects, e.g. sex, age of dam, month of birth and mating types (black X black, black X grey, grey X black and grey X grey) on pelt traits of…
An investigation was conducted into the effects of two phenolic amines, N -methyl-β-phenethylamine (NMP) and tyramine (T) on corpus luteum function and reproductive performance of Angora goats. Both compounds are widely distributed through the plant kingdom and, because of their…
