Thirty Holstein cows in early lactation were used in a randomised complete block design to compare a lysine deficient diet, which was sufficient in methionine, to the same diet supplemented with a rumen protected lysine product. The lysine supplementation resulted…
A total of 79687 (after editing) first lactation records for milk (MY), butterfat (BFY) and protein (PRY) yield, as well as butterfat (BFP) and protein (PRP) percentages were obtained from the South African Holstein Society for animals that were registered…
The purpose of this study was to estimate genetic and phenotypic parameters for gestation length and birth weight in Bonsmara cattle in South Africa. A total of 26962 gestation length and birth weight records for the period 1989 to 2000…
Although fire is regarded as a natural factor in the environment of southern Africa, accidental fires in arid and semi-arid areas influence the fodder flow planning in both agricultural and conservation areas. The short-term impact (two years) of an unplanned…
Due to the regular occurrence of drought in southern Africa, there is a need for more research on drought tolerant plants such as Opuntia species. This study aimed at quantifying the effects of water stress on the growth of tap…
A study was conducted to determine the effect of dietary energy and protein concentrations in a 3 x 5 factorial experimental design on the performance of growing and finishing ostriches. Energy concentrations amounted to 8.5, 10.5 and 12.5 MJ ME/kg…
This study was performed to determine the effect of dietary energy concentrations (7.5, 9.5 and 11.5 MJ ME/kg feed) and dietary protein concentrations (80, 100, 120, 140 and 160 g protein/kg feed) during the finisher stage on the meat, skin…
An experiment was conducted to compare body weight from birth to yearling age and pre-weaning and post-weaning growth rate of purebred Menz (MM), Corriedale x Menz (CM) and Awassi x Menz sheep (AM) under conditions where natural pastures were either…
Weaning weight (WW) records were used to investigate the presence of a genotype x ecological region interaction as well as the magnitude and significance of such an interaction. Records from herds were allocated to one of three veld types that…
The effects of weaning calves at 180 days (early weaning – EW) or at 240 (control – CW) days following restricted suckling (RS) or unrestricted suckling (US) on the post-partum reproductive performance of cows and calf growth rates were investigated…
The germination potential of seed banks along a degradation gradient in a semi-arid grassland in South Africa was quantified in a greenhouse experiment. Soil samples were collected to a depth of 50 mm in late June 2000 from four sample…
Production traits of chickens of the Lesotho line, namely: body weight, body weight gain, feed conversion ratio (FCR) and mortality, were compared with four South African indigenous lines (Ovambo, Potchefstroom Koekoek, Lebowa-Venda and Naked Neck) and two exotic lines (Rhode…
Diets with three energy concentrations and five protein concentrations, structured in a 3 x 5 factorial experimental design, were formulated for the pre-starter (2 – 10 kg), starter (10 – 30 kg), grower (30 – 60 kg) and finisher phases…
