The essential amino acid (EAA) composition of the carcass and duodenal digesta content of South African Mutton Merino ram lambs, fed a standard total mixed diet high in rumen degradable protein (RDP), was investigated. The standard diet consisted (%) of…
The essential amino acid (EAA) composition of the whole empty body of South African Mutton Merino ram lambs fed a standard diet was investigated. The standard diet consisted (%) of 30 lucerne, 8 wheat straw, 56.25 maize meal, 3.5 molasses…
A study was undertaken to compare the effectiveness of three different selection strategies in increasing weaning weight of a Dorper flock under natural conditions. Data were analysed by mixed model procedures. Direct selection for weaning weight under natural conditions proved…
The effects of feeding diets containing different levels of raw cowpea on the histomorphometry of the small intestine and faecal composition were investigated in weaned piglets. A total of 100 21-day-old weaners were divided into five equal groups and were…
The nutritive value of Exalta was compared with Midmar in a grazing trial with lambs and in a digestion trial with mature wethers. The study was conducted between 17 August and 8 October 1993. Fifteen lambs per cultivar grazed the…
This study was conducted to determine the status of Salmonella during the processing of ostriches to ostrich meat and products. When a total of 1429 samples, collected from fillet, liver, gizzards, blood meal, skins, heart, faeces, large and small intestines,…
The effect of the halothane gene on certain growth and meat quality characteristics were investigated by comparing the three known halothane genotypes (NN, Nn, nn), fifty nine Landrace x Large White pigs (gilts = 25, castrates = 34; NN =…
The aim of this study was to determine the potential of Smuts finger grass as summer grazing for sheep on two soil types at different stocking rates and fertilization levels. The four seasons during which the trial was executed, were…
During 1993, different ratios of cattle : sheep grazed maize-crop residues at the Dundee Research Station. The treatments comprised cattle only (T1; 8 heifers), high cattle : low sheep (T2; 6 heifers : 8 wethers), low cattle : high sheep…
Estimated breeding values and genetic trends were obtained in Ayrshire cattle by using DFREML procedures for 9 050 first lactation records calving down from 1977 to 1992. Environmental trends were calculated as the difference between the phenotypic and genetic values…
For the estimation of additive and error variances and resulting heritability estimates 9 050 first and 5 541 second lactation records were used. Analyses were conducted using DFREML procedures. The heritabilities for first (and second) lactation for milk, fat and…
Three Pennisetum selections, Bana, Greengold and Pennaris, were evaluated asforage for sheep. Dry matter yield, 1eaf:stem ratio and intake were determined at two regrowth heights, namely 300 mm and 800 mm. The trials were repeated in autumn, spring and summer…
In this study economic weights for production and functional traits of the HolsteinFriesians in South Africa were calculated using a simulation model. The production traits were milk, butterfat, protein and lactose yield and the functional traits included feed efficiency, survival…
The isozymes described in this study provide the first account of the amount, patternand distribution of genetic variation within this genus. Twenty-five enzyme coding loci in two populations of H. vittafus, from Namibia and South Africa, were analysed by horizontal…
Six indigenous (Pedi) goat wethers (18 months old) with an average body mass of25.1 kg were fed five diets, consisting of a mixture of lucerne (Medicago sativa) and teff (Eragrostis teff) in a cafeteria style arrangement (Trial 1). The diets…
The performance of young cattle, grazing Coastcross 2 (a cynodon hybrid) was studied at two sites in the Eastern Cape (Republic of South Africa). The rainfall and the fertilization rates at the two sites differed. Three stocking rates were applied…
The performance of 98 Merino weaner lambs at two stocking rates (55 and 68 lambs/ha), with access to either no supplementation, 250 g molasses meal/lamb/day or 250 g molasses meal plus 35 mg ionophore (lasalocid)/lamb/day, with or without a growth…
The selenium (Se) status of lambs grazing kikuyu (Pennisetum clandestinum) or ryegrass (Lolium multiflorum) in the KwaZulu-Natal Midlands was determined during four trials and their growth response to Se supplementation was measured. Two methods of Se supplementation were evaluated using…
The investigation entailed four trials in which selenium (Se) was supplemented to lambs grazing kikuyu (Pennisetum clandestinum) pastures during two summer periods or Italian ryegrass (Lolium multiflorum) pastures during two winter periods. Two methods of supplementing the lambs were tested,…
