A comparative study of fish meal, sunflower oilcake meal and formaldehyde treated sunflower oilcake meal as protein supplements for sheep Whilst the nitrogen in six low protein high energy supplements (14 % CP) to sour grass-veld hay originated from either…
Effect of adding urea, limestone or biuret to maize silage cut at two stages of maturity: Dry matter digestibility of maize silage ensiled three weeks later than the hard dough stage (42,6 % dry matter) was higher than that of…
Digestibility and voluntary intake trials were undertaken with S.A. Mutton Merino wethers fed a basal diet of milled lucerne and oat hay (control diet) to which various proportions of milled Prosopis juliflora pods were added up to 100% replacement. Ad…
An experiment is described in which three diets differing in protein and energy content but having a constant energy:protein ratio, were each fed to three groups of broiler chickens to four weeks of age. The three groups on each diet…
Certain facets of comparative beef production from bulls, steers and heifers were investigated. Growth rate, final carcass mass, efficiency of feed utilization and several carcass measurements served as parameters for the purpose of comparison. From birth to twelve months of…
The urea dilution technique for the determination of body water and body fat in vivo was compared with the tritiated water dilution technique with respect to accuracy. ease of determination, costs, and application possibilities. Nineteen sheep were used in the…
Some aspects of the effect of supplementary energy and/or protein, strategically provided to steers on summer veld, were investigated. 40 Friesland steers in the age group 12 to 18 months were divided into four groups and received the following treatments…
Although molasses is extensively used in the animal feed industry in South Africa, there are conflicting views on its value as an energy source, Because of its low cost in relation to that of maize and in view of the…
The influence of milking interval on milk production The influence of milking intervals of 12, 16, 20 and 24 hours on milk production was studied in 24 Friesian cows for an experimental period of 60 days. Milk, fat and protein…
The influence of different protein and energy levels and ratios in the diet of the reproducing sow: A total of 64 Landrace gilts, initially between seven and eight months old, were used to study the effect of two dietary energy…
120 Lactating Karakul ewes were randomly divided into 12 equal groups. Two main groups nursed lambs until medroxiprogesterone acetate impregnated sponges (Repromap, Upjohn) were inserted at 28, 38 and 48 days post partum (non-lactating) or until 90 days post partum…
Four fish meals were subjected to a Nett Protein Utilization (NPU) study of which two were then tested in broiler rations. The NPU values revealed significant differences between fish meals but the broiler growth rate failed to indicate differences in…
The approximate method for calculating coefficients of inbreeding from pedigrees presented by Wright & McPhee (1925). Is generalized to accommodate different methods of sampling random lines of descent.
In a study aimed to establish whether prolactin secretion in lactating ewes influences the release of LH, and the response of the ovary to gonadotropin stimulation, 20 Merino ewes which lambed over an eight-day period were divided into two comparable…
The inheritance and interassociation of the breed characteristics of 383 Afrikaner cattle were studied. The estimates of heritabilities of the different breed characteristics were as follows: 0,187 for quality; 0,203 for middle quarters; 0,281 for front quarters; 0,440 for head…
The effect of shortening gestation with hormones on pelt characteristics of Karakul lamb: Two hundred and eighty two pregnant Karakul ewes were used in an experiment which was conducted with ewes mated out of the normal breeding season (October to…
