Three wether lambs of the Mutton Merino type were kept confined in metabolism cages confined to either a calorimeter or a structure resembling the plant, from about birth to about 36 weeks. Measurements over regular intervals with aid of the…
The effect of protein : energy ratio's in milk replacers based on whey powder as the main energy source was studied. In a digestion-balance trial 9 milk replacers containing decreasing levels of crude protein but increasing levels of high fat…
The optimum level of inclusion of high fat whey (HFW) in calf milk replacers was investigated. In a set of 9 treatments 45 Friesian bull calves( 5 per treatment) were randomly allocated and subjected to a digestion-balance tr al. A…
In order to develop improved lamb production systems off the Dohne Sourveld qualitative and quantitative changes were brought about by either, (l) veld fertilization. (2) mowing or, (3) sod-seeding of lucerne. The production response of lactating ewes which received either…
The apparent and true metabolizable energy concentrations of 22 cultivars of sorghum grains, differing in their tannic ac id content, were determined by feeding samples of the different varieties to adult roosters. A highly significant negative correlation was found to…
Five diets, containing equal amounts (23 %) of crude protein, and different energy concentrations, ranging from 11,5 to 17,0 MJ ME/kg DM, were fed ad lib to 52 Landrace X LargeWhite barrows. Dietary energy content was manipulated by replacing maize…
Diets containing 3 levels of heated full fat soya bean meal (15, 18 and 21%) each supplemented at 5 lysine levels (0,70; 0,75; 0,80; 0,85 and 0.90%) were fed to 60 porkers (30 gilts and 30 boars) in diets, formulated…
Observations of 5 production traits on 4 000 individuals in the Dohne Merino Development Programme were used to estimate correction factors for the influence of age of dam, type of birth (single or twin) and sex of lamb on 5…
Production data of 366 individuals in the Dohne Merino Development programme at the Dohne Agricultural Research Institute, were used for the estimation of the heritabilities of 15 production traits. Halfsib analyses were applied to data corrected for identifiable environmental factors…
The chemically determined fat content (ether extract) and the cuticular structure of the fibres (barbules) of ostrich plumes were related to the 5 standardized categories of subjectively evaluated fatty appearance as used in practice. With regard to the quality traits…
Eighteen beef heifers, representing the Bos taurus (Shorthorn), Bos indicus (Afrikaner) and intermediate (Bonsmara) types, were confined to a pen with floor space of 4,6 m2 per heifer. A similar number of heifers on the veld served as a control…
The object of the study was to determine diet combinations consisting of soybean flour, whey powder and colostrum that can be employed in practice to decrease the pre-weaning rearing costs of dairy calves. In a mixture design experiment the soybean…
The possible replacement of maize with NaOH-treated straw in growth diets of lambs were tested. Four diets with 43; 29; 14 and 0% maize grain and 0; 24; 48 and 72% treated straw were formulated in such a way that…
It has often been proposed that the physical form of the grain supplement could affect the intake and utilization of forages. Suppression of forage intake i)r poor utilization appears to be a function of high fermentation rate which could be…
The possibility of substituting maize for sorghum grain in fattening diets was studied in a digestibility trial with wethers and a growth study with steers. ln die digestibility trial a 6 x 6 Latin square design was used with maize,…
The feeding value of high lysine maize compared with normal yellow maize in the diets of broiler chickens was evaluated in 2 experiments using 2400 chickens in each trial. In the first experiment, although no differences in mass gain or…
