Six groups of 45 Karakul ewes were treated with 40 mg MAP sponges inserted for 15 days. Five of these groups also received 400 IV PMSG on the 13th day. All the ewes were inseminated 12 h after the onset…
The mean plasma ionized calcium in 35 normal lactating ewes was 4,25 ±0,49 mg/l00 ml (1,06 ±0,12 mM/l) and in 26 normal single 21-28 day old suckling lambs was 4,47 ±0,65 mg/100 ml (1,12 ± 0,16 Mm/1). On average this…
The influence of different levels of Ca and P upon Mg metabolism in sheep: Nine treatments of CaoP0, Car,Pr, Pd, Cad, (CaP)r, Cadpr (CAP)d and CarPd (o = no supplementation; r = to the rumen and d = to the…
Oestrus was synchronized outside the normal breeding season in two groups of 25 and 30 dry Africander cows respectively by administration of progesterone in oil + PMS (group I) and progesterone in oil + prostaglandin + PMS (group II). 76,0%…
Total net energy retention was determined on 27 Dormer X Merino weather lambs by means of the tritiated water space method whilst the digestibility of the nine experimental rations was determined simultaneously. Net energy requirements for maintenance (NEm) and production…
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…
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…
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…
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 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…
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…
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 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…
Ninety eight lactating Bonsmara cows were divided into an experimental group of 66 and a control group of 32 cows. The 66 cows were synchronized by means of the interrupted method of progesterone administration and thereafter inseminated during the first…
The effect of time of evisceration on pH and certain other characteristics of pork muscle. During surveys at pig slaughter centres In South Africa. it was noted that at some centres the carcasses were eviscerated within 8 min. post mortem…
