An experiment was conducted with eighteen rumen cannulated sheep fed on a chopped lucerne diet. Previous level of intake significantly influenced the level at which sheep initially established voluntary feed intake. This difference had disappeared after three weeks on an…
Treatment of oat grain by anhydrous ammonia at levels of approximately 0,75; 1,5 and 3,0% was investigated. Diets consisting of untreated oat grain and oat grain ammoniated for 24 hours at 90°C in an AN-STRA-VERTER® -oven at the respective treatment…
The influence of weaning age on the efficiency of an accelerated mating frequency with sheep. One hundred late pregnant South African Mutton Merino ewes were divided into two comparable groups (an early and a late-weaning group) of 50 animals each…
Reproduction data of 839 Dormer and 741 SA Mutton Merino ewes were analysed in order to evaluate certain conventional selection criteria for reproduction rate in sheep. Results indicated that, although a positive response in reproduction rate can be expected for…
Sixty Merino lambs were randomly allotted to one of six feeding levels. The feeding levels were: ad libitum (control) and 0,82; 0,72; 0,65; 0,55 and 0,45 of ad libitum. Feeding levels were calculated from the average weekly feed intake of…
Sixty Merino lambs were randomly allotted to one of six feeding levels. The feeding levels were ad libitum (control) and 0,82; 0,72; 0,65; 0,55 and 0,45 of ad libitum. The feeding levels were calculated from the average weekly feed intake…
Twenty one pairs of twins, all progeny of one sire, of which one was a male and the other a female, were weighed monthly from 3 to 14 months of age. Scrotal circumference (SC) and testes v61ume (TV) in rams…
The performance in terms of bodymass and reproduction of two groups of free-grazing Dorper ewes, with (+ P) and without (- P) phosphorus (P) supplementation, was investigated over 4,5 years at Armoedsvlakte (notorious for its P-deficient soils) to establish whether…
Forty-five adult SA Mutton Merino ewes and 36 eight-month-old ram lambs were divided into three groups so that each group contained an equal number of animals of each haemoglobin type AA, AB and BB. Three diets were compiled.…
Acacia tortilis twigs with leaves or seedpods, from the Tugela valley, were milled and fed to five two-tooth wethers for 6 days in separate digestion trials, after a suitable adaptation period. The twigs with leaves contained 10,8% CP…
The use of intravaginal progestagen sponges (MAP or FGA), 300 or 500 IV PMSG, and implementation of one or two inseminations following synchronization, were evaluated in 600 Merino ewes with a mean body mass of 30,6 kg, outside the normal…
Digestibility or diets containing cottonseed and the effect or supplementary lanolin thereon in sheep. The apparent digestibility of nutrients in four diets (A, B, C and D) containing 0, 10, 15 and 20% whole cottonseed respectively, was determined in sheep…
Levels of sheep and goat production, as well as aspects of the distribution of ownership of pigs and poultry, in three livestock-producing areas of Ciskei are discussed. Findings show low levels of production and reproduction and high mortality rates in…
In one experiment the effects of casein in the abomasum was compared to isonitrogenous quantities of casein or urea in the rumen. In another two experiments the effects of casein in the rumen or abomasum were compared to isocaloric quantities…
A low quality Eragrostis curvula hay was supplemented with 30 or 80 g casein in the rumen with or without 70 g casein in the abomasum, and a medium quality E. curvula hay with 30 g casein in the rumen…
Fermentation in the rumen, measured by a steady state in vivo method, was compared to in sacco estimates obtained by different methods of calculation. These methods included a first-order model calculated over 24 h, a first-order…
Evaluation of the Finnish Landrace x Merino and Merino as ewe lines in crosses with five ram lines. Survival and growth. Finnish Landrace x Merino (F x M) and Merino ewes were evaluated against each other as dam lines in…
Influence or maize supplementation and stocking rate on production or ewes and lambs on winter sourveld: Body mass changes of lactating ewes and lambs with different types of maize supplements on winter sourveld were investigated over three consecutive seasons in…
The experiment was conducted to (i) determine the excretion pattern of an indigestible marker for sheep, (ii) compare three different techniques used to determine intake, (iii) determine the crude protein (CP) and digestible organic matter (DOM) intake of wethers and…
Dohne Merino wethers grazed crop residues of lupins, dry beans, soybeans, sunflower, sorghum and maize at a stocking rate of 10 wethers / ha. Three wethers in every treatment were oesophageally fistulated and during sampling periods the other seven were…
