The reproductive potential of Dohne Merino ewes in an accelerated breeding system. Between 1967 and 1975 Dohne Merino ewes were kept on pastures and subjected to an accelerated breeding system at 8-month intervals. Both management and feeding programmes were improved…
The reproductive potential of Dohne Merino ewes in an accelerated breeding system. Between 1967 and 1975 Dohne Merino ewes were kept on pastures and subjected to an accelerated breeding system at 8-month intervals. Both management and feeding programmes were improved…
The effect of the standard of excellence for breed characteristics in Afrikaner cows on the pre-weaning performance of their calves was investigated. According to an analysis of variance, the standard of excellence for the head and horns had a statistically…
Five groups of seven Friesian bull calves received different combinations of soybean flour (S), whey powder (W), and preserved colostrum (C). On a dry matter basis, the experimental diets consisted of 20% S, 60% W, and 20% C (Treatment 1);…
A digestion and a growth trial was conducted, (i) to determine the effect of sodium hydroxide (NaOH) treatment of bird-proof sorghum (BPS) on nitrogen and energy digestibility, and (ii) to compare treated with untreated BPS as grain components in a…
A nitrogen-balance study was carried out to investigate the utilization of various levels of urea (0 - 4%) absorbed by alkali-ionophore-treated whole maize when fed to Angora goats receiving a protein-deficient roughage diet. Nitrogen retention was increased significantly (P<0,05) only…
A simple practical technique is described for the collection of blood samples from at least six cattle concurrently at short time intervals for up to 48 h. The technique is advantageous in that it is carried out under minimum stress…
Beef heifers were fed during late pregnancy to produce cows in poor, average, and good condition at calving late in winter. The animals were fed on dry-lot for the major part of the experiment. At 50 days of age half…
Fifty-four beef bulls with an average age of 21 months and representing nine breeds were evaluated for libido using two types of tests. The serving capacity (SC) test was repeated five times on groups of bulls and was followed by…
Plasma progesterone and LH profiles in dairy heifers following oestrus synchronization with PGF2α and GnRH. Oestrus synchronization was accomplished in six Friesland heifers by two injections of PGF2α, 11 days apart. During the ensuing synchronized oestrus, three of the six…
Milled (13 mm screen) maize residue containing 35% moisture was treated with 4% anhydrous ammonia on roughage dry matter in a stack for 50 days. Performance of lambs was measured in a 2 x 5 factorial experiment with two treatments…
The phosphorus (P) status of adult Karakul ewes grazing natural pasture was determined by measuring the P content of blood, saliva, faecal, and bone samples. The ewes were divided into four groups of 20 ewes each, viz. Ewes supplemented with…
Five groups of seven Friesian bull calves received different combinations of soybean flour (5), whey powder 0N), and preserved colostrum (C) until weaning at 30 days of age. A complete diet was available ad lib. from 4 days of age…
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…
Barley as an alternative energy source for maize in diets for growing pigs. Barley was evaluated as an alternative energy source for maize in diets for growing pigs in a digestion and growth trial. Chemical composition of various barley samples…
The effect of different periods (12, 14, 16 or 18 days) of intravaginal progestagen treatment (MAP) and PMSG (300 IU) on synchronization of oestrus in Boer goat does was investigated. No significant difference in oestrous response, follicular activity, ovulation rate,…
The milk production ability of the Improved Boer goat in a grass/bush community. Boer goat does from the Adelaide Research Farm were run on the dry grass/bush community of the eastern Cape . An investigation was undertaken to determine the…
The testosterone response to gonadotropins in Nguni bulls with unilateral gonadal hypoplasia and aplasia was studied. Despite having one grossly affected or totally absent testis, the residual testicular tissue was found to be able to maintain a normal basal serum…
The proportion of eight fatty acids( 14:01, 6:0,1 6:1, 17:0, 17:1,18:01,8 :1and 18:2) was measured in the subcutaneous and kidney fat depots of five groups of Boer goat castrates which had been kept for 90 days on one of five…
Of the many advances in ruminant nutrition made in recent times the change from dilute roughage-based feeds to highly concentrated grain-rich diets has probably had the greatest single impact on ruminants and on their rate of production. This change has…
