Evaluation of differential energy and protein supplementation to maize silage for slaughter lambs An investigation was conducted into the effects of dietary protein and energy content as well as protein source in slaughter lamb production on maize silage plus maize…
The amino acid composition of 14 different feed ingredients used in a local feed mill were determined on replicate samples drawn from the mill at intervals over a period of 18months. For each ingredient the mean and standard error of…
Twenty-four Hereford oxen were used in a 2 X 2 factorial arrangement of treatments in order to investigate the response in terms of gain and efficiency of feed conversion to the inclusion of monensin and sodium bicarbonate (NaHCO3) in a…
Keywords: Sorghum, tannin, formalin, rumen, digestion Â
The optimal inclusion rate of sunflower oilcake meal and lysine in pig growth diets: Thirty-five diets (7 inclusion rates of sunflower oilcake meal between 15 and 33 percent, each with 5 lysine levels between 0,68 and 0,85 percent), consisting of…
A trial was conducted in which the rations of sheep were supplemented with different levels of Cu and Mo. The S intake was kept constant at 2,1 g/sheep/day. Two levels of Mo were fed, viz. 38 mg/sheep/day for 92 days…
Different levels of dietary S were supplied to sheep receiving high levels of Cu (55 mg/sheep/day) and Mo (34 mg/sheep/day) in their rations. At S intakes of 2,9,4,0 and 5,3 g/sheep/day the hepatic Cu retentions expressed as percentages of total…
Post-partum plasma progesterone concentrations and luteal progesterone content were measured in lactating and non-lactating ewes during a normal breeding season in autumn and an abnormal breeding season in spring. The results indicate that silent ovulations during the autumn breeding season…
The reproductive efficiencies of ewes treated with the intravaginal progestagen sponge (MAP), an intravaginal progestagen sponge (MAP) followed by an injection of cloprostenol (125 μg), a double injection of 250 μg cloprostenol at a 9-day interval and a control group…
In a 2 x 2 factorial experiment fertility has been compared after insemination on observed oestrus, and insemination on a time basis. It was done on 10-day intervals. A group of progestagen sponge (MAP) treated ewes was compared following insemination…
The reproductive efficiencies of ewes treated with two injections of prostaglandin (cloprostenol) administered at intervals of either 9, 10 or 11 days, were compared. The conception rate of ewes in these treatment groups was 11,1%, 40,0% and 70,0%, respectively and…
Pharmacological suppression of prolactin release has been shown to have a stimulatory effect on ovarian activity during the post-partum period in some species other than the bovine. This trial was designed to test the effect of treatment with bromocryptine on…
Records on body mass and reproductive performance of 920 Sussex type cows, ranging in age from yearlings to adults (5 years and older) were examined for relationships between body mass (X) and conception (Y). The data was obtained over a…
A study of the abrasion losses of claws obtained from different breeds did not confirm the hypothesis that dark pigmented claws are more resistant than light pigmented claws. It could be shown that factors such as the moisture and the…
Keywords:Â Reproduction, Angoras
Keywords: GnRh, insemination, dairy cattle
Over a 6 year period, the effects of mating heifers to calve for the first time at 2 or at 3 years of age were studied. Over 3 repetitions of the experiment the average per cent first conception, re-conception and…
A commercial conductivity detector was used to monitor the changes in the conductivity of the cervical mucus in Mashona and Afrikaner beef cows synchronised with cloprostenol in an attempt to predict the optimum time for artificial insemination. The recorded conductivity…
Factors influencing preweaning growth were investigated in a crossbred beef herd reared under intensive pasture conditions. 8731 records were analysed within two farms using the method of least squares. The effect of sire breed, type of dam, age of dam,…
