Fractional rate of degradation (kd) of fermentable nutrients in the rumen is an important parameter in modern feed evaluation systems based on mechanistic models. Estimates of kd for starch was obtained on 19 starch sources originating from barley, wheat, oat,…
Records of the Elsenburg stud where the Dormer sheep breed originated in 1941, were analysed from 1941 to 1990 to investigate non-genetic factors contributing to early growth traits. The fixed effects, identified as having a significant (P < 0.01) effect…
Signalgrass is largely planted as cultivated pasture in Brazil, but no management targets have been identified. The objective of this study was to evaluate daily herbage accumulation rate (HAR) in Signalgrass pastures grazed at two intensity x two frequency treatments…
The effects of some alternative feed additives for antibiotic growth promoters on performance and some slaughter characteristics were examined in broilers fed wheat-soya based basal starter and finisher diets. A total of 2160 one-day-old male broiler chicks were randomly allocated…
Irrigated tall fescue (Festuca arundinacea: Schreb) was evaluated over four seasons, in the spring and autumn, and was able to maintain a milk production of 15.5 kg FCM/d for medium-sized(550 kg) Friesian cows in mid-lactation, under a lax grazing programme…
DNA polymorphisms that can be detected by restriction endonucleases are valuable in population and linkage studies. In this manuscript we have reported on the occurrence of DNA polymorphisms in a defined region of the bovine thyroglobulin gene. We have shown…
The effect of diets with three divergent concentrate to roughage (C : R) ratios (80: 20, 55: 45 and 30: 70), fed at three feed intake levels (ad libitum, 90% ad libitum and 80% ad libitum), on carcass composition…
Optimal levels of crude (CP) and undegraded (UDP) dietary protein were studied in feeding systems based on whole maize fed free-choice and on complete mixed diets composed from by-products of the milling industry. On the whole maize free-choice system, animal…
It has been proposed that the abortions, cold-stress fatalities, and slow growth rates typical of the South African type of Angora goat can be explained by congenital adrenal hypofunction incident to genetic selection for hair production. The aim of this…
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…
In this study the production performance of lactating dairy cows receiving varying levels of oat silage (OS) and lucerne hay (LH) was determined as well as the maximum inclusion level of OS. Oats was ensiled in the soft dough stage…
Vitrification may alter the cytoskeleton (microtubule, meiotic spindle, microfilament, etc.) and the subsequent fertilization rate of in vitro derived bovine oocytes. This study was conducted to evaluate the effect of vitrification and post-thawing incubation periods on the cytoskeleton and fertilization…
