The effect of increasing the non-protein nitrogen content of low-fibre finishing diets on the meat quality of South African Mutton Merino wether lambs was investigated. Four similar dietary treatments were formulated with different non-protein nitrogen contents (16.6 g/kg, 28.3 g/kg,…
This research was carried out to determine the effects of different additions (urea and molasses) to Italian ryegrass (Lolium multiflorum L.) silage on fermentation, in vitro gas production, microbiological properties, in vitro digestibility parameters, and relative fodder quality (RFQ) in…
This study evaluated the effects of various nitrogen (N) sources augmenting spineless cactus-based diets on intake, digestibility, rumen kinetics and N balance in sheep. Eight rumen-fistulated sheep with an average initial bodyweight of 62 ± 6.83 kg were allotted to…
The study investigated the effects of replacing soybean meal (SBM) with slow-release urea (SRU) on milk production, milk composition, and rumen fermentation of Holstein dairy cows. Sixteen Holstein cows weighing between 550 and 680 kg in mid lactation were randomly…
The aim of this study was to evaluate the effects of commercial toxin binders on growth performance, organ morphology, immunity and serum biochemistry in broilers. Dietary treatments consisted of the negative control (NC): experimental diet with aflatoxin B1 <20 parts…
This study was carried out to examine the degradation dynamics of neutral detergent fibre (NDF) and the profile of volatile fatty acids that originate from the fermentation of buffel grass (Cenchrus ciliaris, L.) with various levels of ammonia in the…
An experiment was conducted to investigate the effect of concentrations of certain blood nutrient-sensitive metabolites and the resumption of postpartum ovarian cyclicity in 16 Sanga cows (mean BCS 5). Blood samples were taken from cows from weeks 1 to 13…
A trial was conducted to determine the possible effects of an easily digestible nitrogen source in the form of urea compared to an undegradable protein supplement, age and birth status on the reproductive performance (ovulation rate and rate of twinning)…
The effect of replacing increasing amounts of cottonseed cake meal with urea in isonitrogenous (40 per cent CP) supplements for growing weaner steers has been investigated over a period of three years. Each year six groups of 30 Hereford x…
Two groups of cows had either free and continuous access to a urea supplement or access to the same supplement for only four days per week. Cows from both projects overwintered on rested summer range while all the cows received…
Eighty-four high- and moderate-yielding Friesland/Holstein cows were divided into four groups and fed ad libitum complete diets with crude protein levels of: Treatment 1, 16% (4 - 33 weeks postpartum), positive control; Treatment 2, 16% (4 - 17 weeks), 12%…
Maize silage is relatively high in energy but low in protein for the normal lactational requirements of dairy cows. Three trials were conducted to compare the use of urea as opposed to natural protein supplements in balancing the…
Three complete diets with crude protein 16% and energy value 9,4 MJ ME/kg DM were formulated using different combinations of high and low-degradable protein sources. Diet A was formulated with only natural protein sources (55% UDP), diet A1 contained 1,6%…
The use of mealie hay as roughage source in lamb finishing diets. The influence of supplementation of mature maize plants (6% crude protein; 11,4 MJ DE/kg) with both energy and nitrogen on production aspects of slaughter lambs was investigated. A…
The influence of energy and nitrogen supplementation of mature maize plants on wool growth of Dohne merino lambs. The influence of supplementation of mature maize plants (6% crude protein; 11,4 MJ DE/kg) with both energy and nitrogen on wool production…
Effect of prolonged treatment of wheat straw with urea or a urea/caustic soda combination during baling on the nutritional value thereof for sheep. A study was undertaken to investigate the treatment of wheat straw with urea or urea plus caustic…
Milk production and milk composition responses to supplementation of Holstein-Friesian cows grazing kikuyu pasture in summer and a combination of annual ryegrass and maize silage in winter with 64 mg/d flavophospholipol were determined. There was no difference in the average…
The aim of this study was to determine whether blood metabolite concentrations in free-ranging indigenous goat are sensitive to expected variations in nutrient supply, and whether they could be used to evaluate different kidding season at two locations subject to…
This experiment was conducted to determine whether selection for fleece weight is accompanied by changes in the efficiency of nitrogen utilization, using Angora and Boer goats as models of animals bred for fleece or meat production respectively. A diet, containing…
Two trials were conducted to determine the effects of rumen degradable protein (RDP) level and source on the duodenal essential amino acid (AA) composition of Dohne Merino wethers. The animals had ad libitum access to wheat straw (32 g crude…
