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 utilization of urea-supplemented and ammoniated barley straw in sheep. Barley straw treated with urea (75 kg/ton straw) and with anhydrous ammonia (30 kg/ton straw) by the stack and oven methods were compared with urea-supplemented barley straw in an intake…
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…
Influence of microwave and heat treatment in a household oven on the nutritive value of full-fat soy beans as determined by an urease index, the FDNB test for available lysine and a broiler growth test. The microwave treatment of soy-bean…
Fractionation of sunflower oilcake meal and use of the low-fibre fraction together with full-fat soy-bean meal as a replacement for fish-meal in broiler diets. Nutrient concentrations of various fractions of sunflower oilcake meal were studied by sieving the meal through…
Effect of dietary energy concentration on the performance of broilers. The effect of varying ME content between 11,5 and 14,2 MJ/kg feed was studied with broilers in an 8-week trial. Ten treatments were used with dietary ME levels of 11,5;…
A linear discriminant function (LDF) was used to estimate the level of milk progesterone which allowed the best overall classification of dairy cows into pregnant and non-pregnant groups (confirmed by rectal palpation). Progesterone levels were measured in milk samples drawn…
Two of the many factors which may affect the accuracy of pregnancy diagnosis using milk progesterone levels are day of sampling and number of samples taken per cow. These two aspects were analysed using information obtained from progesterone profiles encompassing…
The use of a mathematical programming model for determining optimal nutritional strategy for a dairy cow is described. Mixed Integer Programming (MIP) may be used to fit curvilinear functions, such as the changes in the nutrient requirements of the cow,…
The chemical composition and in vitro dry-matter digestibility (IVDMD) of manure collected from steers fed on a high-concentrate diet were investigated. The influence of the time interval between excretion and freeze drying of manure on its chemical composition and IVDMD…
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…
Influence of birth mass on incidence of dystocia in the Northern Transvaal Bushveld. Seven cow herds (Afrikaner, Hereford, Bonsmara, Simmentaler, Hereford x Afrikaner, Simmentaler x Afrikaner, Simmentaler x Hereford x Afrikaner), consisting of 40 animals each, were investigated from 1979…
Radiographic pelvimetry was used to obtain estimated pelvic dimensions for Merino ewes, born in 1981 and available for five lambing opportunities in the Tygerhoek flock. Estimated pelvic dimensions accurately predicted dissected measurements obtained from 37 ewes that were slaughtered, as…
