Two trials were conducted to determine the effect of coagulation suppression of milk and milk replacers on apparent digestibility coefficients and body mass-gain of calves. In Experiment 1, two groups of five Holstein bull calves, two to four days of…
Growth was more rapid among grass carp, Ctenopharyngodon idella Val., fed on cabbage, Brassica spp., than among those fed on kikuyu grass, Pennisetum spp. - despite the lower protein content of cabbage (11,9% vs 20,3%). The relative condition factor of…
Elevated rumen ammonia levels in sheep on high nitrogen kikuyu (Pennisetum clandestinum Hochst) grass were indicative of a protein/energy imbalance in the grass. To correct the imbalance, grass containing 22% crude protein required maize meal supplementation of at least 20%…
Two groups of eight Friesland bull calves each were used in the trial. Calves received a commercial, coagulable milk replacer in which casein coagulation either was normal (CM treatment), or was prevented by the precipitation of Ca++ with an oxalic…
Five diets were formulated on an iso-nutrient basis (approximately 12 MJ digestible energy, 16,5% crude protein, 5% non-degradable protein, 33% neutral detergent fibre, 18% acid detergent fibre, 0,8% calcium and 0,3% phosphorus) so that lucerne hay (LH) was substituted by…
The nutritive value of maize residues, presented in three forms to growing Simmentaler steers (250 ± 31 kg), was evaluated by means of a growth and digestion study. The three forms of maize residues evaluated were: (i) selected material which…
The effect of including 20, 30, 40 and 50% Tarchonanthus camphoratus as the sole roughage in a finishing diet for limbs was investigated. Stems (with leaves), not exceeding 12,5 mm in diameter and 600 mm in length respectively, were…
Bana grass (Pennisetum purpureum x P. amerieanum) was compared with kikuyu (P. clandestinum) and forage sorghum (Sorghum bicolor) with respect to quality of samples ;elected by four oesophageally fistulated steers. Hand-cut samples of the three forages were also compared…
The experiment was conducted (a) to determine the relationship between in vitro digestible organic matter (IVDOM) and in vivo digestible organic matter (DOM); (b) to quantify the monthly variation in chemical composition and digestibility of medic pasture; and (c) to…
Three in vivo techniques were evaluated in terms of their suitability for determination of the apparent ileal amino acid digestibility (AID) of protein sources for piglets. The techniques were: ileo-rectal anastomosis (IRA), cannulation at the distal ileum and a slaughter…
A representative sample of mature dry maize plants from a 3-ha stand were separated into the components grain, leaf, stem, cob-sheath, and cob. In addition, a sample representing the total plant was composited. Dry matter (DM) yields, component proportions and…
The n alkane marker (dosed marker, dotriacontane, C32, herbage markers C31, C33 and C35) technique was evaluated for use in feed intake and digestibility studies with horses. The mean retention time of digesta in the digestive tract was determined in…
The aim of the experiment was to determine the effect of applying an inoculant and formic acid at commercially recommended rates to big bale silage on the quality, protein and cell wall ruminal degradability and intestinal digestibility of undegraded protein…
The aim of this study was to evaluate the suitability of Illius and Gordon's simulation model for predicting the digestibility and intake of tropical roughages by ruminants. Data from seven suitable empirical studies (i.e. studies that reported all requisite data…
The potential of red vine husks and pips as a component of animal feed was investigated. Twenty-five Dohne Merino ram lambs (mean live weight ± s.d. = 41.4 ± 2.3 kg) were used. A completely randomised design was used and…
Three ruminally cannulated mature steers were fed, in a crossover design, diets with concentrate to roughage (C: R) ratios of 80: 20, 55: 45 and 30: 70, twice a day (09: 00 and 15: 30) in a predetermined feed intake…
A study was conducted to determine the effect of quantity and physical form of maize bran (CB) in diets of goats, on intake, digestibility and rumen fermentation. Sixteen male American Alpine goats weighing ca. 24 kg, were randomly assigned to…
The aim of this trial was to determine the water intake of Tswana goats and investigate the effects of short term water deprivation in summer or winter (6000 ml water offered either once every 72 h, 48 h, 24 h…
Acacia karroo Hayne is the dominant invading species in semi-arid savannas of South Africa and is an ecological threat of our modern era. This study investigated the preference and intake rates by goats when fed A. karroo coppice sprouts of…
Thermo-ammoniated maize residues supplemented with 1% urea (Diet 2) or 4.5% fish-meal (Diet 3) and untreated maize residues supplemented with 2% urea (Diet 1), were compared on an isonitrogenous base. The in vitro dry matter digestibility for Diets I, 2…
