The experiment was conducted to compare the mobile nylon bag technique (MNBT) with conventional digestibility techniques for the estimation of digestible energy (DE) in pig diets. Factors investigated were the effect of washing after retrieval, predigestion time, particle size, retention…
Two experiments were conducted to (i) determine the effect of thermal ammoniation (NH3BPS) and heat treatment (HBPS) of birdproof sorghum (BPS) on energy and N metabolism, measured with intact and ileo-rectal anastomosed pigs and (ii) to evaluate NH3BPS and untreated…
An experiment was conducted to evaluate a hetero-yellow endosperm sorghum cultivar (G766W) in comparison to a low-tannin (GL) sorghum cultivar as well as maize in a growth trial using pigs. The digestible energy (DE) content of the experimental diets as…
Levels of sheep and goat production, as well as aspects of the distribution of ownership of pigs and poultry, in three livestock-producing areas of Ciskei are discussed. Findings show low levels of production and reproduction and high mortality rates in…
A group of 82 genetically lean and 90 obese Landrace pigs was allotted to three dietary treatments with lysine concentrations of 1,22 (T1), 1,02 (T2) and 0,83% (T3), corresponding concentrations of crude protein (CP) of 19,7, 16,8 and 13,7% and…
To test whether animals grown under ideal temperature conditions would have different growth parameters to animals grown in more conventional housing, sixty Large White x Landrace male pigs from three genotypes were housed in six temperature-controlled chambers. The results were…
Dispersion parameters for number of piglets born alive (NBA) were estimated using a random regression model (RRM). Two data sets of litter records from the Nemscak farm in Slovenia were used for analyses. The first dataset (DS1) included records from…
Simulation modelling is an active part of animal nutrition which relies on mathematical functions to predict the performance of an animal. The Gompertz equation is one such function that is simple, but fits animal growth data well, and when used…
Two experiments were conducted to test whether young pigs are capable of discriminating against a feed based on its nutrient balance (or protein value) and/or the presence or absence of anti-nutritional factors and whether there is an order of preference.…
Different amounts of hull were removed from sunflower oilcake to obtain oilcake with a protein content of 40% (SFOC 40), 42% (SFOC 42), 44% (SFOC 44) and 46% (SFOC 46). respectively. The increase in crude protein content from 40% to…
Samples of 150 different cowpea cultivars, used in the breeding trials of the Summer Grain Institute at Potchefstroom, were analysed and found to have an average crude protein content of 28.4 ± 1.8% (range 24.5 to 33.9%). From these samples,…
The effect of the halothane gene on certain growth and meat quality characteristics were investigated by comparing the three known halothane genotypes (NN, Nn, nn), fifty nine Landrace x Large White pigs (gilts = 25, castrates = 34; NN =…
The effect of the halothane gene on processed pork characteristics was investigated using the meat from 59 Landrace x Large White pigs of known halothane genotype (NN = 31, Nn = 17, nn = 11). The backs and hams were…
Small-scale farmers in the rural areas of South Africa do not have milling and mixing facilities at their disposal. A study was conducted to quantify the production as well as the energy and nitrogen metabolism of pigs when fed a…
The effect of restricted suckling and split weaning on the reproductive performance of dams and subsequent performance of their litters was studied in an experiment involving 48 Landrace x Large White sows of second and third parity. The sows and…
Components for a simulation model are described to predict feed intake, amino acid requirements and body composition changes over time on the basis of the inherent potential protein growth rate of pigs varying in genotype. The potential protein growth rate…
The effect of cyadox on growth and apparent digestibility of nutrients in weanling pigs was investigated. Cyadox (2-formylquinoxaline-N1,N4-dioxide cyanocetylhydrazone) is a derivative of quinoxaline-1, 4-dioxide, a growth promoting antimicrobial agent that is used in pig production. Seventy-five crossbred weanling barrows…
The responses in growing pigs to balanced diets at different dietary energy levels are estimated from published data after recalculation of digestible energy (DE) levels using standard tables. Although responses in live weight gain (ADG), food intake (FI) digestible energy…
The effect of environmental factors on pre-weaning performance traits was studied using 3556 records collected between 1980 and 1995. Sow performance in terms of number born alive was higher if sows farrowed in summer months of October to April than…
Three diets were formulated to contain 16% crude protein (CP), 12.8 MJ/kg digestible energy (DE) and 0.9% lysine on an air-dry basis. The diets either contained 8.3% fishmeal, 20% faba beans plus 7.9% soybean oilcake meal (SBOK) or 20% low…
