Now showing items 11-20 of 68
The constraining effect of feed bulk on the voluntary feed intake of laying hens.
1. Two experiments were designed to determine a suitable method of measuring and predicting feed bulk, such that this could be used to predict when the feed intake of a laying hen would be constrained by feed bulk. 2. ...
An evaluation of effective energy in the formulation of diets for laying hens.
Emmans (1994) introduced a concept of energy utilisation applied across species, in which a heat increment in feeding is considered to be linearly related to five measurable quantities. Subtracting the heat increment of ...
An investigation into growth in Jersey, Holstein and Hereford heifers on kikuyu pasture (Pennisetum clandestinum) using N-Alkanes to estimate intake and ruminal outflow rate.
The experiment was designed to investigate why dairy heifers perform poorly on kikuyu pasture compared to a beef breed like the Hereford. The main assumption was that the lower growth rate in dairy breeds was due to low ...
The use of choice feeding and mixture experiments to evaluate protein sources used in broiler feeds.
No abstract available.
An investigation of factors influencing rate of lay, egg weight and embryonic growth in broiler breeder hens.
The laying performance of broiler breeder hens is characteristically poor. Of the eggs that are produced, a large proportion are rejected before setting because they are either too small or excessively big, and of the ...
Family poultry studies in KwaZulu-Natal.
This work was in two parts, the first part was an on-farm survey of family poultry production and the second study was on-station research which investigated the replacement of maize by bread waste in layer diets. The ...
Dairy constraint analysis in Eritrea, with special emphasis on Asmara and surrounding dairy farms.
The overall objective of the study reported in this thesis was to assess the existing situation of the dairy sub-sector in Eritrea with special emphasis on the Asmara and surrounding dairy farms. The specific objective ...
The calcium requirement of commercial layer pullets in the pre-laying period.
Specifications for the amount of calcium to be included in feeds for pullets and laying hens vary considerably in the scientific literature. Much of this variation is due to the fact that genetic selection has changed ...
Liver abscesses and performance in feedlot cattle as influenced by dietary roughage level and tylosin inclusion.
The focal interest of this study was the problem of liver abscesses that occurs in intensively fed beef cattle. The literature on metabolic disorders and diseases associated with feeding high concentrate diets to beef ...
Nutritional means of overcoming heat stress in laying hens and broilers.
The relationship existing between the broiler and the laying hen, the methods applied for estimating the effective energy using linear coefficients to five measurable components of interactions and their diet used in ...