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Title: Matching feed energy resources to energy requirements of working cattle in semi-arid areas
Author: Israel, Stanley H.
Awarding Body: University of Edinburgh
Current Institution: University of Edinburgh
Date of Award: 2000
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The objectives of this thesis were to test the recommended standards for feeding draught cattle under semi-arid conditions in South Africa; to study the effects of energy supply on work performance; and to explore strategies to improve the effectiveness of supplementary feeding for draught cattle. Four experiments were carried out in South Africa. Experiment 1 studied the energy balance of three teams each of four draught oxen fed at the same level (1.3 x their ME requirement) and assigned to three work treatments. The workloads were: (1) heavy (estimated energy expenditure of 0.9 x maintenance); (2) medium (0.6 x maintenance); (3) low (0.3 x maintenance). Work consisted of pulling sledges loaded differently over different distances for each item. Experiment 2 studied the effect of level energy supply during work on the performance of draught oxen. Six pairs of oxen were assigned to two treatments. In treatment 1 oxen were fed on low energy (0.8 x maintenance) diet during part 1 (week 1-7) followed by a high energy (1.8 x maintenance) diet in part 2 (week 8-13) of the study. In treatment 2 they were fed on the high energy diet throughout. Oxen on both treatments did the same work pulling loaded sledges so that their estimated energy expenditure for work was 0.9 x maintenance. Two experiments explored strategies to improve the effectiveness of supplementary feeding for oxen in semi-arid areas. Experiment 3 assessed two strategies of supplementary draught cattle. In treatment 1 oxen were supplemented for 7 weeks before working and for 7 weeks while working. The supplements were cobmeal (1.5 kg/head/day) and lucerne (0.5kg/100kgLW/day). In treatment 2 the same supplements were fed for the 7 working weeks at twice the amount in treatment 1. Six pairs of oxen were assigned to the two treatments. All oxen were fed on restricted amounts (0.8 x their ME requirements) of Chloris guyana hay. Work done was the same as that of experiment 2.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available