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Effects of stocking rate and burning frequency on Brachystegia/Julbernardia veld in Zimbabwe
J.N. Boultwood,M. G. W. Rodel +1 more
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It was concluded that resting the veld annually in the growing season and grazing only in the dry season is a simple and effective way of managing veld in the high rainfall areas of Zimbabwe.Abstract:
Brachystegia/Julbernardia veld was protected in the growing season and grazed by cows in the dry season for 60, 90 and 120 grazing days per ha per annum in combination with burning in the late dry season either annually, biennially or triennially. After 14 years of treatment there was evidence of a distinct improvement in grass species composition and in basal cover of grasses. While on veld cows were fed 800 g of cottonseed meal per head daily, and on average lost 4,38 kg in body mass per head per season. Burning at all frequencies reduced the number of trees and stunted their growth but the dominant species Brachystegia boehmii was reduced only by annual burning. It was concluded that resting the veld annually in the growing season and grazing only in the dry season is a simple and effective way of managing veld in the high rainfall areas of Zimbabwe where cultivated pastures are used for grazing during the growing season.read more
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Plant trait responses to grazing – a global synthesis
Sandra Díaz,Sandra Lavorel,Sue McIntyre,Valeria Falczuk,Fernando Casanoves,Daniel G. Milchunas,Christina Skarpe,Graciela M. Rusch,Marcelo Sternberg,Imanuel Noy-Meir,J. Landsberg,Wei Zhang,Harry Clark,B. D. Campbell +13 more
TL;DR: This research attacked the mode of action of determinants of disease by studying the response of the immune system toAgentes exactas fisicas y naturales to disease-causing agents.
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The miombo in transition: Woodlands and welfare in Africa
TL;DR: The Miombo in Transition is a resource for researchers, with over 250 pages reviewing and synthesising over 400 studies as mentioned in this paper, which is used to identify key issues for research and facilitate formulation of new management strategies, policies and institutions.
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Bush encroachment in southern Africa: changes and causes
TL;DR: In this article, a review of 23 studies showed that the rate of woody cover change has ranged from −0.131 to 1.275% y−1.5%.
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SPECIAL SECTION: LAND USE OPTIONS IN DRY TROPICAL WOODLAND ECOSYSTEMS IN ZIMBABWE: A simulation model of miombo woodland dynamics under different management regimes
TL;DR: In this article, the authors describe a dynamic simulation model of key ecological processes in miombo woodlands and examine the ecological and economic impacts of various forms of management, showing that removing harvestable trees and reducing the level of grazing by livestock causes an increase in grass fuel loads and a corresponding increase in the frequency of fires.
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The utilization of low quality roughage by sheep.
TL;DR: The work has reached a stage where large scale field studies should be undertaken, but already sufficient progress has been made to indicate methods of feeding large numbers of sheep in confined areas under severe drought conditions.
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