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A comparative histochemical study of plant polyphenols in southern African grasses
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: Pascale Chesselet --- , Republic of South Africa MaureenM. Wolfson --- , Republic of South Africa R.P. Ellis --- , Republic of South AfricaRecent anatomical studies have shown that tannin‐like substances (TLS) occur in the epidermal cells of a number of southern African tropical grasses, and the presence of condensed tannins in grasses has been confirmed by chemical analyses. A number of species... -
Effects of nitrogen, phosphorus and potassium nutrition on seasonal tannin content of bush tea (Athrixia phyliciodes DC.)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: P.M. Chabeli --- Department of Plant Production, South Africa F.N. Mudau --- , South Africa P.W. Mashela --- Department of Plant Production, South Africa P. Soundy --- Department of Plant Production and Soil Science, South AfricaThree trials were conducted over four seasons (summer, autumn, winter and spring) to determine the nutritional requirements of bush tea regarding nitrogen (N), phosphorus (P) and potassium (K) and the influence of these nutrients on tannin content of cultivated bush... -
The effect of Browse Plus™ on nutrient intake, rumen pH and digestibility of a sole diet of Leucaena leucocephala forage
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: MM Majuva-Masafu MJ LiningtonThe purpose of this study was to determine the neutralising effect of Browse Plus™ on condensed tannins in a sole diet of Leucaena forage and how that affected feed intake, rumen environment and passage of nutrients. Partial digestion methods were... -
In vitro organic matter disappearance of tanniferous browse using rumen liquid from goats ingesting grass versus browse
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Caroline C Wambui --- Egerton University, Kenya James P Muir --- Texas A&M AgriLife Research, USA John Githiori --- International Livestock Research Institute, Kenya Barry D Lambert --- Texas A&M AgriLife Research, USAIn vitro organic matter disappearance (IVOMD) of African browse species often indicates artificially low nutritive value due to the presence of condensed tannins (CT). Diet of the rumen liquor donor may change this if it contains CT. Leaves from 11... -
Inducible defences in Acacia sieberiana in response to giraffe browsing
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: AD Zinn D Ward K KirkmanAcacia trees comprise a principal component of the diet of many African browsers. The resultant browsing pressure has led to the evolution of both physical and chemical responses in Acacia trees. In an observational study, we investigated the physical and... -
Induced chemical defences in Colophospermum mopane trees
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: DCJ Wessels C van der Waal WF de BoerA field experiment was conducted in which Mopane (Colophospermum mopane) trees were subjected to three different canopy treatments:felling of trees at a mean height of 0.7m above ground level, felling at a height of 2m, or pruning of selected branches... -
Condensed tannins and saponin content in different plant parts of Stylosanthes scabra (Fitzroy) plants harvested from agro-ecologically different sites in Zimbabwe
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: JJ Baloyi T Acamovic M Odoardi N Berardo NT Ngongoni H HamudikuwandaThe objective of this study was to determine the proanthocyanidin (PA; condensed tannin) and saponin contents of different parts of Stylosanthes scabra (Fitzroy) plants harvested from five agro-ecologically different sites in Zimbabwe. Condensed tannins and saponin content of S. scabra... -
Acacia mearnsii industry overview: current status, key research and development issues
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Julian Moreno Chan --- Institute for Commercial Forestry Research, South Africa Philip Day --- NTE Company (Pty) Ltd, South Africa John Feely --- Forestry consultant, South Africa Rob Thompson --- NCT Forestry Co-operative Ltd, South Africa Keith M Little --- School of Natural Resource Management, South Africa Craig H Norris --- NCT Forestry Co-operative Ltd, South AfricaAcacia mearnsii De Wild (black wattle) is an important plantation species for tannin production and woodchip exports in South Africa and Brazil. This study provides an updated overview of the black wattle industries in both countries, including planted areas and... -
Seasonal variations in diet selection of Nguni goats: effects of physical and chemical traits of browse
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Sylvester W Fomum --- Department of Animal and Poultry Sciences, School of Agriculture, Earth and Environmental Sciences, South Africa Peter F Scogings --- Department of Agriculture, South Africa Luthando Dziba --- CSIR, South Africa Ignatius V Nsahlai --- Department of Animal and Poultry Sciences, School of Agriculture, Earth and Environmental Sciences, South AfricaGoats select some browse species more than others, given options. Seasonal trends of diet selection of Nguni goats indexed by intake were investigated in cafeteria-style experiments. The relationships between diet selection and plant chemical/physical traits of Vachellia nilotica, Vachellia robusta,... -
Seasonal diet composition and forage selectivity of Boer goats in a semi-arid gypsophilous grassland
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Miguel Mellado --- Department of Animal Nutrition, Mexico José A Villarreal --- Department of Botany, Mexico Miguel A Medina-Morales --- Department of Animal Nutrition, Mexico José R Arévalo --- Department of Parasitology, Ecology and Genetics, Spain José E García --- Department of Animal Nutrition, Mexico Cesar Meza-Herrera --- University Regional Unit of Arid Zones, MexicoBotanical and chemical compositions of Boer goat diets, determined with repeated collection of forage samples taken from the goat’s mouth, were studied in a gypsophilous grassland during four seasons of the year. Ten pluriparous goats were used to collect selected... -
Effects of pruning on the concentration of secondary metabolites in Colophospermum mopane leaves
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Rudzani A Makhado --- Department of Biodiversity, South Africa Martin J Potgieter --- Department of Biodiversity, South Africa Wilmien J Luus-Powell --- Department of Biodiversity, South AfricaColophospermum mopane, commonly known as mopane, produces secondary metabolites during the growing season. However, there is still insufficient knowledge on the quantity of secondary metabolites and the effect of browsers on the concentration of secondary metabolites. A pruning experiment was... -
Does the presence of tall or dwarf elephant grass genotypes change the nutritive value of butterfly pea in grass–legume intercrops?
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Tafnes Bernardo Sales-Silva --- Federal Rural University of Pernambuco, Brazil Mércia Virginia Ferreira dos Santos --- Federal Rural University of Pernambuco, Brazil Osniel Faria de Oliveira --- Federal Rural University of Pernambuco, Brazil Pedro Henrique Ferreira da Silva --- Federal Rural University of Pernambuco, Brazil Alexandre Carneiro Leão de Mello --- Federal Rural University of Pernambuco, Brazil Evaristo Jorge Oliveira de Souza --- Federal Rural University of Pernambuco, Brazil Márcio Vieira da Cunha --- Federal Rural University of Pernambuco, BrazilAdding tropical legumes into grass-based forage systems may increase the nutritive fodder value, but competition may decrease legume quality. We evaluated the nutritional values and agronomic responses of tall and dwarf elephant grass genotypes (Cenchrus purpureus (Schumach.) Morrone.) and butterfly...