| Автор | Hardy, M.B. |
| Автор | Tainton, N.M. |
| Автор | Morris, C.D. |
| Дата выпуска | 1994 |
| dc.description | AbstractA point‐based technique was used to determine the effects of grazing, due to stocking rate and cattle‐to‐sheep ratio, on the defoliation pattern of three grass species. At each of 100 systematically located points per grazing treatment the nearest plant of each of three target species was recorded as being in one of five defoliation categories which ranged from ungrazed to severely, but uniformly, grazed. Each treatment was sampled at the end of each of three consecutive grazing seasons. The data for each species were subjected to log‐linear and canonical correspondence analyses. In these analyses the proportional composition of defoliation categories was the dependent variable and stocking rate, cattle‐to‐sheep ratio and year were the independent variables. The results indicated that (1) stocking rate had an overriding effect on defoliation pattern; (2) ratio had a lesser but significant influence on the defoliation pattern of all three species; (3) similar defoliation patterns may be achieved at different cattle:sheep ratios provided that the stocking rate is adjusted; (4) the grazing capacity concept must be reconsidered to account for the differing impacts of grazing by cattle and by sheep on individual grass plants; and (5) the sampling technique applied in the study provided meaningful information on the defoliation pattern of the target species. |
| Формат | application.pdf |
| Издатель | Taylor & Francis Group |
| Копирайт | Copyright Taylor and Francis Group, LLC |
| Тема | Alloteropsis semialata |
| Тема | cattle:sheep ratio |
| Тема | grazing capacity |
| Тема | Themeda triandra |
| Тема | Tristachya leucothrix |
| Название | Defoliation patterns of three grass species in sourveld grazed by cattle and sheep |
| Тип | research-article |
| DOI | 10.1080/10220119.1994.9638353 |
| Electronic ISSN | 1727-9380 |
| Print ISSN | 1022-0119 |
| Журнал | African Journal of Range & Forage Science |
| Том | 11 |
| Первая страница | 37 |
| Последняя страница | 42 |
| Аффилиация | Hardy, M.B.; Cedara Agricultural Development Institute |
| Аффилиация | Tainton, N.M.; Department of Grassland Science, University of Natal |
| Аффилиация | Morris, C.D.; Roodeplaat Grassland Institute |
| Выпуск | 2 |
| Библиографическая ссылка | Acocks, JPH. 1988. Veld types of South Africa, Memoirs of the Botanical Survey of South Africa 57 |
| Библиографическая ссылка | Barnes, DL and Dempsey, CP. 1992. Influence of period of deferment before stocking spring‐burnt sourveld on sheep performance and veld productivity. Journal of the Grassland Society of Southern Africa, 9: 149–157. |
| Библиографическая ссылка | Edwards, D. 1983. A broad‐scale structural classification of vegetation for practical purposes. Bothalia, 14: 705–712. |
| Библиографическая ссылка | Edwards, PJ. 1981. “Application of grassland management principles — Sour grassveld”. In Veld and pasture management in South Africa, Edited by: Tainton, NM. Pietermaritzburg: Shuter & Shooter. |
| Библиографическая ссылка | Finney, DJ. 1964. Statistical method in biological assay, London: Griffin. |
| Библиографическая ссылка | Hardy, MB. 1986. Grazing dynamics in Highland Sourveld, Pietermaritzburg: University of Natal. MSc (Agric) thesis, |
| Библиографическая ссылка | Hatch, GP and Tainton, NM. 1990. A preliminary investigation of area‐selective grazing in the Southern Tall Grassveld of Natal. Journal of the Grassland Society of Southern Africa, 7: 238–242. |
| Библиографическая ссылка | Malherbe, CE. 1971. Die resultale van sekere skaap tot beesverhou‐dingsproewe op suurveld uitgevoer. Proceedings of the Grassland of Society of southern Africa, 6: 69–77. |
| Библиографическая ссылка | Meissner, HH, Hofmeyer, HS, Van Rensburg, WJJ and Pienaar, JP. 1983. Classification of livestock for realistic prediction of substitution values in terms of a biologically defined Large Stock Unit, Technical Communication 175 Pretoria: Department of Agriculture. |
| Библиографическая ссылка | Olson, BE and Richards, JH. 1988. Tussock regrowth after grazing: intercalary meristem and axillary bud activity of tillers of Agropyron desertorutn. Oikos, 51: 374–382. |
| Библиографическая ссылка | O'Reagain, PJ and Turner, JR. 1992. An evaluation of the empirical base for grazing management recommendations for rangeland in southern Africa. Journal of the Grassland Society of Southern Africa, 9: 38–49. |
| Библиографическая ссылка | Tabachnick, BG and Fidell, LS. 1989. Using multivariate statistics, New York: Harper Collins. |
| Библиографическая ссылка | ter Braak, CFJ. 1986. Canonical correspondence analysis: a new eigenvector technique for multivariate direct gradient analysis. Ecology, 67: 1167–1179. |
