Tropical Grasslands (1988) Volume 22, 511
THE EFFECT OF STOCKING RATE ON THE POPULATION DYNAMICS OF SIRATRO IN SIRATRO (MACROPTILIUM ATROPURPUREUM)/ SETARIA (SETARIA SPHACELATA) PASTURES IN SOUTH EAST QUEENSLAND.
CSIRO Division of Tropical Crops and Pastures, 306 Carmody Road, St. Lucia, Qld, 4067, Australia.
Two experiments in coastal south-east Queensland examined the effect of spelling on Siratro (Macroptilium atropurpureum) in Siratro/setaria (Setaria sphacelata) pastures where yield and density of Siratro were declining. Both experiments involved the use of small exclosures in established, continuously-grazed and set-stocked pastures. In an overgrazed pasture where Siratro and setaria were still the dominant species, both the legume and grass regained full productivity with 1 year's spelling. As overgrazing continued and the pasture degraded further, a longer rest period was required to restore productivity. In the final set of exclosures, the pasture did not fully recover even after 4 years of spelling.