Grazing and soil fertility effect on naturalized annual clover species in New Zealand high country

dc.contributor.authorMaxwell, Thomas
dc.contributor.authorMoir, James
dc.contributor.authorEdwards, GR
dc.description.abstractWith a view to increasing rangeland pasture legume abundance, the herbage biomass and seedling recruitment of four New Zealand naturalized annual clover species (haresfoot clover Trifolium arvense L., suckling clover T. dubium Sibth, cluster clover T. glomeratum L., and striated clover T. striatum L.) were measured in relation to spring grazing deferment versus continuous grazing and low versus high superphosphate fertilizer application (5 vs. 9 kg P · ha⁻¹) at a midaltitude (700-m) hill site. Naturalized species were dominant over periodically sown white (T. repens L.) and subterranean clover (T. subterraneum L.), contributing 90% to sward legume composition. Rainfall in spring–early summer varied greatly between years, driving the large variation in sward legume content (28% in the moist first year; 2% in the very dry second year). Grazing deferment in spring did not influence autumn seedling recruitment or the following spring herbage biomass of naturalized species. However, autumn recruitment of naturalized clovers was greater under low fertilizer (563 seedlings · m⁻²) compared with high fertilizer application (271 seedlings · m⁻²) in the second year of the study, suggesting a niche for these species under conditions of low soil P and S. Management efforts should focus on strategies to enhance naturalized species spread within NZ rangeland.
dc.description.sponsorshipResearch was funded by the Miss E. L. Hellaby Indigenous Grasslands Research Trust.
dc.identifier.otherED5DS (isidoc)
dc.publisherElsevier on behalf of the Society for Range Management
dc.relationThe original publication is available from Elsevier on behalf of the Society for Range Management - -
dc.relation.isPartOfRangeland Ecology and Management
dc.rights© 2016 The Society for Range Management. Published by Elsevier Inc. All rights reserved.
dc.subjectgrazing deferment
dc.subjectNew Zealand rangeland
dc.subjectpasture improvement
dc.subjectseedling recruitment
dc.subjectsummer dry hill country
dc.subject.anzsrcANZSRC::0701 Agriculture, Land and Farm Management
dc.subject.anzsrcANZSRC::0703 Crop and Pasture Production
dc.subject.anzsrcANZSRC::070302 Agronomy
dc.subject.anzsrc2020ANZSRC::30 Agricultural, veterinary and food sciences
dc.subject.anzsrc2020ANZSRC::31 Biological sciences
dc.subject.anzsrc2020ANZSRC::41 Environmental sciences
dc.titleGrazing and soil fertility effect on naturalized annual clover species in New Zealand high country
dc.typeJournal Article
lu.contributor.unitLU|Agriculture and Life Sciences
lu.contributor.unitLU|Agriculture and Life Sciences|AGSC
lu.contributor.unitLU|Agriculture and Life Sciences|SOILS
lu.contributor.unitLU|Research Management Office
lu.contributor.unitLU|Vice Chancellor's Office
lu.contributor.unitLU|Research Management Office|OLD QE18
lu.contributor.unitLU|Research Management Office|OLD PE20