Nitrogen uptake and leaching loss of thirteen temperate grass species under high N loading

dc.contributor.authorMoir, James
dc.contributor.authorEdwards, GR
dc.contributor.authorBerry, LN
dc.description.abstractThe intensification of grazed pasture systems in New Zealand has resulted in increased nitrate (NO₃⁻) leaching and associated significant reductions in water quality, resulting from high N loading in the cow urine patch. A glasshouse soil column experiment was conducted at Lincoln University examining the N uptake capacities and leaching losses of sixteen commercial and ‘weed’ pasture grasses, comprising thirteen species. Three dairy cow urine N treatments (N loading rates) were applied in May 2010: 0 (N0), 300 (N300) and 700 (N700) kg N ha⁻¹. Grass was harvested at 21-d intervals, leachates collected to quantify N leaching losses and root mass measured. Shoot yield, root mass, N uptake and N leaching loss varied significantly between species (P < 0·001) and were strongly driven by N loading rate. The highest yielding species at N700 were Lolium multiflorum ‘Feast 2’ and ‘Tama’ (782 and 743 g DM m⁻²), while Festuca arundinacea ‘Flecha’ and Lolium perenne ‘Alto' were lowest yielding (375 and 419 g DM m⁻²). Plant N uptake and root mass followed a similar trend, and only moderate increases in total plant N uptake were observed for most species when urine N application rate was increased from N300 to N700. N leaching loss was highest at N700 for F. arundinacea ‘Flecha’ (378 kg N ha⁻¹) and lowest for L. multiflorum ‘Feast 2’ and ‘Tama’ (134 and 130 kg N ha⁻¹). Strong negative linear relationships were observed between N leaching loss, plant N uptake and root mass. The results indicate that species such as L. multiflorum may play a critical role in reducing pasture N leaching losses, while traditionally sown L. perenne, and also F. arundinacea, may be less suitable.
dc.identifier.citationMoir, J.L., Edwards, G.R., & Berry, L.N. (2013). Nitrogen uptake and leaching loss of thirteen temperate grass species under high N loading. Grass and Forage Science, 68(2), 313-325. doi:10.1111/j.1365-2494.2012.00905.x
dc.identifier.other132BF (isidoc)
dc.publisherJohn Wiley and Sons Ltd, Inc.
dc.relationThe original publication is available from John Wiley and Sons Ltd, Inc. - -
dc.relation.isPartOfGrass and Forage Science
dc.rights© 2012 Blackwell Publishing Ltd
dc.subjectdairy pasture
dc.subjectN leaching
dc.subjectN uptake
dc.subject.anzsrcANZSRC::079902 Fertilisers and Agrochemicals (incl. Application)
dc.subject.anzsrc2020ANZSRC::3002 Agriculture, land and farm management
dc.subject.anzsrc2020ANZSRC::3004 Crop and pasture production
dc.titleNitrogen uptake and leaching loss of thirteen temperate grass species under high N loading
dc.typeJournal Article
lu.contributor.unitLU|Agriculture and Life Sciences
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