The effect of nitrogen on the yield of four pasture grass species
dc.contributor.author | Wilson, Nick | |
dc.date.accessioned | 2018-02-12T00:19:02Z | |
dc.date.available | 2018-02-12T00:19:02Z | |
dc.date.issued | 2017-11-14 | |
dc.description.abstract | This research examined the morpho-physiological attributes of four pasture grass species under two nitrogen (N) treatments. The experiment was a split plot design with main plots of N+ and N- and subplots of cocksfoot (Dactylisglomerata), pasture brome (Bromusvaldivianus), perennial ryegrass (Loliumperenne) and tall fescue (Festucaarundinacea). Leaf length, leaf area and specific leaf area (SLA) decreased by 30%, 36% and 7% under N-, whereas leaf dryness (percentage dry matter) increased by 18%. Total accumulated aboveground plant dry matter (DM) yield decreased by 13% in response to the N- treatment. Chlorophyll levels, measured as SPAD units, predicted yield under N+ conditions which was also reflected in the leaf length, leaf area and SLA measurements. The findings also suggest that species with higher green DM compensated for external N reduction by utilising higher internal available N within the plant. Brome and cocksfoot, and to a lesser degree tall fescue, showed superior morphological leaf attributes under mixed N-availability and can be proposed as suitable alternatives in dryland and low nitrogen farming systems as an alternative to perennial ryegrasses. | en |
dc.identifier.uri | https://hdl.handle.net/10182/9010 | |
dc.identifier.wikidata | Q112935282 | |
dc.language.iso | en | |
dc.publisher | Lincoln University | |
dc.subject | nitrogen | en |
dc.subject | perennial ryegrass | en |
dc.subject | brome | en |
dc.subject | cocksfoot | en |
dc.subject | Bromus valdivianus | en |
dc.subject | Dactylis glomerata | en |
dc.subject | Lolium perenne | en |
dc.subject | Festuca arundinacea | en |
dc.subject | dry matter | en |
dc.subject | leaf morphology | en |
dc.subject | SPAD meter | en |
dc.subject.anzsrc | ANZSRC::07 Agricultural and Veterinary Sciences | en |
dc.subject.anzsrc | ANZSRC::070303 Crop and Pasture Biochemistry and Physiology | en |
dc.title | The effect of nitrogen on the yield of four pasture grass species | en |
dc.type | Dissertation | en |
lu.contributor.unit | Department of Agricultural Sciences | |
lu.thesis.supervisor | Hofmann, Rainer | |
thesis.degree.name | Bachelor of Agricultural Science with Honours | en |
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