The growth response of Pasture Brome (Bromus valdivianus Phil.) to defoliation frequency under two soil water restriction levels

Simple item page
dc.citation.issue2
dc.citation.volume11
dc.contributor.authorCranston L
dc.date.available2021-02
dc.date.issued15/02/2021
dc.description.abstractPasture brome (Bromus valdivianus Phil.) has the potential to increase current levels of herbage production and pasture persistence in New Zealand dryland, well-drained soils. However, there is little literature on the effect of defoliation management on growth of this grass under contrasting soil-water restriction levels. The growth physiology and performance of pasture brome were evaluated in pots in a glasshouse. Defoliation frequency (DF) treatments were applied based on three different accumulated growing degree-days (AGDD): 250, 500 and 1000 AGDD (high, medium, and low DF). At end of the first growing cycle (1000 AGDD), water availability was restricted to 20–25% of field capacity (FC) in half of the pots, while the other pots were maintained between 80–85% FC. Total accumulated herbage mass was positively related with the low DF and well-watered conditions (p < 0.05). At the final harvest, plants subjected to low DF had greater root mass than high and medium DF (p < 0.05). At each harvest, the leaf regrowth stage (LS) for low DF was 3.5, while for high and medium DF, the LS was 1.5 and 2.0; respectively. Tiller water-soluble carbohydrates were highest at the low DF and under 20–25% FC. Regardless of soil-water conditions, defoliation at 3.5 LS supports production, enhancing survival during a drought.
dc.description.publication-statusPublished
dc.identifierhttp://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000621976000001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=c5bb3b2499afac691c2e3c1a83ef6fef
dc.identifierARTN 300
dc.identifier.citationAGRONOMY-BASEL, 2021, 11 (2)
dc.identifier.doi10.3390/agronomy11020300
dc.identifier.eissn2073-4395
dc.identifier.elements-id440488
dc.identifier.harvestedMassey_Dark
dc.identifier.urihttps://hdl.handle.net/10179/16111
dc.publisherMDPI AG
dc.relation.isPartOfAGRONOMY-BASEL
dc.subjectdrought
dc.subjectleaf regrowth stage
dc.subjecttiller survival
dc.subjectperennial grass
dc.subjectmanagement
dc.subjectroot growth
dc.subject.anzsrc0502 Environmental Science and Management
dc.subject.anzsrc0703 Crop and Pasture Production
dc.titleThe growth response of Pasture Brome (Bromus valdivianus Phil.) to defoliation frequency under two soil water restriction levels
dc.typeJournal article
pubs.notesNot known
pubs.organisational-group/Massey University
pubs.organisational-group/Massey University/College of Sciences
pubs.organisational-group/Massey University/College of Sciences/PVC's Office - College of Sciences
pubs.organisational-group/Massey University/College of Sciences/School of Agriculture & Environment
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
agronomy-11-00300-v2 (1).pdf
Size:
748.81 KB
Format:
Adobe Portable Document Format
Description:
Download
Collections
Journal Articles