Ref ID: 10663
Ref Type: Journal (Unpublished)
Authors: Medhurst, J. L. and Beadle, C. L.
Pub Date: 2005
Journal Name: Tree Physiology
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Keywords: affected/change/concentration/crown/Deane/distribution/environment/Eucalyptus/Eucalyptus nitens/foliar nitrogen/illumination/leaf/Leaves/light/Maiden/nitrogen/nitrogen concentration/nitrogen distribution/nutrient/pattern/phosphorus/photosynthetic capacity/plantation/rate/response/spatial/specific leaf area/study/Tasmania,Australia/thinning/tree/zone
Abstract: The changes in photosynthetic rates, light environment and foliar nutrient levels following thinning were examined in an 8-year-old Eucalyptus nitens (Deane and Maiden) Maiden plantation. The objectives of the study were to (i) determine the extent to which maximum photosynthetic rates (Amax) of E. nitens are affected by thinning treatment, (ii) relate the spatial pattern of Amax within the crown to the changes in light environment caused by thinning, and (iii) establish if the responses of Amax to thinning are driven by changes in foliar nitrogen or phosphorus concentrations. Photosynthetic rates, measured at constant illumination, increased throughout the crown following thinning. The greatest increases were observed in the lower and middle crown zones. Photosynthetic rate was positively related to foliar nitrogen concentration. Thinning increased foliar nitrogen and phosphorus concentrations on a leaf area basis because of a significant decrease in specific leaf area after thinning (ie. thicker leaves). Changes in photosynthetic rates, specific leaf area and foliar nutrient distributions with thinning were well correlated with changes in the levels of incident light throughout the individual tree crown
Notes: Entered by Maria Ottenschlaeger (09/01/2004)
Reprint: Not in File
Program: SPF Sustainable Management
Project: B3
Deliverable: B3-4.1
Confidentiality: Confidential to All Partners until Published
Availability: Authors
Report: Annual Report 2005/6
Type: Article
Address: Jane.Medhurst@ffp.csiro.au
Misc 2: Submitted