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Effects of two contrasting canopy manipulations on growth and water use of London plane (Platanus x acerifolia) trees.
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- Author(s): Hipps, Neil; Davies, Michael; Dunn, Joel; Griffiths, Howard; Atkinson, Christopher
- Source:
Plant & Soil; Sep2014, Vol. 382 Issue 1/2, p61-74, 14p- Subject Terms:
- Source:
- Additional Information
- Abstract: Aims: Two contrasting canopy manipulations were compared to unpruned controls on London plane trees, to determine the effects on canopy regrowth, soil and leaf water relations. Methods: 'Canopy reduction', was achieved by removing the outer 30 % length of all major branches and 'canopy thinning', by removing 30 % of lateral branches arising from major branches. Results: Total canopy leaf areas recovered within two and three years of pruning for the canopy-thinned and reduced trees respectively. Canopy reduction increased mean leaf size, nitrogen concentration, canopy leaf area density and conserved soil moisture for up to 3 years, whereas canopy thinning had no effects. Another experiment compared more severe canopy reduction to unpruned trees. This produced a similar growth response to the previous experiment, but soil moisture was conserved nearer to the trunk. Analysis of C and O signals along with leaf water relations and soil moisture data suggested that lower boundary layer conductance within the canopy-reduced trees restricted tree water use, whereas for the canopy-thinned trees the opposite occurred. Conclusions: Only canopy reduction conserved soil moisture and this was due to a combination of reduced total canopy leaf area and structural changes in canopy architecture. [ABSTRACT FROM AUTHOR]
- Abstract: Copyright of Plant & Soil is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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