打印

作者

Timothy Johnson;Gregory Moore;Donald Cameron;Chris Brien

来源

URBAN FORESTRY & URBAN GREENING,Vol.43,Issue1,Article 126374

语言

英文

关键字

Permeable paving;Pavement damage;Gravel layer;Tree root deterrent;Footpath;Sidewalk;Pyrus calleryana

作者单位

Natural and Built Environments Research Centre, School of Natural and Built Environments, University of South Australia, Mawson Lakes Campus, Mawson Lakes Boulevard, Mawson Lakes, South Australia, 5095, Australia;School of Ecosystem and Forest Resources, University of Melbourne, Burnely Campus, 500 Yarra Boulevard, Richmond, Victoria, 3132, Australia;Phenomics and Bioinformatics Research Centre, School of Information Technology and Mathematical Sciences, University of South Australia, Mawson Lakes Campus, Mawson Lakes Boulevard, Mawson Lakes, South Australia, 5095, Australia;City of Mitcham, 131 Belair Road, Torrens Park, South Australia, 5062, Australia;Natural and Built Environments Research Centre, School of Natural and Built Environments, University of South Australia, Mawson Lakes Campus, Mawson Lakes Boulevard, Mawson Lakes, South Australia, 5095, Australia;School of Ecosystem and Forest Resources, University of Melbourne, Burnely Campus, 500 Yarra Boulevard, Richmond, Victoria, 3132, Australia;Phenomics and Bioinformatics Research Centre, School of Information Technology and Mathematical Sciences, University of South Australia, Mawson Lakes Campus, Mawson Lakes Boulevard, Mawson Lakes, South Australia, 5095, Australia;City of Mitcham, 131 Belair Road, Torrens Park, South Australia, 5062, Australia

摘要

Shallow tree roots can lead to footpath (sidewalk) damage. A layer of gravel has been shown to deter root growth in some situations, including beneath footpaths. Used to manage storm water in highly urbanised catchments, permeable paving incorporates a gravel layer in its base for structural and hydrological purposes. Conducted in Adelaide, South Australia, the experiment reported in this paper tested whether a gravel base layer beneath permeable paving deterred shallow growth of Pyrus calleryana ‘Chanticleer’ roots. After nearly five years of tree growth, results revealed that roots of larger diameter were fewer in number and they grew deeper in the subgrade beneath permeable paving than beneath impermeable paving. Fine root turnover in the permeable pavement base layer indicated that the gravel functioned as a buffer between the footpath surface and roots in the subgrade, potentially minimising pavement damage and maintenance requirements. No differences in tree height or trunk diameter were observed between trees grown in permeable paving and those grown in impermeable paving.