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Rooting Volume Impacts Growth, Coverage and Thermal Tolerance of Green Façade Climbing Plants

Author

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  • Pei-Wen Chung

    (School of Ecosystem and Forestry Sciences, The University of Melbourne, 500 Yarra Boulevard, Richmond, VIC 3121, Australia)

  • Stephen J. Livesley

    (School of Ecosystem and Forestry Sciences, The University of Melbourne, 500 Yarra Boulevard, Richmond, VIC 3121, Australia)

  • John P. Rayner

    (School of Ecosystem and Forestry Sciences, The University of Melbourne, 500 Yarra Boulevard, Richmond, VIC 3121, Australia)

  • Claire Farrell

    (School of Ecosystem and Forestry Sciences, The University of Melbourne, 500 Yarra Boulevard, Richmond, VIC 3121, Australia)

Abstract

Green façades can provide cooling benefits through the shading of walls, evapotranspiration, and insulation. These benefits depend on good plant coverage and tolerance of heat stress. This requires sufficient rooting volume for plant growth and an adequate supply of moisture. On high-rise buildings, plants can be constrained by small rooting volumes due to engineering weight limits and cost. We assessed effects of rooting volume (21, 42, and 63 L) on the growth and coverage of Akebia quinata and Pandorea pandorana and leaf stress (chlorophyll fluorescence) in response to increasing air temperatures. We showed that 42 and 63 L rooting volumes significantly increased early plant growth and the percentage wall coverage for both species. Specific leaf area was significantly greater when grown in 63 L compared with 21 L. Shoot/root ratio did not change with rooting volumes. Regardless of rooting volume, higher air temperatures on west-facing aspects led to afternoon leaf stress. In practice, for each cubic meter of rooting volume, 21 m 2 ( P. pandorana ) and 10 m 2 ( A. quinata ) canopy coverage can be expected within six months.

Suggested Citation

  • Pei-Wen Chung & Stephen J. Livesley & John P. Rayner & Claire Farrell, 2021. "Rooting Volume Impacts Growth, Coverage and Thermal Tolerance of Green Façade Climbing Plants," Land, MDPI, vol. 10(12), pages 1-13, November.
    • Handle: RePEc:gam:jlands:v:10:y:2021:i:12:p:1281-:d:685810
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    References listed on IDEAS

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    1. Manso, Maria & Teotónio, Inês & Silva, Cristina Matos & Cruz, Carlos Oliveira, 2021. "Green roof and green wall benefits and costs: A review of the quantitative evidence," Renewable and Sustainable Energy Reviews, Elsevier, vol. 135(C).
    2. Pérez, Gabriel & Rincón, Lídia & Vila, Anna & González, Josep M. & Cabeza, Luisa F., 2011. "Green vertical systems for buildings as passive systems for energy savings," Applied Energy, Elsevier, vol. 88(12), pages 4854-4859.
    3. K. Oleson & A. Monaghan & O. Wilhelmi & M. Barlage & N. Brunsell & J. Feddema & L. Hu & D. Steinhoff, 2015. "Interactions between urbanization, heat stress, and climate change," Climatic Change, Springer, vol. 129(3), pages 525-541, April.
    4. Luis Pérez-Urrestarazu & Rafael Fernández-Cañero & Antonio Franco-Salas & Gregorio Egea, 2015. "Vertical Greening Systems and Sustainable Cities," Journal of Urban Technology, Taylor & Francis Journals, vol. 22(4), pages 65-85, October.
    5. Manso, Maria & Castro-Gomes, João, 2015. "Green wall systems: A review of their characteristics," Renewable and Sustainable Energy Reviews, Elsevier, vol. 41(C), pages 863-871.
    6. Fabrizio Ascione & Rosa Francesca De Masi & Margherita Mastellone & Silvia Ruggiero & Giuseppe Peter Vanoli, 2020. "Green Walls, a Critical Review: Knowledge Gaps, Design Parameters, Thermal Performances and Multi-Criteria Design Approaches," Energies, MDPI, vol. 13(9), pages 1-39, May.
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    1. Cansu Iraz Seyrek Şık & Agata Woźniczka & Barbara Widera, 2022. "A Conceptual Framework for the Design of Energy-Efficient Vertical Green Façades," Energies, MDPI, vol. 15(21), pages 1-19, October.

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