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Article

Performance of Three Different Native Plant Mixtures for Extensive Green Roofs in a Humid Subtropical Climate Context

1
Department of Agronomy, Food, Natural Resources, Animals and Environment (DAFNAE), University of Padova, Viale dell’Università, 16, 35020 Legnaro, Italy
2
Department of Land, Environment, Agriculture and Forestry, University of Padova, Agripolis, Viale dell’Università 16, 35020 Legnaro, Italy
*
Author to whom correspondence should be addressed.
Water 2020, 12(12), 3484; https://doi.org/10.3390/w12123484
Received: 28 September 2020 / Revised: 28 November 2020 / Accepted: 9 December 2020 / Published: 11 December 2020
Most of the services and benefits of green roofs are related to the substrate as well as the vegetation layer. Although plant selection should be made on the basis of green roof typology, morphology, and climate conditions, very often, Sedum species only are used worldwide. However, they do not always guarantee the best performances; hence, it is important to investigate different plant species and their performance in different climate contexts. Herein, an experiment was conducted using three plant mixes (i.e., a Sedum mix, a perennial herbaceous mix, and a suffruticose mix), grown in boxes containing two substrates (a volcanic substrate or a recycled crushed brick substrate) and two drainage/storage layers (a preformed layer or a mineral layer), in factorial combination. The Sedum mix showed a high canopy cover, comparable to or even higher than that of the other mixes, particularly when supplemental irrigation was stopped. However, the actual crop coefficient (Kcact) of the herbaceous and suffruticose mixes was often higher than that of the Sedum mix. The results also showed that both the substrate and the drainage/storage layer may improve Kcact values as a consequence of their capacity for stormwater retention. View Full-Text
Keywords: Sedum; herbaceous perennials; suffruticose; canopy cover; actual crop coefficient Sedum; herbaceous perennials; suffruticose; canopy cover; actual crop coefficient
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MDPI and ACS Style

Zanin, G.; Bortolini, L. Performance of Three Different Native Plant Mixtures for Extensive Green Roofs in a Humid Subtropical Climate Context. Water 2020, 12, 3484. https://doi.org/10.3390/w12123484

AMA Style

Zanin G, Bortolini L. Performance of Three Different Native Plant Mixtures for Extensive Green Roofs in a Humid Subtropical Climate Context. Water. 2020; 12(12):3484. https://doi.org/10.3390/w12123484

Chicago/Turabian Style

Zanin, Giampaolo, and Lucia Bortolini. 2020. "Performance of Three Different Native Plant Mixtures for Extensive Green Roofs in a Humid Subtropical Climate Context" Water 12, no. 12: 3484. https://doi.org/10.3390/w12123484

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