Articles
Herbaceous ornamental species for extensive green roofs
Article number
1374_6
Pages
45 – 52
Language
English
Abstract
Green roofs can help reduce flooding, improve air quality, increase the biodiversity, promote higher energy efficiency, allows to develop urban agriculture, and bring beauty by contributing to the aesthetics of large cities.
Good green roof planning is about the correct choice of species that must be adapted to each climate of the national territory and withstand the physiological stresses of cultivation.
In this way, choosing resistant species that provide full vegetation cover is fundamental in this crop.
Currently, in Brazil, and especially in the Southern region, there are no indications of ornamental herbaceous species for extensive green roofs.
The species chosen for this research were selected because of their ornamental potential and potential for cultivation in cold climate regions with frost tolerance.
The objective of this study was to select and establish resistant and indicated species for subtropical regions.
For this, Aptenia cordifolia, Echeveria elegans, Gazania rigens, Lysimachia congestiflora, Ophiopogon japonicus, Osteospermum ecklonis, Oxalis vulcanicola and Zephirantes candida were evaluated.
Cover rate, flowering, regrowth and establishment time were observed.
Images of the experimental units were captured over a period of 12 months every two weeks.
The local climatic conditions and frosts were evaluated.
The species that remained during the 12 months of research were Echeveria elegans and Ophiopogon japonicus with 100% of green cover, being indicated for cultivation in extensive green roofs in subtropical climate regions.
Good green roof planning is about the correct choice of species that must be adapted to each climate of the national territory and withstand the physiological stresses of cultivation.
In this way, choosing resistant species that provide full vegetation cover is fundamental in this crop.
Currently, in Brazil, and especially in the Southern region, there are no indications of ornamental herbaceous species for extensive green roofs.
The species chosen for this research were selected because of their ornamental potential and potential for cultivation in cold climate regions with frost tolerance.
The objective of this study was to select and establish resistant and indicated species for subtropical regions.
For this, Aptenia cordifolia, Echeveria elegans, Gazania rigens, Lysimachia congestiflora, Ophiopogon japonicus, Osteospermum ecklonis, Oxalis vulcanicola and Zephirantes candida were evaluated.
Cover rate, flowering, regrowth and establishment time were observed.
Images of the experimental units were captured over a period of 12 months every two weeks.
The local climatic conditions and frosts were evaluated.
The species that remained during the 12 months of research were Echeveria elegans and Ophiopogon japonicus with 100% of green cover, being indicated for cultivation in extensive green roofs in subtropical climate regions.
Authors
M.G. Noya, F.L. Cuquel
Keywords
bio terraces, heart leaf, echeveria, treasure flower, moneywort, Cape marguerite, mondo grass, volcanic sorrel, fairy lily
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