e-journal

Plant establishment on unirrigated green roof modules in a subtropical climate

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Abstract.
Background and aims:
The application of green roof technology has becomemore common in the central, northwestern
and eastern USA, and is now being employed across the southern USA as well. However, there is
little research in the literature that evaluated plant survival on unirrigated green roofs in subtropical
climates that experience frequent drought and heat stress. Here,we summarize the results of
a study of plant establishment on a modular green roof in south-central Texas.

Methodology:
Fifteen plant species were field tested in 11.4-cm-deep green roof modules on a four-storey building
in College Station, Texas, with irrigation limited to the first several weeks of establishment.
Climate data, plant growth and species survival were measured over three growing seasons.

Principal results:
Four species survived growing seasons without any losses: Graptopetalum paraguayense,
Malephora lutea, Manfreda maculosa and Phemeranthus calycinus. Six species experienced
varying levels of mortality: Bulbine frutescens, Delosperma cooperi, Lampranthus spectabilis,
Sedum kamtschaticum, Sedum mexicanum and Nassella tenuissima. Five species had no
survivors: Dichondra argentea, Stemodia lanata, Myoporum parvifolium, Sedum moranense
and Sedum tetractinum.

Conclusions:
The establishment and survival of several plant species without any mortality suggests that
irrigation limited to the first few weeks after planting may be an effective approach on
green roofs in spite of the more challenging climatic conditions in the southern USA. Since
the climate in south-central Texas had been consistently drier and warmer than normal
during the study period, longer-term research on these species is recommended to expand
knowledge of establishment requirements for these species under a wider range of
conditions, including wetter than normal years.

Keywords: Conservation; drought tolerant; establishment; extensive green roof; irrigation.

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Ketersediaan

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Informasi Detail

Judul Seri

AoB PLANTS

No. Panggil

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Penerbit

Oxford : Oxford University Press on behalf of the Annals of Botany Company., 2013

Deskripsi Fisik

AoB PLANTS 5: pls049; doi:10.1093/aobpla/pls049

Bahasa

English

ISBN/ISSN

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Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

5: pls049

Subjek

EKOLOGI TANAMAN

Info Detail Spesifik

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Pernyataan Tanggungjawab

agus

Versi lain/terkait

Lampiran Berkas

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