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Weström, Erika, 2010. Sticklingsetablering av Sedum spp. för gröna tak : biokol som organiskt material i substrat. First cycle, G2E. Alnarp: SLU, Landscape Management, Design, and Construction (until 121231)



The popularity of vegetated, or green roofs, has grown over the past years due to their potential
function of maintaining urban environment quality. The aim of this study was to investigate if
substrates with different organic material, peat and charcoal, with two contents (3 or 6 weight%)
influenced the growth of the cuttings during the first critical period of the establishment. Biochar is
used as amendment to agricultural soils and has, theoretically, many of the properties suitable as
organic content in green roof-substrates. Peat is one of the materials that is commercially used in
green roof industry. The substrate has been treated with different amounts of water. One serie of
treatments did not get any water after planting, the other serie got watered three times during the
experiment. As a reference the commercial used substrate, roof soil, where used. The purpose of
limiting watering was too emulate the establishment onsite the roofs, however, the study took place
in a greenhouse. The cuttings used in the study where two species of Sedum spp., S. album and S.
spurium these are usually used as groundcover on extensive green roofs.

The results did not show any clear differences due to the various substrates. The cuttings that were
treated with more water did show a significant growth compared to those who did not get watered.
Apart from the commercial roof soil there were no significant differences between the substrates,
even though peat caused a higher growth than biochar. However, the substrates with biochar were
the only ones in this study to pass FLL:s guidelines for least air content, they also had the highest
pore volume.

Main title:Sticklingsetablering av Sedum spp. för gröna tak
Subtitle:biokol som organiskt material i substrat
Authors:Weström, Erika
Supervisor:Emilsson, Tobias
Examiner:Lindqvist, Hans
Volume/Sequential designation:UNSPECIFIED
Year of Publication:2010
Level and depth descriptor:First cycle, G2E
Student's programme affiliation:LY003 Horticultural Science Programme 300 HEC
Supervising department:(LTJ, LTV) > Landscape Management, Design, and Construction (until 121231)
Keywords:gröna tak, substrat, biokol, Sedum album, Sedum spurium
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Subject. Use of subject categories until 2023-04-30.:Plant physiology - Nutrition
Plant physiology - Growth and development
Deposited On:22 Jul 2010 11:17
Metadata Last Modified:05 Oct 2012 19:34

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