Physical growing media characteristics of Sphagnum biomass dominated by Sphagnum fuscum (Schimp.) Klinggr

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Kämäräinen , A , Simojoki , A , Linden , L , Jokinen , K & Silvan , N 2018 , ' Physical growing media characteristics of Sphagnum biomass dominated by Sphagnum fuscum (Schimp.) Klinggr ' , Mires and Peat , vol. 21 , 17 . https://doi.org/10.19189/MaP.2017.OMB.278

Title: Physical growing media characteristics of Sphagnum biomass dominated by Sphagnum fuscum (Schimp.) Klinggr
Author: Kämäräinen, A.; Simojoki, A.; Linden, L.; Jokinen, K.; Silvan, N.
Contributor: University of Helsinki, Department of Agricultural Sciences
University of Helsinki, Department of Agricultural Sciences
University of Helsinki, Department of Agricultural Sciences
Date: 2018
Language: eng
Number of pages: 16
Belongs to series: Mires and Peat
ISSN: 1819-754X
URI: http://hdl.handle.net/10138/251519
Abstract: The surface biomass of moss dominated by Sphagnum fuscum (Schimp.) Klinggr. (Rusty Bog-moss) was harvested from a sparsely drained raised bog. Physical properties of the Sphagnum moss were determined and compared with those of weakly and moderately decomposed peats. Water retention curves (WRC) and saturated hydraulic conductivities (K-s) are reported for samples of Sphagnum moss with natural structure, as well as for samples that were cut to selected fibre lengths or compacted to different bulk densities. The gravimetric water retention results indicate that, on a dry mass basis, Sphagnum moss can hold more water than both types of peat under equal matric potentials. On a volumetric basis, the water retention of Sphagnum moss can be linearly increased by compacting at a gravimetric water content of 2 (g water / g dry mass). The bimodal water retention curve of Sphagnum moss appears to be a consequence of the natural double porosity of the moss matrix. The 6-parameter form of the double-porosity van Genuchten equation is used to describe the volumetric water retention of the moss as its bulk density increases. Our results provide considerable insight into the physical growing media properties of Sphagnum moss biomass.
Subject: bog biomass
Sphagnum fibre
peat substitute
renewable growing media
UNSATURATED HYDRAULIC CONDUCTIVITY
POROUS-MEDIA
PEAT DECOMPOSITION
GAS-DIFFUSION
WATER-CONTENT
CORNER FLOW
PORE-SIZE
MOSS
GROWTH
BOG
1183 Plant biology, microbiology, virology
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