December 2020 - 26
RESEARCH
problems and opportunities
for substrate manufacturers
to formulate novel, highly
functioning substrates based
on the marriage of traditional
materials with wood products.
FOCUSING ON MUMS
AND POINSETTIAS
Of the many areas of needed
and on-going research in the
realm of substrate science, one
area of recent work conducted
by the Horticultural Substrates
Lab and North Carolina State
University has focused on
understanding and quantifying
the root growth of mum (Figure
2, page 24) and poinsettia
(Figure 3, page 25) cultivars and
the effect that wood substrates
have one them. To investigate
the effect wood components
have on rooting and root growth,
trials have been conducted in
the summer/fall of 2017, 2018,
and 2019 to evaluate peat moss
amended with numerous North
American and European commercial
wood products, including freshly
processed hammer-milled PTS,
extruded GreenFibre (Klasmann),
and disc-refined ForestGold
(Pindstrup) at various rates (between
10 and 50%). Each of these
specific wood materials represent
different processing technologies
which result in different particle
characteristics (as well as some
chemical differences) and substrate
formulation properties. Several other
commercial products of each of the
manufacturing methods were also
evaluated for comparison.
The Mini-Horhizotron was used
in some of these growth trials as a
tool to visually (qualitatively) and
quantitatively assess root initiation,
speed, branching/diameter, overall
development, and health over time.
Based on the design of this chamber,
root initiation from stuck cuttings all
The
future role of
wood products
as substrate
materials will
continue to
rely on their
consistency,
availability,
performance
and cost.
26 DECEMBER 2020 GPNMAG.COM
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December 2020
Table of Contents for the Digital Edition of December 2020
December 2020 - 1
December 2020 - 2
December 2020 - 3
December 2020 - 4
December 2020 - 5
December 2020 - 6
December 2020 - 7
December 2020 - 8
December 2020 - 9
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December 2020 - 26
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December 2020 - 31
December 2020 - 32
December 2020 - 33
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December 2020 - 35
December 2020 - 36
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