Vol. 52
Title: Cotton Gin Compost as an Alternative Substrate for Propagation11©
Authors: David M. Cole, Jeff L. Sibley, Eugene K. Blythe, D. Joseph Eakes and Ken M. Tilt
pp: 388-392
Abstract:
Selection of substrates for use in propagation is often based on cost, availability,
ease of handling, and reproducibility. Peat (P) and pine bark (PB) are common
substrate components for propagators in the Southeastern United States. Availability
and cost of P and PB can be inconsistent or unpredictable with forecast
for restrictions on future supply of these materials. Cotton gin compost (CGC)
is readily available in the Southeastern U.S.A. and may hold potential as a substrate
substitute or extender suitable for propagation. In May of 2002, cuttings
of Solenostemon ‘Defiance’, Lagerstroemia ‘Natchez’, and Nandina domestica ‘Atropurpurea Nana’ were stuck in six substrate blends. Cuttings were evaluated for root initiation and development. In all three species, cuttings
rooted in CGC and perlite ( 1 : 1, v/v) were equal to or greater than those that were stuck
in an industry standard peat and perlite (1 : 1, v/v) substrate in all categories of
root evaluation. CGC could be used as a substrate and substitute for peat in the propagation of coleus, crapemyrtle, and dwarf nandina.
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