IntensIve sIlvIculture - Forest Science Labs - Research Network ...

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Growth of the stocktypes appeared to be related to differences in morphology and water-use
patterns as the seedlings competed for available water within each pot. The results show that
MPT seedlings, a new stocktype, performed as well as the more traditionally used 2+0 and 1+1
seedlings and that stocktype selection is important in reforestation efforts.
511. Rose, R. and D.L. Haase. 1995. Effect of the antidesiccant Moisturin on conifer seedling field
performance. Tree-Planters' Notes 46(3): 97-101.
Keywords: nursery operations
growth
tree/stand health
Abstract: Two concentrations of the antidesiccant Moisturin were applied to Douglas fir
(Pseudotsuga menziesii) and ponderosa pine (Pinus ponderosa) seedlings after lifting by either
dipping or spraying. Seedlings were outplanted to 5 typically dry sites in Oregon and to a garden
plot at Oregon State University. Seedling performance was assessed at the end of the first
growing season. Despite trends in plant moisture stress measurements that suggest reduced
transpirational loss, there were no significant treatment effects on height growth, survival, or stem
diameter growth at any of the study sites nor in the garden plot.
512. Rose, R. and D.L. Haase. 2000. The use of coir as a containerized growing medium for Douglasfir
seedlings. Native-Plants-Journal 1(2): 107-111.
Keywords: nursery operations
growth
carbon allocation
tree physiology
tree morphology
soil properties
Abstract: In response to environmental concerns and the need for peatland conservation,
alternative growing media for conifer seedling production must be investigated. Douglas-fir
(Pseudotsuga menziesii) seedlings were grown in 6 media; components included peat moss, peat
moss amended with sawdust, and 2 sources of coir (coconut fibre) mixed with and without peat
moss. Coir had higher pH, P, K, and Na and lower Ca and N than peat moss and a peat mosssawdust
mixture. Bulk densities of coir and coir-based media were lower than those in peat moss
and a peat moss-sawdust mixture. After 21 weeks, seedlings grown in coir-based media were
significantly smaller and had lower foliar N and Ca than those grown in peat moss. Because of
coir' many favourable qualities, further research is recommended using culturing regimes specific
to the substrate's nutrient properties.
513. Rose, R., D.L. Haase, F. Kroiher and T. Sabin. 1997. Root volume and growth of ponderosa pine
and Douglas-fir seedlings: a summary of eight growing seasons. Western-Journal-of-Applied-
Forestry 12(3): 69-73.
Keywords: nursery operations
growth
tree/stand health
Abstract: Survival, growth, and stem volume were determined for 2+0 bare-root ponderosa
pine (Pinus ponderosa) and Douglas fir (Pseudotsuga menziesii) seedlings, 8 growing seasons