Relation Between Cold Hardiness, Root Growth Capacity, and Bud Dormancy in Three Western Conifers
Ponderosa pine, Douglas-fir, and Engelmann spruce seedlings were greenhouse container grown, then cold acclimated and deacclimated in growth chambers over 19 weeks. Stem cold hardiness, new root length at 14 days, and days to budbreak were measured weekly. During acclimation, root growth capacity had doubled when stem cold hardiness reached -22 °C. During deacclimation, root growth capacity was not lost when two-thirds of maximum cold hardiness was lost. At budbreak, both cold hardiness and root growth capacity were minimum.
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| Publication | Forest Nursery Proceedings |
|---|---|
| Event | Tumwater, WA - 1986 |
| Author | Richard W. Tinus, Karen E. Burr, Stephen J. Wallner, and Rudy M. King |
| Published | 1986/08/12 |
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