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Home → Publications → National Nursery Proceedings → 1986 → Relation Between Cold Hardiness, Root Growth Capacity, and Bud Dormancy in Three Western Conifers

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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Author(s): Richard W. Tinus, Karen E. Burr, Stephen J. Wallner, Rudy M. King

Publication: National Nursery Proceedings - 1986

Event: Combined Western Forest Nursery Council and Intermountain Nursery Association Meeting
1986 - Tumwater, WA