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Proceedings of Past Forest Nursery Association Meetings:

The Effects of Mineral Nutrition on Hardening-Off of Conifer Seedlings
Edwards, Ivor K.
1989: Bismark, ND
Containerized lodgepole pine, jack pine, red pine, Scots pine, white
spruce, and black spruce were hardened off under different nutrient regimes to
determine the effect of nutrition on development of cold hardiness. There was only
weak correlation between cold hardiness and nutrient concentration or uptake in the
shoot of seedlings. In lodgepole pine, cold hardiness was associated with a low
nitrogen regime and in all other species, it was associated with either high
phosphorus or high potassium. The implication of a lower level of cold hardiness
achieved in pines is discussed.
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