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Investigations of the cause of first-year stunting of Douglas-fir seedlings in bareroot conifer nurseries

Investigations of the cause of first-year stunting of Douglas-fir seedlings in bareroot conifer nurseries

Tree planters' notes 52(1): 19-25

We investigated several possible causes of 1-0 stunt in Douglas-fir [Pseudotsuga menziesii (Mirb.) Franco] in two fumigated bareroot nurseries. The results suggest that (1) delayed development of a root system contributes to seedling nutrient stress; (2) lack of ectomycorrhizae did not cause stunt; (3) root diseases were not involved; and (4) some soil microorganisms on root surfaces may have produced toxins that prevented nutrient-absorbing hair root development. We conclude that some combination of factors limits root system development, leading to nutrient deficiency, bud set, and stunting.

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Accession: 016189521

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