Abstract
Nitrate-nitrogen fertilization triggered germination of dormantRubus idaeus L. (red raspberry) seeds naturally buried in the forest floor of 50-year-old coniferous stands of eastern Quebec. Orthogonal contrasts revealed a significant linear effect between the rates of nitrate applied and red raspberry seedling counts over two consecutive growing seasons. The fertilization treatments stimulated emergence to a greater extent in year 2 than in year 1. The potential effect of nitrate on raspberry seed dormancy breakage is briefly discussed in relation to site disturbance.
Résumé
Une fertilisation azotée sous forme de nitrate déclenche la germination de graines deRubus idaeus L. (framboisier sauvage) naturellement enfouies dans le parterre de peuplements forestiers conifériens âgés de 50 ans, situés dans l'est du Québec. Les contrastes orthogonaux ont montré un effet linéaire significatif entre les doses de nitrate appliquées et le dénombrement de semis de framboisier sauvage durant deux saisons de croissance consécutives. Les traitements de fertilisation ont davantage stimulé l'émergence du framboisier sauvage à la seconde année qu'à la première. L'auteur discute brièvement de l'effet possible du nitrate sur la levée de la dormance de graines de framboisier sauvage en relation avec les perturbations forestières.
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The author is also an invited professor at the Centre de recherche en biologie forestière, Université Laval, Québec.
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Jobidon, R. Nitrate fertilization stimulates emergence of red raspberry (Rubus idaeus L.) under forest canopy. Fertilizer Research 36, 91–94 (1993). https://doi.org/10.1007/BF00749952
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DOI: https://doi.org/10.1007/BF00749952