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Abstract
The effects of a commercial N-P-K fertilizer were studied on some native Svalbard plants on experimental sites located at Ny-Ålesund, Spitsbergen (79°N). In experiment I, fertilizers were applied each year for a period of 5 yr. Experiment II was started in 1985 and the results from the 1986 investigation are given. The experiments show a variety of responses to N-P-K fertilizers. Fertilizers seem to have an immediate positive effect on flower production and vegetative growth. Preliminary results indicate accelerated seed germination and may also indicate a real increase in germination frequency. On denuded areas, a moss mat is established relatively rapidly when fertilizers are applied. The response to fertilizers seems to be species specific. Of the species tested it was only Luzula confusa that showed no or only a slightly positive effect following the application of fertilizers.