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The effect of fertilization and irrigation on the vegetation dynamics of a pine-heath ecosystem

  • H. Persson
Part of the Advances in vegetation science book series (AIVS, volume 4)

Abstract

The year-to-year changes in the field-and bottom layers were studied by non-destructive recording of cover percentage on permanent plots in a young Scots pine (Pinus sylvestris) stand, subjected to experimental treatment. The treatments were: control (0), daily irrigation (I), fertilization once a year (F) and daily irrigation plus fertilization five days a week (IF). The cover of the total field layer of the 0-, I-, F- and IF-plots increased during the period of study from 51,40,47 and 50% in 1973 to 70,79,86 and 92% in 1980. The bulk of this increase consisted of Vaccinium vitis-idaea with the exception of the IF-plots, where the increase especially during the later part of the period of study was due to Chamaenerion angustifolium and and to some extent, to Rubus idaeus. The cover of the total bottom layer of the 0-, I-, F- and IF-plots changed from 63,59, 54 and 41% in 1973 to 68,90, 37 and 36% in 1980. The most drastic change took place in the IF-plots, where the composition changed from almost exclusively lichens to bryophytes. Pohlia nutans and Pleurozium schreberi were recorded in substantial amounts filling the gap left by the vanishing lichens. There were no conclusive changes on the I-plots as compared with the 0-plots. The cover estimates, however, were generally more substantial. The overall decline in the bottom layer on the F-plots was mainly due to a decrease in the cover of Pleurozium schreberi.

Keywords

Fine Root Bottom Layer Mineral Nutrient Permanent Plot Ecosystem Study 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Dr W. Junk Publishers, The Hague 1981

Authors and Affiliations

  • H. Persson
    • 1
  1. 1.Institute of Ecological BotanyUppsalaSweden

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