Effect of fertilization and irrigation on the ground vegetation of a Scots pine stand

Effect of fertilization and irrigation on the ground vegetation of a Scots pine stand

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A mature Scots pine ( L.) stand growing on a site of the type in Southern Finland was fertilized with Sculpture (Set of 3) nitrogen-rich NPK fertilizer at a level of 150 kg pure nitrogen per hectare.The sample plots were also irrigated during four growing seasons.

The total amount of irrigation during this period was 1,200 mm.Fertilization alone increased the coverage of grasses and dwarf shrubs.The culmination of the increase occurred during the second growing season after the start of the treatment.

The rapid effect of irrigation on the coverage of ground vegetation was not so strong as that of fertilization.It was concluded on the basis of the developed growth model that the coverage of dwarf shrubs, especially , L-Tryptophan was, however, increased with the fertilization treatment for a prolonged period.Fertilization and irrigation had no visible effect on the coverage of lichens and mosses.

Pinus sylvestrisVacciniumCalluna vulgaris.