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Hannu Mannerkoski (email)

Lannoituksen vaikutus kylvösten ensi kehitykseen turvealustalla.

Mannerkoski H. (1971). Lannoituksen vaikutus kylvösten ensi kehitykseen turvealustalla. Silva Fennica vol. 5 no. 2 article id 4841. https://doi.org/10.14214/sf.a14643

English title: Effect of fertilization on the initial development of Scots pine and Norway spruce plantations established by sowing on peat

Abstract

Experiments were carried out to find out the effect of fertilizer application on germination, seedling emmergnece and initial development in conifer plantations established on peat by sowing, with a special reference to Scots pine (Pinus sylvestris L.). The experiments were carried out in 1968–70 in laboratory, in greenhouse and in the field.

In the greenhouse experiments with Y fertilizer for peat soils (14% N, 18% P2O5, 10% K2O) it was shown that germination and seedling emergence decreased markedly with increased fertilizer application. Mortality among seedlings that had emerged was the higher the larger quantities of fertilizer had been applied. The effect of fertilization was the greater, the drier the substrate. Fine ground rock phosphate (33% P2O5) promoted seedling emergence on a dry substrate but not on a wet one.

The field experiments carried out in Central Finland included dry and wet sites. Y fertilizer, Oulu Saltpeter (25% N), fine-ground rock phosphate and potassium salt (50% K2O) were used. According to the results, easily soluble fertilizers decreased seedling emergence. On wet sites the effect of Y fertilizer was weaker than on drier sites. Fine-ground rock phosphate slightly increased the number of seedlings emerging. Height growth was increased during the first three growing seasons only by those fertilizers containing phosphorus.

The PDF includes a summary in English.

Original keywords
kuusi; mänty; turvemaat; lannoitus; itäminen; kuolleisuus; pituuskasvu

English keywords
Pinus sylvestris; Norway spruce; fertilization; Picea abies; germination; Scots pine; height growth; mortality; sowing

Published in 1971

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Available at https://doi.org/10.14214/sf.a14643 | Download PDF

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