Eero Paavilainen

Lannoitus ja ravinteiden kierto suometsissä

Paavilainen E. Lannoitus ja ravinteiden kierto suometsissä.

Tiivistelmä

The effect of the first fertilization (PK, NPK) on the plant biomass and nutrient cycle of a drained dwarf shrub pine swamps was only barely noticeable after thirteen growing seasons. NPK refertilization increased the annual biomass production and the amount of litter. The macronutrient content of the tree crop and the field layer vegetation increased, while the copper and boron content decreased after refertilizati-on. NPK fertilization also increased the amount of nutrients in the litter, and accelerated the decomposition of cellulose test slips and needle litter. The individual nutrient contents on a nitrogen-rich peat soil were clearly higher in, the birch litter than in the pine litter. Refertilization, especially with NPK and micro-nutrients, in most cases increased the nutrient contents and amount of litter.

Vastaanotettu 31.10.2017 Julkaistu 1.1.1984

Katselukerrat 1221

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