Artikkelit jotka sisältää sanan 'liming'
Fyto-2H-valmisteen vaikutus männyn neulasten ravinnepitoisuuksiin suometsissä.
English title: Effect of Fyto-2H-fertilizer on nutrient concentrations in pine needles Scots in peatland forests.
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A granular calcium and wood ash mixture (Fyto-2H-fertilizer) increased foliar, K and B and decreased Zn after two growing periods in Pinus silvestris stands. It had also a positive effect on needle mass (d. m.), but not as pronounced one as the PK-fertilizer for peatland forests. It was concluded that Fyto-2H-product can increase the nutrient contents, which have been observed to be essential for the state of health in peatland forests. Further it contains slowly soluble portions of Ca and Mg, which have been proved to be very often the growth limiting factors e.g. in disturbed forests in Central Europe.
Keywords: Fertilizer, liming, needle analysis, Pinus silvestris, wood ash
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Veijalainen,
Department of Forest Ecology, The Finnish Forest Research Institute P.O. Box 18, FIN-01301, Vantaa
Sähköposti:
ei.tietoa@nn.oo
Factors affecting fine root dynamics of trees.
Avainsanat:
fertilization;
Carbon budget;
fine root production;
liming;
minirhizotron;
mycorrhiza;
root tip;
soil temperature;
soil water
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Perhaps the most important function of the fine root system of forest trees is in the uptake of water and mineral nutrients. To perform this function adequately, the root system must be extensive and active enough to meet the needs of the canopy. Literature indicates that fine root production is substantial and that the seasonal pattern of fine root production is different from that of foliage production. Carbon incorporation into the soil in the form of dead roots is an important pathway in the total carbon flow through forest ecosystems. Root growth is sensitive to various climatic factors which are often imposed or strengthened by human activities. Factors that lead to growth suspension may or may not be the same as those that result in root shedding or senescence. The use of minirhizo-trons to study fine root dynamics means that ecologists are no longer justified in claiming that below-ground production is impossible to quantify in forest ecosystems.
Keywords: Carbon budget, fine root production, liming, fertilization, minirhizotron, mycorrhiza, root tip, soil temperature, soil water
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Persson,
Department of Ecology and Environmental Research, Swedish University of Agricultural Sciences, Box 7072, S-750 07 Uppsala, Sweden
Sähköposti:
ei.tietoa@nn.oo
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