Artikkelit jotka sisältää sanan 'ash fertilization'
Wood ash, PK-fertilizer and two soil ameliorating additives on drained pine mires.
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The study was made in four experimental fields on drained peatland in western Finland (63-66°N). One of the experiments was laid out in 1972; the others in 1978-1979. Treatments included different kinds of wood ash and PK-fertilizer, an ash-imitating mixture and apatite+biotite. Needle analyses and growth measurements were carried out in 1983— 1986. The concentrations of Mg and Mn generally decreased after fertilization. A rise in the foliar P, foliar K and foliar weight correlated with the growth response. Best growth increment was achieved with the ash-imitating mixture and PK-fertilizer, while apatite+biotite did not increase growth. In the first years after fertilization, growth on the ash plots was weaker, but later stronger or equal to growth on PK- and ash-imitating plots. The correlation between initial tree height and post-fertilization growth was similar on the different treatments. The poor growth increment on some ash treatments was probably due to the insufficient amount of nutrients in the ashes used.
Key words: Ash fertilization, Finland, growth, needle analysis, peat, Scots pine
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Silfverberg,
The Finnish Forest Research Institute, P.O. Box 18, SF-0I301 Vantaa, Finland
Sähköposti:
ei.tietoa@nn.oo
Tuhka- ja NPK-lannoituksen lyhyen aikavalin vaikutuksista änkyrimatoihin kahdella vanhalla ojitusalueella Itä-Suomessa.
English title: Short-term effects of ash and NPK fertilization on Enchytraeidae populations in two old, drained peatland areas in eastern Finland.
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The short-terms effects of wood ash and NPK fertilizer on the population of Enchytraeidae worms in a drained spruce swamp and pine bog were studied. Both NPK fertilizer (300 kg/ha) and ash (3000 kg/ha) treatments reduced worm numbers at both sites, but the effects were slight compared to seasonal fluctuations. Temporal fluctuations in worm numbers were relatively smaller at the pine bog than at the spruce swamp. NPK fertilizer temporarily changed the relative vertical distribution while tha ash treatment did not. The effects upon worm biomass and respiration rate were similar as those for worm numbers
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Key words: Enchytraeidae, NPK fertilization, ash fertilization, drained peatlands
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Hotanen,
The Finnish Forest Research Institute, Joensuu Research Station, Yliopistonkatu 7, SF-80100 Joensuu, Finland
Sähköposti:
ei.tietoa@nn.oo
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