Artikkelit jotka sisältää sanan 'release cutting'
Verhopuuston tiheyden ja lannoituksen vaikutus kuusen taimien pituuskasvuun ojitetulla turvemaalla.
English title: The effect nurse crop density and fertilization on the height growth of Norway spruce seedlings on drained peatland.
Avainsanat:
peatland;
Foliar nutrients;
Betula pubescens;
growth responses;
Picea abies;
planting;
release cutting
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Tekijät
A natural understorey of Norway spruce often develops under birch on oligo-mesotrophic
peatlands, but spruce can also be planted on these sites. The effects of fertilization and
the density of the pubescent birch nurse crop on the height growth and needle nutrient
status of a planted spruce understorey on an old drained herb-rich sedge pine fen was
investigated in this study. The spruce transplants were planted early in the 1960’s. The
nurse crop was removed, thinned to 200 stems ha-1 or left unmanaged in 1988. A number
of plots were also fertilized. The height growth of the spruce transplants was measured
during two periods after management, and the needle nutrient concentrations were
determined before fertilization and again 10 years later. The height growth of the spruce
was 40 - 60% greater after removal of the nurse crop than that under the unthinned
nurse crop. Even the thinned nurse crop slowed down the growth of the understorey.
However, height growth was the best on the plots on which the nurse crop was removed
and the plots fertilized.
-
Hilli,
OSLA, Kirkkotie 1, FIN-91500 Muhos, Finland
Sähköposti:
ei.tietoa@nn.oo
- Päätalo, Sähköposti: ei.tietoa@nn.oo
- Moilanen, Sähköposti: ei.tietoa@nn.oo
- Piiroinen, Sähköposti: ei.tietoa@nn.oo
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