NDLI: Nitrogen mineralisation in podzol soils under boreal Scots pine and Norway spruce stands

Content Provider	Springer Nature Link
Author	Pajuste, Katrin Frey, Jane
Copyright Year	2003
Abstract	N mineralisation was investigated in the mor humus layer of a podzol at a forested catchment area of Saarejärve Lake in Eastern Estonia. The investigated areas were pine (Rhodococcumunderstorey) and spruce (Vaccinium understorey) stands, which are permanent sample plots of an integrated monitoring network. The seasonal pattern of net N mineralisation was studied by incubating undisturbed cores of mor humus (0–8 cm) in buried polyethylene bags in situ. Samples were collected and incubated between July 1996 and April 1998. The period of incubation was approximately 1 month, except for wintertime when incubation lasted till thawing of ground (∼5 months). The amounts of mineral nitrogen formed during monthly incubations in vegetation period vary considerably (0.4–8.7 kg ha$^{−1}$). About 70% of the variation of net ammonification could be explained by environmental factors - temperature, initial moisture and pH. Ammonium was the dominant form of mineral nitrogen, which is typical for mor humus. The rate of nitrification was very low, and most of the annual net nitrification occurred during just one or two months (May–June, October) depending on site and year. Measured annual net N mineralisation was 29.2 kg ha$^{−1}$ for the spruce stand and 23.6 kg ha$^{−1}$ for the pine stand. These measures were found to be in good accordance with other N-fluxes in the ecosystem.
Starting Page	237
Ending Page	247
Page Count	11
File Format	PDF
ISSN	0032079X
Journal	Plant and Soil
Volume Number	257
Issue Number	1
e-ISSN	15735036
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	2003-01-01
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Ecology Plant Sciences Plant Physiology Soil Science & Conservation
Content Type	Text
Resource Type	Article
Subject	Soil Science Plant Science

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