C
Christian Johannisson
Researcher at Swedish University of Agricultural Sciences
Publications - 9
Citations - 826
Christian Johannisson is an academic researcher from Swedish University of Agricultural Sciences. The author has contributed to research in topics: Nitrification & Ammonia volatilization from urea. The author has an hindex of 9, co-authored 9 publications receiving 785 citations.
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Journal ArticleDOI
15N abundance of surface soils, roots and mycorrhizas in profiles of European forest soils.
Peter Högberg,Lars Högbom,Helga Schinkel,Mona N. Högberg,Christian Johannisson,Håkan Wallmark +5 more
TL;DR: It is suggested that a flux of N through ECMs to aboveground parts in N-limited forests would leave 15N enriched compounds inFungal material, which could contribute to explain the observed δ15N profiles if fungal material is enriched, because it is a precursor of stable organic matter and recalcitrant N.
Journal ArticleDOI
15N Abundance of forests is correlated with losses of nitrogen
TL;DR: In this article, a direct correlation was found between fractional losses of added N and the change in δ15N during 19 years in an experiment with annual additions of N at three rates to a Scots pine forest in northern Sweden.
Journal ArticleDOI
Recovery of ectomycorrhiza after 'nitrogen saturation' of a conifer forest.
Peter Högberg,Christian Johannisson,Stephanie A. Yarwood,Ingeborg Callesen,Torgny Näsholm,David D. Myrold,Mona N. Högberg +6 more
TL;DR: The long-term impact of N loading and the recovery of ectomycorrhiza after high N loading on a Pinus sylvestris forest and the larger contributions compared with N-loaded plots of a fungal fatty acid biomarker and ectomy Corrhizal sequences suggest recovery of mesoporous fungi.
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15N abundance of soils and plants along an experimentally induced forest nitrogen supply gradient.
TL;DR: In this experiment, 15N abundance increased with dose of N applied in both grass and soil total-N, but more so in the grass, which was interpreted to be due to the grass sampling small but active pools of N subject to losses.
Journal ArticleDOI
Studies of 13C in the foliage reveal interactions between nutrients and water in forest fertilization experiments
TL;DR: In this article, the 13C abundance of current needles from top whorls in two long-term fertilization experiments, one in Norway spruce (Picea abies Karst.) and one in Scots pine (Pinus sylvestris L.).