Zobrazeno 1 - 10
of 25
pro vyhledávání: '"Jürg B. Bucher"'
Publikováno v:
Global Change Biology. 11:1816-1827
The fate of immobilized N in soils is one of the great uncertainties in predicting C sequestration at increased CO2 and N deposition. In a dual isotope tracer experiment ( 13 C, 15 N) within a 4-year CO2 enrichment ( 1200ppmv) study with forest model
Publikováno v:
Forest Ecology and Management. 210:337-350
Carbon sequestered in biomass is not necessarily stored infinitely, but is exposed to human or natural disturbances. Storm is the most important natural disturbance agent in Swiss forests. Therefore, if forests are taken into account in the national
Publikováno v:
Oecologia. 132:109-117
The objectives of this study were to investigate how different soil types and elevated N deposition (0.7 vs 7 g N m–2a–1) influence the effects of elevated CO2 (370 vs 570 µmol CO2 mol–1) on soil nutrients and net accumulation of N, P, K, S, C
Autor:
Stefan Maurer, Rolf T. W. Siegwolf, Frank Hagedorn, Peter Blaser, Jürg B. Bucher, Philipp Egli
Publikováno v:
European Journal of Soil Science. 52:619-628
Soil contains the major part of carbon in terrestrial ecosystems, but the response of this carbon to enriching the atmosphere in CO 2 and to increased N deposition is not completely understood. We studied the effects of CO 2 concentrations at 370 and
Publikováno v:
Geoderma. 100:173-192
In this study, we investigated the dynamics of dissolved inorganic and organic nitrogen (N) in throughfall, in soil solutions of Gleysols, and in outflows from experimental sub-catchments as well as from a headwater catchment in Switzerland. Addition
Autor:
Rolf T. W. Siegwolf, Stephan Maurer, Rainer Matyssek, Paul Schmutz, Jürg B. Bucher, Matthias Saurer, Madeleine S. Günthardt-Goerg
Publikováno v:
New Phytologist. 149:233-246
• The effects of nitrogen dioxide (NO2) exposure are reported on the physiology, morphology and carbon partitioning of hybrid poplar clone cuttings (Populus ×euramericana) grown under high and low soil nitrogen supply. • Plants were exposed to f
Publikováno v:
Water, Air, and Soil Pollution. 129:119-142
The responses of nitrogen transformations and nitrate (NO_3 -) leaching to experimentally increased N deposition were studied in forested sub-catchments (1500 m2) with Gleysols in Central Switzerland. The aim was toinvestigate whether the increase in
Publikováno v:
Plant and Soil. 219:251-262
Twenty-four chemical elements were analysed by INAA, ICP-AES and CN in needles of Norway spruce (Picea abies (L.) Karst.). Branches were sampled from 54 trees on eight sites in Switzerland and South Germany. From each tree, twigs were sorted into the
Publikováno v:
Plant and Soil. 224:273-286
The objectives of this study were to estimate how soil type, elevated N deposition (0.7 vs. 7 g N m−2y−1) and tree species influence the potential effects of elevated CO2 (370 vs. 570 μmol CO2 mol−1) on N pools and fluxes in forest soils. Mode
Autor:
Jürg B. Bucher, Patrick Schleppi, Matthias Saurer, I.K. Bucher-Wallin, Nathalie Muller, Rolf T. W. Siegwolf
Publikováno v:
Water, Air, and Soil Pollution. 116:129-134
Nitrogen (N) was added over two years to a spruce-dominated (Picea abler) montane forest at Alptal, central Switzerland. A solution of ammonium nitrate (NH4NO2) was frequently sprinkled on the forest floor (1500 m2) to simulate an additional input of