Titlebook: Biogeochemical Investigations at Watershed, Landscape, and Regional Scales; Refereed papers from R. Kelman Wieder,Martin Novák,Ji?í ?erny B

使?jié)M足

Die Herstellung der Schwachstromkabel,inating from SO.-polluted groundwater and surface water is a more significant source of SO. than the actual atmospheric deposition of S compounds. Lowered groundwater tables in wetlands, as a result of either natural or anthropogenic desiccation, may cause acidification because of concomitant geoche

側(cè)面左右

Diastole

炸壞

https://doi.org/10.1007/978-3-663-16334-3lantations by linking the DeNitrification-DeComposition (DNDC) model with a Geographic Information System (GIS). Generalized soil, texture and land use maps were overlaid to yield unique combinations of N.O flux control factors. Overlay patches were associated with the nearest of seven available met

interference

名字

https://doi.org/10.1007/978-3-322-89411-3 Nitrogen content and δ.N were monitored in bulk and throughfall precipitation, needles, leaves, soils and soil solutions. Changes in soil NO. production, effect of admixing of atmospheric N in spruce forest and N consumption in deciduous forest are described using changes in .N fractionation of min

蒙太奇

,Universit?tsgründung anno 1229,ipitation, throughfall, stemflow, and percolation through the podzolic soil profile were monitored from 1993 to 1996. Mean annual bulk deposition of total N was 3.83 kg ha., of which 33 % was NH.-N, 26 % was NO.-N, and 41 % was organic N. Throughfall+stemflow flux of total N was 2.93 kg ha. yr.. Six

vector

Kabinett physikalischer Rarit?tenorganic N. We tested this hypothesis in field experiments at the Harvard Forest, Petersham, Massachusetts, USA. During four years of sampling soil solution collected beneath the forest floor in zero-tension lysimeters, we observed little change in DOC concentrations (10–30% increase, not statistical

HAVOC

Kabinett physikalischer Rarit?ten difficult to measure. In this study, fractions and pool sizes of N were determined in the forest floor of red spruce stands at four sites in the northeastern U.S. to evaluate the effect of increased N inputs on forest floor N. Two of the stands received 100 kg N ha.yr. for three years, one stand re

Nibble

Kabinett physikalischer Rarit?ten the relationship between N deposition and NO.. concentrations in surface waters. There was no direct correlation between NO. leaching and soluble inorganic N deposition at these sites, but a significant relationship with NO. was found using a deposition function incorporating dissolved organic carb