搜索结果: 1-13 共查到“水文化学 nitrogen”相关记录13条 . 查询时间(0.225 秒)
Movement and leaching of residual nitrogen in soil has been studied in some
details in a lysimeter experiment. Profile measurements of soil water and of
nitrogen concentration in addition to measure...
Effects of Land Use on the Diffuse Load of Phosphorus and Nitrogen
Land Use Diffuse Load Phosphorus Nitrogen
2009/10/28
The diffuse load of phosphorus and nitrogen was studied in 23 small drainage
basins in different parts of Finland between 1965 and 1974. Total phosphorus
and total nitrogen concentrations were analy...
Nitrogen in Soil Water
Nitrogen Soil Water
2009/10/28
This review comprises a general description of nitrogen in soil water and the
use of nitrogen fertilizer. The following investigations on nitrogen leaching
and transformations are described: Investi...
Nitrogen Balance in Fertilizer Application and Plant Production
Nitrogen Balance Fertilizer Application Plant Production
2009/10/28
The investigation comprises several agricultural crops, a Karup locality (56O16'
N, 9"9' E) with an average annual precipitation of 775 mm and coarse sand
(soil I), and a T5strup locality (5Y40' N, ...
Profiles of Nitrogen Species in a Sand-Silt Aquifer at Haslemoen,Solør,South Norway
Nitrogen Species Sand-Silt Aquifer Haslemoen
2009/10/27
Chemical profiles of water in the vadose zone and in the upper part of the
groundwater from a water-table sand-silt aquifer at Haslemoen, South Norway,
have been studied. Filter tips attached to ste...
Nitrogen and Phosphorus Fluxes from Finnish Agricultural Areas to the Baltic Sea
Nitrogen and Phosphorus Fluxes Agricultural Areas Baltic Sea
2009/10/26
Nutrient losses from small drainage basins were compared to the nutrient
fluxes in small coastal rivers in order to study the representativeness of the
Finnish monitoring network of small basins, es...
NITROGEN CYCLING AND REMOVAL EFFICIENCY IN A RICE FIELD
nitrogen nitrogen cycle mass balance water quality
2009/10/13
The major sources and sinks of nitrogen (N) were calculated during the rice growth cycle in a lowland paddy field in Japan in order to better understand contamination of surface and groundwater. Depos...
Studies of lake environments using stable isotope ratios of nitrogen (δ15N) and carbon (δ13C)
stable isotopes nitrogen carbon lake
2009/7/14
Increasing numbers of studies have recently used stable isotopes of nitrogen (δ15N) and carbon (δ13C) to clarify the source of nutrients in lake water and sediments, the structure and energy flow of f...
Modelling the ecosystem effects of nitrogen deposition：Model of Ecosystem Retention and Loss of Inorganic Nitrogen
nitrogen deposition Ecosystem Retention
2009/6/8
A catchment-scale mass-balance model of linked carbon and nitrogen cycling in ecosystems has been developed for simulating leaching losses of inorganic nitrogen. The model (MERLIN) considers linked bi...
Modelling the response of soil and soil solution chemistry upon roofing a forest in an area with high nitrogen deposition
nitrate (NO3) sulphate (SO4) soil solution chemistry
2009/6/5
In the Speuld forest, the Netherlands, the dynamic soil acidification model NuCSAM has been applied to a manipulation experiment in which part of the forest was roofed to control nitrogen (N) and sulp...
Applying MERLIN for modelling nitrate leaching in a nitrogen saturated Douglas fir forest in the Netherlands after decreased atmospheric nitrogen input
refractory organic matter atmospheric nitrogen input nitrate leaching
2009/6/5
The MERLIN model was applied on the results of a field-scale manipulation experiment with decreased nitrogen (N) deposition in an N saturated forest ecosystem in the Netherlands. The aim was to invest...
Water and nitrogen processes along a typical water flowpath and streamwater exports from a forested catchment and changes after clear-cutting：a modelling study
nitrogen water flowpath
2009/5/18
A two dimensional model, FEMMA, to describe water and nitrogen (N) fluxes within and from a forested first-order catchment (Kangasvaara in Eastern Finland) was constructed by linking the most signifi...
Climate control on sulphate and nitrate concentrations in alpine streams of Northern Italy along a nitrogen saturation gradient
surface waters nitrate concentrations sulphate nitrogen saturation gradient
2009/4/29
The role of meteorology, hydrology and atmospheric deposition on the temporal pattern of SO4 and NO3 concentrations was investigated for three streams draining alpine catchments in Northern Italy.
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