搜索结果: 61-75 共查到“地球科学总论 soil”相关记录85条 . 查询时间(0.159 秒)
Minor changes in soil organic carbon and charcoal concentrations detected in a temperate deciduous forest a year after an experimental slash-and-burn
Minor changes soil organic carbon charcoal concentrations temperate deciduous forest
2010/1/14
Anthropogenic fires affected the temperate deciduous forests of Central Europe over millennia. Biomass burning releases carbon to the atmosphere and produces charcoal, which potentially contributes to...
Long-term steady state 13C labelling to investigate soil carbon turnover in grasslands
Long-term steady state 13C soil carbon turnover grasslands
2010/1/14
We have set up a facility allowing steady state 13CO2 labeling of short stature vegetation (12 m2) for several years. 13C labelling is obtained by scrubbing the CO2 from outdoors air with a self-regen...
Analysis of the suitability of the German soil texture classification for the regional scale application of physical based hydrological model
the German soil texture classification the regional scale application hydrological model
2010/1/27
Regional scale hydrological simulations are mostly based on the use of standard data sets such as soil maps which are based on soil texture classification schemes. This paper analyses the suitability ...
Soils apart from equilibrium – consequences for soil carbon balance modelling
Soils equilibrium consequences soil carbon balance modelling
2010/1/14
Many projections of the soil carbon sink or source are based on kinetically defined carbon pool models. Para\-meters of these models are often determined in a way that the steady state of the model ma...
Factors controlling regional differences in forest soil emission of nitrogen oxides (NO and N2O)
Factors regional differences forest soil emission nitrogen oxides
2010/1/13
Soil emissions of NO and N2O were measured continuously at high frequency for more than one year at 15 European forest sites as part of the EU-funded project NOFRETETE. The locations represent differe...
Warming mineralises young and old soil carbon equally
Warming mineralises young and old soil carbon
2010/1/13
The temperature sensitivity of soil organic carbon decomposition is critical for predicting future climate change because soils store 2-3 times the amount of atmospheric carbon. Of particular controve...
Effects of free atmospheric CO2 enrichment (FACE),N fertilization and poplar genotype on the physical protection of carbon in the mineral soil of a polar plantation after five years
free atmospheric CO2 enrichment N fertilization poplar genotype physical protection
2010/1/13
Free air CO2 enrichment (FACE) experiments in aggrading forests and plantations have demonstrated significant increases in net primary production (NPP) and C storage in forest vegetation. The extra C ...
Modeling impacts of management alternatives on soil carbon storage of farmland in Northwest China
Modeling impacts management alternatives soil carbon storage farmland
2010/1/13
Long-term losses of soil organic carbon (SOC) have been observed in many agriculture lands in Northwest China, one of the regions with the longest cultivation history in the world. The decline of SOC ...
Controls over N2O,NOx and CO2 fluxes in a calcareous mountain forest soil
Controls N2O NOx CO2 fluxes calcareous mountain forest soil
2010/1/13
We measured nitrogen oxides (N2O and NOx), dinitrogen (N2) and carbon dioxide (CO2) emissions from a spruce-fir-beech forest soil in the North Tyrolean limestone Alps in Austria. The site received 10....
The relationship between NH3 emissions from a poultry farm and soil NO and N2O fluxes from a downwind forest
NH3 emissions poultry farm soil NO N2O fluxes downwind forest
2010/1/13
Intensive livestock farms emit large concentrations of NH3, most of which is deposited very close to the source. The presence of trees enhances the deposition. Rates to downwind forests can exceed 40 ...
Thermal stability responses of soil organic matter to long-term fertilization practices
Thermal stability responses soil organic matter long-term fertilization practices
2010/1/13
We used differential scanning calorimetry (DSC) to infer thermal properties of soil organic matter (SOM) in the static fertilization experiment in Bad Lauchstädt, Germany, which has been establis...
N2O,NO and CH4 exchange,and microbial N turnover over a Mediterranean pine forest soil
N2O NO CH4 microbial N Mediterranean pine forest soil
2010/1/13
Trace gas exchange of N2O, NO/NO2 and CH4 between soil and the atmosphere was measured in a typical Mediterranean pine (Pinus pinaster) forest during two intensive field campaigns in spring and autumn...
Is resistant soil organic matter more sensitive to temperature than the labile organic matter?
resistant soil organic temperature labile organic matter
2010/1/13
A recent paper by Knorr et al. (2005a) suggested that the decomposition of resistant soil organic matter is more temperature sensitive than labile organic matter. In Knorr et al.'s (2005a) model, the ...
Optimising soil-hydrological predictions using effective CART models
soil-hydrological predictions effective CART models
2010/1/25
There are various problems with process-based models at the landscape scale, including substantial computational requirements, a multitude of uncertain input parameters and the limited parameter ident...
Use of microwave remote sensing data to monitor spatio temporal characteristics of surface soil moisture at local and regional scales
microwave remote sensing data spatio temporal characteristics surface soil moisture
2010/1/25
Hydrologic processes, such as runoff production or evapotranspiration, largely depend on the variation of soil moisture and its spatial pattern. The interaction of electromagnetic waves with the land ...