搜索结果: 1-7 共查到“理学 managed grassland”相关记录7条 . 查询时间(0.078 秒)
Ammonia sources and sinks in an intensively managed grassland canopy
Ammonia sources sinks grassland canopy
2010/1/21
Grasslands represent canopies with a complex structure where sources and sinks of ammonia (NH3) may coexist at the plant level. Moreover, management practices such as mowing, hay production and grazin...
Aerosol fluxes and particle growth above managed grassland
Aerosol fluxes particle growth managed grassland
2010/1/20
Particle deposition velocities (11–3000 nm diameter) measured above grassland by eddy covariance during the EU GRAMINAE experiment in June 2000 averaged 0.24 and 0.03 mm s−1 to long (0.75 m) and...
Ammonia fluxes in relation to cutting and fertilization of an intensively managed grassland derived from an inter-comparison of gradient measurements
Ammonia fluxes cutting fertilization grassland inter-comparison gradient measurements
2010/1/20
Quantification of ammonia (NH3) land-atmosphere exchange is required for atmospheric modelling and assessment of nitrogen deposition, yet flux measurement methods remain highly uncertain. To address t...
Intercomparison of ammonia measurement techniques at an intensively managed grassland site（Oensingen, Switzerland）
ammonia measurement techniques managed grassland site Switzerland
2009/5/6
As part of a field campaign in the framework of the NitroEurope project, three different instruments for atmospheric ammonia (NH3) measurements were operated side-by-side on a managed grassland site i...
Temporal variability in bioassays of the stomatal ammonia compensation point in relation to plant and soil nitrogen parameters in intensively managed grassland
Temporal variability stomatal ammonia compensation point plant and soil nitrogen parameters
2010/1/19
The exchange of ammonia between crop canopies and the atmosphere depends on a range of plant parameters and climatic conditions. However, little is known about effects of management factors. We have h...
Modelling the dynamic chemical interactions of atmospheric ammonia with leaf surface wetness in a managed grassland canopy
dynamic chemical interactions atmospheric ammonia leaf surface wetness grassland canopy
2010/1/19
Ammonia exchange fluxes between grassland and the atmosphere were modelled on the basis of stomatal compensation points and leaf surface chemistry, and compared with measured fluxes during the GRAMINA...
Contribution of different grass species to plant-atmosphere ammonia exchange in intensively managed grassland
Contribution grass species plant-atmosphere ammonia exchange grassland
2010/1/19
Species diversity in grasslands usually declines with increasing input of nitrogen from fertilizers or atmospheric deposition. Conversely, species diversity may also impact the build-up of soil and pl...