搜索结果: 1-13 共查到“农学 flux”相关记录13条 . 查询时间(0.088 秒)
Characteristics of annual greenhouse gas flux and NO release from alpine meadow and forest on the eastern Tibetan Plateau
Alpine ecosystem Meadow Forest Non-CO2 greenhouse gas Nitric oxide
2024/2/27
The importance of the world's largest plateau (i.e., the Tibetan Plateau) as a source/sink for atmospheric greenhouse gases (GHGs) still remains uncertain as field observations covering entire years a...
INFLUENCE OF SKY CONDITIONS ON ESTIMATION OF PHOTOSYNTHETIC PHOTON FLUX DENSITY FOR AGRICULTURAL ECOSYSTEM
PPFD PAR Solar radiation PAR fraction Quantum-to-energy ratio Diffuse ratio Clearness index Sky conditions
2018/5/16
Photosynthetic photon flux density (PPFD: μmol m−2 s−1) is indispensable for plant physiology processes in photosynthesis. However, PPFD is seldom measured, so that PPFD ...
Sulphate concentration and S-SO42 – flux in soil solutions in the West Carpathians Mountains on an example of submontane beech forest stand
sulphate concentrations soil water submontane beech forest West Carpathians Mts
2015/4/14
The paper presents the evaluation of data on precipitation totals and on SO42 –concentrations and S-SO42 – fluxes in lysimetric waters in a submontane beech stand. The records cover continually a 1...
Impact of the size of nitrogen fertiliser application rate on N2O flux
nitrous oxide soil emissions fertilising fertiliser spreader
2014/3/28
The application rate of a nitrogen fertiliser is one of the most important factors that affect the nitrous oxide (N2O) flux. Calk ammonium nitrate with 27% nitrogen content was spread by a fertiliser ...
Effects of Water Deficit on Photosynthesis in Wheat Plants:VI. Capacitance and resistance of transpiratory water flux in different plant parts
Electric analogue Leaf water potential Photosynthesis Soil water deficit Stomata Triticum aestivum L
2009/8/5
In order to explore the physiological basis for the difference among plant parts in photosynthetic depression by soil water dieficit, the tissue water status was examined by using an electric circuit ...
Effects of Light Intensity and Red/Far-red Photon Flux Ratio on Nitrate Concentration and Nitrate Reductase Activity in Komatsuna
Flux Ratio Nitrate Concentration Komatsuna
2009/7/10
The effects of light intensity and altered red (R)/far-red (FR) photon flux ratio on nitrate concentration and nitrate reductase (NR) activity in komatsuna (Brassica campestris L. cv. ‘Harumi komatsun...
Comparison of two- and three-electrode systems in measurements of potential oxygen flux density in soil*
soil aeration soil oxygen flux ODR OFD
2008/11/24
This paper presents a comparison of the results of potential flux of oxygen in soil, determined by the voltammetric method, OFD, with the use of a three-electrode set of electrodes in the system of po...
Chronovoltammetric determination of oxygen flux density in the soil
oxygen diffusion rate determination ODR of soil soil aeration oxygen flux density
2008/11/21
A chronovoltammetric method for the determination of oxygen flux density (OFD) in the soil is proposed. The method is based on the current-potential relationship recorded on a platinum indicator elect...
Determination of the background current in electrochemical measurements of oxygen flux density in organic soils
oxygen flux density in the soil measurements ODR OFD
2008/11/21
The aims of this paper were: to state if the soluble substances contained in organic or organic-mineral soils can reduce in the same range of potentials as oxygen, falsifying (revaluing) the results ...
Determination of the integration range in voltammetric measurements of oxygen flux in the soil with the use of two- and three-electrode systems
soil aeration soil oxygen flux density ODR
2008/11/21
This paper presents the methodological aspects of the measurement of oxygen flux in the soil by voltammetric method with the use of three- (with potentiostat) and two-electrode systems. The studies we...
Influence of plant cover on the share of the soil heat flux in the heat balance of the active surface
heat balance soil heat flux leaf area index
2008/11/14
Soil heat flux is one of the heat balance components of active surface. Average value of this flux for a long period is equal zero, but for a short period it can be very high. It can be positive, when...
Simultaneous measurement of oxygen flux and salinity of the water saturated mineral soils
soil salinity soil oxygen flux density ODR OFD
2008/11/12
This paper presents a possibility current-voltage curve interpretation, registered in the saturated soil, in categories of soil salinity evaluation. A quantity containing the information about the sal...
Temporal stability of estimated soil water flux patterns across agricultural fields
soil water flux temporal stability agricultural fields
2008/11/12
When a field or a small watershed is repeatedly surveyed for soil water content, sites often can be spotted where soil is consistently wetter or consistently dryer than average across the study area. ...