搜索结果: 1-15 共查到“土壤学 soil water”相关记录23条 . 查询时间(0.137 秒)
SPATIO-TEMPORAL VARIATIONS OF SOIL WATER USE IN THE GROWING SEASON IN NORTHEAST CHINA USING MODIS DATA
Soil Water Use Gross Primary Productivity Visible and Shortwave Infrared Drought Index (VSDI) MODIS Spatio-temporal Pattern Growing Season Northeast China
2018/5/11
Water use efficiency is known as an important indicator of carbon and water cycle and reflects the transformation capacity of vegetation water and nutrients into biomass. In this study, we presented a...
Evaluation of Different Soil Water Potential by Field Capacity Threshold in Combination with a Triggered Irrigation Module
field water capacity dual-porosity model HYDRUS-1D
2015/7/30
Irrigation efficiency improvement requires optimization of its parameters like irrigation scheduling, threshold and
amount of water usage. If these parameters are not satisfactorily optimized, negat...
Identifying the Origin of Soil Water Repellency at Regional Level Using Multiple Soil Characteristics: The White Carpathians and Myjavska Pahorkatina Upland Case Study
land-use molarity of an ethanol droplet (MED) soil organic carbon
2015/7/28
This paper evaluates the relationship between water repellency and multiple characteristics of topsoil samples
belonging to seven Reference Soil Groups, taken from the area of the White Carpathians ...
On parameterization of heat conduction in coupled soil water and heat flow modelling
advective heat flux dual-permeability model preferential flow soil heat transport soil thermal conductivity surface energy balance
2015/3/5
Soil water and heat transport plays an important role in various hydrologic, agricultural, and industrial applications. Accordingly, an increasing attention is paid to relevant simulation models. In t...
Comparison of two sensors ECH2O EC-5 and SM200 for measuring soil water content
bulk density CaCO3 ECH20 soil moisture sensor EC-5 fraction of sand particles SM200 sensor soil and soil water salinity soils of the Czech Republic soil water content
2015/3/3
The goal of this study was calibration of the ECH20 soil moisture sensor EC-5 and the sensor SM200 for selected soils of the Czech Republic. Based on the soil maps of the Czech Republic and various cl...
Influence of the degree of soil organic matter lability on the calcium carbonate equilibrium of soil water
calcium carbonate equilibrium degree of lability liming need soil organic matter soil water
2015/3/2
In average samples of three sandy-loamy acid Cambisols from a South Bohemian area labile organic matters were determined by the permangate method modified by the dichromate method, and the rate consta...
A Chernozem soil water regime response to predicted climate change scenarios
climate change SWAP simulation modelling soil moisture soil tillage Chernozem soil water conservation direct drilling
2015/2/3
Climate, hydrology and vegetation are closely linked at local, regional and global scales. The recent land use and plant production systems are adapted to the present climatic conditions. Thus, studie...
A brief overview of the causes, impacts and amelioration of soil water repellency – a review
soil water repellency hydrophobicity agriculture land management water shortages
2015/2/3
This article describes the phenomenon of soil water repellency, starting from the fundamental principals of water transport and storage in soil. Soil water repellency is a reduction in the rate of wet...
Using the sensitivity of biomass production to soil water for physiological drought evaluation
physiological drought soil water content transpiration biomass production mathematical modelling maize
2015/2/3
The analysis of drought as a phenomenon and the proposal of how to define and quantify the deficiency of water in soil for plants, so called physiological drought, are described. The presented approac...
Soil water regime estimated from the soil water storage monitored in time
ecology classification soil water regime soil water content monitoring soil water storage
2015/2/3
During the vegetation season, the water storage in the soil aeration zone is influenced by meteorological phenomena and by the vegetated cover. If the groundwater table is in contact with the soil pro...
Analysis of Soil Water Response to Grass Transpiration
evapotranspiration root water uptake water stress function Richards’ equation preferential flow dual-permeability model lysimeter
2015/1/28
This paper focuses on numerical modelling of soil water movement in response to the root water uptake that is driven by transpiration. The flow of water in a lysimeter, installed at a grass covered hi...
Cropping frequency and N fertilizer effects on soil water distribution from spring to fall in the semiarid Canadian prairies
Fallow Frequency Water Use Plant Biomass Spring Wheat Soil Water
2013/3/4
In the semiarid Canadian prairies, water is the most limiting and nitrogen (N) the second most limiting factor influencing spring wheat (Triticum aestivum L.) production. The efficiency of water-and n...
Variability of soil water-physical properties in a small catchment of the Loess Plateau, China
Geostatistical analysis regression analysis rainfall seasn land use pattern
2011/1/13
Data from the Donggou small catchment, located in a typical wind-water erosion crisscross zone on the Loess Plateau of China, illustrate the spatial variability of soil water-physical properties of di...
不同土层土壤水分特征曲线的空间变异及其影响因素（Spatial Variability of Soil Water Retention Curve in Different Soil Layers and Its Affecting Factors）
土壤水分特征曲线 空间变异 多重分形
2010/1/28
利用多重分形和联合多重分形方法，对陕西杨凌地区0～20cm和20～40cm土层van Genuchten模型参数的空间变异性及其影响因素进行了研究。结果表明：0～20cm和20～40cm土层参数α都具有明显的多重分形特征，空间变异性较强，且分别是由低值和高值分布引起的；参数n和θs的多重分形特征不明显，空间变异性较弱。0～20cm和20～40cm土层van Genuchten模型参数与土壤物理特性...