搜索结果: 31-45 共查到“地球科学总论 soil”相关记录85条 . 查询时间(0.141 秒)
Chronic nitrogen addition causes a reduction in soil carbon dioxide efflux during the high stem-growth period in a tropical montane forest but no response from a tropical lowland forest on a decadal time scale
Chronic nitrogen addition soil carbon dioxide efflux the high stem-growth period a tropical montane forest a tropical lowland forest
2010/1/21
Atmospheric nitrogen (N) deposition is rapidly increasing in tropical regions. We studied the response of soil carbon dioxide (CO2) efflux to long-term experimental N addition (125 kg N ha−1 yr&...
Risk-based stabilization planning for soil cut slopes
Risk-based stabilization planning soil cut slopes
2009/12/8
Risk-based slope stabilization planning integrates the failure probability and the failure consequence systematically and shows promise for use in the practice. This paper attempts to develop a risk-b...
Bayesian stochastic modeling of a spherical rock bouncing on a coarse soil
Bayesian stochastic modeling spherical rock coarse soil
2009/12/8
Trajectory analysis models are increasingly used for rockfall hazard mapping. However, classical approaches only partially account for the variability of the trajectories. In this paper, a general for...
Distribution of copper and zinc in the soil of an industrial zone in the city of Garešnica,Croatia
urban soil anthropogenic impact trace metal leaching enrichment factor ‘Bakrotisak’ factory
2009/12/7
Soils from an industrial zone in Garešnica, Croatia have been analysed by EDXRF and XRD. In the area surrounding two adjacent factories named 'Bakrotisak' and 'Croatia Protekt', thirty soil sites...
Assessment of soil n-alkane δD and branched tetraether membrane lipid distributions as tools for paleoelevation reconstruction
soil n-alkane δD paleoelevation reconstruction branched tetraether membrane lipid distributions
2010/1/21
δ18O values of pedogenic minerals forming from soil water are commonly used to reconstruct paleoelevation. To circumvent some of the disadvantages of this method, soil n-alkane δD values were recently...
A method to detect soil carbon degradation during soil erosion
soil carbon degradation soil erosion
2010/1/21
Soil erosion has been discussed intensively but controversial both as a significant source or a significant sink of atmospheric carbon possibly explaining the gap in the global carbon budget. One of t...
The consumption of atmospheric methane by soil in a simulated future climate
consumption atmospheric methane soil simulated future climate
2010/1/21
A recently developed model for the consumption of atmospheric methane by soil (Curry, 2007) is used to investigate the global magnitude and distribution of methane uptake in a simulated future climate...
Conservation of soil organic carbon,biodiversity and the provision of other ecosystem services along climatic gradients in West Africa
Conservation soil organic carbon biodiversity ecosystem services climatic gradients
2010/1/20
Terrestrial carbon resources are major drivers of development in West Africa. The distribution of these resources co-varies with ecosystem type and rainfall along a strong Northeast-Southwest climatic...
Effects of diurnal warming on soil respiration are not equal to the summed effects of day and night warming in a temperate steppe
diurnal warming soil respiration summed effects day and night warming temperate steppe
2010/1/20
The magnitude of daily minimum temperature increase is greater than that of daily maximum temperature increase under climate warming. This study was conducted to examine whether changes in soil respir...
Soil,plant,and transport influences on methane in a subalpine forest under high ultraviolet irradiance
Soil plant transport influences methane subalpine forest high ultraviolet irradiance
2010/1/20
Recent studies have demonstrated direct methane emission from plant foliage under aerobic conditions, particularly under high ultraviolet (UV) irradiance. We examined the potential importance of this ...
Mineral fertilization did not affect decay of old lignin and SOC in a 13C-labeled arable soil over 36 years
Mineral fertilization decay lignin SOC 13C-labeled arable soil
2010/1/20
Retardation of soil organic carbon (SOC) decay after nitrogen addition to litter or soil has been suggested in several recent studies and has been attributed to a retardation in lignin decay. With our...
Bayesian stochastic modeling of a spherical rock bouncing on a coarse soil
Bayesian stochastic modeling spherical rock bouncing coarse soil
2009/12/16
Trajectory analysis models are increasingly used for rockfall hazard mapping. However, classical approaches only partially account for the variability of the trajectories. In this paper, a general for...
Quantifying methane emissions from rice fields in the Taihu Lake region,China by coupling a detailed soil database with biogeochemical model
methane emissions rice fields Taihu Lake detailed soil database biogeochemical model
2010/1/20
As China has approximately 22% of the world's rice paddies, the regional quantification of CH4 emissions from these paddies is important in determining their contribution to the global greenhouse gas ...
Scientists to Map Out Earth's Soil--New tool will help explain and solve world’s greatest environmental threats（图）
Earth's Soil world’s greatest environmental threats
2009/12/10
New York, February 17, 2009 — Some of the answers to the world’s greatest challenges -- such as climate change, food security, and water scarcity -- lie right beneath our feet. Responding to these and...
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...