搜索结果: 1-15 共查到“环境科学技术 Nitrogen”相关记录23条 . 查询时间(0.187 秒)
Reducing nutrient pollution, using a new understanding of how carbon is transformed in the environment to create fuel for nitrogen-consuming bacteria, is the focus of a National Science Foundation Fac...
Study Shows Wetlands Provide Landscape-Scale Reduction In Nitrogen Pollution（图）
Wetlands Landscape-Scale Reduction Nitrogen Pollution
2018/2/1
In agricultural regions such as the U.S. Midwest, excess nitrate from crop fertilizer makes its way into rivers and streams through subsurface drainage channels and agricultural ditches.High nitrate c...
Impact of the size of nitrogen fertiliser application rate on N2O flux
nitrous oxide soil emissions fertilising fertiliser spreader
2014/9/22
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 ...
Assessing nonpoint-source nitrogen loading and nitrogen fixation in lakes using δ15N and nutrient stoichiometry
Assessing nonpoint-source nitrogen loading nitrogen fixation lakes using δ15N nutrient stoichiometry
2014/4/3
Runoff from human-dominated watersheds has greatly altered nitrogen (N) and phosphorus (P) cycling in lakes. Nutrients from human sources are distinct from those from undisturbed ecosystems in several...
Nitrogen-tracking tools for better crops and less pollution（图）
pollution Nitrogen-tracking tools
2014/3/20
Carnegie's Cheng-Hsun Ho and Wolf Frommer developed tools that could help scientists observe the nitrogen-uptake process in real time and could lead to developments that improve agriculture and the en...
Study on Characteristics in the Removal Process of Ammonia Nitrogen and Nitrate Nitrogen by an Isolated Heterotrophic Nitrification-Aerobic Denitrification Strain Rhodococcus Sp.
Aerobic denitrification Heterotrophic nitrification Rhodococcus sp Nitrogen removal
2013/3/9
Removal of ammonia nitrogen and nitrate nitrogen by an heterotrophic nitrification-aerobic denitrification strain is an economical and effective method. In this article, a kind of heterotrophic nitrif...
Effect of Different Nitrogen Fertilizer Types and Application Measures on Temporal and Spatial Variation of Soil Nitrate-Nitrogen at Cucumber Field
Solar Greenhouse Cucumber Nitrate-Nitrogen Nitrogen Retention
2013/3/8
Nitrate-nitrogen content of groundwater are ever-increasing in underneath vegetable growing areas, in this paper, based on field test of cucumber cultivated in Solar Greenhouse in North China, we stud...
Residue Placement and Rate, Crop Species, and Nitrogen Fertilization Effects on Soil Greenhouse Gas Emissions
Greenhouse Gases Residue Management Nitrogen Fertilization Crop Species Spatial Variability
2013/3/11
High variability due to soil heterogeneity and climatic conditions challenge measurement of greenhouse gas (GHG) emissions as influenced by management practices in the field. To reduce this variabilit...
Evaluation of Nitrogen and Phosphorus Wastes Produced by Nile Tilapia (Oreochromis niloticus L.) Fed Azolla-Diets in Earthen Ponds
Azolla Aquaculture Environment Fish Meal Replacement Oreochromis niloticus Nitrogen Phosphorus Nutrient Balance
2013/3/11
Nitrogen (N) and phosphorus (P) wastes produced by Nile tilapia Oreochromis niloticus L. fed Azolla, an aquatic atmospheric nitrogen fixing fern, was evaluated for 90 days in pond experiment. Six ison...
Influence of organic-inorganic interactions on the preservation of sedimentary organic nitrogen: A preliminary experimental study
organic-inorganic interaction pyrrolic N compound alteration N-S atom exchange
2017/4/11
Experiments simulating reactions between pyrrole, hydrogen sulfide (H2S), and aluminum oxide (Al2O3) using a dynamic
thermochemical process simulator were conducted to investigate the effect of organ...
Passive Sampling of Ambient Nitrogen Dioxide Using Local Tubes
Nitrogen Dioxide Passive Sampler Diffusive Sampling
2013/3/11
Traditional active and automated sampling of nitrogen dioxide (NO2) monitoring techniques require expensive instrumentation which is not easily adapted for large scale monitoring by resource limited c...
Ionic Liquid Assisted Extraction of Nitrogen and Sulphur-Containing Air Pollutants from Model Oil and Regeneration of the Spent Ionic Liquid
Ionic Liquids Extraction Air Pollutants Nitrogen Compound Sulfur Compounds
2013/3/12
Removal of air pollutants, such as nitrogen and sulphur containing compounds from a model oil (dodecane) was studied. An ionic liquid (1-ethyl-3-methylimidazolium chloride [C2mim] [Cl]) was used as an...
Evaluation of Nitrogen Oxides Pollution in Takamatsu and Utazu Area in Kagawa Prefecture, Japan
Nitrogen Oxides NO2 NO Utazu Area Takamatsu Area
2013/3/12
We evaluate nitrogen oxides pollution in Takamatsu and Utazu area in Kagawa prefecture, Japan. Annually observations for nitrogen oxides (nitrogen dioxide; NO2, nitric oxide; NO) (1990-2007) were obta...
Removal of Nitrogen Dioxide and Sulfur Dioxide from Air Streams by Absorption in Urea Solution
Sulfur Dioxide Removal Nitrogen Dioxide Removal Column Absorption Removal of Acid Gases Air Pollution Prevention
2013/3/12
The study focuses on the absorption rates of NO2, SO2 and a mixture of these two acid gases into urea solution in packed bed column. The absorption rate was studied as a function of absorbent temperat...
In Situ Measurements of Hydrogen Peroxide, Nitric Acid and Reactive Nitrogen to Assess the Ozone Sensitivity in Pingtung County, Taiwan
Hydrogen peroxide Nitric acid Reactive nitrogen Ozone sensitivity Smog production model
2016/3/28
This study was aimed to investigate the concentration of hydrogen peroxide (H2O2), nitric acid (HNO3) and reactive
nitrogen (NOy) at three sites in Southern Taiwan during 2003–2004. The mean H2O2 con...