RESEARCH NEWS

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  Do we really know the impact of nitrogen deposition: frequency makes a difference?

  Previous field studies simulating atmospheric nitrogen (N) deposition generally apply N once or twice (large and infrequent N pulses) during the growing season. However, atmospheric N deposition occurs in more frequent events of smaller doses of N to ecosystems.

  Oct 10, 2018
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  Researchers Find the Influence Factors of Nitrogen Deposition in a Temperate Meadow Steppe

  Nitrogen (N) deposition is continuous increasing in terrestrial ecosystems, seriously impacts on ecosystem functioning, results in plant nutrient concentration and stoichiometric changes. Previous works have been well addressed the responses of nutrition traits at species-level to N deposition, while the community-level responses are still unknown for us.

  Sep 28, 2018
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  Contrasting Dynamics and Trait Controls in First-order Root Compared to Leaf Litter Decomposition

  Decomposition of plant roots and associated fungal mutualists is a dominant process in ecosystem carbon cycles, yet is woefully understudied compared to decomposition of leaf litter, particularly for the finest order roots that have the highest turnover. Much less is known about how roots decompose within the soil matrix, and whether the litter traits that influence leaf litter similarly influence root decomposition, or how well coordinated these influential traits are across leaves and roots.

  Sep 26, 2018
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  Effects of N Fertilization and Maize Straw Amendment on the Transformation and Fate of Fertilizer N in Black Soil of Northeast China

  Dr. LU Caiyan, a researcher of Institute of Applied Ecology, Chinese Academy of Sciences, evaluated the effects of N inputs rate and maize straw amendment on the transformation and fate of fertilizer N by 15N-labeled outdoor pot experiment.

  Sep 17, 2018
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  Oil Reservoir Indigenous Isolate Pseudomonas Stutzeri XP1 and Its Exopolysaccharide Product Well Enhanced Oil Recovery

  Although chemical-flooding technologies well improve oil recovery, the subsequent produced fluid treatment is difficult, and the used chemicals may pollute the environment. Microbial enhanced oil recovery (MEOR) technology utilizes microbial growth and metabolism in oil reservoirs or their metabolites to improve oil recovery. Because of its simple implementation, cost-effective and environment-friendly, MEOR is expected to become one promising technology to enhance oil recovery in the future.

  Sep 14, 2018
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  Direct Runoff Characteristics Respond to Urbanization in Urban Functional Zones

  Urbanization is a worldwide phenomenon, with population density continuing to grow and urban area to expand. Urban sprawl inevitably leads to non-urban land being converted to built-up areas, resulting in a significant increase in the proportion of impervious surfaces.

  Sep 11, 2018
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  Plant Community Nutrition Differently Respond to Experimental Drought along Aridity gradient in Grasslands of Northern China, Scientists Say

  As a consequence of global warming and associated climate change, the drought events and frequents was predicted to increase in the future. These changes will showed great impacts on grasslands structure and functions, as precipitation is the main driver for plant growth and development in this region. Therefore, understanding how plant species respond to drought has been a key issue for both plant physiologists and ecologists. As nitrogen (N) and phosphorus (P) are the two most important essential nutrients that limit plant growth, maintenance, and reproduction in terrestrial ecosystems, the responses of N and P to drought can be used to partly explain the population dynamics and ecosystem functioning under drought conditions.

  Sep 07, 2018
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  Researchers Reveal the Indirect Effects of Nitrogen Deposition on Community-level Litter Chemical Traits

  Litter chemical traits are one of the dominant controls on litter decomposition. Increasing atmospheric nitrogen (N) deposition is expected to alter litter chemical traits at the community level in both direct (altering intraspecific chemistry) and indirect ways (changing species abundance and composition). Compared to intraspecific changes, the role of changes in species composition in driving the responses of community litter chemicals to N enrichment has been seldom quantitatively addressed.

  Jul 27, 2018
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  Scientists Find Effect of Mixed Inorganic and Organic Nitrogen Addition on Soil Microbial Biomass and P Turnover

  Soil phosphorus (P) is an essential nutrient element that plant need for growth, which can be affected by the increasing atmospheric nitrogen (N) deposition and the changes in soil microbial biomass. Actually, the atmospheric N deposition consisted of inorganic N and organic N. However, little is known about the changes in soil microbial biomass under mixed inorganic N and organic N addition as well as their relationships with soil P turnover in temperate forest ecosystems.

  Jul 24, 2018
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  Researchers Reveal the Mechanisms Determining the Effectiveness of Soil Electrokinetic Remediation

  Electrokinetic (EK) remediation technology is a method of remediating heavy-metal contaminated soil by applying a low-density direct current across the soil. The EK process mainly involves two processes:

  Jul 12, 2018