RESEARCH NEWS

• Researchers Demenstrate How Importance of Microbial Charcateristics in Soil Organic Matter Formation

  The researchers estimated microbial carbon use efficiency (CUE) and nitrogen use efficiency (NUE) by 18O-labelled H2O incubation method and found that N addition (low, ambient and high N addition) and soil horizon (organic vs. mineral layer) affected microbial CUE and NUE, however no obvious change regulation was observed. In addition, researchers also found a polynomial correlation between microbial CUE and NUE, with the inflection point at CUE=0.4. Regression analysis showed that the variation in microbial community structure and the phosphorus stoichiometry imbalance were two main factors that affected microbial nutrient use efficiency.

  Apr 01, 2021
• Researchers Reveal the Effects of Nitrogen Addition on Soil Microbial Carbon and Nitrogen Use Efficiencies

  The researchers measured SOC, microbial physiological parameters (microbial biomass carbon (MBC), carbon use efficiency (CUE), turnover rate) and residue index (amino sugar (AS)) and found that SOC was positively correlated with MBC and AS, and negatively correlated with mean annual temperature and precipitation (MAT and MAP). In addition, the general linear model with physiological parameters and residue index was more effective in simulating SOC content.

  Apr 01, 2021
• How Sulphur Deposition Affects Soil Nematode Community Structure

  The researchers measured chemical and biological properties of the soil samples and found that S addition had a significant impact on richness and diversity of soil nematodes, but not on total abundance of soil nematodes and the relative abundance of Cervidellus and Aphelenchus (the dominant nematode species).

  Mar 30, 2021
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  Scientists Found Eco-strategies of Soil Microbes Control Temperature Sensitivity of Organic Matter Decomposition

  To test this hypothesis, Dr. Hui Li and her colleagues from the research group of Soil Chemistry in Institute of Applied Ecology, CAS analyzed Q10 of SOM decomposition in 13 sites of natural temperate mixed forests along a mean annual temperature (MAT) gradient of -1.9 to 5.1 °C.

  Mar 26, 2021
• Fatty Acid Methyl Ester-based Microemulsion Effectively Increases the Polycyclic Aromatic Hydrocarbon (PAH) Removals in Soils

  In a study published in Journal of Hazardous Materials, a research group led by GONG Zongqiang from the Shenyang Institute of Applied Ecology of the Chinese Academy of Sciences (CAS) proposed a fatty acid methyl ester-based microemulsion to remediate polycyclic aromatic hydrocarbon (PAH) contaminated soils.

  Mar 09, 2021
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  Scientists Have Series of Discoveries on Soil Microbial Carbon Pump and Carbon Storage Mechanism

  The mechanism of soil carbon turnover and sequestration is a hot and difficult point in carbon biogeochemical cycling research. The improvement of soil carbon sink function is closely related to key issues such as food security, water body quality, biodiversity maintenance, land health conservation (e.g., the black soil protection in particular), the international development strategy of Carbon Neutrality, and global climate crisis.

  Feb 09, 2021
• Researchers Reveal How Nitrogen and Water Addition Influence Inorganic Phosphorus Components in the Soil of Semi-arid Grasslands

  Phosphorus is a limiting nutrient affecting the primary productivity of terrestrial ecosystems. In semi-arid grasslands, soil phosphorus mainly exists in the form of mineral-bound inorganic phosphorus (up to 75% of total phosphorus in calcium-rich soil), which is an important soil phosphorus pool but is difficult to be directly used by plants.

  Jan 22, 2021
• How Do Aggregates of Different Sizes Mediate Soil-Plant Relationship?

  The researchers (Associate Prof. Wang Ruzhen, Prof. Jiang Yong and Ph.D. student WU Hui) found that there was a significant correlation between plant characteristics (biomass and species richness) and macro-aggregate properties (ratio of available nutrients to eubacteria) under the nitrogen addition and mowing treatment.

  Jan 22, 2021
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  Assessment of the Spatial Ecological Risk and Human Health Risk for Contaminated Soil in Oiled Fields

  Soil total petroleum hydrocarbon (TPH) and Polycyclic aromatic hydrocarbons (PAHs) pollution in oiled fields is a worldwide environmental problem. Accumulation of TPHs and PAHs in the soils was led by the crude oil exploitation. It caused the spatial ecological risk and human health risk.

  Jan 08, 2021
• Researchers Establish An Advanced Abio-combination Method for Rapid As Removal from As-Mn-rich AMD and Stable Final Solids

  In a new study published in Journal of Hazardous Materials on January 5, a research group led by Prof. JIA Yongfeng and WANG Shaofeng from Institute of Applied Ecology, Chinese Academy of Sciences has made great progress in an advanced abiotic oxidation-precipitation technology for fast efficient As removal from high-As(III)-Mn(II) AMD and low As-leaching solid waste.

  Jan 05, 2021