A5051807279- Soil Carbon and Nitrogen Dynamics
- Plant responses to elevated CO2
- Soil and Water Nutrient Dynamics
- Atmospheric chemistry and aerosols
- NMR spectroscopy and applications
- Plant nutrient uptake and metabolism
- Plant Stress Responses and Tolerance
- Hydrocarbon exploration and reservoir analysis
- Legume Nitrogen Fixing Symbiosis
- Agriculture, Soil, Plant Science
- Peatlands and Wetlands Ecology
- Advanced NMR Techniques and Applications
- Phosphorus and nutrient management
- Clay minerals and soil interactions
- Animal Behavior and Welfare Studies
- Isotope Analysis in Ecology
- Adsorption and biosorption for pollutant removal
- Toxic Organic Pollutants Impact
- Animal Nutrition and Physiology
- Atmospheric Ozone and Climate
- Photosynthetic Processes and Mechanisms
- Plant Water Relations and Carbon Dynamics
- Biocrusts and Microbial Ecology
- Arsenic contamination and mitigation
- Marine and coastal ecosystems
Old Dominion University
2015-2021
Chinese Academy of Sciences
2007-2021
Institute of Soil Science
2014-2021
Tianjin Medical University
2019
University of Chinese Academy of Sciences
2014-2018
Yantai Institute of Coastal Zone Research
2013
Institute of Subtropical Agriculture
2007
Dissolved black carbon (BC) released from biochar can be one of the more photoactive components in dissolved organic matter (DOM) pool. BC was mainly composed aliphatics and aromatics substituted by aromatic C-O carboxyl/ester/quinone moieties as determined solid-state nuclear magnetic resonance. It underwent 56% loss absorbance at 254 nm, almost complete fluorescence, 30% mineralization during a 169 h simulated sunlight exposure. Photoreactions preferentially targeted methyl moieties,...
Abstract Labile organic carbon (LOC) fractions and related enzyme activities in soils are considered to be early sensitive indicators of soil quality changes. We investigated the influences fertilization residue incorporation on LOC fractions, activities, pool management index (CPMI) a 10-year field experiment. The experiment was composed three treatments: (1) no (control), (2) chemical fertilizer application alone (F), (3) combined with wheat straw residues (F + R). Generally, F R treatment...
The effects of the chemical structure, surface properties, and micropore modified black carbon samples (BCs) on sorption mechanism hydrophobic organic contaminants (HOCs) are discussed. Activated oxidized BCs were produced from a shale kerogen at 250-500 °C by activation regents (KOH ZnCl2) then oxidative (H2O2 NaClO). properties (water contact angel, Boehm titration, cation exchange capacity, CEC), structural (advanced solid-state 13C NMR), (CO2 adsorption), mesopore (N2 desorption...
Elevated carbon dioxide (CO2 ) and nitrogen (N) availability can interactively promote cucumber yield, but how the yield increase is realized remains unclear, whilst interactive effects on fruit quality are unknown. In this study, plants (Cucumis sativus L. cv. Jinmei No. 3) were grown in a paddy soil under three CO2 concentrations - 400 (ambient ), 800 (elevated , eCO2 1200 µmol mol-1 (super-elevated two N applications 0.06 (low N) 0.24 g kg-1 (high N).Compared with ambient increased by...
Humic substances (HS) are vital to soil fertility and carbon sequestration. Using multiple cross-polarization/magic-angle spinning (multiCP/MAS) NMR combined with dipolar dephasing, we quantitatively characterized humic fractions, i.e., fulvic acid (FA), (HA), humin (HM), isolated from two representative soils (upland paddy soils) in China under six long-term (>20 years) fertilizer treatments. Results indicate that each fraction showed chemical distinction between the upland soils,...
Pyrogenic carbonaceous matter (PCM) is redox-active and promotes both abiotic biotic reactions in the environment, possibly as a result of its conductivity phenolic/quinone functional groups. However, due to complexity PCM, contribution or groups redox activity poorly understood, which hinders potential engineering applications. Here, we synthesized tunable conjugated microporous polymers (CMPs) that possess key properties can be used PCM analogues provide insights reactivity. Specifically,...
The concentration changes of mineral elements in plants at different CO2 concentrations ([CO2]) and nitrogen (N) supplies the mechanisms which control such are not clear. Hydroponic trials on cucumber with three [CO2] (400, 625, 1200 μmol mol−1) five N supply levels (2, 4, 7, 14, 21 mmol L−1) were conducted. When high supply, increase total biomass by elevated was 51.7% 70.1% seedling initial fruiting stages, respectively. An net photosynthetic rate (Pn) more than 60%, a decrease stomatal...
Summary Long‐term application of fertilizers has a considerable effect on the accumulation soil organic carbon ( SOC ), but underlying processes remain unclear. We have examined effects in two long‐term (> 20 years) field experiments double‐cropped maize Z ea mays L .)–wheat T riticum aestivum .) rotation C alcaric F luvisol and paddy rice O ryza sativa ) H ydragric A nthrosol. The chemical structures were characterized with multiple cross‐polarization magic‐angle spinning 13 nuclear...
To elucidate how different extreme heteroatom concentrations in oil shale kerogen may present and contribute to various structural features, three samples, containing with high oxygen content, low sulfur were analyzed using advanced 13C solid-state nuclear magnetic resonance (NMR) techniques, including multiple cross-polarization/magic angle spinning (multiCP/MAS), dipolar dephasing (multiCP/DD), 2D 1H–13C heteronuclear correlation (2D HETCOR). We found that Estonian kukersite was mostly...
Fused-ring aromatics, important skeletal components of black carbon (BC), contribute to long-term (C) sequestration in nature. They have previously been thought be primarily formed by incomplete combustion organic materials, whereas the nonpyrogenic origins are negligible. Using advanced solid-state 13C nuclear magnetic resonance (NMR), including recoupled long-range C-H dipolar dephasing, exchange with protonated and nonprotonated spectral editing (EXPANSE), dipolar-dephased...
This study described a simple and quick method to detect trace quantities of non-reducing sugar (viz. sucrose) in the root exudates cucumber ( Cucumis sativus ) under CO 2 enrichment. Sucrose was determined by analyzing fructose glucose before after invertase digestion using high-performance liquid chromatography. Using this technique, optimal hydrolysis condition 5.00 μg·mL −1 for 10 minutes. The detection limit ultraviolet-visible detector post-column derivatization with tetrazolium 0.25,...