Molecular structure of dissolved organic carbon in a sandy soil ...
2023年12月1日 · The molecular structure of DOC was mainly characterized by three functional groups: DOC-carboxyls (C=O of aldehydes, ketones, and carboxyls, 1800–1600 cm −1), DOC-aromatics (aromatic C=C, 1585–1480 cm −1), and DOC-polysaccharides (C–O of polysaccharides, ethers, and alcoholic groups, 1400–1000 cm −1) (Fig. S1 and Fig. S2).
Advances in Understanding the Molecular Structure of Soil Organic ...
2010年1月1日 · How should the chemical and physical nature of SOM be conceptualized in and affect future areas of research, such as soil carbon sequestration, calculation of soil carbon residence times and carbon cycle models?
Response of the chemical structure of soil organic carbon to …
2021年3月22日 · In this study, a 13 C nuclear magnetic resonance technique was used to analyze the chemical structure characteristics of soil organic carbon (SOC) under various rates of straw returning...
Some concepts of soil organic carbon characteristics and mineral ...
2016年3月1日 · In the past decades, the molecular structure of soil organic carbon (SOC) has been regarded as a pivotal criterion for predicting organic carbon (OC) turnover in soils.
Soil Organic Carbon Chemical Functional Groups under Different …
2019年3月8日 · We detected seven corresponding macro-molecular compounds of different organic carbon functional group, and 244 genes related to metabolism across all samples, and soil total C, total N, and DOC could be the main factors for microbial functional gene composition.
Molecular trade-offs in soil organic carbon composition at
2020年9月14日 · Here we present carbon functional groups and molecules from a diverse spectrum of North American surface mineral soils, collected primarily from the National Ecological Observatory Network and...
In an attempt to elucidate the fi importance of oxidative recalcitrance, fuel type and soil morphology to the persistence of soil organic matter, we examined two strongly contrasting soils using a variety of PyC isolation techniques coupled with quanti cations of the molecular fi structure and mean residence time of the isolated organic materials.
Micro-scale mapping of soil organic carbon using soft X-ray ...
5 天之前 · Soil organic carbon is crucial for soil fertility, productivity, and global carbon cycling. Despite significant progress in understanding carbon persistence and turnover, the underlying mechanisms require further study. A key challenge is visualizing and characterizing the spatial distribution of carbon within intact soil. This study introduces a novel approach to map carbon content at 35 µm ...
A landscape-scale view of soil organic matter dynamics
12 小时之前 · Soil carbon cycling is closely linked with landscape complexities in soil properties, climate and land use. This Perspective outlines how soil formation theory could provide insight on landscape ...
The Chemical Ecology of Soil Organic Matter Molecular …
2012年5月2日 · Soil organic matter (OM) contains two-thirds of the terrestrial carbon storage in the world and more than twice as much carbon as the atmosphere (Schlesinger, 1991; Batjes, 1996).