Abstract
Adsorption to soil minerals and occlusion within soil aggregates are two critical mechanisms to shield soil organic carbon (SOC) from microbial decomposition. Here, we combined the synchrotron radiation based Fourier transform infrared (SR-FTIR) spectroscopy, synchrotron radiation based micro X-ray fluorescence microscopy (μ-XRF) and two-dimensional correlation spectroscopy (2DCOS) analysis to in situ visualize the interiors of intact microaggregates from a typical Ferralic Cambisol in China, which had endured 25-year organic fertilization. Results showed that the spatial distribution and correlation between clay clusters and biopolymers were heterogeneous and significant, and also demonstrated that clay clusters were associated as nuclei with the potential of binding carbon at the submicron scale. Furthermore, the combination of SR-FTIR mapping and 2DCOS analysis could explore the strategy of identifying overlapped spectra and quantifying the sequestration reactivity for the first time. Specifically, carbon retention correlated as the binding sequence orders: 3630 cm −1 > 3610 cm -1 , 985 cm -1 > 898 cm -1 , indicating that Fe/Al oxyhydroxides and phyllosilicates could regulate the organic matter sequestration without the influence of spatial perturbations. Together, we conclude a combined methodology to assess the heterogeneous binding microenvironments between the mineral assemblages and biopolymers, which could also contribute to understand the process of carbon sequestration interrestrial ecosystems.
| Original language | English |
|---|---|
| Pages (from-to) | 123-130 |
| Number of pages | 8 |
| Journal | Soil and Tillage Research |
| Volume | 189 |
| DOIs | |
| Publication status | Published - 1 Jun 2019 |
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A new strategy for assessing the binding microenvironments in intact soil microaggregates. / Xiao, Jian; Wen, Yong Li; Dou, Sen; Bostick, Benjamin C.; He, Xin Hua; Ran, Wei; Yu, Guang Hui; Shen, Qi Rong.
In: Soil and Tillage Research, Vol. 189, 01.06.2019, p. 123-130.Research output: Contribution to journal › Article
TY - JOUR
T1 - A new strategy for assessing the binding microenvironments in intact soil microaggregates
AU - Xiao, Jian
AU - Wen, Yong Li
AU - Dou, Sen
AU - Bostick, Benjamin C.
AU - He, Xin Hua
AU - Ran, Wei
AU - Yu, Guang Hui
AU - Shen, Qi Rong
PY - 2019/6/1
Y1 - 2019/6/1
N2 - Adsorption to soil minerals and occlusion within soil aggregates are two critical mechanisms to shield soil organic carbon (SOC) from microbial decomposition. Here, we combined the synchrotron radiation based Fourier transform infrared (SR-FTIR) spectroscopy, synchrotron radiation based micro X-ray fluorescence microscopy (μ-XRF) and two-dimensional correlation spectroscopy (2DCOS) analysis to in situ visualize the interiors of intact microaggregates from a typical Ferralic Cambisol in China, which had endured 25-year organic fertilization. Results showed that the spatial distribution and correlation between clay clusters and biopolymers were heterogeneous and significant, and also demonstrated that clay clusters were associated as nuclei with the potential of binding carbon at the submicron scale. Furthermore, the combination of SR-FTIR mapping and 2DCOS analysis could explore the strategy of identifying overlapped spectra and quantifying the sequestration reactivity for the first time. Specifically, carbon retention correlated as the binding sequence orders: 3630 cm −1 > 3610 cm -1 , 985 cm -1 > 898 cm -1 , indicating that Fe/Al oxyhydroxides and phyllosilicates could regulate the organic matter sequestration without the influence of spatial perturbations. Together, we conclude a combined methodology to assess the heterogeneous binding microenvironments between the mineral assemblages and biopolymers, which could also contribute to understand the process of carbon sequestration interrestrial ecosystems.
AB - Adsorption to soil minerals and occlusion within soil aggregates are two critical mechanisms to shield soil organic carbon (SOC) from microbial decomposition. Here, we combined the synchrotron radiation based Fourier transform infrared (SR-FTIR) spectroscopy, synchrotron radiation based micro X-ray fluorescence microscopy (μ-XRF) and two-dimensional correlation spectroscopy (2DCOS) analysis to in situ visualize the interiors of intact microaggregates from a typical Ferralic Cambisol in China, which had endured 25-year organic fertilization. Results showed that the spatial distribution and correlation between clay clusters and biopolymers were heterogeneous and significant, and also demonstrated that clay clusters were associated as nuclei with the potential of binding carbon at the submicron scale. Furthermore, the combination of SR-FTIR mapping and 2DCOS analysis could explore the strategy of identifying overlapped spectra and quantifying the sequestration reactivity for the first time. Specifically, carbon retention correlated as the binding sequence orders: 3630 cm −1 > 3610 cm -1 , 985 cm -1 > 898 cm -1 , indicating that Fe/Al oxyhydroxides and phyllosilicates could regulate the organic matter sequestration without the influence of spatial perturbations. Together, we conclude a combined methodology to assess the heterogeneous binding microenvironments between the mineral assemblages and biopolymers, which could also contribute to understand the process of carbon sequestration interrestrial ecosystems.
KW - Carbon sequestration
KW - Mineral clusters and biopolymers
KW - Soil microaggregates
KW - Synchrotron-radiation-based spectromicroscopy
KW - Two-dimensional correlation spectroscopy (2DCOS) analysis
UR - http://www.scopus.com/inward/record.url?scp=85060550715&partnerID=8YFLogxK
U2 - 10.1016/j.still.2019.01.008
DO - 10.1016/j.still.2019.01.008
M3 - Article
VL - 189
SP - 123
EP - 130
JO - Soil & Tillage Research
JF - Soil & Tillage Research
SN - 0167-1987
ER -