<sup>13</sup>C-NMR spectroscopy studies of humic substances in subtropical perhumid montane forest soil

Chung, Tay-Lung; Chen, Jenn‐Shing; Chiu, Chih‐Yu; Tian, Guangming

doi:10.1007/s10310-011-0319-9

Cited by 18 publications

(14 citation statements)

References 44 publications

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“…Significant differences of SOC fractions were observed among different revegetation types, which was agreement with previous studies [15]. In our study, O-alkyl C dominated the SOC under different revegetation types, which was consistent with the findings from a natural Hinoki cypress forest in Taiwan [64], chestnut plantation soils in subtropical China [65], and the forest patterns change from conifer-broadleaf forests to plantation forests [66]. However, the results from Ussiri and Johnson showed that the alkyl C was the predominated SOC in Bh horizon of a hardwood forest soil [67].…”

Section: The Effect Of Different Revegetation Types On Soc Chemical Csupporting

confidence: 92%

Soil Organic Carbon Chemical Functional Groups under Different Revegetation Types Are Coupled with Changes in the Microbial Community Composition and the Functional Genes

Deng

Zhu

Zhou

et al. 2019

Forests

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Different revegetatiom types can affect the chemical composition of soil organic carbon (SOC), soil microbial community and the functional genes related to carbon cycle. However, the relationships between SOC chemical functional groups and soil microbial communities and the functional genes remains poorly unclear under different revegetation types. Using the solid-state 13C nuclear magnetic resonance (NMR) spectroscopy, we examined changes in the SOC chemical composition of five soils (0–10 cm depth) from Larix gmelinii Rupr. (LG), Pinus koraiensis Sieb. (PK), Quercus mongolica Fisch. (QM), Juglans mandshurica Maxim. (JM), and conifer-broadleaf forest (CB). And the soil microbial community genes related to metabolism of macro-molecular compounds were determined via whole genome shotgun based on Illumina HiSeq. Our results indicated that broadleaf forests (JM, QM) had increased the contents of soil total carbon (C), total nitrogen (N), dissolved organic carbon (DOC), and microbial biomass carbon (MBC), compared with coniferous forests (LG, PK) and the conifer-broadleaf forest (CB). While, the coniferous forests generated a lower O-alcoxyl C, a higher alkyl C, and the ratio of alkyl C/O-alkyl C than broadleaf forests. A total of four kingdoms were identified via whole metagenome shotgun sequencing, including eight archaea, 55 bacteria, 15 eukaryota, and two viruses, giving a total 80 phyla. The contents of alkyne C, phenolic C, methoxyl C, COO/NC=O, and alkyl C were strong related to the composition of soil microbial community and their contents illuminated a major part of the variation in soil microbial composition. 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. Interestingly, the relative abundances of different SOC chemical functional groups, the phylogenetic distance for microbes, the genes of C cycling based on the KEGG database, and the relative abundance of genes related to metabolism of macro-molecular compounds of different SOC chemical functional groups under different revegetation types all could be divided into three groups, including PK plus LG, JM plus QM, and CB. Our results also illustrated that variations in SOC chemical functional groups were strongly associated with changes of soil microbial community taxa and functional genes, which might be affected by the changes of soil characteristics.

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Section: The Effect Of Different Revegetation Types On Soc Chemical Csupporting

confidence: 92%

Soil Organic Carbon Chemical Functional Groups under Different Revegetation Types Are Coupled with Changes in the Microbial Community Composition and the Functional Genes

Deng

Zhu

Zhou

et al. 2019

Forests

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“…The influence of litter input on changes in remnant masses of each carbon during the early humification processes showed that mass loss rate of aromatic C in humified litter is higher in cypress than cedar (Ono et al 20092011). Our previous studies showed that humification degree of HAs, determined by E4/E6 ratio (Chen et al 2001a, b) and by 13 C NMR (Chung et al 2012) differed little by topographic position of the study site.…”

Section: Discussionmentioning

confidence: 92%

“…Podzolic soils are commonly found under Chamaecyparis forests in the cold and humid subalpine region in Taiwan (Chiu et al 1999 ; Jien et al 2010a , b 2013 ). The extremely high acidity and soil moisture in such undisturbed Chamaecyparis forest results in low diversity of soil bacterial communities (Lin et al 2010 2011 ) as well as low decomposition of organic matter and humification degree of humic acids (Chung et al 2012 ). Our previous studies revealed that the topography and intrinsic properties of different fractions of organic matter in a mountain lake environment affect the distribution and migration of organic substances (Chen and Chiu 2000 ).…”

Section: Introductionmentioning

confidence: 99%

“…Our previous studies revealed that the topography and intrinsic properties of different fractions of organic matter in a mountain lake environment affect the distribution and migration of organic substances (Chen and Chiu 2000 ). The degree of humification of SOM decreased slightly from the summit to lakeshore, and the relatively low degree of humification was due to high precipitation and acidity (Chung et al 2012 ).…”

Section: Introductionmentioning

confidence: 99%

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Characterization of soil organic matter in perhumid natural cypress forest: comparison of humification in different particle-size fractions

Chen¹,

Chung

Tian

et al. 2013

Bot Stud

Self Cite

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BackgroundThe Chamaecyparis forest is a valuable natural resource in eastern Asia. The characteristics of soil humic substances and the influence of environmental factors in natural Chamaecyparis forests in subtropical mountain regions are poorly understood. The study site of a perhumid Chamaecyparis forest is in the Yuanyang Lake Preserved Area in northcentral Taiwan. We collected samples from organic horizons (Oi, Oe and Oa) and from the surface horizon (O/A horizon) at the summit, footslope and lakeshore to characterize the composition of the soil organic matter. Samples of organic horizons were dried and ground, and those of the O/A horizon were passed through wet sieving for different particle-size fractions before analysis. The C chemical structure in the samples was determined with CP/MAS 13C NMR spectra.ResultsThe ratios of alkyl-C/O-alkyl-C and aromaticity increased with decomposition of litter from the Oi, Oe, to Oa horizon. The ratio of alkyl-C/O-alkyl-C also increased from coarse (> 250 μm) to very fine (< 2 μm) particle fractions, which indicates increased humification of soil organic matter (SOM) in the fine-sized fractions. However, aromaticity tended to decrease with decreasing particle size, so it may not be useful in evaluating SOM humification of different particle-size fractions.ConclusionsThe humification degree of the samples from O horizons and different particle-size fractions of the O/A horizon showed no gradient change with change in topography. This prevalent slow decomposition of organic matter in these perhumid climate conditions may narrow the difference in humification from the summit to lakeshore.Electronic supplementary materialThe online version of this article (doi:10.1186/1999-3110-54-56) contains supplementary material, which is available to authorized users.

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“…From NMR analysis, distribution of functional groups (aliphatic/aromatic) in molecules is easy to perform. In solid state NMR main disadvantage is amount and purity of sample (CHUNG et al,2012).…”

Section: Soil Organic Matter Analytical Methodsmentioning

confidence: 99%

Natural Organic Matter in Ecosystems - a Review

Kosobucki¹,

Buszewski²

2014

Nova Biotechnologica Et Chimica

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One of the most essential parameters limiting the potential use of the ecosystem (soil, water) is the content of the organic matter. The natural organic matter (NOM) is a ubiquitous component of the lithosphere and hydrosphere that constitutes one of the largest reservoirs of the carbon in the environment. Natural organic substances play several important functions in ecosystems and they are necessary for their normal functioning. Despite many years of the research and using many advanced analytical techniques, their structure has not been fully explained. The main aim of this review is to present the actual state of the knowledge about the natural organic matter and provide a comprehensive overview of the research that has explored up to date in this matter. The additional attention was focused on the relations within and between humic and fulvic acids in terrestrial and aquatic environments. Special attention is focused on the analytical methods used to analysis natural organic matter.

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¹³C-NMR spectroscopy studies of humic substances in subtropical perhumid montane forest soil

Cited by 18 publications

References 44 publications

Soil Organic Carbon Chemical Functional Groups under Different Revegetation Types Are Coupled with Changes in the Microbial Community Composition and the Functional Genes

Soil Organic Carbon Chemical Functional Groups under Different Revegetation Types Are Coupled with Changes in the Microbial Community Composition and the Functional Genes

Characterization of soil organic matter in perhumid natural cypress forest: comparison of humification in different particle-size fractions

Natural Organic Matter in Ecosystems - a Review

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13C-NMR spectroscopy studies of humic substances in subtropical perhumid montane forest soil

Cited by 18 publications

References 44 publications

Soil Organic Carbon Chemical Functional Groups under Different Revegetation Types Are Coupled with Changes in the Microbial Community Composition and the Functional Genes

Soil Organic Carbon Chemical Functional Groups under Different Revegetation Types Are Coupled with Changes in the Microbial Community Composition and the Functional Genes

Characterization of soil organic matter in perhumid natural cypress forest: comparison of humification in different particle-size fractions

Natural Organic Matter in Ecosystems - a Review

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¹³C-NMR spectroscopy studies of humic substances in subtropical perhumid montane forest soil