Organic carbon accumulation processes on a forest floor during an early humification stage in a temperate deciduous forest in Japan: Evaluations of chemical compositional changes by 13C NMR and their decomposition rates from litterbag experiment

Kenji Ono, Keizo Hirai, Sayaka Morita, Kenji Ohse, Syuntaro Hiradate

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

To quantitatively clarify the organic carbon accumulation processes on the forest floor during an early stage of humification (3 years), solid-state 13C cross polarization magic angle spinning nuclear magnetic resonance (CPMAS NMR) signals were monitored for phased-humified beech and oak litters and soil surface horizons in the northern Kanto District, Japan. The mass loss rate of the carbon components during the humification for both litters was in the following order: O-alkyl > aromatic > aliphatic > carbonyl carbons. This result indicates that the labile O-alkyl carbons, probably dominated by holocellulose were selectively degraded compared to the other components. 44% of O-alkyl carbon mass for beech and 38% for oak lost throughout 3 years of incubation. Inversely, the mass of aliphatic carbons, which is mainly composed of saturated hydrocarbons, decreased quite slowly from 20 to 10% with humification, probably because a large proportion of the aliphatic carbons are secondary products of microorganisms. The aromatic carbon mass, which would be derived from lignin/tannin and their metabolites, also decreased gradually from 17 to 6% over 3 years. While, the carbonyl carbon mass was quite stable at around 2% throughout the incubation period, probably because the hydrolysis reactions of organic carbon would contribute to the formation of the carbonyl carbons. According to an exponential model, the total carbon stocks on the forest floor converged at 4.2 Mg C ha- 1 for the first few years at the studying site. The carbon compositions converged to intermediate levels between those of the F and A1 horizons. The simulation in the present study is able to represent the carbon accumulation process on the forest floor including a part of the mineral.

Original languageEnglish
Pages (from-to)351-356
Number of pages6
JournalGeoderma
Volume151
Issue number3-4
DOIs
Publication statusPublished - Jul 15 2009
Externally publishedYes

Fingerprint

humification
temperate forests
temperate forest
forest floor
deciduous forests
forest litter
deciduous forest
nuclear magnetic resonance
organic carbon
decomposition
Japan
degradation
carbon
experiment
chemical
rate
evaluation
Fagus
aromatic compounds
litter

All Science Journal Classification (ASJC) codes

  • Soil Science

Cite this

@article{ca75724a83fa4d1383f1e9e6ff3a2a43,
title = "Organic carbon accumulation processes on a forest floor during an early humification stage in a temperate deciduous forest in Japan: Evaluations of chemical compositional changes by 13C NMR and their decomposition rates from litterbag experiment",
abstract = "To quantitatively clarify the organic carbon accumulation processes on the forest floor during an early stage of humification (3 years), solid-state 13C cross polarization magic angle spinning nuclear magnetic resonance (CPMAS NMR) signals were monitored for phased-humified beech and oak litters and soil surface horizons in the northern Kanto District, Japan. The mass loss rate of the carbon components during the humification for both litters was in the following order: O-alkyl > aromatic > aliphatic > carbonyl carbons. This result indicates that the labile O-alkyl carbons, probably dominated by holocellulose were selectively degraded compared to the other components. 44{\%} of O-alkyl carbon mass for beech and 38{\%} for oak lost throughout 3 years of incubation. Inversely, the mass of aliphatic carbons, which is mainly composed of saturated hydrocarbons, decreased quite slowly from 20 to 10{\%} with humification, probably because a large proportion of the aliphatic carbons are secondary products of microorganisms. The aromatic carbon mass, which would be derived from lignin/tannin and their metabolites, also decreased gradually from 17 to 6{\%} over 3 years. While, the carbonyl carbon mass was quite stable at around 2{\%} throughout the incubation period, probably because the hydrolysis reactions of organic carbon would contribute to the formation of the carbonyl carbons. According to an exponential model, the total carbon stocks on the forest floor converged at 4.2 Mg C ha- 1 for the first few years at the studying site. The carbon compositions converged to intermediate levels between those of the F and A1 horizons. The simulation in the present study is able to represent the carbon accumulation process on the forest floor including a part of the mineral.",
author = "Kenji Ono and Keizo Hirai and Sayaka Morita and Kenji Ohse and Syuntaro Hiradate",
year = "2009",
month = "7",
day = "15",
doi = "10.1016/j.geoderma.2009.05.001",
language = "English",
volume = "151",
pages = "351--356",
journal = "Geoderma",
issn = "0016-7061",
publisher = "Elsevier",
number = "3-4",

}

TY - JOUR

T1 - Organic carbon accumulation processes on a forest floor during an early humification stage in a temperate deciduous forest in Japan

T2 - Evaluations of chemical compositional changes by 13C NMR and their decomposition rates from litterbag experiment

AU - Ono, Kenji

AU - Hirai, Keizo

AU - Morita, Sayaka

AU - Ohse, Kenji

AU - Hiradate, Syuntaro

PY - 2009/7/15

Y1 - 2009/7/15

N2 - To quantitatively clarify the organic carbon accumulation processes on the forest floor during an early stage of humification (3 years), solid-state 13C cross polarization magic angle spinning nuclear magnetic resonance (CPMAS NMR) signals were monitored for phased-humified beech and oak litters and soil surface horizons in the northern Kanto District, Japan. The mass loss rate of the carbon components during the humification for both litters was in the following order: O-alkyl > aromatic > aliphatic > carbonyl carbons. This result indicates that the labile O-alkyl carbons, probably dominated by holocellulose were selectively degraded compared to the other components. 44% of O-alkyl carbon mass for beech and 38% for oak lost throughout 3 years of incubation. Inversely, the mass of aliphatic carbons, which is mainly composed of saturated hydrocarbons, decreased quite slowly from 20 to 10% with humification, probably because a large proportion of the aliphatic carbons are secondary products of microorganisms. The aromatic carbon mass, which would be derived from lignin/tannin and their metabolites, also decreased gradually from 17 to 6% over 3 years. While, the carbonyl carbon mass was quite stable at around 2% throughout the incubation period, probably because the hydrolysis reactions of organic carbon would contribute to the formation of the carbonyl carbons. According to an exponential model, the total carbon stocks on the forest floor converged at 4.2 Mg C ha- 1 for the first few years at the studying site. The carbon compositions converged to intermediate levels between those of the F and A1 horizons. The simulation in the present study is able to represent the carbon accumulation process on the forest floor including a part of the mineral.

AB - To quantitatively clarify the organic carbon accumulation processes on the forest floor during an early stage of humification (3 years), solid-state 13C cross polarization magic angle spinning nuclear magnetic resonance (CPMAS NMR) signals were monitored for phased-humified beech and oak litters and soil surface horizons in the northern Kanto District, Japan. The mass loss rate of the carbon components during the humification for both litters was in the following order: O-alkyl > aromatic > aliphatic > carbonyl carbons. This result indicates that the labile O-alkyl carbons, probably dominated by holocellulose were selectively degraded compared to the other components. 44% of O-alkyl carbon mass for beech and 38% for oak lost throughout 3 years of incubation. Inversely, the mass of aliphatic carbons, which is mainly composed of saturated hydrocarbons, decreased quite slowly from 20 to 10% with humification, probably because a large proportion of the aliphatic carbons are secondary products of microorganisms. The aromatic carbon mass, which would be derived from lignin/tannin and their metabolites, also decreased gradually from 17 to 6% over 3 years. While, the carbonyl carbon mass was quite stable at around 2% throughout the incubation period, probably because the hydrolysis reactions of organic carbon would contribute to the formation of the carbonyl carbons. According to an exponential model, the total carbon stocks on the forest floor converged at 4.2 Mg C ha- 1 for the first few years at the studying site. The carbon compositions converged to intermediate levels between those of the F and A1 horizons. The simulation in the present study is able to represent the carbon accumulation process on the forest floor including a part of the mineral.

UR - http://www.scopus.com/inward/record.url?scp=67349145734&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=67349145734&partnerID=8YFLogxK

U2 - 10.1016/j.geoderma.2009.05.001

DO - 10.1016/j.geoderma.2009.05.001

M3 - Article

AN - SCOPUS:67349145734

VL - 151

SP - 351

EP - 356

JO - Geoderma

JF - Geoderma

SN - 0016-7061

IS - 3-4

ER -