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פותח על ידי קלירמאש פתרונות בע"מ -
The distribution of the stable carbon isotope (13C/12C) in fractions of soil organic matter
Year:
1974
Source of publication :
Geoderma
Authors :
שלינגר, קורט
;
.
Volume :
11
Co-Authors:
Nissenbaum, A., Isotope Department, Weizmann Institute of Science, Rehovot, Israel, Institute for Soils and Water, Agricultural Research Organization, Bet Dagan, Israel
Schallinger, K.M., Isotope Department, Weizmann Institute of Science, Rehovot, Israel, Institute for Soils and Water, Agricultural Research Organization, Bet Dagan, Israel
Facilitators :
From page:
137
To page:
145
(
Total pages:
9
)
Abstract:
The carbon-isotopic composition of fulvic and humic acid from the A horizons of eight soil types, developed under a wide variety of climatological conditions, was measured. The fulvic acid is always enriched in 13C as compared with the humic acid from the same soil by a rather constant factor of 0.9א. The fulvic acids are isotopically closer to the plant source of the organic matter and thus represent an intermediate stage in the formation of humic substances. Depth sections of peat soil showed that carbon isotopes can be used to evaluate the dynamic nature of the fulvic-acid fraction. With depth, a transfer of carbon groups from polysaccharides to fulvic acid is seen. Based on isotopic evidence it is shown that in addition to formation of β-humus, part of the fulvic acid is condensed with depth to a stable humic fraction - humin. © 1974.
Note:
Related Files :
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More details
DOI :
10.1016/0016-7061(74)90012-3
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
19090
Last updated date:
02/03/2022 17:27
Creation date:
16/04/2018 23:26
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Scientific Publication
The distribution of the stable carbon isotope (13C/12C) in fractions of soil organic matter
11
Nissenbaum, A., Isotope Department, Weizmann Institute of Science, Rehovot, Israel, Institute for Soils and Water, Agricultural Research Organization, Bet Dagan, Israel
Schallinger, K.M., Isotope Department, Weizmann Institute of Science, Rehovot, Israel, Institute for Soils and Water, Agricultural Research Organization, Bet Dagan, Israel
The distribution of the stable carbon isotope (13C/12C) in fractions of soil organic matter
The carbon-isotopic composition of fulvic and humic acid from the A horizons of eight soil types, developed under a wide variety of climatological conditions, was measured. The fulvic acid is always enriched in 13C as compared with the humic acid from the same soil by a rather constant factor of 0.9א. The fulvic acids are isotopically closer to the plant source of the organic matter and thus represent an intermediate stage in the formation of humic substances. Depth sections of peat soil showed that carbon isotopes can be used to evaluate the dynamic nature of the fulvic-acid fraction. With depth, a transfer of carbon groups from polysaccharides to fulvic acid is seen. Based on isotopic evidence it is shown that in addition to formation of β-humus, part of the fulvic acid is condensed with depth to a stable humic fraction - humin. © 1974.
Scientific Publication
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