Clear cutting effects on soil characteristics and C dynamics in Middle Taiga
The disturbances to soil horizonation and to organic matter pools caused by harvesting were assessed in a Middle Taiga zone. Soils were sampled before (pristine forest) and 5 years after clear-cutting in a Russian boreal forest near the village of Ust’Kulom (Komi Republic). After clear-cut, the logg...
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ftunibolognairis:oai:cris.unibo.it:11585/98491 2024-02-04T10:04:55+01:00 Clear cutting effects on soil characteristics and C dynamics in Middle Taiga FALSONE, GLORIA Celi L. Simonov G. Bonifacio E. DAZZI C. Falsone G. Celi L. Simonov G. Bonifacio E. 2007 STAMPA http://hdl.handle.net/11585/98491 eng eng s.n place:s.l info:eu-repo/semantics/altIdentifier/isbn/978889572092 ispartofbook:Changing Soils in a Changing World: the Soils of Tomorrow 5th International Congress of the European Society for Soil Conservation firstpage:210 lastpage:210 numberofpages:1 alleditors:DAZZI C. http://hdl.handle.net/11585/98491 SPODOSOLS HUMIC SUBSTANCES METALLORGANIC COMPLEXES info:eu-repo/semantics/conferenceObject 2007 ftunibolognairis 2024-01-10T17:41:28Z The disturbances to soil horizonation and to organic matter pools caused by harvesting were assessed in a Middle Taiga zone. Soils were sampled before (pristine forest) and 5 years after clear-cutting in a Russian boreal forest near the village of Ust’Kulom (Komi Republic). After clear-cut, the logging residues were left in place, and forest allowed to naturally regenerate. At both sites, soils were bisequal: they showed a sequence of O horizons followed by E and spodic ones, and eluvial horizons depleted in clays overlying argic ones. At the clear-cut site the organic layers thickness was higher and an E/A horizon was also present, above the E one. The soils were characterised for the principal chemical and physical properties. Fractionation of humic substances was carried out on the horizons forming the Podzol sequum: after NaOH-extraction, humic (HA) and fulvic acids (FA) were separated by HCl acidification, purified and freeze-dried. Humic fractions were investigated for their chemical composition by elemental analysis, E4/E6 ratio and FT-IR spectroscopy. The results showed a translocation of organic matter, as expected, with an accumulation of carbon in the spodic horizons. At the clear-cut site, the mineral horizons showed generally lower carbon contents than in the pristine forest, although the organic layers were enriched in C. The C to N ratios were higher than those found at the pristine site, while the humification ratio was lower. In both soils, an accumulation of oxalate extractable-Fe (Feo) and Al (Alo) was visible in the mineral horizons enriched in organic carbon, and their trend with depth was related to the variations in the FA/HA ratio. The spodic index (Alo+0.5Feo), used as a taxonomic evidence for spodic horizons, pointed towards a more intense translocation of metallorganic complexes in the clear-cut site. In the pristine forest the Bhs was too shallow to allow this soil to be identified as a Podzol. According to the WRB, the soils were an Albeluvisol (pristine forest) and a Podzol ... Conference Object taiga IRIS Università degli Studi di Bologna (CRIS - Current Research Information System) |
institution |
Open Polar |
collection |
IRIS Università degli Studi di Bologna (CRIS - Current Research Information System) |
op_collection_id |
ftunibolognairis |
language |
English |
topic |
SPODOSOLS HUMIC SUBSTANCES METALLORGANIC COMPLEXES |
spellingShingle |
SPODOSOLS HUMIC SUBSTANCES METALLORGANIC COMPLEXES FALSONE, GLORIA Celi L. Simonov G. Bonifacio E. Clear cutting effects on soil characteristics and C dynamics in Middle Taiga |
topic_facet |
SPODOSOLS HUMIC SUBSTANCES METALLORGANIC COMPLEXES |
description |
The disturbances to soil horizonation and to organic matter pools caused by harvesting were assessed in a Middle Taiga zone. Soils were sampled before (pristine forest) and 5 years after clear-cutting in a Russian boreal forest near the village of Ust’Kulom (Komi Republic). After clear-cut, the logging residues were left in place, and forest allowed to naturally regenerate. At both sites, soils were bisequal: they showed a sequence of O horizons followed by E and spodic ones, and eluvial horizons depleted in clays overlying argic ones. At the clear-cut site the organic layers thickness was higher and an E/A horizon was also present, above the E one. The soils were characterised for the principal chemical and physical properties. Fractionation of humic substances was carried out on the horizons forming the Podzol sequum: after NaOH-extraction, humic (HA) and fulvic acids (FA) were separated by HCl acidification, purified and freeze-dried. Humic fractions were investigated for their chemical composition by elemental analysis, E4/E6 ratio and FT-IR spectroscopy. The results showed a translocation of organic matter, as expected, with an accumulation of carbon in the spodic horizons. At the clear-cut site, the mineral horizons showed generally lower carbon contents than in the pristine forest, although the organic layers were enriched in C. The C to N ratios were higher than those found at the pristine site, while the humification ratio was lower. In both soils, an accumulation of oxalate extractable-Fe (Feo) and Al (Alo) was visible in the mineral horizons enriched in organic carbon, and their trend with depth was related to the variations in the FA/HA ratio. The spodic index (Alo+0.5Feo), used as a taxonomic evidence for spodic horizons, pointed towards a more intense translocation of metallorganic complexes in the clear-cut site. In the pristine forest the Bhs was too shallow to allow this soil to be identified as a Podzol. According to the WRB, the soils were an Albeluvisol (pristine forest) and a Podzol ... |
author2 |
DAZZI C. Falsone G. Celi L. Simonov G. Bonifacio E. |
format |
Conference Object |
author |
FALSONE, GLORIA Celi L. Simonov G. Bonifacio E. |
author_facet |
FALSONE, GLORIA Celi L. Simonov G. Bonifacio E. |
author_sort |
FALSONE, GLORIA |
title |
Clear cutting effects on soil characteristics and C dynamics in Middle Taiga |
title_short |
Clear cutting effects on soil characteristics and C dynamics in Middle Taiga |
title_full |
Clear cutting effects on soil characteristics and C dynamics in Middle Taiga |
title_fullStr |
Clear cutting effects on soil characteristics and C dynamics in Middle Taiga |
title_full_unstemmed |
Clear cutting effects on soil characteristics and C dynamics in Middle Taiga |
title_sort |
clear cutting effects on soil characteristics and c dynamics in middle taiga |
publisher |
s.n |
publishDate |
2007 |
url |
http://hdl.handle.net/11585/98491 |
genre |
taiga |
genre_facet |
taiga |
op_relation |
info:eu-repo/semantics/altIdentifier/isbn/978889572092 ispartofbook:Changing Soils in a Changing World: the Soils of Tomorrow 5th International Congress of the European Society for Soil Conservation firstpage:210 lastpage:210 numberofpages:1 alleditors:DAZZI C. http://hdl.handle.net/11585/98491 |
_version_ |
1789973710241792000 |